1 | 2012-2013 | |||||||||||||
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2 | ||||||||||||||
3 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm Precip | Season Snow | Season SWE | Season Precip | Base Hi Temp | Base Lo Temp | Notes |
4 | 10/12/2012 | 2.5 | 2.5 | 0.47 | 19 | 2.5 | 0.47 | 2.5 | 0.47 | 0.47 | No total depth sensor. | |||
5 | 10/13/2012 | 0.5 | ~2.5 | 0.11 | 16 | 3 | 0.58 | 3 | 0.58 | 0.58 | ||||
6 | ||||||||||||||
7 | 10/22/2012 | 8 | 8 | 1.06 | 13 | 8 | 1.06 | 11 | 1.64 | 1.64 | 44 | 25 | ||
8 | 10/23/2012 | 9 | unknown | 1.55 | 17 | 17 | 2.61 | 20 | 3.19 | 3.19 | 28 | 22 | ||
9 | 10/24/2012 | Trace | unknown | 0.05 | - | 17 | 2.66 | 20 | 3.24 | 3.24 | ||||
10 | 10/25/2012 | Trace | unknown | 0.05 | - | 17 | 2.71 | 20 | 3.29 | 3.29 | ||||
11 | OCT | 20 | ||||||||||||
12 | 11/2/2012 | Trace | ~6.0 | 0.06 | - | Trace | 0.06 | 20 | 3.35 | 3.35 | 40 | 25 | ||
13 | ||||||||||||||
14 | 11/9/2012 | 5.5 | 11 | 0.44 | 8 | 5.5 | 0.44 | 25.5 | 3.79 | 3.79 | 34 | 12 | Total depth sensor online. Opening day 11/8/12. | |
15 | 11/10/2012 | 7 | 13 | 0.52 | 7 | 12.5 | 0.96 | 32.5 | 4.31 | 4.31 | 15 | 11 | Cornice Bowl open to public. | |
16 | ||||||||||||||
17 | 11/16/2012 | 5 | 12 | 0.5 | 10 | 5 | 0.5 | 37.5 | 4.81 | 4.81 | 46 | 28 | ||
18 | 11/17/2012 | 3.5 | 15.5 | 0.45 | 13 | 8.5 | 0.95 | 41 | 5.26 | 5.26 | ||||
19 | 11/18/2012 | 12.5 | 26.5 | 2.21 | 18 | 21 | 3.16 | 53.5 | 7.47 | 7.47 | 31 | 27 | Thick melt-freeze layer on new snow board. | |
20 | 11/19/2012 | 1 | 26.5 | 0.25 | 23 | 22 | 3.41 | 54.5 | 7.72 | 7.72 | 29 | 26 | ||
21 | ||||||||||||||
22 | 11/21/2012 | Trace | 24 | 0.01 | - | Trace | 0.01 | 54.5 | 7.73 | 7.73 | 36 | 28 | ||
23 | 11/22/2012 | 0 | 22 | 0.18 | - | Trace | 0.19 | 54.5 | 7.73 | 7.91 | 38 | 27 | Rain to at least 10,400' (top of chair 5). | |
24 | ||||||||||||||
25 | 11/29/2012 | 8 | 29 | 1.51 | 19 | 8 | 1.51 | 62.5 | 9.24 | 9.42 | 34 | 27 | Thin melt-freeze crust on top of new snow | |
26 | 11/30/2012 | 12 | 40.5 | 2 | 17 | 20 | 3.51 | 74.5 | 11.24 | 11.42 | 31 | 26 | ||
27 | NOV | 54.5 | ||||||||||||
28 | 12/1/2012 | 20 | 55.5 | 2.65 | 0.65 | 16 | 40 | 6.81 | 94.5 | 13.98 | 14.72 | 30 | 27 | Mixed rain and snow. |
29 | 12/2/2012 | 2 | 54 | 0.35 | 0.57 | 43 | 42 | 7.73 | 96.5 | 14.24 | 15.64 | 33 | 27 | Mixed rain and snow. |
30 | 12/3/2012 | 12 | 62 | 2.72 | 0.25 | 25 | 54 | 10.7 | 108.5 | 16.96 | 18.61 | 35 | 28 | Mixed rain and snow. |
31 | ||||||||||||||
32 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm Precip | Season Snow | Season SWE | Season Precip | Base Hi Temp | Base Lo Temp | Notes |
33 | 12/6/2012 | 2 | 57.5 | 0.35 | 0.05 | 17 | 2 | 0.35 | 110.5 | 17.31 | 19.01 | 37 | 27 | Wet snow until 14:45, then light rain to ~9500'. Thin rain crust on top of new snow. Thick MF ice crust on new snow board. |
34 | ||||||||||||||
35 | 12/12/2012 | Trace | 53 | 0 | - | Trace | 0 | 110.5 | 17.31 | 19.01 | 22 | 40 | ||
36 | 12/13/2012 | 16 | 68.5 | 1.29 | 8 | 16 | 1.29 | 126.5 | 18.6 | 20.3 | 23 | 16 | Widespread natural avalanche activity before and during control work. | |
37 | ||||||||||||||
38 | 12/14/2012 | Trace | 66 | 0 | - | Trace | 0.01 | 126.5 | 18.6 | 20.3 | 24 | 7 | ||
39 | 12/15/2012 | Trace | 63 | 0.01 | - | Trace | 0.01 | 126.5 | 18.61 | 20.31 | 17 | 7 | ||
40 | ||||||||||||||
41 | 12/16/2012 | Trace | 62 | 0.01 | - | Trace | 0.01 | 126.5 | 18.62 | 20.32 | 27 | 8 | ||
42 | 12/17/2012 | 3 | 62 | 0.55 | 19 | 3 | 0.56 | 129.5 | 19.17 | 20.87 | 30 | 24 | Strong SW wind. Extensive snow transport. | |
43 | 12/18/2012 | 16 | 75 | 2.6 | 16 | 19 | 3.16 | 145.5 | 21.77 | 23.47 | 27 | 20 | ||
44 | 12/19/2012 | 3 | 75 | 0.2 | 7 | 22 | 3.36 | 148.5 | 21.97 | 23.67 | 19 | -1 | Moderate NE wind. | |
45 | ||||||||||||||
46 | 12/22/2012 | 7 | 76 | 0.4 | 6 | 7 | 0.4 | 155.5 | 22.37 | 24.07 | 28 | 17 | Increasing precipitation | |
47 | 12/23/2012 | 16 | 89 | 2.36 | 14 | 23 | 2.76 | 171.5 | 24.73 | 26.43 | 25 | 17 | Most of the snow was yesterday. Only 3.4 overnight since cleared at 4:15pm | |
48 | 12/24/2012 | 15.5 | 102.5 | 2.23 | 14 | 38.5 | 4.99 | 187 | 26.96 | 28.66 | 26 | 19 | ||
49 | ||||||||||||||
50 | 12/26/2012 | 18.5 | 113 | 1.75 | 9 | 18.5 | 1.75 | 205.5 | 28.71 | 30.41 | 33 | 17 | ||
51 | 12/27/2012 | 10.5 | 114 | 0.9 | 9 | 29 | 2.65 | 216 | 29.61 | 31.31 | 18 | 9 | Some wind blown snow at the plot | |
52 | ||||||||||||||
53 | 12/29/2012 | 3 | 107.5 | 0.1 | 3 | 3 | 0.1 | 219 | 29.71 | 31.41 | 22 | 9 | Very light dry snow. | |
54 | 12/30/2012 | 1.5 | 107.5 | 0.05 | 3 | 4.5 | 0.15 | 220.5 | 29.76 | 31.46 | 18 | 5 | ||
55 | 12/31/2012 | 0.5 | 105 | 0.04 | 6 | 5 | 0.19 | 221 | 29.8 | 31.5 | 27 | 5 | Top opened for a short period 12/30 PM, but storm didn't really clear until evening. | |
56 | DEC | 146.5 | ||||||||||||
57 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm Precip | Season Snow | Season SWE | Season Precip | Base Hi Temp | Base Lo Temp | Notes |
58 | 1/6/2013 | 2.5 | 99 | 0.15 | 6 | 2.5 | 0.15 | 223.5 | 29.95 | 31.65 | 36 | 15 | ||
59 | 1/7/2013 | 1 | 98 | 0.07 | 6 | 3.5 | 0.22 | 224.5 | 30.02 | 31.72 | 18 | 13 | Top opened with poor visibility 1/6, but the storm did not actually clear until the early hours of 1/7. | |
60 | ||||||||||||||
61 | 1/10/2013 | 7.5 | 101.5 | 0.69 | 10 | 7.5 | 0.69 | 232 | 30.71 | 32.41 | 39 | 9 | ||
62 | ||||||||||||||
63 | 1/12/2013 | 0.5 | 97 | 0.04 | 6 | 0.5 | 0.04 | 232.5 | 30.75 | 32.45 | 13 | -4 | ||
64 | ||||||||||||||
65 | 1/24/2013 | 5 | 93.5 | 0.6 | 12 | 5 | 0.6 | 237.5 | 31.35 | 33.05 | 39 | 29 | Avalanche mitigation was performed on the upper mtn, but it was not opened due to poor visibility. | |
66 | 1/25/2013 | 2 | 94 | 0.4 | 23 | 7 | 1 | 239.5 | 31.75 | 33.45 | 36 | 29 | ||
67 | ||||||||||||||
68 | 1/27/2013 | 5 | 97.5 | 0.68 | 13 | 5 | 0.68 | 244.5 | 32.43 | 34.13 | 34 | 15 | Top opened around noon, poor visibility with light snow in the morning | |
69 | 1/28/2013 | 1.5 | 97 | 0.1 | 7 | 6.5 | 0.78 | 246 | 32.53 | 34.23 | 18 | 0 | ||
70 | JAN | 25 | ||||||||||||
71 | 2/8/2013 | 2.5 | 92 | 0.14 | 6 | 2.5 | 0.14 | 248.5 | 32.67 | 34.37 | 28 | 10 | ||
72 | 2/9/2013 | 1.5 | 91.5 | 0.09 | 6 | 4 | 0.23 | 250 | 32.76 | 34.46 | 17 | 8 | Top opened on 2/8/13 with a high ceiling and intermittent light snow during the day | |
73 | ||||||||||||||
74 | 2/11/2013 | 0.5 | 91.5 | 0.01 | 4 | 0.5 | 0.01 | 250.5 | 32.77 | 34.47 | 22 | 9 | ||
75 | ||||||||||||||
76 | 2/20/2013 | 5 | 94 | 0.27 | 5 | 5 | 0.27 | 255.5 | 33.04 | 34.74 | 20 | 13 | ||
77 | FEB | 9.5 | ||||||||||||
78 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm Precip | Season Snow | Season SWE | Season Precip | Base Hi Temp | Base Lo Temp | Notes |
79 | 3/3/2013 | 2 | 85.5 | 0.32 | 15 | 2 | 0.32 | 257.5 | 33.36 | 35.06 | 43 | 26 | ||
80 | 3/4/2013 | 3.5 | 90 | 0.42 | 13 | 5.5 | 0.74 | 261 | 33.78 | 35.48 | 29 | 17 | Moderate N wind after 3/3 PM clearing. | |
81 | ||||||||||||||
82 | 3/6/2013 | 5 | 91 | 0.57 | 11 | 5 | 0.57 | 266 | 34.35 | 36.05 | 35 | 20 | Graupel at 7am. | |
83 | 3/7/2013 | 3 | 94 | 0.3 | 11 | 8 | 0.87 | 269 | 34.65 | 36.35 | 22 | 19 | ||
84 | 3/8/2013 | 7.5 | 100 | 0.6 | 8 | 15.5 | 1.47 | 276.5 | 35.25 | 36.95 | 23 | 14 | ||
85 | 3/9/2013 | 2.5 | 103 | 0.23 | 9 | 18 | 1.7 | 279 | 35.48 | 37.18 | 28 | 17 | Strong NE wind scoured the upper mountain. | |
86 | ||||||||||||||
87 | 3/19/2013 | 0.5 | 83.5 | 0.05 | 13 | 0.5 | 0.05 | 279.5 | 35.53 | 37.23 | 42 | 28 | ||
88 | ||||||||||||||
89 | 3/20/2013 | 1 | 82 | 0.11 | 11 | 1 | 0.11 | 280.5 | 35.64 | 37.34 | 40 | 26 | Snow depth at plot highly variable due to wind. Sensor data used rather than manual to account for the variability in manual data. | |
90 | 3/21/2013 | 1 | 85 | 0.26 | 25 | 2 | 0.37 | 281.5 | 35.9 | 37.6 | 32 | 27 | Melt-freeze snow. Ice crust on board. | |
91 | ||||||||||||||
92 | 3/31/2013 | 3.5 | 73 | 0.4 | 11 | 3.5 | 0.4 | 285 | 36.3 | 38 | 47 | 27 | Lightning in early AM before opening. | |
93 | Mar | 29.5 | ||||||||||||
94 | 4/1/2013 | 4.5 | 78 | 0.41 | 9 | 8 | 0.81 | 289.5 | 36.71 | 38.41 | 33 | 23 | Trace snow fell afternoon 3/31 and melted on board, causing slight ice crust. | |
95 | ||||||||||||||
96 | 4/5/2013 | 1 | 71 | 0.14 | 14 | 1 | 0.14 | 290.5 | 36.85 | 38.55 | 35 | 28 | Due to warm temps, snow on the board melted, then refroze. New snow depth determined by base depth increase. | |
97 | ||||||||||||||
98 | 4/8/2013 | 3 | 69 | 0.25 | 9 | 3 | 0.25 | 293.5 | 37.1 | 38.8 | 42 | 19 | ||
99 | ||||||||||||||
100 | 4/9/2013 | 0.5 | 69.5 | 0.05 | 11 | 0.5 | 0.05 | 294 | 37.15 | 38.85 | 26 | 15 | ||
101 | ||||||||||||||
102 | 4/16/2013 | 2 | 57 | 0.1 | 5 | 2 | 0.1 | 296 | 37.25 | 38.95 | 31 | 15 | ||
103 | 4/17/2013 | 3 | 59.5 | 0.22 | 7 | 5 | 0.32 | 299 | 37.47 | 39.17 | 22 | 13 | Thin melt-freeze crust on the board from 4/16 AM snow. | |
104 | Apr | 14 | ||||||||||||
105 | 5/5/2013 | Trace | 16.5 | 0.05 | - | Trace | 0.05 | 299 | 37.52 | 39.22 | 49 | 29 | ||
106 | ||||||||||||||
107 | 5/7/2013 | 2.5 | 21.5 | 0.32 | 18 | 2.5 | 0.32 | 301.5 | 37.84 | 39.54 | 34 | 27 | Snow throughout the day but no accumualtion due to warm weather. | |
108 | 5/8/2013 | Trace | 18.5 | 0.05 | - | 2.5 | 0.37 | 301.5 | 37.89 | 39.59 | 36 | 29 | ||
109 | ||||||||||||||
110 | 5/9/2013 | Trace | 18 | 0.16 | - | Trace | 0.16 | 301.5 | 38.05 | 39.75 | 45 | 30 | ||
111 | ||||||||||||||
112 | 5/10/2013 | 0 | 16.5 | 0 | 0.01 | - | 0 | 0.01 | 301.5 | 38.05 | 39.76 | 51 | 34 | Rain |
113 | ||||||||||||||
114 | 5/16/2013 | 0 | 1 | 0 | 0.01 | - | 0 | 0.01 | 301.5 | 38.05 | 39.77 | 51 | 38 | Rain |
115 | ||||||||||||||
116 | 5/17/2013 | Trace | 1 | 0.05 | - | Trace | 0.05 | 301.5 | 38.1 | 39.82 | 42 | 31 | ||
117 | ||||||||||||||
118 | 5/22/2013 | 0 | 0 | 0 | 0.01 | - | 0 | 0.01 | 301.5 | 38.1 | 39.83 | 51 | 35 | Rain |
119 | May | 2.5 | ||||||||||||
120 | All observations are made in the morning, therefore all measurements are for approximately the previous 24 hours. | |||||||||||||
121 | Units for Base Depth, New Snow, Storm Total, and Season Snowfall are in inches. | |||||||||||||
122 | SWE≡Snow Water Equivalent, the amount of water produced from melting a known volume of snow. Measured in inches of H2O. | |||||||||||||
123 | Season Precip includes SWE and rain since October 1st. | |||||||||||||
124 | Units for 24 Hour Base Hi Temp and Base Lo Temp are degrees Fahrenheit. | |||||||||||||
125 | Line breaks indicate clearing between storms, despite occasional consecutive days. | |||||||||||||
126 | All data subject to revision. |
1 | 2011-2012 | |||||||||||||
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2 | ||||||||||||||
3 | ||||||||||||||
4 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm SWE | Season Snow | Season SWE | Season Precip | Base Hi Temp | Base Lo Temp | Notes |
5 | 10/4/2011 | 1 | ~1 | 0.09 | 0.46 | 12 | 1 | 0.09 | 1 | 0.09 | 0.55 | Automated instruments online in PM. Rain derived by averaging Devil's Postpile and CUES. | ||
6 | 10/5/2011 | 12 | ~12 | 2.04 | 17 | 13 | 2.13 | 13 | 2.13 | 2.59 | 41 | 28 | Mixed rain and snow at onset. | |
7 | 10/6/2011 | 5 | ~15 | 0.64 | 13 | 18 | 2.77 | 18 | 2.68 | 3.23 | 26 | 21 | ||
8 | 10/7/2011 | 1.5 | 16.5 | 0.19 | 12 | 19.5 | 2.96 | 19.5 | 0.83 | 3.42 | 33 | 15 | Ice crust on new snow board. Depth sensor online 11:00. | |
9 | ||||||||||||||
10 | 10/11/2011 | 0 | 7 | 0 | 0.06 | - | 0 | 0 | 19.5 | 2.96 | 3.48 | |||
11 | ||||||||||||||
12 | 11/4/2011 | 5 | 5 | 0.36 | 8 | 5 | 0.36 | 24.5 | 3.32 | 3.84 | 40 | 16 | MetOne precip gauge overcaught by 0.18" (~50%). | |
13 | 11/5/2011 | 1.5 | 7 | 0.1 | 6 | 6.5 | 0.46 | 26 | 3.42 | 3.94 | 24 | 8 | MetOne precip gauge overcaught by 0.10" (50%). | |
14 | 11/6/2011 | 7.5 | 12 | 0.55 | 7 | 14 | 1.01 | 33.5 | 3.97 | 4.49 | 21 | 16 | MetOne precip gauge undercaught by 0.06" (~11%) | |
15 | ||||||||||||||
16 | 11/12/2011 | 4.5 | 11 | 0.46 | 10 | 4.5 | 0.46 | 38 | 4.43 | 4.95 | 33 | 25 | ||
17 | 38 | 4.43 | 0.46 | |||||||||||
18 | 11/20/2011 | 5 | 11.5 | 0.28 | 6 | 5 | 0.28 | 43 | 4.71 | 5.23 | 32 | 17 | ||
19 | 11/21/2011 | 6.5 | 16.5 | 0.56 | 9 | 11.5 | 0.84 | 49.5 | 5.27 | 5.79 | 23 | 11 | ||
20 | ||||||||||||||
21 | 12/1/2011 | 1 | 11.5 | 0.11 | 14 | 1 | 0.11 | 50.5 | 5.38 | 5.9 | 41 | 11 | ||
22 | 12/2/2011 | 0.5 | 12 | 0.12 | 20 | 1.5 | 0.12 | 51 | 5.5 | 6.02 | 20 | 11 | ||
23 | ||||||||||||||
24 | 12/5/2011 | 0.5 | 10.5 | 0.01 | 3 | 0.5 | 0.01 | 51.5 | 5.51 | 6.03 | 38 | 10 | ||
25 | ||||||||||||||
26 | 1/20/2012 | 1 | 4.5 | 0.21 | 20 | 1 | 0.21 | 52.5 | 5.72 | 6.24 | 35 | 23 | Snow level ~8,500'. | |
27 | 1/21/2012 | 17.5 | 21 | 3.32 | 19 | 18.5 | 3.53 | 70 | 9.04 | 9.56 | 32 | 28 | ~2 of rain wetted snow on storm board. All instruments freezing up, causing some data errors and undercatching of precip gauges. | |
28 | 1/22/2012 | 9 | 27.5 | 1 | 11 | 27.5 | 4.53 | 79 | 10.04 | 10.56 | 28 | 14 | ||
29 | 1/23/2012 | 19 | 41 | 2.38 | 12 | 46.5 | 6.91 | 98 | 12.42 | 12.94 | 27 | 17 | ||
30 | 1/24/2012 | 8.5 | 43.5 | 1.23 | 15 | 55 | 8.14 | 106.5 | 13.65 | 14.17 | 25 | 15 | ||
31 | ||||||||||||||
32 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm SWE | Season Snow | Season SWE | Season Precip | Base Hi Temp | Base Lo Temp | Notes |
33 | 2/7/2012 | Trace | 31 | 0.01 | - | Trace | 0.01 | 106.5 | 13.66 | 14.18 | 37 | 17 | ||
34 | 2/8/2012 | 1 | 31 | 0.13 | 13 | 1 | 0.14 | 107.5 | 13.79 | 14.31 | 26 | 18 | ||
35 | ||||||||||||||
36 | 2/12/2012 | 1 | 29.5 | 0.12 | 12 | 1 | 0.12 | 108.5 | 13.91 | 14.43 | 33 | 16 | Graupel. | |
37 | ||||||||||||||
38 | 2/13/2012 | 6 | 36 | 0.68 | 12 | 6 | 0.68 | 114.5 | 14.59 | 15.11 | 31 | 16 | ||
39 | 2/14/2012 | 3 | 35 | 0.23 | 8 | 9 | 0.91 | 117.5 | 14.82 | 15.34 | 20 | 13 | Moderate North wind. | |
40 | ||||||||||||||
41 | 2/15/2012 | 8.5 | 44.5 | 0.48 | 6 | 8.5 | 0.48 | 126 | 15.3 | 15.82 | 34 | 11 | Unusually large snowfall for a Northern event. | |
42 | 2/16/2012 | 1.5 | 43 | 0.09 | 5 | 10 | 0.57 | 127.5 | 15.39 | 15.91 | 17 | 11 | ||
43 | ||||||||||||||
44 | 2/27/2012 | 1.5 | 33.5 | 0.11 | 6 | 1.5 | 0.11 | 129 | 15.5 | 16.02 | 33 | 16 | ||
45 | 2/28/2012 | 4.5 | 38 | 0.25 | 6 | 6 | 0.36 | 133.5 | 15.75 | 16.27 | 18 | 8 | ||
46 | ||||||||||||||
47 | 2/29/2012 | 1 | 37.5 | 0.13 | 11 | 1 | 0.13 | 134.5 | 15.88 | 16.4 | 22 | 13 | Mostly wind blown snow on the new snow board. | |
48 | 3/1/2012 | 7 | 44.5 | 1 | 14 | 8 | 1.13 | 141.5 | 16.88 | 17.4 | 22 | 14 | ||
49 | 3/2/2012 | 2.5 | 47.5 | 0.38 | 17 | 10.5 | 1.51 | 144 | 17.26 | 17.78 | 22 | 10 | ||
50 | ||||||||||||||
51 | 3/7/2012 | 4.5 | 43 | 0.54 | 13 | 4.5 | 0.54 | 148.5 | 17.8 | 18.32 | 21 | 1 | ||
52 | ||||||||||||||
53 | 3/14/2012 | 2.5 | 39 | 0.38 | 17 | 2.5 | 0.38 | 151 | 18.18 | 18.7 | 28 | 23 | Melt freeze at new snow interface. | |
54 | 3/15/2012 | 0.5 | 40 | 0.13 | 22 | 3 | 0.51 | 151.5 | 18.31 | 18.83 | 31 | 26 | Melt freeze snow on new snow board. | |
55 | ||||||||||||||
56 | 3/17/2012 | 28 | 62 | 4.1 | 14 | 28 | 4.1 | 179.5 | 22.41 | 22.93 | 31 | 21 | Melt freeze snow on new snow board. | |
57 | 3/18/2012 | 11 | 76 | 0.87 | 8 | 39 | 4.97 | 190.5 | 23.28 | 23.8 | 24 | 10 | ||
58 | 3/19/2012 | 2 | 73 | 0.11 | 6 | 41 | 5.08 | 192.5 | 23.39 | 23.91 | 13 | 6 | ||
59 | ||||||||||||||
60 | 3/23/2012 | 0.5 | 56 | 0.13 | 26 | 0.5 | 0.13 | 193 | 23.52 | 24.04 | 39 | 25 | ||
61 | ||||||||||||||
62 | 3/25/2012 | Trace | 53 | 0.01 | - | Trace | 0.01 | 193 | 23.53 | 24.05 | 38 | 20 | ||
63 | 3/26/2012 | 5.5 | 59.5 | 0.57 | 10 | 5.5 | 0.58 | 198.5 | 24.1 | 24.62 | 24 | 16 | ||
64 | 3/27/2012 | Trace | 58.5 | 0.05 | - | 5.5 | 0.63 | 198.5 | 24.15 | 24.67 | 25 | 16 | ||
65 | ||||||||||||||
66 | 3/28/2012 | 5 | 61 | 0.68 | 13 | 5 | 0.68 | 203.5 | 24.83 | 25.35 | 32 | 21 | ||
67 | 3/29/2012 | 4.5 | 63 | 0.62 | 14 | 9.5 | 1.3 | 208 | 25.45 | 25.97 | 30 | 24 | ||
68 | ||||||||||||||
69 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm SWE | Season Snow | Season SWE | Season Precip | Base Hi Temp | Base Lo Temp | Notes |
70 | 4/1/2012 | 5 | 60.5 | 0.54 | 11 | 5 | 0.54 | 213 | 25.99 | 26.51 | 32 | 13 | ||
71 | ||||||||||||||
72 | 4/6/2012 | 1 | 54 | 0.09 | 9 | 1 | 0.09 | 214 | 26.08 | 26.6 | 19 | 10 | ||
73 | ||||||||||||||
74 | 4/11/2012 | Trace | 46 | 0.05 | - | Trace | 0.05 | 214 | 26.13 | 26.65 | 42 | 23 | ||
75 | 4/12/2012 | 5.5 | 51.5 | 0.69 | 13 | 5.5 | 0.74 | 219.5 | 26.82 | 27.34 | 24 | 16 | Snow depth highly variable due to wind. New snow depth determined by base depth increase since new snow board was scoured. | |
76 | 4/13/2012 | 9 | 59.5 | 0.75 | 8 | 14.5 | 1.49 | 228.5 | 27.57 | 28.09 | 23 | 16 | ||
77 | 4/14/2012 | 12.5 | 68 | 2.17 | 17 | 27 | 3.66 | 241 | 29.74 | 30.26 | 21 | 14 | ||
78 | 4/15/2012 | Trace | 64 | 0.09 | - | 27 | 3.75 | 241 | 29.83 | 30.35 | 33 | 19 | ||
79 | ||||||||||||||
80 | 4/24/2012 | 0 | 33 | 0 | 0.05 | - | - | - | 241 | 29.83 | 30.4 | Rain | ||
81 | ||||||||||||||
82 | 4/26/2012 | 1.5 | 29 | 0.12 | 0.63 | 9 | 1.5 | 0.12 | 242.5 | 29.95 | 31.15 | 42 | 32 | Mixed rain and snow |
83 | 4/27/2012 | 0.5 | 31 | 0.1 | 0.46 | 20 | 2 | 0.22 | 243 | 30.05 | 31.71 | Mixed rain and snow | ||
84 | ||||||||||||||
85 | All observations are made in the morning, therefore all measurements are for approximately the previous 24 hours. | |||||||||||||
86 | Units for Base Depth, New Snow, Storm Total, and Season Snowfall are in inches. | |||||||||||||
87 | SWE≡Snow Water Equivalent, the amount of water produced from melting a known volume of snow, measured in inches of H2O. | |||||||||||||
88 | Season Precip includes SWE and rain since October 1st. | |||||||||||||
89 | Units for 24 Hour Base Hi Temp and Base Lo Temp are degrees Fahrenheit. | |||||||||||||
90 | Line breaks indicate clearing between storms, despite occasional consecutive days. |
1 | 2010/2011 | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2 | |||||||||||||
3 | |||||||||||||
4 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm SWE | Season Snow | Season Precip | Base Hi Temp | Base Lo Temp | Notes |
5 | 10/5/2010 | 4 | 4 | 0.44 | 11 | 4 | 0.44 | 4 | 0.44 | Measurements from Mammoth Pass. | |||
6 | |||||||||||||
7 | 10/24/2010 | 0.76 | 4 | 1.2 | Three days of heavy rain mixed with some sleet at 9000'. Resulted in very hard, thick rain crust to at least 11000'. | ||||||||
8 | 10/25/2010 | 2.44 | 4 | 3.64 | Measurements from Mammoth Pass. | ||||||||
9 | 10/26/2010 | 0.36 | 4 | 4 | |||||||||
10 | |||||||||||||
11 | 10/30/2010 | 5 | 7 | 0.65 | 13 | 5 | 0.65 | 9 | 4.65 | 45 | 25 | Depth sensors online at Sesame, SWE estimated. | |
12 | |||||||||||||
13 | 11/8/2010 | 11 | 12.5 | 1.7 | 16 | 11 | 1.7 | 20 | 6.35 | 33 | 19 | ||
14 | |||||||||||||
15 | 11/10/2010 | 2 | 12 | 0.25 | 13 | 2 | 0.25 | 22 | 6.6 | 38 | 22 | ||
16 | 11/11/2010 | 2 | 13 | 0.34 | 17 | 4 | 0.59 | 24 | 6.94 | 28 | 16 | ||
17 | |||||||||||||
18 | 11/20/2010 | 13 | 20 | 1.75 | 13 | 13 | 1.75 | 37 | 8.69 | 38 | 20 | ||
19 | 11/21/2010 | 21 | 32 | 1.68 | 8 | 34 | 3.43 | 58 | 10.37 | 22 | 10 | ||
20 | 11/22/2010 | 10.5 | 39 | 0.9 | 9 | 44.5 | 4.33 | 68.5 | 11.27 | 15 | 10 | ||
21 | 11/23/2010 | 6 | 34 | 0.58 | 10 | 50.5 | 4.91 | 74.5 | 11.85 | 19 | 13 | ||
22 | 11/24/2010 | 9 | 40 | 0.88 | 10 | 59.5 | 5.79 | 83.5 | 12.73 | 18 | 11 | ||
23 | |||||||||||||
24 | 11/28/2010 | 9 | 39.5 | 1 | 11 | 9 | 1 | 92.5 | 13.73 | 26 | 8 | ||
25 | |||||||||||||
26 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm SWE | Season Snow | Season Precip | Base Hi Temp | Base Lo Temp | Notes |
27 | 12/4/2010 | 1 | 32 | 0.09 | 9 | 1 | 0.09 | 93.5 | 13.82 | 44 | 27 | ||
28 | 12/5/2010 | 2 | 33.5 | 0.25 | 13 | 3 | 0.34 | 95.5 | 14.07 | 32 | 27 | ||
29 | |||||||||||||
30 | 12/6/2010 | 11.5 | 43.5 | 1.37 | 12 | 11.5 | 1.37 | 107 | 15.44 | 35 | 24 | Widespread breakable wind crust. Moderate avalanche activity. | |
31 | |||||||||||||
32 | 12/9/2010 | 0 | 38 | 0 | 0.28 | - | - | 0.28 | 107 | 15.72 | 40 | 31 | Rain turned to snow at 9,000' at approx. 8:40 12/9. |
33 | 12/10/2010 | 1 | 38 | 0.53 | 53 | 1 | 0.81 | 108 | 16.25 | 35 | 32 | Mixed rain and snow at 9,000'. | |
34 | |||||||||||||
35 | 12/15/2010 | 12.5 | 46 | 1.85 | 15 | 12.5 | 1.85 | 120.5 | 18.1 | 36 | 25 | ||
36 | 12/16/2010 | 1.5 | 45.5 | 0.21 | 15 | 14 | 2.06 | 122 | 18.31 | 28 | 11 | Surface hoar in Hemlock and the Bear. Minimal avalanche activity on the upper mountain, Lincoln and Drangon's Back quite active. | |
37 | |||||||||||||
38 | 12/17/2010 | 6 | 49.5 | 0.6 | 10 | 6 | 0.6 | 128 | 18.91 | 31 | 11 | ||
39 | 12/18/2010 | 31.5 | 78.5 | 3.45 | 11 | 37.5 | 4.05 | 159.5 | 22.36 | 29 | 23 | Extremely sensitive avalanche conditions, failing in storm layer and running a very long distance. | |
40 | 12/19/2010 | 31.5 | 98.5 | 3.96 | 13 | 69 | 8.01 | 191 | 26.32 | 31 | 25 | Very sensitive soft slab avalanches, running in new snow. | |
41 | 12/20/2010 | 28.5 | 116.5 | 3.48 | 12 | 97.5 | 11.49 | 219.5 | 29.8 | 30 | 17 | Density of snow decreased dramitically overnight. Density of surface snow perhaps 7%. Widespread sloughing. | |
42 | 12/21/2010 | 21 | 128.5 | 2.05 | 10 | 118.5 | 13.54 | 240.5 | 31.85 | 22 | 17 | Clouds cleared by ~8:00. Evidence of widespread avalanche activity throughout. Began snowing again ~11:00. | |
43 | 12/22/2010 | 9 | 127.5 | 0.71 | 8 | 127.5 | 14.25 | 249.5 | 32.56 | 26 | 19 | ||
44 | 12/23/2010 | 2 | 123.5 | 0.18 | 10 | 129.5 | 14.43 | 251.5 | 32.74 | 31 | 18 | Sun was shining PM 12/22, although summit was still obstructed. Widespread surface sloughing. | |
45 | |||||||||||||
46 | 12/26/2010 | 5 | 118 | 0.6 | 12 | 5 | 0.6 | 256.5 | 33.34 | 39 | 16 | Very strong SW wind. | |
47 | |||||||||||||
48 | 12/29/2010 | 29.5 | 135.5 | 3.33 | 11 | 29.5 | 3.33 | 286 | 36.67 | 34 | 22 | New record for monthly snowfall, 193.5". Many natural avalanches and paths running much farther than usual. | |
49 | 12/30/2010 | 4 | 134.5 | 0.43 | 11 | 33.5 | 3.76 | 290 | 37.1 | 23 | -2 | Strong uplslope NE wind. | |
50 | |||||||||||||
51 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm SWE | Season Snow | Season Precip | Base Hi Temp | Base Lo Temp | Notes |
52 | 1/1/2011 | 1.5 | 128 | 0.14 | 9 | 1.5 | 0.14 | 291.5 | 37.24 | 24 | 3 | ||
53 | 1/2/2011 | 10.5 | 134 | 1.03 | 10 | 12 | 1.17 | 302 | 38.27 | 25 | 12 | ||
54 | 1/3/2011 | 1.5 | 132 | 0.09 | 6 | 13.5 | 1.26 | 303.5 | 38.36 | 22 | 11 | Moderate NE upslope wind. | |
55 | |||||||||||||
56 | 1/12/2011 | 4 | 119.5 | 0.44 | 12 | 4 | 0.44 | 307.5 | 38.8 | 32 | 23 | ||
57 | |||||||||||||
58 | 1/30/2011 | 9.5 | 111.5 | 0.5 | 5 | 9.5 | 0.5 | 317 | 39.3 | 41 | 18 | Unusually warm and dry January. Most areas covered by firm wind and/or melt-freeze crusts. | |
59 | 1/31/2011 | 1 | 110.5 | 0.08 | 7 | 10.5 | 0.58 | 318 | 39.38 | 23 | 14 | Strong NE upslope wind, top of mountain scoured. | |
60 | |||||||||||||
61 | 2/16/2011 | 6 | 101.5 | 1.02 | 17 | 6 | 1.02 | 324 | 40.4 | 35 | 20 | ||
62 | 2/17/2011 | 7 | 114 | 0.59 | 8 | 13 | 1.61 | 331 | 40.99 | 25 | 9 | ||
63 | 2/18/2011 | 28 | 137.5 | 2.08 | 7 | 41 | 3.69 | 359 | 43.07 | 19 | 10 | ||
64 | 2/19/2011 | 24 | 149 | 1.93 | 8 | 65 | 5.62 | 383 | 45 | 26 | 16 | ||
65 | |||||||||||||
66 | 2/21/2011 | 1.5 | 139 | 0.18 | 9 | 1.5 | 0.18 | 384.5 | 45.18 | 20 | 4 | ||
67 | |||||||||||||
68 | 2/25/2011 | 12 | 139 | 1 | 8 | 12 | 1 | 396.5 | 46.18 | 21 | 14 | ||
69 | 2/26/2011 | 18.5 | 151 | 2.7 | 15 | 30.5 | 3.7 | 415 | 48.88 | 21 | 5 | Temperature dropped dramatically after the majority of the snow had fallen. | |
70 | |||||||||||||
71 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm SWE | Season Snow | Season Precip | Base Hi Temp | Base Lo Temp | Notes |
72 | 3/2/2011 | 6.5 | 142 | 0.75 | 12 | 6.5 | 0.75 | 421.5 | 49.63 | 40 | 23 | ||
73 | 3/3/2011 | 7.5 | 147.5 | 1.15 | 16 | 14 | 1.9 | 429 | 50.78 | 31 | 22 | Graupel covered with dense snow. | |
74 | |||||||||||||
75 | 3/6/2011 | 4 | 143.5 | 0.65 | 16 | 4 | 0.65 | 433 | 51.43 | 42 | 25 | ||
76 | 3/7/2011 | 8.5 | 149.5 | 1.22 | 15 | 12.5 | 1.87 | 441.5 | 52.65 | 32 | 21 | Firm crust approximately 2 inches from bottom of new snow. Ice on storm board. | |
77 | |||||||||||||
78 | 3/14/2011 | 1.5 | 137.5 | 0.18 | 13 | 1.5 | 0.18 | 443 | 52.83 | 35 | 28 | ||
79 | |||||||||||||
80 | 3/15/2011 | 0.5 | 135 | 0.07 | 13 | 0.5 | 0.07 | 443.5 | 52.9 | 35 | 29 | ||
81 | |||||||||||||
82 | 3/16/2011 | 5.5 | 136.5 | 0.87 | 16 | 5.5 | 0.87 | 449 | 53.77 | 40 | 30 | Ice on storm board. | |
83 | 3/17/2011 | 2.5 | 142 | 0.37 | 16 | 8 | 1.24 | 451.5 | 54.14 | 30 | 16 | ||
84 | |||||||||||||
85 | 3/19/2011 | 17 | 155 | 1.5 | 9 | 17 | 1.5 | 468.5 | 55.64 | 29 | 18 | ||
86 | 3/20/2011 | 21.5 | 168 | 2.02 | 9 | 38.5 | 3.52 | 490 | 57.66 | 21 | 12 | ||
87 | 3/21/2011 | 26.5 | 188 | 2.44 | 9 | 65 | 5.96 | 516.5 | 60.1 | 22 | 15 | Strong SW wind. | |
88 | 3/22/2011 | 4.5 | 184.5 | 0.3 | 7 | 69.5 | 6.26 | 521 | 60.4 | 18 | 12 | Clean, easy shear in top two inches on tilted storm board. | |
89 | |||||||||||||
90 | 3/23/2011 | 7 | 183 | 0.56 | 8 | 7 | 0.56 | 528 | 60.96 | 25 | 13 | Weather cleared afternoon of 3/22 and all paths were skier compacted. | |
91 | 3/24/2011 | 21 | 198.5 | 2.16 | 10 | 28 | 2.72 | 549 | 63.12 | 23 | 13 | ||
92 | 3/25/2011 | 27 | 213.5 | 2.45 | 9 | 55 | 5.17 | 576 | 65.57 | 21 | 12 | Storm cleared | |
93 | |||||||||||||
94 | 3/26/2011 | 6.5 | 206.5 | 0.95 | 15 | 6.5 | 0.95 | 582.5 | 66.52 | 23 | 12 | broke snowfall record | |
95 | 3/27/2011 | 6.5 | 205 | 0.69 | 11 | 13 | 1.64 | 589 | 67.21 | 25 | 18 | Strong SW wind. Thick wind slab, cornice and sastrugi formation. | |
96 | |||||||||||||
97 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm SWE | Season Snow | Season Precip | Base Hi Temp | Base Lo Temp | Notes |
98 | 4/3/2011 | Trace | 172.5 | 0.1 | - | Trace | 0.1 | 589 | 67.31 | 45 | 28 | ||
99 | |||||||||||||
100 | 4/6/2011 | Trace | 161.5 | 0.07 | - | Trace | 0.07 | 589 | 67.38 | 45 | 29 | Thin layer of graupel. | |
101 | |||||||||||||
102 | 4/7/2011 | 8.5 | 166 | 0.69 | 8 | 8.5 | 0.69 | 597.5 | 68.07 | 43 | 18 | ||
103 | 4/8/2011 | 2.5 | 170 | 0.25 | 10 | 11 | 0.94 | 600 | 68.32 | 19 | -1 | ||
104 | |||||||||||||
105 | 4/9/2011 | 6.5 | 175 | 0.41 | 6 | 6.5 | 0.41 | 606.5 | 68.73 | 16 | -1 | ||
106 | |||||||||||||
107 | 4/13/2011 | 1 | 161 | 0.11 | 10 | 1 | 0.11 | 607.5 | 68.84 | 39 | 22 | Broken stellars over ~3/4" of graupel. | |
108 | 4/14/2011 | 1 | 163 | 0.13 | 13 | 2 | 0.24 | 608.5 | 68.97 | 23 | 12 | Very strong SW wind. Lots of stripping and loading all over mountain. | |
109 | |||||||||||||
110 | 4/18/2011 | Trace | 150 | 0.12 | - | Trace | 0.12 | 608.5 | 69.09 | 49 | 29 | Mixed rain and graupel. | |
111 | 4/19/2011 | Trace | 149 | 0.04 | - | Trace | 0.16 | 608.5 | 69.13 | 38 | 29 | Mixed rain and graupel. | |
112 | |||||||||||||
113 | 4/21/2011 | 6 | 151 | 1.17 | 19 | 6 | 1.17 | 614.5 | 70.3 | 33 | 27 | 2" of graupel mixed with rain 4/20 afternoon followed by ~4" of graupel. Ice crust on new snow board. | |
114 | |||||||||||||
115 | 4/23/2011 | 2 | 152 | 0.38 | 17 | 2 | 0.38 | 616.5 | 70.68 | 38 | 25 | ||
116 | 4/24/2011 | 2 | 153.5 | 0.47 | 23 | 4 | 0.85 | 618.5 | 71.15 | 31 | 28 | 100% 4F 2-3mm graupel. Ice crust on new snow board. | |
117 | |||||||||||||
118 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm SWE | Season Snow | Season Precip | Base Hi Temp | Base Lo Temp | Notes |
119 | 5/8/2011 | 6 | 129.5 | 0.84 | 14 | 6 | 0.84 | 624.5 | 71.99 | 49 | 25 | ||
120 | 5/9/2011 | Trace | 128 | - | - | 6 | 0.84 | 624.5 | 71.99 | 29 | 18 | ||
121 | 5/10/2011 | 2 | 130 | 0.2 | 10 | 8 | 1.04 | 626.5 | 72.19 | 26 | 19 | ||
122 | 5/11/2011 | 0.5 | 127.5 | 0.08 | 16 | 8.5 | 1.12 | 627 | 72.27 | 43 | 25 | ||
123 | |||||||||||||
124 | 5/15/2011 | 6 | 125 | 0.56 | 9 | 6 | 0.56 | 633 | 72.83 | 42 | 17 | ||
125 | 5/16/2011 | 3.5 | 129 | 0.34 | 10 | 9.5 | 0.9 | 636.5 | 73.17 | 22 | 15 | ||
126 | |||||||||||||
127 | 5/17/2011 | 4 | 128 | 1 | 25 | 4 | 1 | 640.5 | 74.17 | 30 | 21 | Most of the new snow was graupel. | |
128 | 5/18/2011 | 8.5 | 138 | 1.48 | 17 | 12.5 | 2.48 | 649 | 75.65 | 25 | 21 | ||
129 | |||||||||||||
130 | 5/19/2011 | 1.5 | 134 | 0.2 | 13 | 1.5 | 0.2 | 650.5 | 75.85 | 34 | 20 | ||
131 | |||||||||||||
132 | 5/29/2011 | 5 | 115.5 | 0.5 | 10 | 5 | 0.5 | 655.5 | 76.35 | 37 | 17 | ||
133 | 5/30/2011 | 1 | 115 | 0.1 | 10 | 6 | 0.6 | 656.5 | 76.45 | 30 | 15 | ||
134 | |||||||||||||
135 | 6/2/2011 | Trace | 110 | - | - | Trace | - | 656.5 | 76.45 | 32 | 21 | ||
136 | |||||||||||||
137 | 6/5/2011 | 3 | 109.5 | 0.75 | 26 | 3 | 0.75 | 659.5 | 77.2 | 39 | 32 | ||
138 | 6/6/2011 | 2 | 108 | 0.47 | 25 | 5 | 1.22 | 661.5 | 77.67 | 44 | 27 | ||
139 | |||||||||||||
140 | 6/29/2011 | 0 | 27 | 0.24 | 661.5 | 77.91 | 56 | 38 | 1-3" of very soggy snow on ch3 traverse. | ||||
141 | 6/30/2011 | 0 | 26.5 | 0.5 | 661.5 | 78.41 | |||||||
142 | |||||||||||||
143 | All observations are made in the morning, therefore all measurements are for new snow during approximately the previous 24 hours. | ||||||||||||
144 | Units for Base Depth, New Snow, Storm Total, and Season Snowfall are in inches. | ||||||||||||
145 | SWE≡Snow Water Equivalent, the amount of water produced from melting a known volume of snow, measured in inches of H2O. | ||||||||||||
146 | Units for 24 Hour Base Hi Temp and Base Lo Temp are degrees Fahrenheit. | ||||||||||||
147 | Line breaks indicate clearing between storms, despite occasional consecutive days. | ||||||||||||
148 |
1 | 2009/2010 | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
2 | |||||||||||||
3 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm SWE | Season Snow | Season SWE | Base Hi Temp | Base Lo Temp | Notes |
4 | 10/4/2009 | 3.5 | 0.32 | 9 | 3.5 | 0.32 | 3.5 | 0.32 | |||||
5 | 10/5/2009 | 6 | 0.56 | 9 | 9.5 | 0.88 | 9.5 | 0.88 | 6.3” HS, 0.88” SWE 10/5. Daily HS based on Mammoth Pass station. SWE divided between 2 days assuming constant density. | ||||
6 | |||||||||||||
7 | 10/13/2009 | Trace | Trace | 36 | 22 | ||||||||
8 | 10/14/2009 | 21.5 | 21.5 | 4.58 | 1.64 | 21 | 21.5 | 4.58 | 31 | 5.46 | 4.58” SWE followed by 1.64” Rain. Runnels indicate heavy rain to at least 11k'. 21.5” HS was max before rain began. | ||
9 | |||||||||||||
10 | 10/19/2009 | 0 | ~4.0 | 0.06 | 0 | Heavy rain in town would indicate greater total rainfall. | |||||||
11 | 10/20/2009 | 2 | 0.46 | 23 | 2 | 0.46 | 33 | 5.92 | |||||
12 | |||||||||||||
13 | 10/27/2009 | Trace | Trace | West winds in excess of 100mph at Chair 1. | |||||||||
14 | 10/28/2009 | 1.5 | 1.5 | 0.11 | 6 | 1.5 | 0.11 | 34.5 | 6.03 | Despite cold T, SWE seems slightly low. No manual observation to verify automatic measurements. NE wind up 100mph @ 11k' | |||
15 | for several days. Starting zones presumed to be very stripped. | ||||||||||||
16 | 11/12/2009 | Trace | Trace | 43 | 27 | ||||||||
17 | 11/13/2009 | 4 | 5 | 0.48 | 12 | 38.5 | 6.51 | 28 | 19 | ||||
18 | |||||||||||||
19 | 11/28/2009 | 12 | 14.5 | 0.7 | 6 | 12 | 0.7 | 50.5 | 7.21 | 34 | 19 | Most of the snow fell after NE wrap around. | |
20 | 11/29/2009 | 1.5 | 13.5 | 0.07 | 5 | 13.5 | 0.77 | 52 | 7.28 | 20 | 14 | ||
21 | |||||||||||||
22 | 12/6/2009 | Trace | 7 | 0.03 | Trace | 0.03 | 52 | 7.31 | 28 | 12 | |||
23 | 12/7/2009 | 7 | 12.5 | 0.69 | 10 | 7 | 0.72 | 59 | 8 | 15 | 12 | Brief graupel at 7:30, ~2hrs prior to measurement. | |
24 | 12/8/2009 | 5.5 | 18.5 | 0.48 | 9 | 12.5 | 1.2 | 64.5 | 8.48 | 17 | 4 | Strong SSW wind. | |
25 | |||||||||||||
26 | 12/10/2009 | Trace | 14.5 | 0.01 | Trace | 0.01 | 64.5 | 8.49 | 31 | 14 | |||
27 | 12/11/2009 | 6.5 | 19 | 0.77 | 12 | 6.5 | 0.78 | 71 | 9.26 | 31 | 23 | Mostly needle snow forms in AM. | |
28 | 12/12/2009 | 17 | 32 | 2.43 | 14 | 23.5 | 3.21 | 88 | 11.69 | 26 | 23 | ||
29 | 12/13/2009 | 33.5 | 54 | 4.21 | 13 | 57 | 7.42 | 121.5 | 15.9 | 28 | 18 | Graupel and some ice pellets late afternoon on 12/12. Precip gauge overwhelmed by snowfall. | |
30 | 12/14/2009 | 3.5 | 52.5 | 0.61 | 17 | 60.5 | 8.03 | 125 | 16.51 | 22 | 18 | This storm almost doubled the season total snowfall and SWE. 4-6mm surface hoar on Hemlock Ridge. | |
31 | |||||||||||||
32 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm SWE | Season Snow | Season SWE | Base Hi Temp | Base Lo Temp | Notes |
33 | 12/22/2009 | 9.5 | 49 | 1.19 | 12 | 9.5 | 1.19 | 134.5 | 17.7 | 31 | 15 | ||
34 | 12/23/2009 | Trace | 47.5 | 0.01 | 9.5 | 1.2 | 134.5 | 17.71 | 19 | 5 | Extremely strong NE winds. Top scoured down to rocks in some places. | ||
35 | |||||||||||||
36 | 12/27/2009 | 1 | 44 | 0.11 | 11 | 1 | 0.11 | 135.5 | 17.82 | 40 | 19 | ||
37 | |||||||||||||
38 | 12/29/2009 | 5 | 47.5 | 0.41 | 8 | 5 | 0.41 | 140.5 | 18.23 | 30 | 10 | ||
39 | 12/30/2009 | 6.5 | 50 | 0.9 | 13 | 11.5 | 1.31 | 147 | 19.13 | 26 | 19 | Widespread small avalanche activity. | |
40 | 12/31/2009 | 0.5 | 50 | 0.04 | 8 | 12 | 1.35 | 147.5 | 19.17 | 31 | 13 | ||
41 | |||||||||||||
42 | 1/9/2010 | 1 | 42 | 0.07 | 7 | 1 | 0.07 | 148.5 | 19.24 | 44 | 31 | ||
43 | 1/10/2010 | 2 | 44 | 0.24 | 12 | 3 | 0.31 | 150.5 | 19.48 | 44 | 28 | 2-4mm graupel on surface, ice crust on storm board. | |
44 | |||||||||||||
45 | 1/12/2010 | Trace | 43 | Trace | 150.5 | 19.48 | 43 | 12 | |||||
46 | 1/13/2010 | 15.5 | 58.5 | 2.05 | 13 | 15.5 | 2.05 | 166 | 21.53 | 43 | 23 | 12-16" avalanche results across most of lower mountain. Strong NE wind following storm scoured most starting zones. | |
47 | |||||||||||||
48 | 1/18/2010 | 3 | 54.5 | 0.35 | 11 | 3 | 0.35 | 169 | 21.88 | 29 | 22 | 6-10mm crust of melt-freeze on snow surface. | |
49 | 1/19/2010 | 25.5 | 73 | 2.69 | 11 | 28.5 | 3.04 | 194.5 | 24.57 | 29 | 18 | 10" new snow overnight. Many small releases PM of 1/18 on ski cuts, very few results AM of 1/19. | |
50 | 1/20/2010 | 14 | 81 | 1.08 | 8 | 42.5 | 4.12 | 208.5 | 25.65 | 29 | 15 | Many 10-12" releases on ski cuts in AM. Hard rime ice on surface at top of Gravy Chute (~10k') | |
51 | 1/21/2010 | 20.5 | 92 | 1.71 | 8 | 63 | 5.83 | 229 | 27.36 | 20 | 5 | Strong SW winds PM 1/20. 4 to 6 hour clearing in storm AM 1/21. New snowfall beginning again at 9:30. | |
52 | 1/22/2010 | 23.5 | 107 | 2 | 9 | 85.5 | 7.71 | 252.5 | 29.36 | 20 | 9 | ||
53 | 1/23/2010 | 4 | 104 | 0.28 | 7 | 90.5 | 8.11 | 256.5 | 29.64 | 16 | 12 | Chair 23 opens late in day. | |
54 | 1/24/2010 | Trace | 98 | 0.06 | 90.5 | 8.17 | 256.5 | 29.7 | 29 | 8 | Top opens. | ||
55 | |||||||||||||
56 | 1/25/2010 | 1.5 | 95 | 0.25 | 16 | 1.5 | 0.25 | 258 | 29.95 | 33 | 21 | Very little new snow, but a great deal of wind drifting. | |
57 | |||||||||||||
58 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm SWE | Season Snow | Season SWE | Base Hi Temp | Base Lo Temp | Notes |
59 | 1/26/2010 | 7 | 97 | 0.96 | 13 | 7 | 0.96 | 265 | 30.91 | 37 | 22 | Good clearing and top opened 1/25. | |
60 | |||||||||||||
61 | 1/30/2010 | 2.5 | 89 | 0.16 | 6 | 2.5 | 0.16 | 267.5 | 31.07 | 37 | 20 | ||
62 | 1/31/2010 | 1.5 | 88 | 0.11 | 7 | 4 | 0.27 | 269 | 31.18 | 24 | 9 | ||
63 | |||||||||||||
64 | 2/5/2010 | 10 | 88 | 1.31 | 13 | 10 | 1.13 | 279 | 32.49 | 31 | 23 | ||
65 | 2/6/2010 | 8 | 96.5 | 0.93 | 12 | 18 | 2.24 | 287 | 33.42 | 28 | 24 | ||
66 | 2/7/2010 | 4 | 97 | 0.32 | 8 | 22 | 2.56 | 291 | 33.74 | 27 | 17 | Moderate N wind scoured loading zones AM of 2/7. | |
67 | |||||||||||||
68 | 2/9/2010 | Trace | 93 | 0.01 | Trace | 0.01 | 291 | 33.75 | 32 | 18 | |||
69 | 2/10/2010 | 5.5 | 97 | 0.43 | 8 | 5.5 | 0.44 | 296.5 | 34.18 | 25 | 11 | Strong NE wind overnight scoured loading zones. | |
70 | |||||||||||||
71 | 2/20/2010 | Trace | 82 | Trace | 296.5 | 34.18 | 37 | 24 | |||||
72 | 2/21/2010 | 5 | 86.5 | 0.39 | 8 | 5 | 0.39 | 301.5 | 34.57 | 25 | 17 | ||
73 | 2/22/2010 | 12 | 98 | 1 | 8 | 17 | 1.39 | 313.5 | 35.57 | 22 | 7 | Strong NE wind in AM scoured upper loading zones. | |
74 | |||||||||||||
75 | 2/24/2010 | 20.5 | 105.5 | 1.88 | 9 | 20.5 | 1.88 | 334 | 37.45 | 33 | 20 | ||
76 | 2/25/2010 | 9.5 | 112 | 1.21 | 13 | 30 | 3.09 | 343.5 | 38.66 | 25 | 22 | ||
77 | |||||||||||||
78 | 2/27/2010 | 27 | 131 | 3.01 | 11 | 27 | 3.01 | 370.5 | 41.67 | 34 | 23 | ||
79 | 2/28/2010 | 4.5 | 130 | 0.37 | 9 | 31.5 | 3.38 | 375 | 42.04 | 28 | 20 | Strong NE wind scoured upper loading zones PM of 2/27. | |
80 | |||||||||||||
81 | Date | New Snow | Base Depth | SWE | Rain | % Density | Storm Snow | Storm SWE | Season Snow | Season SWE | Base Hi Temp | Base Lo Temp | Notes |
82 | 3/3/2010 | 6 | 124 | 0.77 | 13 | 6 | 0.77 | 381 | 42.81 | 31 | 18 | Top opened for approximately one hour, moderate skier compaction. | |
83 | |||||||||||||
84 | 3/4/2010 | 13 | 134.5 | 1.16 | 9 | 13 | 1.16 | 394 | 43.97 | 25 | 11 | Very heavy wind loading from SW wind. | |
85 | |||||||||||||
86 | 3/9/2010 | 5.5 | 125 | 0.57 | 10 | 5.5 | 0.57 | 399.5 | 44.54 | 24 | 2 | Strong SW wind during majority of precip followed by moderate NE winds. | |
87 | |||||||||||||
88 | 3/10/2010 | 3 | 125.5 | 0.14 | 5 | 3 | 0.14 | 402.5 | 44.68 | 26 | 9 | Strong SW wind overnight. More wind transported snow than snowfall. | |
89 | |||||||||||||
90 | 3/13/2010 | 11 | 130.5 | 1.53 | 14 | 11 | 1.53 | 413.5 | 46.21 | 34 | 17 | ||
91 | |||||||||||||
92 | 3/27/2010 | 1.5 | 104 | 0.09 | 6 | 1.5 | 0.09 | 415 | 46.3 | 39 | 18 | Storm preceded by two weeks of high pressure, with significant melt-freeze. | |
93 | |||||||||||||
94 | 3/30/2010 | 4.5 | 102.5 | 0.63 | 15 | 4.5 | 0.63 | 419.5 | 46.93 | 44 | 27 | ||
95 | 3/31/2010 | 15.5 | 114.5 | 1.51 | 10 | 20 | 2.14 | 435 | 48.44 | 27 | 17 | Very strong SW winds in excess of 120mph at Top previous day. | |
96 | 4/1/2010 | 3 | 117.5 | 0.26 | 9 | 23 | 2.4 | 438 | 48.7 | 20 | 3 | ||
97 | |||||||||||||
98 | 4/2/2010 | Trace | 115 | Trace | 438 | 48.7 | 27 | 6 | |||||
99 | 4/3/2010 | 4 | 118.5 | 0.96 | 24 | 4 | 0.96 | 442 | 49.66 | 30 | 21 | Dense wind slabs. Very little avalanche activity. | |
100 | |||||||||||||
101 | 4/4/2010 | 0.5 | 117 | 0.08 | 16 | 0.5 | 0.08 | 442.5 | 49.74 | 29 | 17 | ||
102 | |||||||||||||
103 | 4/5/2010 | 25.5 | 135 | 3.03 | 12 | 25.5 | 3.03 | 468 | 52.77 | 25 | 16 | 100+ mph WSW to SW winds for several hours overnight at Top and Ch22 stations. | |
104 | 4/6/2010 | 2 | 138.5 | 0.23 | 12 | 27.5 | 3.26 | 470 | 53 | 20 | 13 | Winds shifted to NW in AM of 4/6. | |
105 | |||||||||||||
106 | 4/12/2010 | 19.5 | 134.5 | 1.98 | 10 | 19.5 | 1.98 | 489.5 | 54.98 | 36 | 17 | ||
107 | 4/13/2010 | 2.5 | 134.5 | 0.35 | 14 | 22 | 2.33 | 492 | 55.33 | 23 | 16 | ||
108 | |||||||||||||
109 | 4/20/2010 | Trace | 112.5 | 0.04 | Trace | 0.04 | 492 | 55.37 | 51 | 31 | |||
110 | 4/21/2010 | 7 | 123.5 | 0.7 | 10 | 7 | 0.74 | 499 | 56.07 | 32 | 15 | Brief clearing AM of 4/21. | |
111 | 4/22/2010 | 2.5 | 123.5 | 0.16 | 6 | 9.5 | 0.9 | 501.5 | 56.23 | 22 | 14 | ||
112 | 4/23/2010 | 2 | 123.5 | 0.17 | 9 | 11.5 | 1.07 | 503.5 | 56.4 | 28 | 20 | ||
113 | |||||||||||||
114 | All observations are made in the morning, therefore all measurements are for new snow during approximately the previous 24 hours. | ||||||||||||
115 | Units for Base Depth, New Snow, Storm Total, and Season Snowfall are in inches. | ||||||||||||
116 | SWE≡Snow Water Equivalent, the amount of water produced from melting a known volume of snow, measured in inches of H2O. | ||||||||||||
117 | Units for 24 Hour Base Hi Temp and Base Lo Temp are degrees Fahrenheit. | ||||||||||||
118 | HS=Height of Snow | ||||||||||||
119 | Line breaks indicate clearing between storms, despite occasional consecutive days. |
1 | 2008/2009 | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
2 | ||||||||||||
3 | Date | New Snow | Base Depth | SWE | % Density | Storm Snow | Storm SWE | Season Snow | Season SWE | Base Hi Temp | Base Lo Temp | Notes |
4 | 10/4/2008 | 1 | 1 | 0.13 | 13 | 1 | 0.13 | 1 | 0.13 | 48 | 33 | |
5 | ||||||||||||
6 | 10/10/2008 | 4 | - | 0.52 | 13 | 4 | 0.52 | 5 | 0.65 | 45 | 26 | |
7 | ||||||||||||
8 | 10/31/2008 | 5 | 6.5 | 1.14 | 23 | 5 | 1.14 | 10 | 1.79 | 52 | 31 | |
9 | 11/1/2008 | 2 | 4.5 | 0.43 | 22 | 7 | 1.57 | 12 | 2.22 | 39 | 33 | After 2" snow, ~2" rain up to 11k', changed to mixed rain & snow at 9k' ~15:00 11/1 |
10 | 11/2/2008 | 5.5 | 10 | 1.35 | 36 | 12.5 | 2.92 | 17.5 | 3.57 | 39 | 28 | |
11 | 11/3/2008 | 1 | 11 | 0.17 | 26 | 13.5 | 3.09 | 18.5 | 3.74 | 31 | 24 | |
12 | ||||||||||||
13 | 11/4/2008 | 3 | 11.5 | 0.53 | 20 | 3 | 0.53 | 21.5 | 4.27 | 28 | 23 | |
14 | ||||||||||||
15 | 11/9/2008 | 11 | 20 | 1.22 | 11 | 11 | 1.22 | 32.5 | 5.49 | 46 | 21 | |
16 | ||||||||||||
17 | 11/26/2008 | 1 | 9.5 | 0.13 | 13 | 1 | 0.13 | 33.5 | 5.62 | 41 | 25 | |
18 | 11/27/2008 | 3 | 13.5 | 0.26 | 9 | 4 | 0.39 | 36.5 | 5.88 | 30 | 19 | |
19 | ||||||||||||
20 | 12/13/2008 | 1 | 10 | 0.28 | 28 | 1 | 0.28 | 37.5 | 6.16 | 43 | 18 | |
21 | 12/14/2008 | 7 | 16 | 0.43 | 6 | 8 | 0.71 | 44.5 | 6.59 | 21 | 6 | |
22 | 12/15/2008 | 20.5 | 31 | 1.51 | 7 | 28.5 | 2.22 | 65 | 8.1 | 14 | 7 | |
23 | 12/16/2008 | 20.5 | 38 | 0.94 | 5 | 48.5 | 3.16 | 85.5 | 9.04 | 15 | 7 | |
24 | ||||||||||||
25 | 12/19/2008 | 6 | 30 | 0.54 | 9 | 6 | 0.54 | 91.5 | 9.58 | 22 | 11 | |
26 | 12/20/2008 | 6 | 32 | 0.92 | 15 | 12 | 1.46 | 97.5 | 10.5 | 30 | 16 | |
27 | ||||||||||||
28 | Date | New Snow | Base Depth | SWE | % Density | Storm Snow | Storm SWE | Season Snow | Season SWE | Base Hi Temp | Base Lo Temp | Notes |
29 | 12/22/2008 | 15.5 | 41 | 2.09 | 13 | 15.5 | 2.09 | 113 | 12.59 | 34 | 21 | |
30 | 12/23/2008 | 15 | 46.5 | 1.63 | 11 | 30.5 | 3.72 | 128 | 14.22 | 21 | 11 | |
31 | 12/24/2008 | 1 | 46 | 0.06 | 6 | 31.5 | 3.78 | 129 | 14.28 | 22 | 11 | |
32 | 12/25/2008 | 16.5 | 58 | 2.28 | 14 | 48 | 6.06 | 145.5 | 16.56 | 26 | 20 | |
33 | 12/26/2008 | 11.5 | 64 | 2.3 | 20 | 59.5 | 8.36 | 157 | 18.86 | 24 | 7 | |
34 | ||||||||||||
35 | 1/3/2009 | 4 | 53 | 0.7 | 18 | 4 | 0.7 | 161 | 19.56 | 30 | 10 | |
36 | ||||||||||||
37 | 1/22/2009 | 7 | 51 | 1.04 | 15 | 7 | 1.04 | 168 | 20.6 | 43 | 31 | |
38 | 1/23/2009 | 10 | 59.5 | 1.86 | 19 | 17 | 2.9 | 178 | 22.46 | 33 | 32 | |
39 | 1/24/2009 | 19 | 73 | 3.09 | 16 | 36 | 5.99 | 197 | 25.55 | 37 | 28 | Rain and snow, SWE includes both. 2cm ice crust on new snow board. |
40 | 1/25/2009 | 14 | 79 | 1.54 | 11 | 50 | 7.53 | 211 | 27.09 | 29 | 17 | |
41 | 1/26/2009 | 8 | 83 | 0.5 | 6 | 58 | 8.03 | 219 | 27.59 | 18 | 8 | |
42 | 1/27/2009 | 1 | 80 | 0.05 | 5 | 59 | 8.08 | 220 | 27.64 | 20 | 4 | |
43 | ||||||||||||
44 | 2/6/2009 | 14.5 | 79 | 1.1 | 8 | 14.5 | 1.1 | 234.5 | 28.74 | 26 | 22 | |
45 | 2/7/2009 | 9.5 | 85 | 0.77 | 8 | 24 | 1.87 | 244 | 29.51 | 25 | 19 | |
46 | 2/8/2009 | 0.5 | 83 | 0.03 | 6 | 24.5 | 1.9 | 244.5 | 29.54 | 23 | 14 | |
47 | 2/9/2009 | 16 | 88.5 | 1.2 | 8 | 40.5 | 3.1 | 260.5 | 30.74 | 23 | 9 | |
48 | ||||||||||||
49 | 2/11/2009 | 10.5 | 92 | 0.59 | 10 | 10.5 | 0.59 | 271 | 31.33 | 30 | 3 | |
50 | ||||||||||||
51 | 2/12/2009 | 1 | 89 | 0.07 | 7 | 1 | 0.07 | 272 | 31.4 | 20 | 11 | |
52 | ||||||||||||
53 | Date | New Snow | Base Depth | SWE | % Density | Storm Snow | Storm SWE | Season Snow | Season SWE | Base Hi Temp | Base Lo Temp | Notes |
54 | 2/14/2009 | 15.5 | 98 | 1.14 | 7 | 15.5 | 1.14 | 287.5 | 32.54 | 14 | 10 | |
55 | 2/15/2009 | 4 | 96 | 0.24 | 6 | 19.5 | 1.38 | 291.5 | 32.78 | 20 | 11 | |
56 | 2/16/2009 | 4 | 95 | 0.3 | 8 | 23.5 | 1.68 | 295.5 | 33.08 | 23 | 16 | |
57 | 2/17/2009 | 30 | 120.5 | 2.19 | 7 | 53.5 | 3.87 | 325.5 | 35.27 | 20 | 15 | |
58 | 2/18/2009 | 14.5 | 123 | 0.74 | 5 | 68 | 4.61 | 340 | 36.01 | 17 | 5 | |
59 | ||||||||||||
60 | 2/22/2009 | 0.5 | 103.5 | 0.06 | 12 | 0.5 | 0.06 | 340.5 | 36.07 | 41 | 26 | Snow level approximately 7,500' |
61 | 2/23/2009 | 17.5 | 115.5 | 2.44 | 14 | 18 | 2.5 | 358 | 38.51 | 31 | 27 | |
62 | 2/24/2009 | 3.5 | 118 | 0.41 | 12 | 21.5 | 2.91 | 361.5 | 38.92 | 31 | 27 | |
63 | ||||||||||||
64 | 2/25/2009 | 1 | 114.5 | 0.12 | 12 | 1 | 0.12 | 362.5 | 39.04 | 38 | 24 | 1" of graupel above 1" pencil hard wind/melt-freeze crust on top of fist hard new snow |
65 | 2/26/2009 | 1.5 | 112 | 0.29 | 19 | 2.5 | 0.41 | 364 | 39.33 | 27 | 23 | |
66 | ||||||||||||
67 | 3/2/2009 | 15 | 118 | 2.22 | 15 | 15 | 2.22 | 379 | 41.55 | 38 | 24 | Trace graupel on top of fist hard new snow above wind/melt-freeze crust |
68 | 3/3/2009 | 4 | 119.5 | 0.97 | 24 | 19 | 3.19 | 383 | 42.52 | 32 | 21 | 2-6mm graupel and ice pellets. Snow level approximately 8,500' |
69 | 3/4/2009 | 23.5 | 136.5 | 3.01 | 13 | 42.5 | 6.2 | 406.5 | 45.53 | 23 | 19 | Very little avalanche activity on lower mtn. |
70 | 3/5/2009 | 3 | 136 | 0.36 | 12 | 45.5 | 6.56 | 409.5 | 45.89 | 18 | 12 | 10mm wind crust 20mm down, ice crust on storm board |
71 | ||||||||||||
72 | 3/7/2009 | 0.5 | 131 | 0.06 | 12 | 0.5 | 0.06 | 410 | 45.95 | 20 | 5 | |
73 | ||||||||||||
74 | 3/8/2009 | 0.5 | 128 | 0.03 | 6 | 0.5 | 0.03 | 410.5 | 45.98 | 35 | 17 | |
75 | ||||||||||||
76 | 3/16/2009 | Trace | 114.5 | 0.01 | - | Trace | 0.01 | 410.5 | 45.99 | 39 | 27 | |
77 | ||||||||||||
78 | Date | New Snow | Base Depth | SWE | % Density | Storm Snow | Storm SWE | Season Snow | Season SWE | Base Hi Temp | Base Lo Temp | Notes |
79 | 3/22/2009 | 14.5 | 121 | 1.89 | 13 | 14.5 | 1.89 | 425 | 47.88 | 32 | 18 | New snow on top of 4-8mm graupel above sun crust. |
80 | 3/23/2009 | 1.5 | 123 | 0.13 | 9 | 16 | 2.02 | 426.5 | 48.01 | 18 | 2 | Extremely cold temps with strong NE wind. |
81 | ||||||||||||
82 | 4/4/2009 | 1 | 99 | 0.05 | 5 | 1 | 0.05 | 427.5 | 48.06 | 28 | 5 | |
83 | ||||||||||||
84 | 4/8/2009 | 5 | 98.5 | 0.66 | 13 | 5 | 0.66 | 432.5 | 48.72 | 41 | 18 | |
85 | 4/9/2009 | 4.5 | 101 | 0.64 | 14 | 9.5 | 1.3 | 437 | 48.72 | 25 | 18 | Ice crust on storm board. |
86 | 4/10/2009 | 9.5 | 107.5 | 1.02 | 11 | 19 | 2.32 | 446.5 | 50.38 | 27 | 21 | |
87 | ||||||||||||
88 | 4/11/2009 | 1.5 | 105 | 0.12 | 8 | 1.5 | 0.12 | 448 | 50.5 | 30 | 16 | |
89 | ||||||||||||
90 | 4/14/2009 | Trace | 96.5 | Trace | - | Trace | Trace | 448 | 50.5 | 46 | 28 | Graupel |
91 | 4/15/2009 | 1.5 | 99 | 0.1 | 7 | 1.5 | 0.1 | 449.5 | 50.6 | 30 | 5 | |
92 | ||||||||||||
93 | 4/24/2009 | 3.5 | 84.5 | 0.41 | 12 | 3.5 | 0.41 | 453 | 51.01 | 44 | 27 | |
94 | 4/25/2009 | 3.5 | 87.5 | 0.62 | 18 | 7 | 1.03 | 456.5 | 51.63 | 28 | 16 | |
95 | ||||||||||||
96 | 5/1/2009 | 0.5 | 73.5 | 0.28 | 56 | 0.5 | 0.28 | 457 | 51.91 | 50 | 35 | Rain on snow. Freezing level briefly above 11k'. |
97 | 5/2/2009 | 10.5 | 85 | 1.96 | 19 | 11 | 2.24 | 467.5 | 53.87 | 42 | 29 | ~0.1" rain followed by ~1.9" SWE. |
98 | 5/3/2009 | 0.5 | 82.5 | 0.35 | 70 | 11.5 | 2.59 | 468 | 54.22 | 34 | 15 | Snow fell throughout most of 5/2, but was constantly melting and consolidating. |
99 | 5/4/2009 | 0 | 80.5 | 0.28 | - | 11.5 | 2.87 | 468 | 54.5 | 37 | 34 | Snow fell throughout most of 5/4, but was constantly melting and consolidating. |
100 | 5/5/2009 | 0 | 79 | 0.05 | - | 11.5 | 2.92 | 468 | 54.55 | 45 | 33 | Rain afternoon of 5/4 |
101 | ||||||||||||
102 | 6/5/2009 | Trace | 0 | Trace | - | Trace | Trace | 468 | 54.55 | 48 | 32 | Prior to this storm there were several mixed events with trace graupel above 10k' |
103 | 6/6/2009 | 2 | 0.5 | 0.25 | 13 | 2 | 0.25 | 470 | 54.8 | 34 | 29 | |
104 | 6/7/2009 | Trace | 0 | 0.03 | - | 2 | 0.28 | 470 | 54.83 | 40 | 31 | |
105 | ||||||||||||
106 | ||||||||||||
107 | Units for Base Depth, New Snow, Storm Total, and Season Snowfall are in inches. | |||||||||||
108 | SWE≡Snow Water Equivalent, the amount of water produced from melting a known volume of snow, measured in inches of H2O. | |||||||||||
109 | Units for 24 Hour Base Hi Temp and Base Lo Temp are degrees Fahrenheit. | |||||||||||
110 | Line breaks indicate clearing between storms, despite occasional consecutive days. | |||||||||||
111 | ||||||||||||
112 | ||||||||||||
113 | ||||||||||||
114 |