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“air mass and weather front” sketchnotes

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Cold Front

How it forms:

When a cold air mass (mP or cP) replaces a warm air mass�(mT or cT).�

Cool air sinks, Warm air rises

Weather it brings:

• clouds
• rain
• snow
• thunderstorms

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**Storms move fast!

Symbol

Warm Front

How it forms:

When a warm air mass (mT or cT) replaces a cold air mass�(mP or cP).�

Weather it brings:�

If the air is humid there will be gentle rain.

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If the air is dry, there will be scattered clouds.

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Storms move slow.

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**After it passes, the weather is warm.

Symbol

Stationary Front

How it forms:

When a warm air mass (mT or cT) and cold air mass (mP or cP) meet, but do not move each other

�

Weather it brings:�

• rain
• snow
• fog
• clouds

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**Similar to Warm Front**

Symbol

Occluded Front

How it forms:

When a warm air mass (mT or cT) is pushed above TWO cold air masses (mP or cP).

�

Weather it brings:�

• rain
• snow

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After the storm passes, the weather is cool and clear

Symbol

When we look at data, �how do we know if there is a weather front?

Recall: When we describe an air mass we explain its humidity (wet or dry) and temperature (cold or warm)

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Recall: A weather front is the boundary where multiple air masses meet.

when we look at data and there is A large change in temperature and humidity its evidence that there Was a change in air masses, And therefore a weather front must have occurred.

Look at the data. Was there a weather front that occurred?

We need to look for a large change in temperature and humidity from one day to another.

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This will show that an air mass changed, and therefore a weather front occurred.

Look at the data. Was there a weather front that occurred?

Claim:

based on the data, A weather front �occurred on day two.

Claim: is short and introduces the topic. It doesn’t explain the data.

Look at the data. Was there a weather front that occurred?

Evidence

On Day one, the temperature was 36°F, the dew point was 15°F and the relative humidity was 41%. On day 2, the temperature was 60°F, the Dew point was 60°F and the Relative humidity was 100%.

Evidence: Write about what you SEE in the data. Don’t explain it.

Look at the data. Was there a weather front that occurred?

Reasoning

There was a big change in temperature and humidity from day one to day two. This proves that there was a change in an air mass (probably cP to mt). A change in air masses means a weather front occurred, and since a warm air mass replaced a cool air mass, it was likely a warm front.

Reasoning: Write what your THINK, using scientific definitions.

Combine into a Full paragraph:

Based on the data, a weather front occurred on day two. On Day 1, the Temperature was 42°F, the Dew Point was 20°F and the Relative Humidity was 41%. On Day 2, the Temperature was 60°F, the Dew Point was 60°F and the Relative Humidity was 100%. There was a big change in temperature and humidity from day one to day two. This proves that there was a change in an air mass (probably cP to mT). A change in air masses means a weather front occurred, and since a warm air mass replaced a cool air mass, it was likely a warm front. Therefore, a weather front occurred on day two.

Analyze Weather Maps

Use the weather map to answer the questions on slide 7

Analyze Weather Maps

Directions: Use the weather map on Slide 6 to answer the questions below.

1. Where can you find a cold front in the U.S. today?

2. Where can you find a warm front in the U.S. today?

3. Where can you find a stationary front in the U.S. today?

4. What do you think the “L” and “H” refers to on the map?

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