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  • All air masses have

two letter symbols for humidity and temp.

(Check p.13 Ref Tables)

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m = marine (wet)

c = continent (dry)

T = Tropical (warm)

P = Polar (cold)

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  • c for Continent

- means dry

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  • P for Polar
    • means cold

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Air Masses are named for where they come from –known as the Source Region

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  • Cold & Dry ( cP ) from Canada
  • Warm & Wet ( mT ) from Gulf of Mexico

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  1. How do we label them?

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  • Fact or Fiction?

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  • Source Region Assessment Questions.