1. Air Masses and Fronts

4. Air Mass
Large area of similar temperature (arctic to hot) and humidity (dry to humid).

5. Air Mass First letter is lower case and represents humidity
( continental or maritime)

6. Maritime (m)
Maritime (m)
Moist (high humidity) air

7. Continental (c)
Dry (low humidity) air

8. Air Mass
Second letter is upper case and symbolizes temperature.

9. Tropical (T)
Warm air

10. Polar (P)
Cold air

11. Arctic (A)
Very cold (frigid/bitter) air.

13. mT Types of Air Masses Humid/warm air usually over tropical waters
Maritime Tropical
Humid/warm air usually over tropical waters
Bring mild, humid weather in winter. In summer, it brings hot, humid spells in July and August.

14. mP Humid/cold air coming from over cold ocean waters Maritime Polar
Brings cold, humid weather

15. cT Dry/hot air originating over desert areas Continental Tropical
Brings very hot, dry weather.

16. cP Dry/cold air coming from high latitudes Continental Polar
In winter, it brings very cold weather. In spring and summer, cool, dry days.

17. cA Extremely dry/frigid air coming from high latitudes
Continental Arctic
Extremely dry/frigid air coming from high latitudes
Bitter cold in the winter. Rarely present in summer.

18. Air Mass Source Regions

20. Temperatures in the Mid-Atlantic are in the 60’s due to air mass location, wind direction, and precipitation
Wednesday May 8, 2013

21. December 24, 1989 cA
What type of air mass is this? What is abnormal about this weather map?