Topic: Air Masses &Fronts Key Terms: –Air Mass –Front
Air mass: --- Source Region – ---
Air Mass Cold & Dry
Moisture terms: Dry –--- Moist
Temp. terms Cold Formed in northern areas P – --- Extreme Cold Formed in polar areas A Warm Formed in southern areas T - ---
ESRT pg 13 = Dry & extremely Cold = Dry & Cold = Dry & Hot = Moist & Hot = Moist & Cold
What type of air mass?
cP: -- mT: -- Most common Air masses in Eastern US
Cold & Dry Warm & Moist cP mT
cPmT
Boundary where two different air masses meet. Front
Cool Air Warm Air
Warm air rises because it is less dense.
A Cumulonimbus Cloud “Thunderhead”
Rain
20-50 miles Storms are very small, miles or so and last only a brief time.
Right now it’s nice and warm Gadzukes! It got cold!
Cold Front Cold Air Warm Air Movement of air
Warm Air Cool Air Frontal interface Warm is less dense and it likes to float!
Warm Air Cool Air
First come the Cirrus Which way is the weather coming from?
It’s pretty cool now Such pretty cirrus clouds!
Hmmm, the clouds are getting low The warm front gets closer…
Clouds get lower and thicker
Darn! It’s starting to drizzle.
Lower and thicker then gentle rain for a long time.
It’s much warmer now
Warm Front Warm Air Cool Air
--- STATIONARY FRONT
Occluded Front --- <>
Mid-latitude Cyclones
Hurricanes Low pressure cyclones Wind Speeds 74 – 150+ MPH Over 350 Miles in Diameter Well defined EYE Most Damage from storm surge
Tornados ---
FQ: Label the fronts on the following diagrams