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