Transcript front

Fronts and
Air Masses
 Look
at the weather conditions outside.
What type of air mass is over Long Island?
 What
 Low
type of front is it causing?
pressure/high pressure?
 What
facts did you use to answer these
questions? (Ex: I looked outside and
noticed….)
Today’s Weather Map
A Body of air that has the same
temperature, humidity, and pressure is
known as a(n)
Air
mass
What are the characteristics of a
high pressure system?
Clear,
cool, dry
What are the characteristics of a
low pressure system?
Warm,
cloudy
wet,
A place where two different
bodies of air collide is called
a ______
front
What type of weather will a
cold front bring?
Heavy
precipitation for
a short time
What type of weather will a
warm front bring?
Light
precipitation
for a long time
Which air mass has the lowest
pressure?
A.
mP
B. mT
C. cT
D. cP
Clue- Write
characteristics of
each mass next to it.
Which air mass has the highest
pressure?
A.
mP
B. mT
C. cT
D. cP
Clue- Write
characteristics of
each mass next to it.
The weather characteristics of an
air mass result primarily from its
________
Geographic
origin
Compare an air mass from
the Gulf of Mexico with and
air mass from Canada
Cold/dry air rushing in and
pushing warm air up explains
a ___________ front
Cold
Weather along most fronts is
usually cloudy with precipitation
because the warm air along most
fronts is usually __________
Rising
and cooling, causing
water vapor to cool,
condense and form clouds.
Label each front
Cold front
Warm front
Stationary front
Occluded front
What are the characteristics of an
anticyclone
 High
Pressure
 Brings cool and dry conditions
 Rotates clockwise
What are the characteristics of
a cyclone
 Brings
warm, cloudy, and humid weather
 Low Pressure
 Travels counter-clockwise
Label the High and Lower
Pressure:
 Compare
the following two air masses:
LOW
HIGH
mT
warm
mP
cool
Why would one maritime
air mass be more moist
than another?
It
stays over the
ocean longer.
Don’t forget to study
for the test using the
review sheet and
your notes!