Weather Fronts
• The boundary
between 2 air
masses with
different
temperatures
• Brings about a
change in
weather
Warm Front
Passes slowly through an area
Cold Front
Passes quickly through an area…sometimes as fast as 100 km/hr
Stationary Front
Can remain
stalled over
an area for
days
Occluded Front
Website – shows animated process
• http://www.phschool.com/atschool/phsciexp/
active_art/weather_fronts/
Fronts – Another Website
• http://ww2010.atmos.uiuc.edu/(Gh)/guides/
mtr/af/frnts/wfrnt/def.rxml
Assignment
• Complete the Compare and Contrast on page
32 and the worksheets on pages 33-34
Cold Fronts
C
O
M
P
A
R
E
C
O
N
T
R
A
S
T
Warm Fronts
•Both are boundary lines between 2 different air masses.
•Both are formed when a warmer and a cooler air mass meet each other.
•Both leave the temperature of the air different than before they arrived.
•Both involve cloud formation and rain/snow.
•Both create rising air.
•Created when a cooler air mass
overtakes a warmer air mass.
•Warm air rises b/c it is pushed up
by the cool air and b/c it is less
dense.
•Steeply sloping curved line front.
•Heavy rain and wind.
•Passes through quickly.
•Cool, dry, and clear skies after
•Mainly cumulus type clouds
•Created when warmer air mass
overtakes a cooler air mass.
•Warm air rises just b/c it is less
dense.
•Gentle sloping straight lined front.
•Light rain and wind.
•Passes through slowly.
•Warm, humid, and cloudy after.
•Mainly stratus type clouds.
Warm Front ws
Description of a warm front
Answers to worksheet
1.
2.
3.
4.
5.
6.
7.
8.
9.
Warm
Into/toward/over/thru
Less
Cold
Cold
Cools
Front
Front
Cirrus
10. Sky
11. Altostratus
12. Rain
13. Snow
14. Nimbostratus
15. Freezing Rain/hail
16. Sleet
17. Rises/increases/warms
Cold Front ws
Description of a Cold Front
Answers to worksheet
1.
2.
3.
4.
5.
6.
7.
8.
Cold
Slower
Denser/more dense
Up
Air
Vertical
Moist
Rise
9. Thick
10. Slowly
11. 100
12. Long
13. Temperature
14. Winds
15. Thunderstorms
16. Tornadoes