Transcript Weather Maps

Weather Maps
1
Scientists and weather forecasters use weather maps
to help them see weather patterns.
2
They place symbols on the maps to help them see what
is going on with the weather in various parts of the
country.
3
Fronts
• When two air masses that have different
temperatures meet, they don’t mix.
• The boundary, or line, between the two air
masses is called a front.
• Weather along a front is often stormy.
4
A Cold Front symbol shows the edge of a
mass of cool air.
When a cold front comes through, a cold air
mass meets and pushes under a warm air
mass.
5
A Warm Front symbol shows
the edge of a warmer air mass.
The warm air mass pushes up
and over the cold air mass.
6
A Stationary Front means neither the
warm air or the cool air are moving very
much.
Rain can fall for several days along a
stationary front.
7
How many fronts can you identify on this
map?
8
How many fronts can you identify on this
map?
Cold
Warm
Stationary
9
How many fronts can you identify on this
map?
Cold
Warm
Stationary
10
A large “H” means an area of higher pressure.
Higher pressure usually means nice, clear weather.
11
Which state has high pressure?
12
A large “L” means an area of lower
pressure.
Lower pressure usually means clouds, rain, or
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snow.
How many “Lows” are on this map?
14