ES2003_final
12/05/2001
13:40
Page 5
How Does a Mid-Latitude Low Develop into a
Storm System?
1 On which side of the cold front are clouds
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and precipitation generally found?
ES2003
6 How do the surface weather observations
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Clouds develop on the leading edge of the cold front,
compare to the colors indicated on this
satellite image?
and precipitation occurs just behind it.
Blue and purple show more intense weather than pink
and yellow do.
2 On which side of the warm front are clouds
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and precipitation generally found?
A wide band of clouds is found in front of the leading
7 Describe the weather conditions in each of
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the four cities on March 13, 1993 at 1000Z.
edge of the warm front. Precipitation occurs below this
Students describe conditions as indicated on surface
broad band of clouds.
weather data tables.
Example: Asheville: Temperature 30° F, intermittent
snow and fog, visibility 1 mile, wind 14 mph, wind
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3 What additional information would be
helpful in determining the center of the lowpressure system?
direction 340°.
Surface weather observations, especially barometric
pressure, from many locations would show the position
of the low pressure system.
the four cities on March 13, 1993 at 0200Z.
Example: Asheville: Temperature 32° F, snow and fog,
visibility 1 mile, wind 9 mph, wind direction 070°, 2
Temperatures and barometric pressures drop as the
inches of snow on the ground.
storm approaches; wind speeds are high as the storm
weather data tables.
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8 Describe how surface weather conditions
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changed as the storm approached, passed
through, and moved away from these
locations.
Students describe conditions as indicated on surface
arrives and snow falls; barometric pressures rise and
winds die down as the storm passes.
5 What do the barometric pressures for
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Asheville and Concord tell you about the
location of the storm relative to these cities?
9 Based on the pattern of storm movement
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storm center is near; the Concord barometric pressure
and the surface weather data, predict the
satellite image colors over each of these four
cities on March 14, 1993 at 000Z.
is still high, indicating that the storm is not as close.
Asheville-white or yellow; Wilmington-blue, pink, or
Barometric pressure at Asheville is low, indicating the
purple; La Guardia-blue, pink, or purple; Concord-blue,
pink, or purple.
Earth Science
Internet Investigations Guide
71
Teacher’s Guide Chapter 20
Internet Investigation
4 Describe the weather conditions in each of
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