Sources:
http://www.weatherwizkids.com/wi
nter_storms.htm
Rubric
Blizzards
BY ANDREW
This site gives a good overview of winter weather.
There are some cool graphics which are utilized.
October 2008
http://www.fema.gov/areyouready/
winter.shtm
This site provides definitions to related terms. It is
also the source the map used within
http://www.fema.gov/kids/wntstrm.
htm
Good winter weather site. It provides regional
information too.
http://www.naturalhazards.org/inves
tigate/snow/index.html
Date of publication
This site was the source of the snowplow photo
and related info.
Snow can be fun!
Blizzards
Are
Dangerous!
ded to form
Blizzards
A blizzard is a long-lasting snowstorm with
very strong winds and intense snowfall. You
need three things to have a blizzard; cold
air at the surface, lots of moisture, and lift.
Warm air must rise over cold air.
Map Showing Frequency of
Winter Storms in the United
States
A snowplow works to clear roadways
Blizzards can quickly reduce visibility on
roadways, while their high winds and moisture
combine to quickly reduce body temperatures and
cause frostbite on exposed skin. Drifting can
block roadways, airport runways, and even bury
buildings.
Park following a blizzard
Related Terms
Winter Storm Warning: A winter storm is
occurring or will soon occur in your area.
Blizzard Warning: Sustained winds or
frequent gusts to 35 miles per hour or
greater and considerable amounts of falling
or blowing snow (reducing visibility to less
than a quarter mile) are expected to prevail
for a period of three hours or longer.
Blizzard are most common in the northern lakes region, but most
deadly in the northeast.
Blizzards Can Occur
This chart shows the different types of winter
precipitation. Snow is required fo a blizzard
Anywhere It Snows!
Winter Regions in the U.S.
From the Mid-Atlantic coast to New England—
Classic Storms called Nor-Easter. Low
Pressure forms over Carolina coast and moves
north. The result is blizzard like conditions and
large amounts of snow in densely populated
areas
Gulf Coast and Southeast –The biggest danger
in this region is that people seldom experience
snow and therefore are not prepared.
Car buried in snow from recent blizzard.
Causes
Mainly meteorological
3 things needed to make a blizzard
1, Cold is needed to make snow.
2. Moisture is needed to form clouds
and precipitation
3.For a blizzard to form warm air
must ruse over cold air
Midwest and Plains—Storms develop in
southeast Colorado. Cold air moving south
from Canada combines with moisture coming
north from Gulf of Mexico. Strong winds can
produce wind chills near -70 degrees
Fahrenheit.
From the Rockies to the west coast—Storms
crossing the north Pacific slam into the coast.
As moisture move up into the mountains, snow
closes mountain passes. The risk of
avalanches increases.
Alaska—Strong storms crossing the Bering
see frequently cause coastal flooding. Strong
winds combined with loose snow can cause
blizzard conditions and temperatures reaching
90F below zero!
Ice frequently accumulates on power lines during
a blizzard causing them to fall.