Weather Alert in Alaska
Cold Weather Advisory issued February 24 at 3:58PM AKST until February 26 at 6:00PM AKST by NWS Anchorage AK
AREAS AFFECTED: Sutton / Upper Matanuska Valley; Eureka / Tahneta Pass; West Prince William Sound & Whittier; Northern Copper Valley; Western Copper Valley; Central Copper Valley; Ernestine; Northern Susitna Valley; Southern Copper Valley; Tok Cutoff; McCarthy
DESCRIPTION: * WHAT...Dangerously cold wind chills as low as 20 below possible for areas along the coast, including Whittier. Dangerously cold wind chills as low as 40 below to 50 below possible for Copper River Basin, northern Susitna Valley, and Upper Matanuska Valley. * WHERE...Copper River Basin, Sutton, Upper Matanuska Valley, Eureka, Tahneta Pass, West Prince William Sound & Whittier, and Northern Susitna Valley. * WHEN...From 6 PM Wednesday to 6 PM AKST Thursday. * IMPACTS...For areas along the coast, dangerously cold wind chills as low as 20 below zero could cause frostbite on exposed skin in as little as 20 minutes. For interior valleys, wind chills as low as 50 below zero could cause frostbite on exposed skin in as little as 5 minutes. * ADDITIONAL DETAILS...Northerly winds will rapidly strengthen Tuesday evening and Tuesday night, then peak through Wednesday. Winds will then begin to slowly diminish Wednesday night through Thursday. Wind chills as low as 20 to 50 below zero overnight Wednesday night could result in hypothermia or frostbite if precautions are not taken.
INSTRUCTION: A cold weather advisory means that a period of very cold temperatures and wind chills are expected. Wear protective clothing such as a hat, face mask, and heavy gloves or mittens if you have plans to be outdoors. To prevent freezing and possible bursting of outdoor water pipes they should be wrapped, drained, or allowed to drip slowly.
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Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
Weather Topic: What are Stratus Clouds?
Home - Education - Cloud Types - Stratus Clouds
Next Topic: Wall Clouds
Stratus clouds are similar to altostratus clouds, but form at a
lower altitude and are identified by their fog-like appearance, lacking the
distinguishing features of most clouds.
Stratus clouds are wider than most clouds, and their base has a smooth, uniform
look which is lighter in color than a nimbostratus cloud.
The presence of a stratus cloud indicates the possibility of minor precipitation,
such as drizzle, but heavier precipitation does not typically arrive in the form
of a stratus cloud.
Next Topic: Wall Clouds
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