Weather Alert in Alaska
Wind Advisory issued August 22 at 11:03PM AKDT until August 24 at 1:00AM AKDT by NWS Fairbanks AK
AREAS AFFECTED: South Slopes Of The Eastern Brooks Range; South Slopes Of The Central Brooks Range; Dalton Highway Summits; White Mountains and High Terrain South of the Yukon River; Upper Chena River Valley; Chatanika River Valley
DESCRIPTION: * WHAT...Southwest winds 20 to 30 mph with gusts up to 45 mph expected. The strongest winds are expected above 2000 feet elevation. * WHERE...Chatanika River Valley, Dalton Highway Summits, South Slopes Of The Central Brooks Range, South Slopes Of The Eastern Brooks Range, Upper Chena River Valley, and White Mountains and High Terrain South of the Yukon River. * WHEN...From 4 AM Saturday to 1 AM AKDT Sunday. * IMPACTS...Gusty winds will blow around unsecured objects and may cause tree damage resulting in a few power outages. * ADDITIONAL DETAILS...These strong winds usher in a prolonged period of rainy weather so hunters and recreationists are encouraged to prepare for rising water levels on rivers and their tributaries.
INSTRUCTION: Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.
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Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
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
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