Weather Alert in Alaska
High Wind Warning issued February 24 at 3:58PM AKST until February 26 at 9:00AM AKST by NWS Anchorage AK
AREAS AFFECTED: Thompson Pass
DESCRIPTION: * WHAT...North winds 40 to 65 mph with gusts up to 85 mph expected. Wind chills dropping to 45 below Wednesday night. * WHERE...Thompson Pass. * WHEN...From 3 AM Wednesday to 9 AM AKST Thursday. * IMPACTS...High winds may move loose debris, damage property, and cause power outages. Travel will be difficult. Blowing snow due to high winds will reduce visibilities to one half mile or less at times. The dangerously cold wind chills as low as 40 below zero could cause frostbite on exposed skin in as little as 10 minutes. * ADDITIONAL DETAILS...North to northeast winds will rapidly strengthen late Tuesday afternoon through Tuesday night, then peak Wednesday through Wednesday night. As winds first develop, freshly fallen snow will easily blow around, leading to near-blizzard conditions at times. As snow becomes scoured out, visibilities should improve. Winds will very slowly diminish Thursday through Friday.
INSTRUCTION: Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.
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Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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