Weather Alert in Alaska
Winter Weather Advisory issued February 10 at 10:14AM AKST until February 11 at 9:00PM AKST by NWS Fairbanks AK
AREAS AFFECTED: Northwest Arctic Coast; Northern Arctic Coast; Central Beaufort Sea Coast; Eastern Beaufort Sea Coast
DESCRIPTION: * WHAT...Periods of blowing snow expected. Winds gusting as high as 40 mph. * WHERE...Central Beaufort Sea Coast, Eastern Beaufort Sea Coast, Northern Arctic Coast, and Northwest Arctic Coast. * WHEN...From midnight tonight to 9 PM AKST Wednesday. * IMPACTS...Travel may be difficult. Areas of blowing snow could significantly reduce visibility to 1/2 mile or less at times. * ADDITIONAL DETAILS...Easterly winds increase overnight Tuesday and then decrease Wednesday evening and overnight. No falling snow is expected with this event so only snow already on the ground may blow.
INSTRUCTION: Use caution while traveling.
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North America Water Vapor (Moisture)
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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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