Weather Alert in Alaska
Cold Weather Advisory issued February 28 at 2:43PM AKST until March 1 at 11:00AM AKST by NWS Anchorage AK
AREAS AFFECTED: Northern Copper Valley; Western Copper Valley; Central Copper Valley; Ernestine; Southern Copper Valley; Tok Cutoff; McCarthy
DESCRIPTION: * WHAT...Very cold temperatures as low as 45 below zero expected. * WHERE...Copper River Basin. * WHEN...From 1 AM to 11 AM AKST Sunday. * IMPACTS...Frostbite and hypothermia are likely if exposed to these temperatures. * ADDITIONAL DETAILS...Temperatures Sunday morning will be around or a bit colder than what was observed Saturday morning. Localized north to northeast winds gusting to 25 mph will develop near Paxson and along the Tok Cutoff this evening leading to wind chills as low as 50 to 55 below zero.
INSTRUCTION: Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves.
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Weather Topic: What are Wall Clouds?
Home - Education - Cloud Types - Wall Clouds
Next Topic: Altocumulus Clouds
A wall cloud forms underneath the base of a cumulonimbus cloud,
and can be a hotbed for deadly tornadoes.
Wall clouds are formed by air flowing into the cumulonimbus clouds, which can
result in the wall cloud descending from the base of the cumulonimbus cloud, or
rising fractus clouds which join to the base of the storm cloud as the wall cloud
takes shape.
Wall clouds can be very large, and in the Northern Hemisphere they generally
form at the southern edge of cumulonimbus clouds.
Next Topic: Altocumulus Clouds
Weather Topic: What are Altostratus Clouds?
Home - Education - Cloud Types - Altostratus Clouds
Next Topic: Cirrocumulus Clouds
Altostratus clouds form at mid to high-level altitudes
(between 2 and 7 km) and are created by a warm, stable air mass which causes
water vapor
to condense as it rise through the atmosphere. Usually altostratus clouds are
featureless sheets characterized by a uniform color.
In some cases, wind punching through the cloud formation may give it a waved
appearance, called altostratus undulatus. Altostratus clouds
are commonly seen with other cloud formations accompanying them.
Next Topic: Cirrocumulus Clouds
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