Weather Alert in Alaska
Cold Weather Advisory issued February 17 at 11:04PM AKST until February 18 at 9:00AM AKST by NWS Juneau AK
AREAS AFFECTED: Municipality of Skagway; Haines Borough and Klukwan; City and Borough of Sitka; City and Borough of Juneau; Western Kupreanof and Kuiu Island; City of Hyder; Annette Island
DESCRIPTION: * WHAT...Dangerously cold wind chill temperatures as low as 0 to 35 below with the coldest wind chills in the north. * WHERE...Klondike Highway, Haines Highway, Juneau, Sitka, Kake, Hyder and Metlakatla. * WHEN...Until 9 AM AKST Wednesday. * IMPACTS...Frostbite and hypothermia are possible if exposed to these temperatures. * ADDITIONAL DETAILS...Occasional gusts to 35 or 40 mph possible around along the Klondike Highway and near Downtown Juneau and Douglas. Coldest wind chills of 20 to 30 below will be along the Haines and Klondike Highways. The other areas will have wind chills of 0 to 10 below.
INSTRUCTION: N/A
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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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