Weather Alert in Washington
Winter Weather Advisory issued February 22 at 1:40PM PST until February 23 at 1:00PM PST by NWS Spokane WA
AREAS AFFECTED: Western Chelan County
DESCRIPTION: * WHAT...Snow expected. Total snow accumulations between 2 and 8 inches, including a 40 to 60% chance of 1 inch per hour snowfall rates. * WHERE...Holden Village, Stehekin, and Stevens Pass. * WHEN...From 10 PM this evening to 1 PM PST Monday. * IMPACTS...Winter travel conditions expected, including the Monday morning commute. * ADDITIONAL DETAILS...The highest probabilities for snowfall rates of 1"/hour will be from 2AM and 9AM Monday.
INSTRUCTION: Slow down and use caution while traveling. For the latest travel information in Washington, go to https://wsdot.wa.gov/travel
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Current U.S. National Radar--Current
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North America Water Vapor (Moisture)
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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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