Weather Alert in Washington
Winter Weather Advisory issued February 22 at 2:44PM PST until February 23 at 1:00PM PST by NWS Pendleton OR
AREAS AFFECTED: Upper Slopes of the Eastern Washington Cascades Crest
DESCRIPTION: * WHAT...Snow. Additional snow accumulations up to 14 to 20 inches above 5000 ft. Accumulations of 4 to 8 inches around the Pass Levels. * WHERE...Upper Slopes of the Eastern Washington Cascades Crest. * WHEN...Until 1 PM PST Monday. * IMPACTS...Relatively warmer road surface temperatures will limit the impacts during the daytime hours as snow can melt of the most heavily traveled highways. Periods of moderate to heavy snowfall rates will create slick roads creating very difficult driving conditions at night.
INSTRUCTION: Slow down and use caution while traveling. The latest road conditions can be obtained by visiting the website wsdot.wa.gov/travel.
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Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
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