Weather Alert in Alaska
Special Weather Statement issued May 12 at 1:44PM AKDT by NWS Fairbanks AK
AREAS AFFECTED: Northern Denali Borough; Southern Denali Borough; Eastern Alaska Range North of Trims Camp; Eastern Alaska Range South of Trims Camp
DESCRIPTION: A frontal system from the Bering Sea is bringing rain and much cooler air to the area this afternoon. Snow levels will fall to around 1500 feet through the evening with snow expected down to highway level Monday night into Tuesday morning. There is considerable uncertainty as to how much snow will fall. It is likely that areas from Healy to Cantwell on the Parks Highway and from Donnelly to Isabel Pass on the Richardson Highway will see 1-3 inches, but up to 6 inches remains possible. Elevated areas will likely see the highest amounts. Precipitation will taper off Tuesday afternoon with significant melting expected Wednesday.
INSTRUCTION: N/A
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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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