Weather Alert in Alaska
Winter Weather Advisory issued February 19 at 10:59AM AKST until February 20 at 9:00AM AKST by NWS Juneau AK
AREAS AFFECTED: Ketchikan Gateway Borough; Annette Island
DESCRIPTION: ...ACCUMULATING SNOW ACROSS THE PANHANDLE TO END THE WEEK... .A front moving across the gulf has begun to impact the panhandle with snow showers spreading along the outer coast and reaching southward to Petersburg and Wrangell as of 1045 am Thursday. The highest snow accumulations are still expected along the outer coast with orographic enhancement. A secondary batch of heavier showers will develop along the northern panhandle and progress southward as a deformation band associated with the surface low Thursday night into Friday. For inland areas, snow is expected to be light and fluffy in nature due to cold temperatures both aloft and down to the surface. Coastal communities will likely see wetter snow due to slightly warming surface temperatures through the day. * WHAT...Snow expected. Total snow accumulations of 2 to 8 inches. * WHERE...Ketchikan Gateway Borough and Annette Island. * WHEN...From 6 PM this evening to 9 AM AKST Friday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the morning and evening commute. * ADDITIONAL DETAILS...Snow showers will move into the area late Thursday afternoon as a frontal band continues pushing into the panhandle. The heaviest snowfall rates are expected past midnight into Friday morning as the low drifts southward in the gulf and southeasterly winds increase along Dixon Entrance.
INSTRUCTION: Slow down and use caution while traveling. People are urged to prepare their property before the onset of winter weather. For the latest road conditions, where available, call 5 1 1 or visit 511.alaska.gov.
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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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