Weather Alert in Alaska
Winter Storm Watch issued February 27 at 11:40AM AKST until March 1 at 6:00AM AKST by NWS Juneau AK
AREAS AFFECTED: Glacier Bay; Eastern Chichagof Island; Cape Fairweather to Lisianski Strait; City and Borough of Juneau; Petersburg Borough
DESCRIPTION: ...POTENTIAL OVERRUNNING SNOW EVENT FOR SUNDAY INTO MONDAY... .Snow showers continue to diminish over the southern and central outer coast into Friday afternoon. Main winter story will be this weekend as cold arctic air is expected to move into the panhandle for the end of the week into next week. With the cold air in place, moisture associated with a low over the Gulf into the Bering Sea is expected to move over the area. With the increased dewpoints approaching and colder air at the surface, snow is expected to fall across the Panhandle. Guidance continues to trend toward the most significant snow falling over the parts of the Central Panhandle that hold onto the cold air longer. There is the potential that this overrunning snow event lasts into the middle to end of next week. This will depend on how long the cold air persists through the Inner Channels. * WHAT...Heavy snow possible. Total snow accumulations of 6 to 12 inches possible. * WHERE...Glacier Bay, Eastern Chichagof Island, Cape Fairweather to Lisianski Strait, City and Borough of Juneau and Petersburg Borough. * WHEN...From Saturday morning through late Saturday night. * IMPACTS...Travel could be very difficult and is discouraged. * ADDITIONAL DETAILS...Another round of snowfall is expected to start Saturday, and could potentially last into the start of next week in some areas, with cold Arctic air in place and warm, moisture rich air moving over.
INSTRUCTION: Monitor the latest forecasts for updates on this situation.
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Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
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
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