Weather Alert in Alaska
Special Weather Statement issued February 25 at 2:30PM AKST by NWS Juneau AK
AREAS AFFECTED: Municipality of Skagway; Haines Borough and Klukwan; Glacier Bay; Eastern Chichagof Island; Cape Fairweather to Lisianski Strait; City and Borough of Sitka; Admiralty Island; City and Borough of Juneau; Petersburg Borough; Western Kupreanof and Kuiu Island; City and Borough of Wrangell
DESCRIPTION: There is an increasing potential for accumulating snow to impact the area starting Saturday and going through the start of next week. Currently, cold air looks to become entrenched in the Inner Channels while moisture is expected to move onshore from the Gulf of Alaska starting this weekend. The highest confidence for snow looks to be around the central panhandle from Wrangell and Petersburg up to the Icy Strait corridor including Juneau. There is some disagreement on the exact location of the heaviest snow which could shift what communities see the most accumulations. Part of this will depend on where the cold air sets up across the Inner Channels. Places that stay south of the colder air will see more rain than snow for precip accumulations. Stay tuned for the latest forecast updates at weather.gov/juneau
INSTRUCTION: N/A
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Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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