Weather Alert in Alaska

Recent Locations: Oak Ridge, NC Keaton, KY Huslia, AK

Winter Weather Advisory issued February 28 at 5:59PM AKST until March 2 at 6:00AM AKST by NWS Juneau AK

AREAS AFFECTED: Prince of Wales Island

DESCRIPTION: ...CENTRAL AND SOUTHERN PANHANDLE SNOW SATURDAY WITH POTENTIAL FOR MORE SNOW SUNDAY... Steady snowfall continues across a majority of the panhandle and will continue as the low moves into the eastern gulf through Saturday night before beginning to diminish. South to southwest winds are causing temperatures to warm over the southern outer coast with precipitation becoming a mix or changing to all rain. Through Saturday night, snow will end on the NW side of the low, from Sitka to Juneau and northward. Moisture will decrease overnight Saturday across the south, but then redevelop on Sunday as another system moves in. The rain/snow line will likely hover in vicinity of Sumner Strait Sunday into Monday with additional heavy snow expected for the Petersburg and Wrangell areas and lighter snow northward. A separate low pressure system looks to affect the region on Tuesday with potential for snow to push northward once again. * WHAT...For the first Winter Weather Advisory, snow. Additional snow accumulations of 1 to 3 inches. For the second Winter Weather Advisory, snow expected. Total snow accumulations of up to 8 inches. * WHERE...Prince of Wales Island. * WHEN...For the first Winter Weather Advisory, until 9 PM AKST this evening. For the second Winter Weather Advisory, from 6 AM Sunday to 6 AM AKST Monday. * IMPACTS...Travel will be difficult. The hazardous conditions could impact the morning commute. * ADDITIONAL DETAILS...Another band of snow is expected to develop along the northern part of the island Sunday. Snowfall beginning Sunday should be limited to the northern part of the island and upper elevation highways. The southern half of the panhandle should see warming and either a rain snow mix with minimal accumulations or straight rain.

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 Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

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

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds