Weather Alert in Alaska
Winter Weather Advisory issued February 10 at 2:17PM AKST until February 11 at 12:00PM AKST by NWS Juneau AK
AREAS AFFECTED: Municipality of Skagway
DESCRIPTION: ...Accumulating Snow For the Klondike and Haines Highways... .Two rounds of snow are ahead of us. A system moving into the Panhandle Tuesday evening will bring with it a round of wet snow with the possibility of blowing snow for the Klondike Highway. Snowfall totals will be variable, as high winds could result in more reduced visibilities and less actual snow accumulation. After a short break, a storm force system will be moving up into the panhandle late Wednesday night, bringing the next round of more significant snow to the upper elevations of the Klondike Highway and the Haines Highway. Currently expecting around 1 to 2 inches per every 3 hours to persist through Thursday night.. * WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations of up to 5 inches. Winds gusting as high as 55 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations of up to 15 inches possible. Winds could gust as high as 55 mph. * WHERE...Along the Klondike Highway near White Pass. * WHEN...For the Winter Weather Advisory, until noon AKST Wednesday. For the Winter Storm Watch, from late Wednesday night through Thursday evening. * IMPACTS...Travel could be very difficult and is discouraged. Strong winds could cause tree damage. * ADDITIONAL DETAILS...High winds will result in variable snowfall amounts. Blowing snow could result in both reduced visibilities as well as lower snowfall amounts than anticipated..
INSTRUCTION: Slow down and use caution while traveling. Monitor the latest forecasts for updates on this situation. 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 Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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