Weather Alert in Alaska
Winter Weather Advisory issued February 5 at 4:24PM AKST until February 6 at 7:00AM AKST by NWS Anchorage AK
AREAS AFFECTED: Pribilof Islands
DESCRIPTION: * WHAT...Wintry mix of snow, sleet, and freezing rain expected. Total snow and sleet accumulations up to 2 inches. Total ice accumulations of up to one tenth of an inch of ice. * WHERE...Pribilof Islands. * WHEN...Until 7 AM AKST Friday. * IMPACTS...Travel could be very difficult. Any blowing snow may reduce visibility to as low as one half mile at times. * ADDITIONAL DETAILS...Precipitation will continue as snow this afternoon but transitions to a wintry mix late this evening as temperatures slowly rise closer to freezing. This second round of precipitation will persist overnight through Friday morning.
INSTRUCTION: Slow down and use caution while traveling.
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Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
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
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