Weather Alert in Alaska
Cold Weather Advisory issued March 19 at 2:45PM AKDT until March 20 at 1:00PM AKDT by NWS Anchorage AK
AREAS AFFECTED: Kuskokwim Delta Coast and Nunivak Island; Interior Kuskokwim Delta
DESCRIPTION: * WHAT...Very cold wind chills as low as 45 below expected. * WHERE...Kuskokwim Delta. * WHEN...Until 1 PM AKDT Friday. * IMPACTS...The dangerously cold wind chills as low as 45 below zero could cause frostbite on exposed skin in as little as 10 minutes. Wind chill values can lead to hypothermia with prolonged exposure. * ADDITIONAL DETAILS...Temperatures overnight and in the early morning will see the lowest expected wind chills. Temperatures and wind chills expected to improve during daytime hours, but return to hazardous levels by nighttime and early morning hours. By Friday afternoon, wind chills will warm above hazardous levels. Wind gusts to 35 mph may cause blowing snow where transportable snow on the ground remains.
INSTRUCTION: Use caution while traveling outside. Wear appropriate clothing, a hat, and gloves. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.
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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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