Weather Alert in Alaska
Winter Weather Advisory issued February 12 at 2:48PM AKST until February 14 at 9:00AM AKST by NWS Anchorage AK
AREAS AFFECTED: Kuskokwim Delta Coast and Nunivak Island; Interior Kuskokwim Delta; Western Capes
DESCRIPTION: * WHAT...Blizzard conditions may continue through 5pm, but conditions are expected to improve quickly this afternoon. A wintry mix is expected Friday and into Saturday with snow eventually becoming rain. * WHERE...Kuskokwim Delta, and Western Capes. * WHEN...From 9 AM Friday to 9 AM AKST Saturday. * IMPACTS...Areas of snow and blowing snow could significantly reduce visibility. Snow becoming rain could make travel very difficult. * ADDITIONAL DETAILS...A complex weather system will move through the region Friday and into Saturday. Friday morning will see snow, followed by rain and snow Friday evening along the coast. After a brief lull in activity, snow and rain will pick up overnight Friday, eventually turning into rain, south of the Kuskokwim river. North of the river, potentially heavy snow may fall with 1 inch an hour rates. Complexity of the weather may mean the dividing line between rain and snow may shift as time continues. Please stay tuned into the forecast for the latest.
INSTRUCTION: Use caution if travel is necessary.
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Weather Topic: What are Cirrus Clouds?
Home - Education - Cloud Types - Cirrus Clouds
Next Topic: Condensation
Cirrus clouds are high-level clouds that occur above 20,000 feet
and are composed mainly of ice crystals.
They are thin and wispy in appearance.
What do they indicate?
They are often the first sign of an approaching storm.
Next Topic: Condensation
Weather Topic: What are Contrails?
Home - Education - Cloud Types - Contrails
Next Topic: Cumulonimbus Clouds
A contrail is an artificial cloud, created by the passing of an
aircraft.
Contrails form because water vapor in the exhaust of aircraft engines is suspended
in the air under certain temperatures and humidity conditions. These contrails
are called exhaust contrails.
Another type of contrail can form due to a temporary reduction in air pressure
moving over the plane's surface, causing condensation.
These are called aerodynamic contrails.
When you can see your breath on a cold day, it is also because of condensation.
The reason contrails last longer than the condensation from your breath is
because the water in contrails freezes into ice particles.
Next Topic: Cumulonimbus Clouds
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