Weather Alert in Alaska
Winter Storm Warning issued March 18 at 1:05PM AKDT until March 20 at 1:00AM AKDT by NWS Juneau AK
AREAS AFFECTED: Cape Fairweather to Lisianski Strait
DESCRIPTION: ...HIT OR MISS SNOW SHOWERS CONTINUE THROUGH THE WEEK... .Snow showers from the Gulf of Alaska will continue through Friday morning at least. Snowfall accumulations of 7 to 16 inches are expected through Friday, with some locally higher amounts possible. A more organized area of showers is expected to impact the NE gulf coast on Thursday bringing more intense snow falls which has prompted the addition of winter storm warnings for Yakutat and Pelican. However, accumulations will be limited during the daytime due to warmer temperatures as we are now into the latter half of March. In addition, snowfall accumulations will be widely variable across the area due to the hit or miss nature of the showers, however rates as high as 1 inch per hour and visibilities down to 1/2 mile or less will be possible within any heavier showers that repeatedly move over the same location. Advisories could be upgraded to short-fuse Winter Storm Warnings if heavier snow showers continue over the same area. A relative lull in the heaviest showers is likely for some areas on Friday, but more snow may sweep into the panhandle for the weekend. * WHAT...Heavy snow. Additional snow accumulations of 8 to 13 inches. Visibilities reduced to 1/2 mile or less at times. * WHERE...Cape Fairweather to Lisianski Strait. * WHEN...Until 1 AM AKDT Friday. * IMPACTS...Travel will be difficult. * ADDITIONAL DETAILS...Heaviest snow showers are expected from early Thursday morning into Thursday night. Amounts could be highly variable.
INSTRUCTION: If you must travel, keep an extra flashlight, food, and water with you in case of an emergency. People are urged to prepare their property before the onset of winter weather.
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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
Weather Topic: What are Cumulus Clouds?
Home - Education - Cloud Types - Cumulus Clouds
Next Topic: Drizzle
Cumulus clouds are fluffy and textured with rounded tops, and
may have flat bottoms. The border of a cumulus cloud
is clearly defined, and can have the appearance of cotton or cauliflower.
Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall,
becoming cumulus congestus and possibly the even taller cumulonimbus clouds.
When cumulus clouds become taller, they have a greater chance of producing precipitation.
Next Topic: Drizzle
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