Weather Alert in Alaska
Winter Storm Warning issued February 22 at 9:59AM AKST until February 25 at 6:00AM AKST by NWS Fairbanks AK
AREAS AFFECTED: Upper Chena River Valley; Tanana Flats; Eielson AFB and Salcha; Goldstream Valley and Nenana Hills; Chatanika River Valley; Two Rivers; Fairbanks Metro Area; Nenana; Central Interior
DESCRIPTION: * WHAT...Heavy snow expected. Total snow accumulations between 12 and 18 inches. Winds could gust up to 30 mph. * WHERE...Central Interior, Nenana, Fairbanks North Star Borough * WHEN...Until 6 AM AKST Wednesday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Multiple days of moderate snowfall expected beginning Sunday morning and lasting through Tuesday night. The heaviest snow is expected Monday with lighter snowfall continuing through Tuesday. Westerly winds strengthen through the Tanana Valley Tuesday which may lead to periods of blowing snow. Increased snow on frozen rivers and streams could lead to areas of overflow. Use caution while traveling on and along frozen waterways.
INSTRUCTION: If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Visit 511.alaska.gov or call 5 1 1 for the latest road conditions.
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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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