Weather Alert in Alaska
Winter Weather Advisory issued March 1 at 6:52AM AKST until March 2 at 9:00AM AKST by NWS Juneau AK
AREAS AFFECTED: City and Borough of Sitka
DESCRIPTION: ...ANOTHER ROUND OF SNOWFALL EXPECTED SUNDAY FOR CENTRAL PANHANDLE... The active weather pattern continues through Sunday as remnants of yesterday's storm continues to dissipate. Split flow will develop as an incoming front stalls across the central panhandle, with cold strong northerly outflow winds developing across the northern inner channels and warmer southerly winds across the southern panhandle. This sets the stage for portions of the central and southern panhandle to see moderate to heavy snowfall by Sunday afternoon through Sunday evening as another surge of moisture pushes into the area. A transition to a rain snow mix is expected through Monday morning with a transition to rain by Monday afternoon as temperatures increase. Main forecast challenge is potential for temperatures to warm up quicker than expected through Sunday night and into Monday morning with the front moving further north, limiting snowfall accumulations. * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches. * WHERE...City and Borough of Sitka and Western Kupreanof Island and Kuiu Island. * WHEN...From noon today to 9 AM AKST Monday. * IMPACTS...Travel could be difficult.
INSTRUCTION: Slow down and use caution while traveling. People are urged to prepare their property before the onset of winter weather. For the latest road conditions, where available, call 5 1 1 or visit 511.alaska.gov.
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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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