Weather Alert in Washington
Winter Storm Watch issued March 7 at 9:33PM PST until March 9 at 11:00PM PDT by NWS Seattle WA
AREAS AFFECTED: Cascades of Whatcom and Skagit Counties; Cascades of Snohomish and Northern King Counties
DESCRIPTION: * WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations up to 6 inches. Winds gusting as high as 35 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 12 and 18 inches possible. Winds gusting as high as 40 mph. * WHERE...Cascades of Snohomish and Northern King Counties and Cascades of Whatcom and Skagit Counties. * WHEN...For the Winter Weather Advisory, from 5 AM to 1 PM PDT Sunday. For the Winter Storm Watch, from Sunday afternoon through Monday evening. * IMPACTS...Snow-covered roads may make travel conditions difficult at times through the mountains and cause delays. Temporary road closures possible. Gusty winds may limit visibility at times and down tree branches.
INSTRUCTION: Slow down and use caution while traveling. Prepare for possible power outages. Monitor the latest forecasts for updates on this situation.
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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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