Weather Alert in Washington

Recent Locations: Auburn, NE   Montesano, WA  
Current Alerts for Montesano, WA: Hydrologic Outlook Wind Advisory

Blizzard Warning issued March 10 at 2:37AM PDT until March 12 at 5:00AM PDT by NWS Seattle WA

AREAS AFFECTED: Cascades of Southern King County; Cascades of Pierce and Lewis Counties

DESCRIPTION: * WHAT...For the Winter Weather Advisory, snow. Additional snow accumulations between 12 and 22 inches. For the Blizzard Warning, blizzard conditions expected. Winds gusting as high as 40 mph with an additional 10 to 15 inches of snow. For the Winter Storm Watch, heavy snow possible late Wednesday night through late Friday night. * WHERE...Cascades of Pierce and Lewis Counties and Cascades of Southern King County. * WHEN...For the Winter Weather Advisory, until 6 PM PDT Wednesday. For the Blizzard Warning, from 6 PM Wednesday to 5 AM PDT Thursday. For the Winter Storm Watch, from late Wednesday night through late Friday night. * IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow. Travel could be very difficult to impossible.

INSTRUCTION: Travel should be restricted to emergencies only. If you must travel, have a winter survival kit with you. If you get stranded, stay with your vehicle. Prepare for possible power outages. 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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Current U.S. National Radar--Current

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Weather Topic: What are Cirrus Clouds?

Home - Education - Cloud Types - Cirrus Clouds

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

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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