Weather Alert in California

Recent Locations: Daisy, OK   Gorham, IL   Stevenson Ranch, CA  

Winter Storm Watch issued February 13 at 12:41PM PST until February 18 at 4:00AM PST by NWS Medford OR

AREAS AFFECTED: South Central Siskiyou County; North Central and Southeast Siskiyou County

DESCRIPTION: * WHAT...Heavy snow possible. Total snow accumulations between 8 and 16 inches with up to 2 ft possible above 5000 ft. Winds could gust as high as 40 mph over high and exposed terrain. * WHERE...Southern and eastern Siskiyou County. This includes Highways 97 and 89, Interstate 5 south of Weed, Black Butte Summit, Snowman Summit, Dead Horse Summit, Grass Lake Summit and Mt Shasta Ski Park Road. This also includes the communities of Mt Shasta City, Dunsmuir, McCloud and Tennant. * WHEN...From Sunday evening through late Tuesday night. * IMPACTS...Travel may be very difficult to impossible. The hazardous conditions could impact the Monday morning and evening commutes. * ADDITIONAL DETAILS...Snow levels are expected to lower to 4500 ft Sunday night then down to 4000 ft Monday, but precipitation intensity will likely lower snow levels down to 3500 ft Monday. Snow levels lower further Monday night into Tuesday, possibly as low as 2000 ft by Tuesday morning.

INSTRUCTION: Monitor the latest forecasts for updates on this situation. People should consider delaying travel. If travel is absolutely necessary, drive with extreme caution. Take a winter storm kit with you that includes tire chains, booster cables, flashlight, shovel, blankets and extra clothing. Also take water, a first aid kit, and anything else that would help you survive in case you become stranded.

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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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