Weather Alert in California
Winter Storm Warning issued February 21 at 3:56AM PST until February 22 at 4:00PM PST by NWS Medford OR
AREAS AFFECTED: Western Siskiyou County; South Central Siskiyou County; North Central and Southeast Siskiyou County
DESCRIPTION: * WHAT...Heavy snow expected Above 4500 feet in Siskiyou County. Total snow accumulations 5 to 10 inches. South to southeast winds gusting as high as 60 mph over high and exposed terrain. * WHERE...Above 4500 feet in Siskiyou County. This includes the locations of...Bray and Tennant. This also includes the following passes or notable locations...Dead Horse Summit on State Highway 89 at 4489 ft, Etna Summit on Sawyers Bar Rd at 5950 ft, Mt. Shasta ski park highway around 5400 ft, Grass Lake at Mt. Hebron at 5291 ft and Bunny Flat on Everitt Memorial highway at 6900 ft. * WHEN...From 10 PM this evening to 4 PM PST Sunday. * IMPACTS...Travel may be very difficult to impossible. Strong winds could cause tree damage. * ADDITIONAL DETAILS...The heaviest snow is expected late tonight through Sunday morning. Snow levels begin to rise during Sunday afternoon, shortly before snow tapers off. Visit weather.gov/mfr/winter for snow probabilities.
INSTRUCTION: If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 511 or visit quickmap.dot.ca.gov for road information.
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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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