Weather Alert in California
Winter Storm Warning issued March 30 at 12:38PM PDT until April 1 at 5:00PM PDT by NWS Medford OR
AREAS AFFECTED: South Central Siskiyou County
DESCRIPTION: * WHAT...For the Winter Storm Warning, heavy snow expected. Total snow accumulations between 1 and 3 feet possible. Winds gusting as high as 50 mph. For the Winter Weather Advisory, snow expected. Total snow accumulations between 2 and 8 inches possible, with up to 12 inches of snow possible at Snowmans Summit. * WHERE...For the Winter Storm Warning, portions of Siskiyou County above 4500 feet, including the Mount Shasta highlands, Medicine Lake, and the Klamath, Salmon, and Trinity mountains, as well as Etna Summit and Scott Mountain Summit. For the Winter Weather Advisory, portions of I-5 south of Weed and Highway 89, including Mount Shasta City, Dunsmuir, and McCloud. * WHEN...For the Winter Storm Warning, from 11 PM this evening to 5 PM PDT Tuesday. For the Winter Weather Advisory, from 11 PM Monday to 5 PM PDT Tuesday. * IMPACTS...Travel could be very difficult to impossible. The hazardous conditions could impact the Monday morning and evening commutes. Strong winds could cause tree damage.
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. Slow down and use caution while traveling. Call 511 or visit quickmap.dot.ca.gov for road information.
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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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