Weather Alert in California
Winter Storm Warning issued February 16 at 4:21AM PST until February 19 at 10:00AM PST by NWS Medford OR
AREAS AFFECTED: Western Siskiyou County
DESCRIPTION: * WHAT...Heavy snow expected above 5000 ft through this morning with accumulations of 4 to 8 inches expected. After a brief lull in precipitation this afternoon, snow levels drop to around 1000-1500 ft tonight into Tuesday, and remain low through Thursday. Additional snow accumulations 6 to 12 inches are expected with 2 to 3 ft expected above 5000 ft. Winds gusting as high as 40 mph over high and exposed terrain. * WHERE...In western Siskiyou County, elevations above 5000 ft through Monday morning, lowering all areas Monday evening. This includes all of Highway 96 and 3, and Etna Summit on Sawyers Bar Rd. This also now includes the Klamath River and Scott Valleys, the communities of Happy Camp, Somes Bar, Etna, Greenview, and Callahan. * WHEN...Until 10 AM PST Thursday. * IMPACTS...Travel may be very difficult to impossible. The hazardous conditions could impact the Monday morning and evening commutes. * ADDITIONAL DETAILS...The heaviest snow is expected late tonight into Tuesday morning. 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 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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