Weather Alert in California
Winter Weather Advisory issued February 16 at 4:21AM PST until February 19 at 10:00AM PST by NWS Medford OR
AREAS AFFECTED: Central Siskiyou County
DESCRIPTION: * WHAT...Snow expected. Total snow accumulations 2 to 5 inches, with 6 to 10 inches expected above 3000 ft. * WHERE...Central Siskiyou County. Including the locations of...Hilt, Klamath River, Yreka, Weed as well as I-5 and portions of Highways 97, 96 and 3. This also includes the following passes or notable locations... Forrest Mountain Summit on state highway 3 at 4100 ft. * WHEN...From 4 AM Tuesday to 10 AM PST Thursday. * IMPACTS...Travel may be very difficult to impossible. The hazardous conditions could impact the Tuesday morning and evening commutes. * ADDITIONAL DETAILS...The heaviest snow is expected tonight into early Tuesday morning. Visit weather.gov/mfr/winter for snow probabilities.
INSTRUCTION: 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 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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