Weather Alert in California
High Surf Advisory High Wind Watch Wind Advisory Winter Storm Watch
Winter Storm Warning issued February 14 at 1:08PM 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 expected above 5000 ft through Monday morning with accumulations of 8 to 12 inches expected. After a brief lull in precipitation Monday afternoon, snow levels drop to around 2000 ft Monday night into Tuesday, remaining low through Thursday. Additional snow accumulations 6 to 12 inches are expected with 1 to 2 ft expected above 5000 ft. Winds gusting 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 10 AM Sunday to 4 AM PST Wednesday. * IMPACTS...Travel may be very difficult to impossible. The hazardous conditions could impact the Monday morning and evening commutes. * ADDITIONAL DETAILS...Snow levels of 5000 feet on Sunday into Sunday evening are expected to lower to 4500 ft Sunday night then down to 4000 ft Monday. There could be a period early Monday morning when precipitation intensity brings snow levels down to Mt Shasta City, resulting in accumulating snow along the I-5 corridor. Snow levels lower further Monday night through Tuesday night down to 2000 ft by Tuesday morning. Visit weather.gov/mfr/winter for additional 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 Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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