Weather Alert in California
Winter Storm Watch issued February 13 at 11:06AM PST until February 18 at 10:00PM PST by NWS Reno NV
AREAS AFFECTED: Greater Lake Tahoe Area; Greater Lake Tahoe Area
DESCRIPTION: * WHAT...Heavy snow. Snow accumulations between 18 to 30 inches in the Tahoe Basin, highest on the west shore, and much of Alpine County. This includes Tahoe City, Homewood, South Lake Tahoe, Carnelian Bay, Hope Valley, and Markleeville. Sierra snow accumulation of 2 to 5 feet. Winds gusting 35 to 45 mph in valleys, with Sierra ridge gusts over 100 mph. * WHERE...Greater Lake Tahoe Area. * WHEN...From Sunday evening through Wednesday evening. * IMPACTS...Travel could be very difficult to impossible with periods of white out conditions. Very strong winds could cause damage to trees and power lines. * ADDITIONAL DETAILS...The highest snowfall rates will be late Monday afternoon through Tuesday afternoon.
INSTRUCTION: Monitor the latest forecasts for updates on this situation. Persons should consider delaying all travel. Motorists should use extreme caution if travel is absolutely necessary.
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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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