Weather Alert in California
Winter Storm Warning issued April 1 at 1:18PM PDT until April 1 at 11:00PM PDT by NWS Reno NV
AREAS AFFECTED: Lassen-Eastern Plumas-Eastern Sierra Counties
DESCRIPTION: * WHAT...Periods of heavy snow. Additional snow accumulations between 1 and 4 inches west of US 395, including Fredonyer Pass and Yuba Summit, with up to 6 inches at the highest elevations. * WHERE...Lassen-Eastern Plumas-Eastern Sierra Counties. * WHEN...Until 11 PM PDT this evening. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact this evening's commute. Blowing snow could cause reduced visibilities.
INSTRUCTION: If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
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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
Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
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