Weather Alert in California
Winter Weather Advisory issued April 27 at 1:11AM PDT until April 27 at 11:00AM PDT by NWS Reno NV
AREAS AFFECTED: Greater Lake Tahoe Area; Greater Lake Tahoe Area
DESCRIPTION: * WHAT...Snow. Additional snow accumulation 1 to 3 inches, with up to 4 to 8 inches for higher peaks. Ridge wind gusts up to 50 mph. * WHERE...Greater Lake Tahoe Area. * WHEN...Until 11 AM PDT this morning. * IMPACTS...Snow may produce poor visibility and difficult driving conditions at times in and near the Tahoe basin. Snowfall rates of 1 to 1.5 inches per hour are possible in heavier bands of snow. * ADDITIONAL DETAILS...While snow is less likely to accumulate on roads during the daytime hours, some roads could become snow covered or slushy this morning.
INSTRUCTION: Slow down and use caution while traveling. 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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