Weather Alert in California
Winter Weather Advisory issued April 24 at 1:27PM 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. Snow accumulations of 3 to 6 inches above 7000 feet with up to 10 inches along the highest peaks. 1 to 3 inches at lake level. Ridge winds gusts up to 60 mph. * WHERE...Greater Lake Tahoe Area. * WHEN...From 5 PM Friday to 11 AM PDT Sunday. * IMPACTS...Travel could be difficult at times. The hazardous conditions could impact the Friday evening commute and weekend travel, especially across Sierra passes. * ADDITIONAL DETAILS...Heaviest snowfall expected Friday night and Saturday morning. Snow will struggle to accumulate on roadways during the daytime hours, though isolated heavy snow showers may bring greater accumulations Saturday afternoon.
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 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
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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