Weather Alert in West Virginia
Special Weather Statement issued March 29 at 2:09AM EDT by NWS Pittsburgh PA
AREAS AFFECTED: Wetzel; Marion; Monongalia; Ridges of Eastern Monongalia and Northwestern Preston; Preston; Eastern Preston; Western Tucker; Eastern Tucker
DESCRIPTION: The risk for wildfire spread is elevated today. Minimum relative humidity values are forecast to drop to around 30%, and southwest wind gusts forecast to reach as high as 20-25 mph. Open burning of any type may be dangerous. Exercise caution if operating any equipment that could create sparks, and keep vehicles off of dry grass. Most dry grasses, dead leaves, and other tree litter could easily ignite and spread fire quickly. Remember, West Virginia regulations make it illegal to burn from 7AM to 5PM from March 1st to May 31st.
INSTRUCTION: N/A
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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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