Weather Alert in Virginia
Special Weather Statement issued March 14 at 9:03AM EDT by NWS Charleston WV
AREAS AFFECTED: Dickenson; Buchanan
DESCRIPTION: Lack of recent precipitation, relative humidity values ranging from around 15 to 25 percent and breezy winds with gusts of 15 to 20 mph will result in an increased risk for wildfire spread across the area this afternoon and evening. Any ignition source may quickly get out of control given the gusty winds. For your safety and the safety of others, you are urged to avoid outdoor burning. The Spring fire season for the state of Virginia is from February 15th through April 30. During this time...Virginia law prohibits outdoor burning between the hours of midnight and 4 pm at any location in or within 300 feet of a woodland or brushland area.
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
