Weather Alert in New York
Extreme Cold Watch issued February 5 at 1:01AM EST until February 8 at 10:00AM EST by NWS Buffalo NY
AREAS AFFECTED: Niagara; Orleans; Monroe; Wayne; Northern Cayuga; Northern Erie; Genesee; Wyoming; Livingston; Ontario; Chautauqua; Cattaraugus; Allegany; Southern Erie
DESCRIPTION: * WHAT...Dangerously cold wind chills as low as 25 below zero possible. The coldest wind chills are expected to be late Friday night through Saturday. * WHERE...Erie, Niagara, Orleans, Monroe, Wayne, Northern Cayuga, Genesee, Wyoming, Livingston, Ontario, Chautauqua, Cattaraugus, and Allegany Counties. * WHEN...From late Friday night through Sunday morning. * IMPACTS...Dangerously cold wind chills as low as 25 below zero could cause frostbite on exposed skin in as little as 15 minutes.
INSTRUCTION: This is a potentially dangerous situation to be outdoors. If you must be outside, be sure to cover all exposed skin. Frostbite can occur in 15 minutes or less with apparent temperatures of 25 below zero or colder.
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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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