Weather Alert in Kentucky
Frost Advisory issued April 27 at 10:45PM EDT until April 28 at 9:00AM EDT by NWS Charleston WV
AREAS AFFECTED: Greenup; Carter; Boyd; Lawrence; Perry; Morgan; Athens; Washington; Jackson; Vinton; Meigs; Gallia; Lawrence; Wayne; Cabell; Mason; Jackson; Wood; Pleasants; Tyler; Lincoln; Putnam; Kanawha; Roane; Wirt; Calhoun; Ritchie; Doddridge; Boone; Clay; Braxton; Gilmer; Lewis; Harrison; Taylor; Upshur; Barbour; Northwest Raleigh; Northwest Fayette; Northwest Nicholas; Northwest Webster
DESCRIPTION: * WHAT...Temperatures as low as 33 will result in frost formation. * WHERE...Portions of northeast Kentucky, southeast Ohio, and central, northeast, northern, southeast, southern, and western West Virginia. * WHEN...From 2 AM to 9 AM EDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...Rural valley locations will be most susceptible to frost formation. Subfreezing temperatures could occur in some of the typically coldest valley locations.
INSTRUCTION: Take steps now to protect tender plants from the cold. Additional information can be found at https://www.weather.gov/rlx as well as on our Facebook and Twitter pages.
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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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