Weather Alert in Maryland
Flood Watch issued May 21 at 4:35PM EDT until May 22 at 6:00AM EDT by NWS Baltimore MD/Washington DC
AREAS AFFECTED: Extreme Western Allegany; Central and Eastern Allegany; Western Garrett; Eastern Garrett; Western Grant; Western Mineral; Eastern Mineral
DESCRIPTION: * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of western Maryland, including the following areas, Central and Eastern Allegany, Eastern Garrett, Extreme Western Allegany and Western Garrett and eastern West Virginia, including the following areas, Eastern Mineral, Western Grant and Western Mineral. * WHEN...Through late tonight. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - There is increased potential for flooding given saturated soils from last week's major flooding event. The heaviest rains will likely fall through evening. Total amounts of 1 to 3 inches are possible, with locally up to 4 inches if the worst case scenario unfolds. - Please visit www.weather.gov/safety/flood for flood safety and preparedness information.
INSTRUCTION: You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
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Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
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