Weather Alert in District of Columbia
Flood Watch issued June 30 at 3:28PM EDT until June 30 at 11:00PM EDT by NWS Baltimore MD/Washington DC
AREAS AFFECTED: District of Columbia; Frederick; Carroll; Northern Baltimore; Southern Baltimore; Prince Georges; Anne Arundel; Northwest Montgomery; Central and Southeast Montgomery; Northwest Howard; Central and Southeast Howard; Fairfax; Arlington/Falls Church/Alexandria; Eastern Loudoun
DESCRIPTION: * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of DC, including the following , District of Columbia, Maryland, including the following areas, Anne Arundel, Carroll, Central and Southeast Howard, Central and Southeast Montgomery, Frederick MD, Northern Baltimore, Northwest Howard, Northwest Montgomery, Prince Georges and Southern Baltimore, and northern Virginia, including the following areas, Arlington/Falls Church/Alexandria, Eastern Loudoun and Fairfax. * WHEN...Until 11 PM EDT this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Thunderstorms are expected to develop in the next couple of hours across parts of the Baltimore and Washington metro areas. Storms are expected to be slow movers and be capable of producing intense rainfall rates of 1 to 2 inches per hour, which may result in flash flooding of small streams, creeks, urban and poor drainage areas. - Please visit www.weather.gov/safety/flood for flood safety and preparedness information
INSTRUCTION: You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
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Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
Next Topic: Precipitation
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
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