Weather Alert in Pennsylvania
Flood Watch issued June 14 at 2:41AM EDT until June 14 at 4:00PM EDT by NWS State College PA
AREAS AFFECTED: Elk; Cameron; Northern Clinton; Clearfield; Northern Centre; Southern Centre; Southern Clinton; Southern Lycoming; Union; Snyder; Montour; Northumberland; Columbia
DESCRIPTION: * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...A portion of central Pennsylvania, including the following areas, Cameron, Clearfield, Columbia, Elk, Montour, Northern Centre, Northern Clinton, Northumberland, Snyder, Southern Centre, Southern Clinton, Southern Lycoming and Union. * WHEN...Through this afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - A several hour period of moderate to heavy rainfall and possible embedded thunderstorms this morning could produce widespread rainfall amounts of 1 to 2 inches in the Watch area with local amounts exceeding 3 inches. Rainfall rates of 1 to 2 inches per hour could produce flash flooding. - http://www.weather.gov/safety/flood
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 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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