Weather Alert in Pennsylvania

Recent Locations: Reading, PA  

Flash Flood Warning issued July 14 at 4:47PM EDT until July 14 at 8:30PM EDT by NWS State College PA

AREAS AFFECTED: Dauphin, PA; Lancaster, PA; Lebanon, PA

DESCRIPTION: FFWCTP The National Weather Service in State College has extended the * Flash Flood Warning for... Southeastern Dauphin County in south central Pennsylvania... Northwestern Lancaster County in south central Pennsylvania... South Central Lebanon County in south central Pennsylvania... * Until 830 PM EDT. * At 447 PM EDT, local law enforcement reported thunderstorms producing heavy rain in Mount Joy Township. Between 4 and 6 inches of rain have fallen. Additional rainfall amounts of 2 to 3 inches are possible in the warned area. Flash flooding is already occurring. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Law enforcement reported. IMPACT...Life threatening flash flooding of creeks and streams, urban areas, highways, streets and underpasses. * Some locations that will experience flash flooding include... Elizabethtown, Columbia, Lititz, Mount Joy, Manheim, East Petersburg, Cornwall, Salunga-Landisville, Maytown, Rothsville, Mountville, Marietta, Rheems, Bainbridge, Quentin, Timber Hills, Mount Gretna Heights, Lawn, Penryn and Mount Gretna.

INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads.

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Weather Topic: What is Hail?

Home - Education - Precipitation - Hail

Hail Next Topic: Hole Punch Clouds

Hail is a form of precipitation which is recognized by large solid balls or clumps of ice. Hail is created by thunderstorm clouds with strong updrafts of wind. As the hailstones remain in the updraft, ice is deposited onto them until their weight becomes heavy enough for them to fall to the earth's surface.

Hail storms can cause significant damage to crops, aircrafts, and man-made structures, despite the fact that the duration is usually less than ten minutes.

Next Topic: Hole Punch Clouds

Weather Topic: What are Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

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