Weather Alert in Pennsylvania
Severe Thunderstorm Warning issued July 8 at 3:17PM EDT until July 8 at 4:00PM EDT by NWS State College PA
AREAS AFFECTED: Cumberland, PA; Dauphin, PA; York, PA
DESCRIPTION: SVRCTP The National Weather Service in State College PA has issued a * Severe Thunderstorm Warning for... Northeastern Cumberland County in south central Pennsylvania... Southern Dauphin County in south central Pennsylvania... Northwestern York County in south central Pennsylvania... * Until 400 PM EDT. * At 316 PM EDT, a severe thunderstorm was located over Shiremanstown, moving east at 20 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include... Harrisburg, Lower Allen, Hershey, Colonial Park, Progress, Mechanicsburg, Middletown, Camp Hill, Palmyra, New Cumberland, Linglestown, and Enola. This includes the following Interstates... The Pennsylvania Turnpike from mile markers 234 to 256. Interstate 81 from mile markers 58 to 74. Interstate 83 from mile markers 32 to 50. Interstate 283 from mile markers 0 to 2.
INSTRUCTION: Stay inside a well built structure and keep away from windows. Very heavy rainfall is occurring with this severe thunderstorm, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.
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Weather Topic: What are Wall Clouds?
Home - Education - Cloud Types - Wall Clouds
Next Topic: Altocumulus Clouds
A wall cloud forms underneath the base of a cumulonimbus cloud,
and can be a hotbed for deadly tornadoes.
Wall clouds are formed by air flowing into the cumulonimbus clouds, which can
result in the wall cloud descending from the base of the cumulonimbus cloud, or
rising fractus clouds which join to the base of the storm cloud as the wall cloud
takes shape.
Wall clouds can be very large, and in the Northern Hemisphere they generally
form at the southern edge of cumulonimbus clouds.
Next Topic: Altocumulus Clouds
Weather Topic: What are Altostratus Clouds?
Home - Education - Cloud Types - Altostratus Clouds
Next Topic: Cirrocumulus Clouds
Altostratus clouds form at mid to high-level altitudes
(between 2 and 7 km) and are created by a warm, stable air mass which causes
water vapor
to condense as it rise through the atmosphere. Usually altostratus clouds are
featureless sheets characterized by a uniform color.
In some cases, wind punching through the cloud formation may give it a waved
appearance, called altostratus undulatus. Altostratus clouds
are commonly seen with other cloud formations accompanying them.
Next Topic: Cirrocumulus Clouds
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