Weather Alert in Pennsylvania
Winter Storm Warning issued February 22 at 2:56AM EST until February 23 at 6:00PM EST by NWS Mount Holly NJ
AREAS AFFECTED: Berks; Lehigh; Northampton
DESCRIPTION: ...POTENTIALLY HISTORIC WINTER STORM WILL IMPACT THE REGION THROUGH MONDAY... .A major winter storm is expected to develop today, impacting the region with very heavy, crippling snowfall and areas of blizzard conditions. Precipitation will develop today, changing to all snow this afternoon and evening. The most severe conditions and heaviest snowfall will occur tonight, with snow gradually tapering off during the daytime Monday. Record breaking snowfall totals are possible. * WHAT...Heavy snow expected. Total snow accumulations between 10 and 20 inches. Winds gusting as high as 40 mph. * WHERE...Berks, Lehigh, and Northampton Counties. * WHEN...From 7 AM this morning to 6 PM EST Monday. * IMPACTS...Travel could be very difficult to impossible. Areas of blowing snow could significantly reduce visibility. The hazardous conditions will impact the Monday morning and evening commutes. Gusty winds could bring down tree branches and result in isolated power outages. * ADDITIONAL DETAILS...Snowfall rates could exceed 2 inches per hour. Locally higher snowfall amounts possible. Blowing and drifting of snow, and whiteout conditions possible.
INSTRUCTION: If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1.
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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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