Weather Alert in Pennsylvania
Special Weather Statement issued February 11 at 2:11PM EST by NWS State College PA
AREAS AFFECTED: Warren; McKean; Elk; Clearfield; Cambria; Somerset
DESCRIPTION: Deepening cold and relatively moist air being lifted across the Mountains of Western Pennsylvania will result in fairly persistent light snow late today through Thursday. Snowfall rates will peak at only around one-quarter of an inch per hour for much of the area along and to the east of the Route 219 corridor. However, a few periods of snowfall rates of one half inch per hour or greater will likely occur in the areas of greatest upslope flow, such as the ski areas of the Laurel Highlands and the perennial snowbelt of Northern Warren County. Total snowfall during this 24 to 30 hour period will range from just an inch or two in the valleys near and to the east of Route 219, to as much as 4 or 5 inches along the crest of Laurel Ridge in Somerset County. Roads could become snow covered and slippery tonight and Thursday as temperatures settle into the upper teens to low 20s for the bulk of the time. Use extra caution and allow extra time to reach your destination if you plan to travel.
INSTRUCTION: N/A
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Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
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
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