Weather Alert in Pennsylvania
Flood Warning issued February 23 at 2:10PM EST by NWS State College PA
AREAS AFFECTED: Dauphin, PA
DESCRIPTION: ...The Flood Warning continues for the following rivers in Pennsylvania... Swatara Creek above Middletown affecting Dauphin County. .An ice jam on the Susquehanna River could cause water and ice to infiltrate the lowlands along the Swatara Creek and adjacent river areas in the vicinity of Middletown. * WHAT...Minor flooding is occurring. * WHERE...Swatara Creek above Middletown. * WHEN...Until further notice. * IMPACTS...At 11.0 feet, Minor overbank flooding begins near the Vine Street Bridge downstream to the Susquehanna River. At 12.0 feet, Both banks overflow upstream of the Vine Street Bridge and several basements are affected. * ADDITIONAL DETAILS... - At 1:30 PM EST Monday the stage was 11.4 feet. - Recent Activity...The maximum creek stage in the 24 hours ending at 1:30 PM EST Monday was 12.2 feet. - Forecast...Ice jam flooding is inherently difficult to predict. Be prepared for rapid changes in creek and river levels depending on ice jam behavior. - Flood stage is 11.0 feet. - Flood History...This crest compares to a previous crest of 12.6 feet on 04/05/2024. - http://www.weather.gov/safety/flood
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov. The next statement will be issued by Tuesday morning.
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Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
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Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
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