Weather Alert in Pennsylvania
Flood Watch issued July 1 at 2:23AM EDT until July 1 at 11:00PM EDT by NWS State College PA
AREAS AFFECTED: Franklin; Dauphin; Lebanon; Cumberland; Adams; York; Lancaster
DESCRIPTION: * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...A portion of central Pennsylvania, including the following counties, Adams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and York. * WHEN...From 2 PM EDT this afternoon through this evening. * IMPACTS...Area creeks and streams are running high and could flood with more heavy rain. * ADDITIONAL DETAILS... - Heavy rain fell over most of the watch area on Monday and Monday night. More thunderstorms are expected later today and early tonight. The wet soils will cause the rain to run off into the already-high streams and creeks. Less than one inch of additional rainfall later today may be enough to cause flash flooding. The greatest risk for flooding is south of the Turnpike. - http://www.weather.gov/safety/flood
INSTRUCTION: You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
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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.
Next Topic: Snow
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.
Next Topic: Stratus Clouds
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