Weather Alert in Pennsylvania
Flood Warning issued July 14 at 4:24PM EDT until July 14 at 10:00PM EDT by NWS State College PA
AREAS AFFECTED: Clinton, PA; Columbia, PA; Lycoming, PA; Montour, PA; Northumberland, PA; Sullivan, PA; Union, PA
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall is occurring. * WHERE...A portion of central Pennsylvania, including the following counties, Clinton, Columbia, Lycoming, Montour, Northumberland, Sullivan and Union. * WHEN...Until 1000 PM EDT. * IMPACTS...Numerous roads remain closed due to flooding. Streams are rising again in many areas after a brief fall. Many locations in the warning area will have the water rise as high and even higher than it was earlier today. It will take several hours for all the water from these storms to work through local drainage systems in urban areas. * ADDITIONAL DETAILS... - At 421 PM EDT, gauge reports indicated heavy rain due to thunderstorms. Flooding is already occurring in the warned area. Between 1 and 7 inches of rain have fallen in the past 18 hours. - Additional rainfall amounts up to 1 inch are possible in the warned area. - Some locations that will experience flooding include... Williamsport, Milton, Montoursville, Jersey Shore, Muncy, Watsontown, Hughesville, Montgomery, Duboistown, New Columbia, Allenwood, Buckhorn, Jerseytown, Rohrsburg, Iola, Jamison City, Eyers Grove, Waller, Exchange and Delaware Run. - http://www.weather.gov/safety/flood
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Stay away or be swept away. River banks and culverts can become unstable and unsafe. In hilly terrain there are hundreds of low water crossings which are potentially dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route.
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Weather Topic: What are Cirrus Clouds?
Home - Education - Cloud Types - Cirrus Clouds
Next Topic: Condensation
Cirrus clouds are high-level clouds that occur above 20,000 feet
and are composed mainly of ice crystals.
They are thin and wispy in appearance.
What do they indicate?
They are often the first sign of an approaching storm.
Next Topic: Condensation
Weather Topic: What are Contrails?
Home - Education - Cloud Types - Contrails
Next Topic: Cumulonimbus Clouds
A contrail is an artificial cloud, created by the passing of an
aircraft.
Contrails form because water vapor in the exhaust of aircraft engines is suspended
in the air under certain temperatures and humidity conditions. These contrails
are called exhaust contrails.
Another type of contrail can form due to a temporary reduction in air pressure
moving over the plane's surface, causing condensation.
These are called aerodynamic contrails.
When you can see your breath on a cold day, it is also because of condensation.
The reason contrails last longer than the condensation from your breath is
because the water in contrails freezes into ice particles.
Next Topic: Cumulonimbus Clouds
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