Weather Alert in Pennsylvania
Flash Flood Warning issued July 14 at 5:32PM EDT until July 14 at 9:45PM EDT by NWS Mount Holly NJ
AREAS AFFECTED: Berks, PA; Bucks, PA; Chester, PA; Lehigh, PA; Montgomery, PA
DESCRIPTION: FFWPHI The National Weather Service in Mount Holly has issued a * Flash Flood Warning for... Southeastern Berks County in eastern Pennsylvania... South Central Lehigh County in eastern Pennsylvania... Southwestern Bucks County in southeastern Pennsylvania... Northwestern Chester County in southeastern Pennsylvania... Northwestern Montgomery County in southeastern Pennsylvania... * Until 945 PM EDT. * At 532 PM EDT, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 1.5 and 2.5 inches of rain have fallen. Additional rainfall amounts of 1 to 2 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by thunderstorms. SOURCE...Radar. IMPACT...Flooding of small creeks and streams, urban areas, highways, streets, and underpasses as well as other drainage and low lying areas. * Some locations that may experience flash flooding include... Pottstown, Phoenixville, Coatesville, Downingtown, Birdsboro, Royersford, Parkesburg, Trappe, East Greenville, Honey Brook, Schwenksville and Elverson.
INSTRUCTION: Turn around...don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Move to higher ground now. Act quickly to protect your life. 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. Flooding is occurring or is imminent. It is important to know where you are relative to streams, rivers, or creeks which can become killers in heavy rains. Campers and hikers should avoid streams or creeks. Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely.
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Weather Topic: What are Cumulonimbus Clouds?
Home - Education - Cloud Types - Cumulonimbus Clouds
Next Topic: Cumulus Clouds
The final form taken by a growing cumulus cloud is the
cumulonimbus cloud, which is very tall and dense.
The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although
most commonly they stop growing at an altitude of 6 km.
Even small cumulonimbus clouds appear very large in comparison to other cloud types.
They can signal the approach of stormy weather, such as thunderstorms or blizzards.
Next Topic: Cumulus Clouds
Weather Topic: What is Drizzle?
Home - Education - Precipitation - Drizzle
Next Topic: Evaporation
Drizzle is precipitation in the form of water droplets which are
smaller than raindrops.
Drizzle is characterized by fine, gently falling droplets and typically does not
impact human habitation in a negative way. The exception to this is freezing drizzle,
a condition where drizzle freezes immediately upon reaching earth's surface.
Freezing drizzle is still less dangerous than freezing rain, but can
potentially result in hazardous road conditions.
Next Topic: Evaporation
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