Weather Alert in Pennsylvania
Flood Watch issued June 30 at 12:24PM EDT until June 30 at 10:00PM EDT by NWS Pittsburgh PA
AREAS AFFECTED: Mercer; Venango; Forest; Lawrence; Butler; Clarion; Jefferson; Beaver; Allegheny; Armstrong; Westmoreland; Westmoreland Ridges; Fayette; Fayette Ridges; Indiana; Higher Elevations of Indiana
DESCRIPTION: * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of northwest, southwest, and western Pennsylvania, including the following areas, in northwest Pennsylvania, Forest, Jefferson PA, Mercer and Venango. In southwest Pennsylvania, Beaver, Fayette, Higher Elevations of Fayette, Higher Elevations of Westmoreland and Lawrence. In western Pennsylvania, Allegheny, Armstrong, Butler, Clarion, Higher Elevations of Indiana, Indiana and Westmoreland. * WHEN...Until 10 PM EDT this evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Showers and thunderstorms in a very moist airmass today will be capable of locally heavy rain, potentially up to 1 to 2 inches in an hour, that could lead to flash flooding. This threat will be highest for any areas that see repeated rounds of showers and storms. - 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 Condensation?
Home - Education - Precipitation - Condensation
Next Topic: Contrails
Condensation is the process which creates clouds, and therefore
it is a crucial process in the water cycle.
Condensation is the change of matter from a state of gas into a state of liquid,
and it happens because water molecules release heat into the atmosphere and
become organized into a more closely packed structure, what we might see as
water droplets.
Water is always present in the air around us as a vapor, but it's too small for
us to see. When water undergoes the process of condensation it becomes organized
into visible water droplets. You've probably seen condensation happen before on the
surface of a cold drink!
Next Topic: Contrails
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
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