Weather Alert in Pennsylvania
Flash Flood Warning issued February 20 at 8:43AM EST until February 20 at 11:45AM EST by NWS Pittsburgh PA
AREAS AFFECTED: Armstrong, PA; Butler, PA; Clarion, PA; Venango, PA
DESCRIPTION: FFWPBZ The National Weather Service in Pittsburgh has issued a * Flash Flood Warning for... An Ice Jam Break in... Southern Venango County in northwestern Pennsylvania... Northwestern Armstrong County in west central Pennsylvania... Northeastern Butler County in west central Pennsylvania... Western Clarion County in west central Pennsylvania... * Until 1145 AM EST. * At 843 AM EST, Local law enforcement reported an ice jam on the Allegheny River at Emlenton, PA broke causing flash flooding downstream. HAZARD...Flash flooding from an ice jam break. SOURCE...Law enforcement reported. IMPACT...Flooding of areas near and downstream of the ice jam break. * The nearest downstream town is Foxburg.
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. Stay away or be swept away. River banks and culverts can become unstable and unsafe.
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Weather Topic: What is Evaporation?
Home - Education - Precipitation - Evaporation
Next Topic: Fog
Evaporation is the process which returns water from the earth
back to the atmosphere, and is another crucial process in the water cycle.
Evaporation is the transformation of liquid into gas, and it happens because
molecules are excited by the application of energy and turn into vapor.
In order for water to evaporate it has to be on the surface of a body of water.
Next Topic: Fog
Weather Topic: What are Fractus Clouds?
Home - Education - Cloud Types - Fractus Clouds
Next Topic: Freezing Rain
A fractus cloud (scud) is a fragmented, tattered cloud which has
likely been sheared off of another cloud. They are accessory clouds, meaning they
develop from parent clouds, and are named in a way which describes the original
cloud which contained them.
Fractus clouds which have originated from cumulus clouds are referred to as
cumulus fractus, while fractus clouds which have originated from stratus clouds
are referred to as stratus fractus. Under certain conditions a fractus cloud might
merge with another cloud, or develop into a cumulus cloud, but usually a
fractus cloud seen by itself will dissipate rapidly.
They are often observed on the leading and trailing edges of storm clouds,
and are a display of wind activity.
Next Topic: Freezing Rain
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