Weather Alert in Pennsylvania
Extreme Cold Warning issued February 6 at 5:05AM EST until February 7 at 12:00PM EST by NWS Cleveland OH
AREAS AFFECTED: Northern Erie; Southern Erie; Crawford
DESCRIPTION: * WHAT...Dangerously cold wind chills as low as 30 below expected. * WHERE...Crawford, Northern Erie, and Southern Erie Counties. * WHEN...From 1 AM to noon EST Saturday. * IMPACTS...The dangerously cold wind chills as low as 30 below zero could cause frostbite on exposed skin in as little as 30 minutes. * ADDITIONAL DETAILS...Wind chill values may drop as low as 15 below zero again late Saturday night into Sunday morning, and additional cold weather advisories may be issued.
INSTRUCTION: Dress in layers including a hat, face mask, and gloves if you must go outside. Keep pets indoors as much as possible. Make frequent checks on older family, friends, and neighbors. Ensure portable heaters are used correctly. Do not use generators or grills inside.
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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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