Weather Alert in Ohio
Special Weather Statement issued February 6 at 8:12PM EST by NWS Pittsburgh PA
AREAS AFFECTED: Columbiana; Mercer; Venango; Forest; Lawrence; Butler; Clarion; Jefferson; Beaver; Armstrong; Indiana; Higher Elevations of Indiana
DESCRIPTION: A arctic cold front will drop across the region during the late evening hours. The front will be accompanied by bands of snow showers, some of which will be moderate to briefly heavy at times. Visibilities of one-half mile or less and wind gusts to 35 MPH are possible in the heavier snow showers. A quick accumulation of one-half to one inch will be possible, especially on untreated surfaces. Snow Squall Warnings may be necessary for the heaviest showers that drop visibility to one- quarter mile or less in heavy, blowing snow. Motorists are urged to use caution while driving this evening. If you encounter heavy snow and very low visibility, slow down and increase the distance between your car and those that surround you. Consider delaying travel until the heavy snow showers have passed.
INSTRUCTION: N/A
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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
Weather Topic: What are Cumulus Clouds?
Home - Education - Cloud Types - Cumulus Clouds
Next Topic: Drizzle
Cumulus clouds are fluffy and textured with rounded tops, and
may have flat bottoms. The border of a cumulus cloud
is clearly defined, and can have the appearance of cotton or cauliflower.
Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall,
becoming cumulus congestus and possibly the even taller cumulonimbus clouds.
When cumulus clouds become taller, they have a greater chance of producing precipitation.
Next Topic: Drizzle
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