Weather Alert in Ohio
Dense Fog Advisory issued February 16 at 3:19AM EST until February 16 at 11:00AM EST by NWS Pittsburgh PA
AREAS AFFECTED: Tuscarawas; Carroll; Columbiana; Coshocton; Harrison; Jefferson; Muskingum; Guernsey; Belmont; Noble; Monroe; Mercer; Venango; Forest; Lawrence; Butler; Clarion; Jefferson; Beaver; Allegheny; Armstrong; Washington; Greene; Westmoreland; Westmoreland Ridges; Fayette; Fayette Ridges; Indiana; Higher Elevations of Indiana; Hancock; Brooke; Ohio; Marshall; Wetzel; Marion; Monongalia; Ridges of Eastern Monongalia and Northwestern Preston; Preston; Eastern Preston; Western Tucker; Eastern Tucker
DESCRIPTION: * WHAT...Visibility one quarter mile or less in dense fog. Pockets of freezing fog are also expected early this morning, which could create slick spots on roads and sidewalks. * WHERE...Portions of east central Ohio, western Pennsylvania, and northern West Virginia. * WHEN...Until 11 AM EST this morning. * IMPACTS...Low visibility could make driving conditions hazardous. Pockets of freezing fog could also result in a glaze of ice on elevated surfaces and cause slick spots on roads and sidewalks, especially across portions of western Pennsylvania.
INSTRUCTION: If driving, slow down, use your headlights, and leave plenty of distance ahead of you. Slick spots due to ice on roads are also possible in areas of freezing fog.
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Weather Topic: What are Cirrus Clouds?
Home - Education - Cloud Types - Cirrus Clouds
Next Topic: Condensation
Cirrus clouds are high-level clouds that occur above 20,000 feet
and are composed mainly of ice crystals.
They are thin and wispy in appearance.
What do they indicate?
They are often the first sign of an approaching storm.
Next Topic: Condensation
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
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