Weather Alert in Pennsylvania
Winter Storm Watch issued March 16 at 2:28AM EDT until March 18 at 8:00AM EDT by NWS Cleveland OH
AREAS AFFECTED: Southern Erie
DESCRIPTION: * WHAT...Heavy lake effect snow possible. Total snow accumulations between 5 and 9 inches possible. Winds could gust as high as 45 mph. * WHERE...Southern Erie County. * WHEN...From this evening through Wednesday morning. * IMPACTS...Plan on slippery conditions with with slower travel likely The hazardous conditions could impact the Tuesday morning and evening commutes. Gusty winds could bring down tree branches. * ADDITIONAL DETAILS...Rain showers will change to snow showers this afternoon, with bands of locally heavy lake effect snow expected to develop tonight as arctic air moves into the region. The lake effect snow will persist into Tuesday night before gradually tapering off. The snowfall amounts will depend on the placement and duration of the most persistent snow bands. In addition, west winds will continue to gust to 35 to 45 mph at times tonight and Tuesday morning leading to blowing snow and poor visibility where the bands persist.
INSTRUCTION: Monitor the latest forecasts for updates on this situation.
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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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