Weather Alert in New York
Special Weather Statement issued March 4 at 2:49AM EST by NWS Buffalo NY
AREAS AFFECTED: Niagara; Orleans; Monroe; Wayne; Northern Cayuga; Oswego; Jefferson; Lewis; Northern Erie; Genesee; Wyoming; Livingston; Ontario; Chautauqua; Cattaraugus; Allegany; Southern Erie
DESCRIPTION: Areas of fog will persist across much of the area through early this morning...and will help to maintain existing wet ground conditions. Coupled with temperatures around or a little below freezing...this will allow wet roads, bridges, parking lots, driveways and sidewalks to become icy in spots. If you will be out and about this morning...be careful for black ice and slick spots on area roadways, bridges, overpasses, parking lots, driveways, and sidewalks...particularly where these surfaces have not been treated. The black ice threat will come to an end by mid to late morning as the fog dissipates, road surfaces dry out, and temperatures rise above freezing.
INSTRUCTION: N/A
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North America Water Vapor (Moisture)
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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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