Weather Alert in Nebraska
Special Weather Statement issued August 11 at 3:50PM CDT by NWS Omaha/Valley NE
AREAS AFFECTED: Washington; Douglas
DESCRIPTION: WHAT...Conditions are favorable for the development of weak, brief funnel clouds. This type of funnel cloud is typically harmless, but on rare occasions they briefly touch down and produce wind gusts over 50 mph and some damage. WHERE...Omaha, Bennington, Washington, Kennard and Arlington. WHEN...Ongoing. PREPAREDNESS AND PRECAUTIONARY ACTIONS... If a funnel cloud is spotted, move indoors and report your sighting to the National Weather Service. If a tornado warning becomes necessary, take appropriate action.
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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