Weather Alert in Illinois
Severe Thunderstorm Warning issued July 11 at 7:18PM CDT until July 11 at 8:00PM CDT by NWS Quad Cities IA IL
AREAS AFFECTED: Henderson, IL; Warren, IL; Des Moines, IA; Lee, IA
DESCRIPTION: At 718 PM CDT, severe thunderstorms were located along a line extending from near Bald Bluff to Gladstone to near Sawyer, moving east at 40 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. Locations impacted include... Burlington, Fort Madison, Monmouth, West Burlington, Roseville, West Point, Dallas City, Donnellson, Stronghurst, Kirkwood, Middletown, Carman, Biggsville, Gladstone, Terre Haute, Franklin, Raritan, Gulf Port, Little Swan Lake, and Iowa Army Ammunition Plant.
INSTRUCTION: A Tornado Watch remains in effect until 800 PM CDT for west central Illinois...southeastern Iowa...and northeastern Missouri. Torrential rainfall is occurring with these storms, and may lead to flash flooding. Do not drive your vehicle through flooded roadways.
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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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