Weather Alert in Iowa
Severe Thunderstorm Warning issued April 2 at 1:37PM CDT until April 2 at 2:30PM CDT by NWS Des Moines IA
AREAS AFFECTED: Decatur, IA; Wayne, IA
DESCRIPTION: SVRDMX The National Weather Service in Des Moines has issued a * Severe Thunderstorm Warning for... Eastern Decatur County in south central Iowa... Southern Wayne County in south central Iowa... * Until 230 PM CDT. * At 137 PM CDT, a severe thunderstorm was located near Pleasanton, or 15 miles south of Leon, moving northeast 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... Leon, Corydon, Allerton, Lineville, Garden Grove, Davis City, Clio, Pleasanton, South Lineville, and Nine Eagles State Park.
INSTRUCTION: For your protection move to an interior room on the lowest floor of a building.
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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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