Weather Alert in Iowa
Red Flag Warning issued March 27 at 3:00AM CDT until March 27 at 9:00PM CDT by NWS Des Moines IA
AREAS AFFECTED: Crawford; Carroll; Greene; Audubon; Guthrie; Dallas; Polk; Cass; Adair; Madison; Warren; Adams; Union; Clarke; Lucas; Taylor; Ringgold; Decatur; Wayne
DESCRIPTION: ...Critical Fire Weather Conditions Expected Friday and Saturday... .Breezy northwest winds, along with cured fuels and low RH values in the 20s, especially over southwest to west central Iowa Friday afternoon to evening will lead to critical fire weather conditions. Saturday will feature even gustier winds, along with lower RH values, warming temperatures and dry fuels will lead to continued critical fire weather conditions. Burning is not recommended. ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY EVENING FOR CRITICAL FIRE WEATHER CONDITIONS FOR SOUTHWEST TO WEST CENTRAL IOWA... * AFFECTED AREA...Parts of southwest to west central Iowa. * WIND...For Friday, Northwest winds at 10-15 mph, gusting to 20-30 mph. For Saturday, Southwest winds at 20-25 mph, gusting to 30-40 mph. * HUMIDITY...For Friday, minimum values of 20-25 percent. For Saturday, minimum values of around 15 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.
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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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