Weather Alert in Iowa
Special Weather Statement issued May 9 at 4:46AM CDT by NWS Sioux Falls SD
AREAS AFFECTED: Lyon; Lincoln; Lyon; Murray; Cottonwood; Nobles; Jackson; Pipestone; Rock; Beadle; Kingsbury; Brookings; Jerauld; Sanborn; Miner; Lake; Moody; Brule; Aurora; Davison; Hanson; McCook; Minnehaha; Douglas; Hutchinson; Turner; Lincoln
DESCRIPTION: Warm and very dry conditions are expected this afternoon, with humidity levels as low as 15 to 25 percent. Coupled with breezy west to northwest winds gusting up to 20-25 mph, fire danger conditions may reach near critical levels. Fire danger will be greatest in localized areas where grasses are still receptive to fire starts and spread. Isolated to scattered light showers during the late afternoon and evening will also bring a potential for isolated gusts up to 40 to 50 mph. This could result in erratic fire behavior. Check with local officials before attempting any outdoor burning today.
INSTRUCTION: N/A
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Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - Mammatus Clouds
Next Topic: Nimbostratus Clouds
A mammatus cloud is a cloud with a unique feature which resembles
a web of pouches hanging along the base of the cloud.
In the United States, mammatus clouds tend to form in the warmer months, commonly
in the Midwest and eastern regions.
While they usually form at the bottom of a cumulonimbis cloud, they can also form
under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds
warn that severe weather is close.
Next Topic: Nimbostratus Clouds
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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