Weather Alert in Minnesota
Special Weather Statement issued September 4 at 5:05PM CDT by NWS Twin Cities/Chanhassen MN
AREAS AFFECTED: Lac Qui Parle; Chippewa; Kandiyohi; Yellow Medicine; Renville; Redwood; Brown
DESCRIPTION: At 505 PM CDT, Doppler radar was tracking an area of strong thunderstorms extending from 9 miles northeast of Montevideo to 22 miles south of Porter, or extending from 9 miles northeast of Montevideo to 50 miles southwest of Montevideo, moving southeast at 55 mph. HAZARD...Wind gusts up to 50 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Montevideo, Redwood Falls, Granite Falls, Olivia, Clara City, Renville, Hector, Bird Island, Morgan, Walnut Grove, Clarkfield, Lamberton, Wabasso, Sacred Heart, Franklin, Prinsburg, Wood Lake, Morton, Maynard and Hanley Falls.
INSTRUCTION: Monitor the weather situation closely and be alert for threatening weather conditions.
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North America Water Vapor (Moisture)
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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
Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
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