Weather Alert in Minnesota
Flood Warning issued August 22 at 9:51AM CDT by NWS Twin Cities/Chanhassen MN
AREAS AFFECTED: Le Sueur, MN; Scott, MN; Sibley, MN
DESCRIPTION: ...The National Weather Service in the Twin Cities has issued a Flood Warning for the following rivers in Minnesota... Minnesota River at Henderson MN19 affecting Sibley, Le Sueur and Scott Counties. Minnesota River near Jordan affecting Sibley, Scott and Carver Counties. ...Forecast flooding changed from Minor to Moderate severity for the following rivers in Minnesota... Minnesota River at Montevideo affecting Chippewa, Yellow Medicine and Lac qui Parle Counties. .As water from storms over the past few weeks continue to move through the Minnesota River more points will rise above flood stage. Based on current forecasts additional warnings downriver are not anticipated. * WHAT...Minor flooding is forecast. * WHERE...Minnesota River at Henderson MN19. * WHEN...From Saturday afternoon until further notice. * IMPACTS...At 732.5 feet, Water begins encroaching on highway 19 east of Henderson. * ADDITIONAL DETAILS... - At 930 AM CDT Friday, the stage was 731.3 feet. - Forecast...The river is expected to rise above flood stage early tomorrow afternoon and continue rising to a crest of 732.5 feet early Monday morning. - Flood stage is 732.0 feet. - Flood History...This crest compares to a previous crest of 732.6 feet on 09/27/2018.
INSTRUCTION: Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely.
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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.
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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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