Weather Alert in Minnesota
Winter Storm Watch issued March 12 at 2:52PM CDT until March 16 at 7:00AM CDT by NWS Twin Cities/Chanhassen MN
AREAS AFFECTED: Sherburne; Isanti; Chisago; Lac Qui Parle; Hennepin; Anoka; Ramsey; Washington; Yellow Medicine; Sibley; Carver; Scott; Dakota; Redwood; Brown; Nicollet; Le Sueur; Rice; Goodhue; Watonwan; Blue Earth; Waseca; Steele; Martin; Faribault; Freeborn
DESCRIPTION: ...WINTER WEATHER ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 7 AM CDT FRIDAY... * WHAT...Heavy snow likely. Total snow accumulations in excess of 6" likely, with localized amounts exceeding 12" across southern MN. Winds could gust as high as 45 mph. * WHERE...Portions of central, east central, south central, southeast, southwest, and west central Minnesota. * WHEN...From Saturday evening through Monday morning. * IMPACTS...Travel could be very difficult to impossible. Widespread blowing snow could significantly reduce visibility. The hazardous conditions could impact the Monday morning commute. Gusty winds could bring down tree branches.
INSTRUCTION: Monitor the latest forecasts for updates on this situation.
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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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