Weather Alert in Wisconsin
Winter Storm Warning issued April 1 at 2:20PM CDT until April 2 at 12:00PM CDT by NWS Twin Cities/Chanhassen MN
AREAS AFFECTED: Polk; Barron; Rusk; St. Croix; Pierce; Dunn; Pepin
DESCRIPTION: ...MESSY SPRING SYSTEM BRINGS FREEZING RAIN, SLEET, AND SNOWTO PORTIONS OF MINNESOTA AND WISCONSIN TONIGHT THROUGH THURSDAY... .A powerful spring weather system will bring widespread precipitation to the region beginning tonight and lingering through Thursday, with areas of wet snow, freezing rain, sleet, and rain all expected depending on timing and location. Western and central Minnesota will experience mainly slushy wet snow with accumulations of 2 to 4 inches, meanwhile rain is favored in southern and southeastern Minnesota. In between the snow and rain, a messy wintry mix of sleet and freezing rain will result in ice accumulations and slippery travel. There is still a moderate degree of uncertainty regarding ice accumulation amounts, due to temperatures being very close to freezing and a fluctuation of only a degree or two likely having a large impact on final amounts. The greatest impacts from icing and freezing rain will occur over western Wisconsin and portions of east-central to southwestern Minnesota, with accumulations up to a quarter inch in Minnesota and a few tenths of an inch in Wisconsin. Power outages are possible due to icing of power lines in addition to gusty winds, and slippery to impossible travel will occur where ice accumulates. Slow travel from wet slushy snow is expected in western and central Minnesota. * WHAT...Heavy mixed precipitation expected. Total snow accumulations up to one inch, sleet accumulations around three quarters of an inch, and ice accumulations around one quarter of an inch. Winds gusting as high as 30 mph. * WHERE...Barron, Polk, Rusk, Dunn, Pepin, Pierce, and St. Croix Counties. * WHEN...From midnight tonight to noon CDT Thursday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Significant ice accumulation on power lines and tree limbs may cause widespread and long-lasting power outages. Power outages and tree damage are likely due to the ice. Travel could be nearly impossible. The hazardous conditions will impact the Thursday morning commute.
INSTRUCTION: If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Call 5 1 1 or visit 511wi.gov for road conditions. Persons should consider delaying all travel. If travel is absolutely necessary, drive with extreme caution. Consider taking a winter storm kit along with you, including such items as tire chains, booster cables, flashlight, shovel, blankets and extra clothing. Also take water, a first aid kit, and anything else that would help you survive in case you become stranded.
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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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