Weather Alert in Wisconsin
Winter Storm Watch issued March 31 at 2:50PM CDT until April 2 at 7:00PM CDT by NWS Twin Cities/Chanhassen MN
AREAS AFFECTED: Polk; Barron; Rusk; St. Croix; Pierce; Dunn; Pepin; Chippewa; Eau Claire
DESCRIPTION: ...MESSY SPRING SYSTEM TO BRING RAIN, FREEZING RAIN, SLEET, AND SNOW TO PORTIONS OF MINNESOTA AND WISCONSIN WEDNESDAY THROUGH THURSDAY... .A strong system is expected to bring a variety of precipitation types to the region Wednesday through Thursday. While there is still some uncertainty in the exact track of the low, a mix of snow and sleet is expected for much of central and western Minnesota. Further to the south and east, sleet and freezing rain will be the primary precipitation type. Some shifts in the track are still anticipated, which will influence the total accumulations of snow, sleet, freezing rain, and rain. * WHAT...Heavy mixed precipitation possible. Total snow accumulations up to two inches, sleet accumulations around 1 inch, and ice accumulations up to two tenths of an inch possible. * WHERE...Barron, Polk, Rusk, Chippewa, Dunn, Eau Claire, Pepin, Pierce, and St. Croix Counties. * WHEN...From Wednesday evening through Thursday evening. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Wednesday evening and Thursday morning commutes.
INSTRUCTION: Monitor the latest forecasts for updates on this situation.
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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
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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