Weather Alert in Wisconsin
Winter Storm Watch issued March 13 at 12:34AM CDT until March 16 at 1:00PM CDT by NWS La Crosse WI
AREAS AFFECTED: Clark
DESCRIPTION: ...TWO MAJOR WINTER STORMS OVERNIGHT AND THIS MORNING AND FROM SATURDAY NIGHT INTO MONDAY MORNING... .The first winter storm will move through northern Wisconsin from overnight tonight into this morning. It will bring snow to areas along and north of US Highway 10 in central Wisconsin with expected amounts rising rapidly north of Wisconsin Highway 29. With wind gusts ramping up overnight to 45 to 50 mph by this morning, unsheltered areas will see blowing and drifting snow leading to hazardous driving conditions. Light snow and blowing snow are expected to linger through this morning and then decrease this afternoon. A second winter storm could approach historic levels as a large band of 12 to 18 inches of snow falls across the region with localized amounts up to 24 inches. The main uncertainty in the forecast is exactly where this band sets up with the highest confidence currently from southeast Minnesota to between I-90 and Highway 29 in Wisconsin. There will be a relatively sharp gradient in snow amounts on the southern side of the snow band over northeast Iowa and southwest Wisconsin. In addition to the heavy snow, winds increase Sunday afternoon into Monday morning, with gusts of 35 to 50 mph possible west of the Mississippi River. These winds could lead to widespread blowing and drifting of snow and blizzard conditions, especially west of the Mississippi River. Regardless of exact snow amounts, expect widespread major travel impacts regionwide with some roads possibly becoming impassable. * WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations of 1 to 6 inches. Winds gusting as high as 55 mph. For the Winter Storm Watch, heavy snow possible. Highest total snow accumulations between 12 and 18 inches with localized amounts approaching 24 inches possible. Lesser amounts of 6 to 12 inches of snow possible outside of this band. Winds could gust as high as 40 mph. * WHERE...Clark County. * WHEN...For the Winter Weather Advisory, until 1 PM CDT this afternoon. For the Winter Storm Watch, from Saturday evening through Monday afternoon. * IMPACTS...Travel could be very difficult to impossible. Areas of blowing snow could significantly reduce visibility. The hazardous conditions could impact the Friday morning and evening commutes. Gusty winds could bring down tree branches.
INSTRUCTION: Slow down and use caution while traveling. Visit 511wi.gov for road conditions. Monitor the latest forecasts for updates on this situation.
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Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
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