Weather Alert in Wisconsin

Recent Locations: Souderton, PA   Bluffton, MN   Mercer, WI  
Current Alerts for Mercer, WI: Winter Storm Watch Winter Weather Advisory

Winter Weather Advisory issued April 1 at 1:59PM CDT until April 3 at 7:00AM CDT by NWS Duluth MN

AREAS AFFECTED: Bayfield; Ashland; Iron

DESCRIPTION: * WHAT...For the Winter Weather Advisory, mixed precipitation expected. Total snow and sleet accumulations between 2 and 4 inches except between 3 and 5 inches for northern Bayfield County and ice accumulations around two tenths of an inch. Winds gusting as high as 35 mph. For the Winter Storm Watch, heavy mixed precipitation possible. Total snow and sleet accumulations up to one inch and ice accumulations around three tenths of an inch possible. * WHERE...Ashland, Bayfield, and Iron Counties. This includes the Tribal Lands of the Red Cliff Band, the northwestern area of the Lac du Flambeau Band and the Bad River Reservation. Other locations including the Apostle Islands National Lakeshore and Madeline Island. * WHEN...For the Winter Weather Advisory, from 1 AM Thursday to 7 AM CDT Friday. For the Winter Storm Watch, from Friday afternoon through Saturday morning. * IMPACTS...Power outages and tree damage are likely due to the ice. Travel could be nearly impossible. The hazardous conditions could impact the Thursday morning and evening commutes. * ADDITIONAL DETAILS...The majority of the snowfall is expected to fall during the daytime hours. With the high sun angle and temperatures hovering just above freezing, snowfall will have a difficult time accumulating on warm surfaces leading to a slushy mess.

INSTRUCTION: Monitor the latest forecasts for updates on this situation. Slow down and use caution while traveling. Call 511 or visit www.511wi.gov for Wisconsin road information.

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Weather Topic: What are Shelf Clouds?

Home - Education - Cloud Types - Shelf Clouds

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

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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