Forecast Details for Mercer, WI

Recent Locations: Bolingbrook, IL Normal, IL Mercer, WI

Current Alerts for Mercer, WI: Ice Storm Warning

Today: A 30 percent chance of snow after 4pm. Mostly cloudy, with a high near 34. North wind 5 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 15 mph.

Tonight: A chance of freezing rain before 7pm, then a chance of snow between 7pm and 9pm, then freezing rain after 9pm. Low around 27. Breezy, with an east wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New ice accumulation of 0.3 to 0.5 of an inch possible. Little or no snow accumulation expected.

Saturday: Snow, freezing rain, and sleet before noon, then snow, possibly mixed with rain. High near 37. East wind 5 to 10 mph becoming west in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 90%. New ice accumulation of less than a 0.1 of an inch possible. New snow and sleet accumulation of less than a half inch possible.

Saturday Night: A chance of rain and snow before 7pm, then a chance of snow. Mostly cloudy, with a low around 21. Northwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New snow accumulation of less than a half inch possible.

Sunday: Mostly sunny, with a high near 40. Northwest wind around 10 mph, with gusts as high as 20 mph.

Sunday Night: A 30 percent chance of snow, mainly before 1am. Mostly cloudy, with a low around 24. West wind around 5 mph, with gusts as high as 15 mph.

Monday: Snow likely, mainly before 1pm. Mostly cloudy, with a high near 33. Breezy, with a northwest wind 10 to 15 mph, with gusts as high as 25 mph.

Monday Night: Mostly cloudy, with a low around 8. North wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 20 mph.

Tuesday: Mostly sunny, with a high near 38. Calm wind becoming southwest around 5 mph in the afternoon.

Tuesday Night: A chance of snow after 1am. Mostly cloudy, with a low around 25. Breezy, with a south wind 5 to 15 mph, with gusts as high as 20 mph.

Wednesday: A chance of rain and snow. Partly sunny, with a high near 50. Breezy, with a south wind around 15 mph, with gusts as high as 25 mph.

Wednesday Night: A chance of rain and snow. Mostly cloudy, with a low around 30. Southwest wind around 10 mph becoming west after midnight. Winds could gust as high as 20 mph.

Thursday: A chance of rain and snow. Mostly cloudy, with a high near 43. North wind around 10 mph, with gusts as high as 20 mph.

Want more detail? Get the Complete 7 Day and Night Detailed Forecast!

Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

National Weather Forecast--Current

The Current National Weather Forecast and National Weather Map are shown below.

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

North America Water Vapor (Moisture)

This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.

Weather Topic: What is Graupel?

Home - Education - Precipitation - Graupel

Graupel Next Topic: Hail

Graupel is a form of precipitation that is created by atmospheric conditions which cause supercooled water droplets to contact snow crystals and freeze to their surface.

Sometimes known as soft hail or snow pellets, graupel is delicate and easily destroyed by touch. Whereas hail usually falls during severe weather, graupel doesn't require such conditions to form, and can form in mild precipitation similar to situations which produce snowfall.

Next Topic: Hail

Weather Topic: What are Hole Punch Clouds?

Home - Education - Cloud Types - Hole Punch Clouds

Hole Punch Clouds Next Topic: Mammatus Clouds

A hole punch cloud is an unusual occurrence when a disk-shaped hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.

When part of the cloud forms ice crystals, water droplets in the surrounding area of the cloud evaporate. The effect of this process produces a large elliptical gap in the cloud. The hole punch cloud formation is rare, but it is not specific to any geographic area.

Other names which have been used to describe this phenomena include fallstreak hole, skypunch, and cloud hole.

Next Topic: Mammatus Clouds