National Weather Service United States Department of Commerce

Severe weather possible for parts of northern, central Plains and Upper Midwest

The NWS Storm Prediction Center is forecasting a risk of severe thunderstorms Wednesday afternoon and evening for parts of the northern and central Plains and Upper Midwest. The areas at risk include parts of western ND, eastern SD, northeastern NE, southwestern MN and northwestern IA. Large hail and damaging winds will be the main threats, but a tornado or two could occur, as well.
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Hazardous Weather Conditions

Last Update: 842 AM CDT WED AUG 20 2014

View Nearby Observations

Lake Michigan from Sheboygan to Port Washington WI 5NM off shore to Mid Lake

Marine Zone Forecast

WAVES ARE PROVIDED AS A RANGE OF SIGNIFICANT WAVE HEIGHTS...WHICH IS THE AVERAGE HEIGHT OF THE HIGHEST 1/3 OF THE WAVES...ALONG WITH THE AVERAGE HEIGHT OF THE HIGHEST 10 PERCENT OF THE WAVES WHICH WILL OCCASIONALLY BE ENCOUNTERED.

  • SynopsisLOW PRESSURE OF 29.8 INCHES OVER THE GREAT LAKES REGION WILL WEAKEN AS IT MOVES SOUTHEAST INTO THE EASTERN LAKES REGION TONIGHT. WEAK HIGH PRESSURE OF 30.1 INCHES WILL MOVE ACROSS LAKE MICHIGAN THROUGH LATE THIS WEEK...WHILE A SERIES OF LOW PRESSURE SYSTEMS MOVE FROM THE CENTRAL HIGH PLAINS NORTHEASTWARD TO THE UPPER MISSISSIPPI RIVER VALLEY AND WESTERN ONTARIO.
  • Today West winds 5 to 10 kt becoming variable less than 10 kt. Waves 1 ft or less.
  • Tonight Variable winds less than 10 kt becoming southeast 10 to 15 kt. Chance of showers and thunderstorms...especially overnight. Waves 1 to 2 ft.
  • Thursday Southeast winds 10 to 15 kt. Chance of showers and thunderstorms. Waves 1 to 2 ft.
  • Thursday Night South winds 10 to 15 kt. Chance of showers and thunderstorms. Waves 1 to 2 ft.
  • Friday Through Saturday Southwest winds 10 to 15 kt becoming south. Chance of showers and thunderstorms. Waves 1 to 2 ft.
  • Sunday South winds 10 to 15 kt. Slight chance of showers and thunderstorms. Waves 1 to 2 ft.



Additional Forecasts and Information

Zone Area Forecast for Lake Michigan from Sheboygan to Port Washington WI 5NM off shore to Mid Lake
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