Updraft® - Minnesota Weather News

Stormy Friday night; more occasional storms this weekend

Heavy rainfall potential through the weekend

Excessive rainfall outlook
Excessive rainfall outlook Saturday.
National Oceanic and Atmospheric Administration, via Iowa Environmental Mesonet / Iowa State University.

Our tropical air mass is already delivering on a model forecast of locally heavy rainfall this weekend. Thunderstorm clusters blew up in the heat of late aternoon around the greater Twin Cities and eastern Minnesota into Wisconsin.

The slowly moving cells dumped a quick couple inches of rain in parts of our area, causing a local flash flood warning to be issued.

The highest wind reports came in from southeast of the Twin Cities around Hastings, Ellsworth, Wis., and Durand, Wis. Trees are reported down in those areas.

Here are some select storms reports form late Friday.

  • 1 WNW Waconia [Carver Co, MN] NWS Employee reports Hail of penny size (M0.75 Inch) at 4:12 PM CDT --

  • 1 SE Victoria [Carver Co, MN] Trained Spotter reports Hail of half dollar size (M1.25 Inch) at 4:44 PM CDT --

  • 1 S Woodbury [Washington Co, MN] Trained Spotter reports Hail of half dollar size (M1.25 Inch) at 4:53 PM CDT -- Relayed through spotter network.

  • Rogers [Hennepin Co, MN] Trained Spotter reports Hail of quarter size (M1.00 Inch) at 5:02 PM CDT -- Just northeast of I-94 and Highway 101.

  • Eden Valley [Meeker Co, MN] Trained Spotter reports Hail of quarter size (M1.00 Inch) at 5:28 PM CDT --

  • 2 N Brooklyn Park [Hennepin Co, MN] Trained Spotter reports Hail of quarter size (M1.00 Inch) at 5:29 PM CDT --

  • 2 SE Burnsville [Dakota Co, MN] Trained Spotter reports Hail of quarter size (M1.00 Inch) at 6:06 PM CDT --

  • Durand [Pepin Co, WI] Law Enforcement reports Tstm Wnd Dmg at 15 Aug, 5:15 PM CDT -- Few trees down.

  • Hastings [Washington Co, MN] Law Enforcement reports Tstm Wnd Dmg at 15 Aug, 5:20 PM CDT -- Trees and power lines down. Extent unknown.

  • Prescott [Pierce Co, WI] Law Enforcement reports Tstm Wnd Dmg at 15 Aug, 5:25 PM CDT -- Trees and power lines down.

More weekend storms

It won’t rain all the time this weekend, but expect a few waves of storms with the potential for high winds, hail and torrential rainfall.

The National Oceanic and Atmospheric Administration’s Rapid Refresh Forecast System model is typical of many that bring another wave of strong storms across Minnesota overnight into early Saturday morning. The forecast model loop below runs between 5 and 10 a.m. Saturday.

NOAA RRFS model
Rapid Refresh Forecast System model between 5 and 10 a.m. Saturday
NOAA, via Pivotal Weather

Our tropical air mass means storms are capable of multi-inch rainfall in just a short time. There’s a severe weather and and excessive rainfall risk again Saturday. (See the map at the top.)

Highs will be in the steamy 80s between storm waves. It’s a monsoonal summer weekend in Minnesota.