Wisconsin Flooding From Two Rounds of Thunderstorms

The Northland was under the gun for severe weather today and it started early this morning. The first round of storms developed in South Dakota as hail and damaging winds, but then, these storms fused and turned to a mesoscale convective system of MCS for short. This type of thunderstorm complex is well known for the threat of strong wind gusts. The thunderstorms developed along a stationary front that provided lift, and a strong jet stream, that the thunderstorms tapped into. The storms would bring these winds down to the surface and as a result cause damage.


In Northwest Wisconsin, 60 to 70 mph wind gusts and small hail were reported to the National Weather Service. The line of storms moved into the Northland in Burnett County around 10 and left the Northland around noon.


Behind this severe line of storms, another round of storms formed. The jet stream was transporting moisture from the Gulf of Mexico to the Upper Midwest and the stationary front allowed the moisture to be lifted which helped induce the showers and storms. There was also an area of instability that promoted the growth of the showers and storms over Northwest Wisconsin. All of these parameters coupled together resulted in several hours of thunderstorms training behind one another and resulting in over a half foot of rainfall estimated by radar.


A flash flood warning remains in Sawyer County until 5 am tomorrow morning. The weather looks good tomorrow with sunny skies and temperatures in the 80s. That should help with the drying process and any storm damage restoration needed. The bad news is that we have more severe storms in the forecast.


Meteorologist Gino Recchia

Categories: Weather Blog