Regional weather view.
The main weather story in the Upper Midwest will be a late, short lived, but very strong hot airmass which will start to push into region, Friday. Very hot conditions will arrive in full swing on Thursday, when mid 90 to 100.F temperatures are possible over much of Nebraska, Missouri, Iowa, South Dakota, Southern Minnesota and parts of Southwest Wisconsin. This air mass will not last long as a cold front will already be starting to push in Friday which will bring with it a chance of storms.
Local View.
Locally one of the main stories will also be the short lived heat that’s coming, Wednesday we will
begin to feel the start of the heat and humidity, sunnier skies will allow temperatures to rise into the low to mid 80s with lows in the upper 60s, under partly cloudy to partly sunny skies. It should be dry on Wednesday.
Thursdays Heat Potential
Thursday the entire local area should be south of the warm front and we will be put into the full brunt of the very hot and humid airmass. Skies should stay sunny most or all of the day and with strong southerly breezes gusting to 30MPH most of the area has the chance for Mid 90 degree temps, with heat index values approaching or topping 100.F. Once highs are reached it will be slow to cool down, lows will remain in the upper 70s, making for heat index values staying around 85-90 much of the evening. Because of the shortness of this heat it will not be as much of a problem, but still residents should take it easy on Thursday. Late Thursday relief already comes, a cold front will approach bringing the chance for showers and thunderstorms, some of which these could be strong.
Rochester Metro View.
I am expecting the same in all of the timing of all the events for the Rochester Area, accept highs Wednesday will be in the mid 80s, with lows in the low 70s. For Thursdays extreme heat I would not be surprised if low end upper 90.F temps were reached in Rochester closer to Downtown away from the airport. This would put heat index values around 100.F. Lows Thursday night also have to potential to be near 80.F much of the night, allowing for that high heat index value to stay up longer then that of areas away from the city. It will also be windy on Thursday with gusts gusting 20 to 30MPH. Friday for Rochester will still be on the warmer side, with chances for thunderstorms, These storms chances are not a guarantee, but if they do develop some could be strong. Highs will be in the low 80s with lows in the low 60s.
Wednesday, Warm, Partly Cloudy to Partly Sunny, highs in the low to mid 80s. Wednesday Night, Partly Cloudy, lows in the upper 60s to low 70s.
Thursday, Very Hot and Humid! Mostly Sunny with highs in the mid 90s-upper 90s possible Rochester Metro, heat index values near or over 100.F. Windy with winds gusting 20 to 30MPH Thursday Night, Very Warm, partly cloudy early with lows in the mid to upper 70s. Heat index values remaining above 85.F for much of the night, then Chance of storms late.
Friday, Cooler, breezy, A chance of thunderstorms early, some could be strong, otherwise partly cloudy. Highs in the low to mid 80s. Friday Night, Clearing skies lows in the low 60s.
Looking Ahead
Looking ahead to the weekend Saturday looks fairly nice, then Sunday may bring a good chance of showers and thunderstorms for the local area, some could be heavy. Monday will be downright chilly compared to what we’ve had for weather, it will also be breezy with a chance of showers. Tuesday it dries out and it remains cooler, but with lots of sunshine, this weather last through the 8th of Sept. then September 9th a dry cool front pushes through bringing frost chances to far Northern Minnesota and Northeast Wis. Sunday Sept 11th looks showery and cool, then towards the end of the run it warms up and becomes more stormy. Stay tuned as this is the time of year models become more changeable.