A Wet Weather Pattern Shaping Up For The End Of The Week (Updated 415 PM 8/28)


  • Showers and thunderstorms bring several rounds of potentially heavy rainfall from tonight through Saturday, August 30th. The best chances for this will be Friday night.
  • Localized flooding is possible if these storms move too slowly, or repeatedly move over the same area.  Many parts of southern Wisconsin have received 2 to 4 inches of rain in the last 5 to 8 days.  The ground is already very wet.   
  • Sunday is looking dry at this time.
  • Another round of thunderstorms arrives on Monday, with a strong cold front.  These could be strong thunderstorms.  



Showers and thunderstorms will overspread mainly northern and central Wisconsin tonight into Friday, as the low pressure system moves toward the region.  Some showers and storms will clip southern Wisconsin as well.

Pressure pattern tonight into Friday


Low pressure will then bring a slow moving frontal boundary southeast across the region Friday into Saturday. Showers and thunderstorms are expected at times with these features.

Pressure pattern Saturday



Here is the precipitation total for the state from tonight through Sunday.  Click for a larger view:

Sunday is looking dry for the most par.  A cold front will then push southeast into the area on Monday, and timing is favorable for some of these storms to become strong or even severe during the afternoon.  This is a long way off, so the intensity forecast includes plenty of uncertainty. 

The images below show where the front will be Monday morning, and the amount of rain expected from Sunday night through Monday afternoon.  The rain will continue across the southeast into Monday evening.

Pressure pattern Monday morning



Given all these chances of rain, here is the 5 day total precipitation forecast from the Weather Prediction Center which includes precipitation through Tuesday:

As mentioned at the top of the story, all this rain could lead to localized heavy rainfall and localized flooding, if storms move too slowly or repeatedly move over the same locations. 

Keep up with the forecast, and if you live in a flood prone area, just be ready for action if things start to take shape. 





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