The flash drought that has developed over roughly the western 1/2 of the Midwest continues to worsen. Moderate category drought conditions have increased over western Illinois, with severe category conditions expanding over parts of Missouri north into parts of Wisconsin. The only area that has shown a shrinkage is extreme northeast Illinois where from 1 to 3 inches of rain fell last weekend as a cold front slid down over the area.
The big picture computer models do not really show any widespread relief. It will continue warm and mostly dry. Another weak front will drop over the Midwest Saturday afternoon into Sunday. There will be some scattered storms along the front, especially Sunday over northern Missouri into west central Illinois. Another front will move through Tuesday night into Wednesday with more scattered storms. The problem is that as a whole the center of the country will continue to sit under an upper level ridge into next weekend. Upper level ridges or high pressure provide sinking air which warms as it compresses near the ground.
For the Chicago metro area, more warm and basically dry weather. After a day in the 70s on Thursday, Friday and Saturday we are back into the 80s. A little cool off Sunday, especially near the lake, and warming again Monday. By Tuesday highs look to be in the low 90s. There are small rain chances Saturday night along the weak front, with a little more promising look next Wednesday with another cold front.
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