Last night was one of the more uncomfortable nights of the summer as temperatures only fell into the mid 70s. Dew points weren't too far off. In fact, values this morning are similar to values being observed across the state of Florida, mid 70s. Gross.
Triple-digit heat indices are on the table once again for our Thursday. However, the potential for some relief is a little bit higher today as our next cold front slides in from the northwest. This could bring us two chances for storms, one late in the morning and one towards the evening drive. The evening bout would all depend on the cold front's timing.
If the cold front is slower and we do see development along the cold front closer to the Illinois-Wisconsin border, severe and excessive rainfall potential would be slightly higher. If the cold front is slightly faster than modeled and pushes through earlier, then the risk would be higher to our south and east. Right now, the Storm Prediction Center has the entire area under a level 1 of 5 for damaging winds.
At the same time, the Weather Prediction Center has us under a level 2 Slight Risk for excessive rainfall. With the amount of moisture in our atmosphere, thunderstorms would be able to produce rainfall rates at or above 1", making flash flooding a concern. Thunderstorm chances should wane into the night as the cold front pushes away and slides into the central portions of Illinois. This would leave us with a decent amount of cloud cover into Friday morning with overnight lows dropping into the low 70s.
This active and warm weather pattern is set to carry on into the last weekend of July. Ridging to the south will keep temperatures above average, getting back to the 90
° mark Sunday and Monday. Storm chances are best Saturday as a quick-moving low pressure system aims to track into Wisconsin.
Similar to today, the Storm Prediction Center has the entire area under a level 1 Marginal Risk.
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