If not for Gordon, we'd have quite a stretch of above normal mean temperatures (high + low/2). That was the big change-maker this month in a pattern dominated by hot upper ridging. Some locations have had 7 days in the 90s in September. At the Purdue Airport, there have been 5.
I am projecting above normal temperatures right up to Friday & then one above normal day next week with highs well into the 80s as a warm front briefly migrates northward. Otherwise, the majority of the days look a bit below to below normal.
It was another hot one today! After highs yesterday at 86-91, highs today ran 88-94. However, after high humidity the early half of the day, the humidity dropped in the afternoon. It is back up this evening & downright muggy outside!
The sinking air on the back side of Florence contributed to the heat & the drop in humidity this afternoon after a wave of high humidity was pulled in from the east via Florence yesterday.
Few isolated showers approaching our northwestern counties will continue to migrate southeastward. They should diminish/exit over the next few hours.
With a few lingering clouds overnight to tomorrow morning, some patchy shallow fog will develop with lows in the mid 60s.
With upper 80s to lower 90s tomorrow & partly cloudy skies, a few isolated showers & storms are possible as weak cold front passes. Heat indices will run 91-96.
Southwest to west winds will turn to the northwest by evening at 5-10 mph.
As the front migrates back northward Wednesday as a warm front after getting as far south as I-74. A couple isolated showers & storms are possible in our northwestern areas.
Highs will run in the upper 80s to lower 90s with heat indices at 91-97. Northeast/east winds early Wednesday will turn to the southeast & then south with time at 5-10 mph.
There will be multiple rounds of severe weather & flooding rainfall from the Dakotas & Nebraska to Minnesota, Iowa & western/southwestern Wisconsin through Wednesday night.
Thursday looks mostly sunny hot & windy with highs 89-94 & heat indices 93-97. Southwest winds will peak with sustained winds at 15-20 mph with gusts to 32 mph at times in the afternoon.
Note the sustained winds +15 mph in our area projected below with the 20-35 mph SUSTAINED winds in the Plains.
You can also see the area with the severe weather risk Thursday afternoon-evening. This is a severe weather risk parameter highlightning where conditions are favorable should storms develop. Risk will be northwest of us.
Showers/storms are likely Friday. Severe risk is pretty low as the dynamics/shear bypass our area over Michigan to Ontario & New England. Only an isolated random severe storm may occur, it appears at the moment.
Rainfall may return at times for the weekend & then again Tuesday after a dry Monday. This is all courtesy of a front in the area & the remnants of a Texas tropical low & potentially "Rosa" in the Pacific.
After rain/storms late next week after a warm, humid, windy Wednesday, MUCH cooler weather will arrive with the coolest temperatures since April.
Lows in the 30s & 40s are possible with highs in the upper 50s to mid 60s.