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Sunday was a toasty day with temperatures running way above normal. Temperatures were pushing 90° in the Upper Midwest -- about 20 degrees above normal. Monday will be another warm day with temperatures well into the 80s:

Humidity levels will be elevated - it will be feeling muggy and there will be plenty of moisture available for showers and thunderstorms:

This is all ahead of a cold front that arrives Monday afternoon and evening. There will be enough instability for some strong thunderstorms. The front is arriving a little earlier than previously anticipated, so the severe threat has gone up slightly. As of Sunday evening there is a marginal risk (1 our of 5) for severe storms:

Strong winds and large hail would be the main threats, but a brief tornado or two cannot be ruled out either due to some spin in place. But tornadoes are less likely because there will be a line of storms that rolls across with the front. Here's a look at the timing Monday into early Tuesday:

The main risk for severe storms would be around 3 pm in central Iowa until 10 pm around the Mississippi River. Behind the front is going to be a big shot of fall weather.

Tuesday afternoon will be much cooler with temperatures running 10-15 degrees lower:

Humidity will be WAY lower with dew points running over 20 degrees lower than the day before:

That is fall!!! And it continues on Wednesday... temperatures will start off in the morning in the 40s and 50s:

The afternoon will stay nice and refreshing:

The fall-like weather will stick around through the end of the week:

But we may see summer come back next week. For now.. fall is on the way!



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