Dreary, grey, lousy; anyway you decide to describe our Monday, you're not wrong. Our overcast conditions made for a grey, albeit cooler-than-average, day across the Tri-State. While rainfall avoided much of the region throughout the day, most of us won't be so lucky tomorrow. After seeing a few lingering showers through 7PM or so, dry conditions will settle in overnight as temperatures only dip toward the 70° area-wide.
A warm front lifting north of the region tomorrow morning will allow more heat and humidity to reach the Ohio Valley Tuesday, this will set the stage for further shower and thunderstorm development. Scattered rainfall is expected early on, but a lull in the action late tomorrow morning/early afternoon will help generate another round of thunderstorm activity across Southern Illinois starting around 3PM or 4PM. The cluster is expected to race northeastward and reach the Tri-State between 5PM and 6PM. The last of the significant showers and storms will push east of the region by 10PM.
Some of these storms may produce strong wind gusts in excess of 50 mph and even some broad rotation aloft, giving credence to the possibility of brief tornadoes. As a result the Storm Prediction Center has placed the entire Tri-State under a "1" on the Threat Index for tomorrow afternoon and early evening. It looks as though the rain chances will continue on into our Wednesday and Thursday as well, though without the chance of Severe Weather thankfully.
Rainfall will finally exit the Tri-State Thursday evening as a cold front swings through and ushers a cooler, drier and more comfortable air mass into the Ohio Valley. Friday looks nothing short of perfect - a breezy northerly wind flow accompanied by a cool Canadian air mass will only allow temperatures to reach the mid to upper 70s that day under mostly sunny skies! Even better, Saturday and Sunday look just as pleasant.
The gorgeous weather won't stop there either. If the current model data holds (and that's a big IF), another cold front late Sunday and early Monday of next week may drop the mercury even further. Here's the current forecast for next Monday in the River City: Partly Cloudy - High: 68°, Dew Point: 49°, Low: 47°. Forty. Seven. We haven't felt a temperature that cool since the morning of May 12th when we dipped to 44°. Cross those fingers!
Wear Your Mask.