Heavy Rain Possible Before Morning

The pesky old cut off upper low continues to circulate over the Stateline. It is responsible for the cool temperatures, clouds, and showers. Surface low pressure developing over western Kentucky this evening will move rapidly northward, and be located near Chicago before daybreak on Monday. Rain will spread northward overnight, and could become heavy late tonight along with some thunder and lightning. Temperatures will drop off into the middle 40's to near 50 degrees tonight under mostly cloudy skies. On Monday rain showers will be likely, and there could be some isolated thunderstorms in the morning. The models are printing out some surprising precipitation forecasts for the next 2 days with totals between 1" and 1 and one half inches. That is hard to believe, but this weather pattern is highly unusual. It will remain cool with scattered showers, and highs in the 60's through Tuesday. The old upper low is moving so slowly that here could even be a few scattered showers lasting into Wednesday morning. Temperatures will begin to recover, however, with more sunshine. The high on Wednesday will be close to 70 degrees. On Thursday the next cold front will blow across the area from the northern plains. Highs on Thursday will reach the 70's again, and there is a slight chance of showers. Cooler Canadian high pressure will follow in behind the front dropping temperatures back into the 40's at night, and the 60's for afternoon highs. It's a little early to say, but it's possible that under ideal conditions, the overnight low, on Friday night/Saturday morning, could even drop to the mid to upper 30's with a chance of frost. That's pretty far out, and we will fine tune the forecast as the week progresses. Look for a recovery in temperatures into the upper 60's by next Sunday. The 8 to 14 day extended forcast is calling for above average temperatures, and below normal precipitation.