A low pressure weather system that associated with the record amount of rain on Sunday is moving across the area now, and will press eastward ovenight. The thunderstorms have ended, and the showers will end before midnight. Skies will be mostly cloudy overnight, and partly to mostly sunny as a weak bubble of high pressure moves across the area on Monday. Monday will be the day for the pick day of the week. The high temperature will be close to 60 degrees. Enjoy the weather on Monday because the great weather will be short lived, and some major changes will take place dropping temperatures back to wintry levels from Thursday through next weekend. The front moving across northern Illinois will settle east/west across central Illinois on Monday, and stall out there, as a surface low pressure storm center emerges from the Rockies, and intensifies over the northern plains. A low level jet will develop on Monday night from the Texas gulf coast northeastward across the stalled front over central Illinois pumping volumes of moisture toward the Stateline. There will be a chance of showers and thunderstorms during the evening, and showers and thunderstorms will be likely after midnight. It will be windy and raw on Tuesday with more showers and thunderstorms. Showers will persist into Tuesday night, and there are indications that the precipitation will become more scattered on Wednesday as the surface low pulls right across northern Illinois. There is potential of 1" to 2" of new rainfall with this next system, and when added to the rains northern Illinois has received on Sunday, there could be some flooding issues by next Wednesday. On Wednesday night colder air from Canada will be pulled in behind the departing storm system leaving northern Illinois cold through the rest of the week. In fact, high temperatures look like they will only be in the 30's fromThrusday through next Sunday when it should be around 50 degrees this time of year.
By Meteorologist
Eric Nefstead
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