The 1st Round of Storms is Done.. Wait till Monday Night!

A relatively narrow higher dew point moisture channel has been focused directly into the the Stateline in advance of a slow moving cool front over eastern Iowa by a strong low level jet stream. There have been some areas with moderate amounts of rainfall. There has been some large hail associated with severe thunderstorms moving eastward out of Iowa across the Quad Cities into Whiteside county. Morrison in Whiteside county reported hail to an inch and a half. Muscatine Iowa reported I" hail. As of 9 pm there have been no reports of large hail in the Stateline area counties, and there will not be any severe weather in the area tonight. The showers and are ending from the west, and skies will become partly cloudy after midnight. The cold front will sag toward the southern tip of Illinois by morning, and become stationary briefly before it becomes a warm front, and starts moving back toward the north. With low pressure developing over the plains a strong low level southerly moisture laden jet will develop pumping vast amounts of Gulf air up and over the northward liftting warm front. After an early morning with some sunshine it will quickly cloud over again, and some thunderstorms will spread into areas south and west of the Stateline during the afternoon. As the front continues it's northward movment into northern Illinois on Monday night severe storms will be possible along with heavy rains that will persist through the night into Tuesday morning. On Tuesday it looks like the front will continue lifting off to the north putting our region in warm gulf air with temperatures reaching well above normal into the upper 70's. The front will be nearby, though, so there may be more thunderstoms during the day.

A cold front will slip slowly eastward on Tuesday night renewing the threat of more severe thunderstorms overnight. The storms will finally come to an end early on Wednesday, but showers will linger on Wednesday into Thursday as cooler air settles in.  The high pressure moving into the area mid and late week will be of Pacific origin, so although it will be cooler,  temperatures will still be near or slightly above average Thursday, Friday, and Saturday under mostly sunny skies.
by Meteorologist
Eric Nefstead