More Like November

A sprawling cold Canadian high will be moving into Montana tonight, and in the process clear skies across north central Illinois. With very dry air in place temperatures will plunge after midnight. A Freeze Warning is in effect for north central Illinois from midnight until 8 am on Saturday morning. Frost will develop after midnight, and the temperatures will drop into the upper 20's by daybreak on Saturday. Saturday will be partly cloudy and very chilly for this time of year. High temperatures will be in the upper 40's with a fairly brisk northwesterly breeze adding to the chill. By the way, the average high for this time of year is 67 degrees, So, it will feel more like November on Saturday than early October.  It will freeze again on Saturday night with a low in the upper 20's again.  The high pressure responsible for our chilly weekend weather will be located over the Oklahoma panhandle by 6 am on Sunday morning.  It's influence will be widespread from the Rockies to the east coast, and from the Canadian border to the Gulf of Mexico.  Skies will be sunny in the Rockford area on Sunday. The cool northwesterly breeze will continue, but it will be more gentle, and the afternoon high will reach the low 50's.  On Monday the high will ridge to the east  from Oklahoma, and stateline winds will become southwesterly beginning a short warm up for the mid west.  It will be mostly sunny and warmer on Columbus Day with a high in the low 60's.  On Tuesday temperatures will reach the middle 60's under mostly sunny skies. The next cool front will push to the southeast across northern Illinois on Tuesday afternoon and night bringing a chance of showers to the Stateline.  It will turn cooler on Wednesday with a high in the middle 50's under sunny skies.