A Chilly Weekend

Skies will be clearing this evening, and the temperatures will drop as winds diminish to light and variable. A FREEZE WARNING has been issued for the Stateline area counties from 3 am until 8 am on Saturday morning. There will be frost developing after midnight, and the overnight low is expected to be around 30 degrees. High pressure ridging from James Bay in Canada southwest across Wisconsin, Iowa, Kansas, and Oklahoma through western Texas into Mexico will be the main weather maker for the Stateline for the next several days. It will allow for plenty of sunshine on Saturday morning, but skies will become partly cloudy in the afternoon. It will be cool with a high only in the middle 50s. There will be a breeze from the northeast at less than 10 mph. A weak clipper system will try to bust through the ridge on Saturday night and Sunday. It may produce a few meager light showers. It will remain cool on Sunday with a high in the middle 50's again.  The high will regain control on Monday as an intense storm spins up along the New Jersey coast.  So, the northeasterly light breeze will resume, and it will be partly cloudy.  Temperatures will moderate a few degrees, and top out near 60.  The swirling huge storm system out east will retrograde to the west on Tuesday to a position just north of Lake Ontario in southeastern Canada.  The northerly breeze will continue, skies will be partly cloudy, and afternoon temperatures will moderate into the middle 60's.  The pattern will finally become progressive on Tuesday night with the next system lifting a warm front across the plains into western Illinois by 6 am on Wednesday morning.  Scattered showers and thunderstorms will develop on Tuesday night, and become a little more widespread on Wednesday as the system moves across northern Illinois.  The high temperature on Wednesday will be in the middle 60's, which is close to average for this time of year.