Canadian high pressure is settling across the area tonight resulting in mostly clear skies, diminishing winds, and good radiational cooling. Temperatures overnight will drop to unseasonably cool levels into the middle 40's. On Sunday high pressure will shift off to the east allowing a low pressure system over the northern plains to move eastward toward the upper midwest. There will be more clouds on Sunday afernoon than ON Saturday, and some showers may pop up over parts of southern Wisconsin. On Sunday night the warm front will brush by our region to the west, and north central Illinois may get a few sprinkles. The Gulf of Mexico is pretty much blocked off so no appreciable rainfall is expected. Winds will pick up as the pressure gradient tightens on Monday with the system approaching from the west. It will continue to be breezy Monday night and Tuesday with strong low pressure moving to northern Wisconsin, and pulling a cool front across the Stateline. Again precipitation is not expected with the passage of the cool front because of dry air in place across the upper midwest. No significant cool down in anticipated with the passage of the cool front. A pleasant air mass from southern Canada will settle in across the Stateline on Tuesday and Wednesday with daytime highs in the middle to upper 70's, and lows in the low 50's to the low 60's. High pressure will shift off to the east on Thursday allowing a weather system over the plains to begin to have an influence on northern Illinois. Scattered showers and thunderstorms are expected to develop as a warm from approaches the area from the southwest on Thursday. Chances of showers and thunderstorms will continue Friday, Friday night into Saturday morning with the Gulf of Mexico supplying plenty of moisture to the system as a cool front approachs and moves through northern Illinois.
By Meteorologist
Eric Nefstead
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