Low pressure tracking out of the Tennessee Valley today will move in quickly tonight and retreat just as quickly early Friday morning. Showers arrive tonight and may transition to a period of steady rain for several hours before abruptly ending by the morning commute. Areas of fog redevelop late. Low temperatures tonight stay on the mild side, only falling into the low and mid 50s. Light southwest winds, becoming west to northwest by morning.
Friday, as the low pulls away conditions rapidly improve as skies become partly to mostly sunny for the afternoon. It will feel noticeably cooler as gusty west winds reach 25 to 30 mph. Highs in the mid 60s.
Friday night, skies clear out and winds taper off after sunset. Much cooler air arrives as lows fall into the upper 30s and low 40s. Areas of patchy fog develop once again late at night. Winds diminish to less than 10 mph from the west.
The weekend outlook is favorable for outdoor activities as it should be seasonably cool with generally fair skies and light winds. The one fly in the ointment is that a cold front approaches Saturday night and will spread clouds into the area with a chance of a passing shower overnight. On Sunday, clouds erode as the sun returns and it turns even cooler. Highs on Saturday in the mid 60s, then only in the upper 50s to 60 degrees Sunday. Overnight lows Saturday night in the mid 40s, cooler on Sunday night as the mercury falls into the mid 30s in the outlying areas to low 40s in greater Springfield.
High pressure is back by early next week and the week promises to start off cool and dry. Monday will feature a partly cloudy sky, highs only in the upper 50s to 60 degrees and overnight lows that fall into the upper 30s to low 40s.
Another frontal boundary approaches Tuesday. Clouds will be on the increase and there is a chance of a shower by evening. With a southwest flow ahead of the front highs should recover into the mid 60s on Tuesday. Overnight lows in the low to mid 40s.
A major pattern change is bringing much cooler air into the Midwest and Great Lakes. Areas through Minnesota, Wisconsin and upper Michigan may get a touch of snow as well. Although it will not be as cold here the trend will be for below normal temperatures for a good part of next week.