High temperatures Thursday afternoon warmed into the mid and upper 70s with Rockford's high reaching 78 degrees. This was the 'coolest' high temperature since June 11th when the mercury reached 79. The next day we warmed into the low 90s!
High pressure moving through the Great Lakes Thursday afternoon kept skies mostly sunny, but throughout the evening you'll notice a gradual increase in cloud cover. The clouds are the result of our next storm system that'll move through northern Illinois and southern Wisconsin Friday. An increase in both warm air and moisture throughout the day will work to overcome the dry air left behind from Thursday's high-pressure system. Overtime, this will lead to an increase in scattered showers Friday morning and afternoon.
Rain showers remain scattered Friday but as a cold front nears late Friday night, a few scattered thunderstorms will be possible. There is a low risk for an isolated strong storm or two during that time with the potential for strong wind gusts through Saturday morning.
Because of that the Storm Prediction Center has placed all of northern Illinois and southern Wisconsin under a 'marginal risk' for Friday night/Saturday morning.
The cold front will sweep through the region during the morning Saturday, with a few storms possible along the front later in the afternoon. The highest risk for that, however, will be further to our southeast. High pressure moves back in Saturday evening leaving skies dry heading into Sunday.
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