6:52PM UPDATE: Light to steady rain continues to move across northern Illinois this evening. Over the next hour some of the showers may begin to lighten up, but a steady and heavier rain will move in closer to 9pm.
Skies were sun-filled Thursday morning and most of Thursday afternoon following widely scattered rain showers late Wednesday night. But now the cloud cover has filled back in, leaving skies mostly cloudy to cloudy with rain beginning to move in from the west and southwest.
These showers are forming along a frontal boundary that'll slowly lift back to the north as weak low pressure moves in from the west. An increase in both moisture and wind will allow the rain to become widespread as it overspreads northern Illinois and southern Wisconsin by 6pm, with pockets of heavier rain expected by 8pm/9pm.
Totals are likely to range between half and three quarters of an inch, but there could be some locations that receive an inch, or more, by Friday morning. Following the heavy rain and flooding from late last week, there is a risk of more localized flooding with Thursday night's rainfall. Especially with the already saturated ground and rivers, creeks, and streams running high. This will raise at least a localized flooding risk tonight.
Most of the rain will be wrapping up by Friday morning but a few lingering showers may still be around through sunrise. High pressure to the north during the afternoon will leave us with a dry Friday but temperatures slightly cooler than what we've felt the last few days. Dry conditions will continue into the start of Saturday, but as another warm front nears the region the chance for a few scattered showers and thunderstorms will be possible during the afternoon, and especially during the evening and overnight.
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