The break from the rain Wednesday afternoon was short-lived as light to moderate rain moved back into northern Illinois and southern Wisconsin. Scattered showers continue to move through west-central Illinois and will move in our direction throughout the night. Rainfall Wednesday night into early Thursday will remain light and under half an inch, but heavier rainfall is possible throughout the day Thursday and Friday.
Low pressure moving into northwest Iowa will shift south of the Stateline, moving through central Illinois Thursday afternoon. Several upper level disturbances will rotate around the low, moving into northern Illinois Thursday morning and afternoon. Moisture levels in the atmosphere remain fairly high and this could lead to periods of heavy rainfall through Friday morning. Rainfall totals could very well end up ranging from one to three inches between Wednesday night and Friday night.
While not as significant as the heavy rain that came down Monday evening, any additional rainfall will fall on already saturated ground and this could lead to flooding in some locations.
Another concern will be the potential for minor flooding along some of the local rivers and creeks. Right now the Pecatonica River at Shirland, the Rock River at Byron and Kishwaukee River at Perryville are under a Flood Warning with the Pecatonica River at Freeport now under a Flood Watch and the Rock River near Rockford and Dixon under a Flood Advisory. If the forecast amount of rain does occur, river flooding may be an issue heading into the weekend.
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