After a chilly and dry start to the week, Northern California's weather pattern is about to change. The next winter storm is set to bring major impacts to commuters and holiday travelers by the end of the week with heavy rain,

Winter weather advisories and winter storm warnings go into effect tonight through early Thursday for all of eastern Iowa. Look for snow to develop overnight and become moderate to heavy at times. Confidence is high that this will be an impactful event, with widespread snowfall amounts ranging from 3 to 9 inches.

Winter storm warnings were in place across much of the Great Lakes region on Wednesday, with hazardous travel conditions likely.