The severe weather threat will increase this week as a cold front moves across the Plains and Midwest. Damaging winds, large hail and a few tornadoes will all be possible. Hail could be bigger than golf balls on Monday in places like Minneapolis, St. Paul and Sioux Falls. The severe weather risk shifts south Tuesday, putting much of the state of Kansas at risk. Locally heavy rain could also lead to flash flooding as multiple rounds of storms develop over the next few days.