MILWAUKEE (AP) – The National Weather Service has issued a severe thunderstorm watch for much of Wisconsin as storms roll in from Minnesota.  Meteorologist Ed Townsend says the storms are in west-central Wisconsin and should hit Madison by about 8 a.m. Friday. He says they will continue to move south and east, hitting the Milwaukee area later in the morning.  Townsend says the storm system should be out of Wisconsin by Friday afternoon, although there could be sporadic showers.   More storms are expected overnight and into early Saturday. The storms have caused some flash flooding in Minnesota, but Townsend says that’s not expected in Wisconsin. He says heavy downpours are likely, but the storms seem to be weakening as they move east.