NEW : Tornado sirens go off in North Dakota , but there 's no sign of any twisters . National Weather Service says The Souris River crest will be below forecasts . The worst is n't over , though , as rising waters prompted the evacuation of Sawyer , Sawyer . The clouds indicated a system that could generate tornadoes , but the intent was even more to alert the scores of National Guard , police and other personnel working to address the flooding to seek cover from the coming storm . ` the Souris River 's has already topped its record crest from Monday .
NEW : Tornado sirens go off in North Dakota , but there 's no sign of any twisters . National Weather Service says The Souris River crest will be below forecasts . The worst is n't over , though , as rising waters prompted the evacuation of Sawyer , Sawyer . the Souris River 's has already topped its record crest from Monday .