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 .
NEW : Tornado sirens go off in Minot , but there 's no sign of any twisters . National Weather Service says the Souris River 's crest will be below forecasts . The worst is n't over , though , as rising waters prompted the evacuation of Sawyer , North Dakota . The Souris River has already topped its record crest from 1881 .