At 2:26 a.m. on Sunday, the National Weather Service issued a flood watch valid from 10 a.m. until Monday 2 a.m. for Niagara, Orleans, Monroe, Wayne, Cayuga, Oswego, Jefferson, Lewis, Erie, Genesee, Wyoming, Livingston, Ontario, Chautauqua, Cattaraugus and Allegany counties.The weather service infor ms, "Flash flooding caused by excessive rainfall is possible." ...read more read less