Both the Watertown International Airport and the citys filtration plant recorded high temperatures of 86 degrees Thursday, matching a record set in 1961. The average high for May 15 is 66 degrees, according to the National Weather Service.
But the warmth and sunshine are likely only temporary. Jefferson and Lewis counties, along with much of upstate New York, are under a flash flood watch until 2 a.m. Saturday.
The weather service says 1 to 2 inches of rain are possible during the day today and an additional half to three-quarters of an inch are expected to fall tonight.
Bands of heavy rains, if slow moving, could lead to flash flooding. By tonight excessive runoff will significantly raise water levels in larger creeks and rivers. Some could reach flood stage, the weather service said.
Temperatures will be significantly lower over the weekend, with highs of 68 degrees today, 61 Saturday and 64 Sunday.