The possibility of heavy rain and strong winds late Sunday afternoon has resulted in a flash flood watch being declared for the Buffalo area.
High temperatures and a humidity expected earlier in the day will boost the heat index into the 90s, according to Shawn Smith, a meteorologist with the National Weather Service in Buffalo.
But that will change dramatically about 5 p.m., when a cold front entering the region is expected to unleash heavy rain, strong winds and even hail in some areas, Smith added.
The average rainfall will be about three-quarters of an inch to an inch, though some areas could get more, Smith said.
The start of the work week will enjoy a retreat from he heat and humidity, with temperatures dropping back into the 70s.