Rain will move into Western Massachusetts early Saturday night and will continue into Sunday.
Some of the heavy downpours on Sunday morning could feature a few rumbles of thunder.
The National Weather Service has issued a Flood Watch for all of Berkshire county as well as for Western Hampden, Western Hampshire and Western Franklin counties through Monday morning.
The rain will taper to showers during the afternoon. Rainfall estimates are running in the 1-2" range with some higher amounts not out of the question.
Temperatures will top out in the upper 60s and low 70s.
The rain will come to an end Sunday night and sunshine returns for Monday with highs on Monday in the upper 70s.