A powerful weather system could bring as much as two inches of rain per hour to Massachusetts on Wednesday. The National Weather Service has issued a flash flood watch for six counties until Thursday morning.
Scattered showers will give way to thunderstorms and 25 mile per hour wind gusts on Wednesday afternoon, the National Weather Service said. Rainy weather is expected to continue Wednesday night.
Heavy rains are expected to enter Southeastern Massachusetts Wednesday morning, moving central and west in the afternoon.
“Periods of showers and embedded thunderstorms are expected Wednesday into Wednesday night with pockets of localized torrential rainfall,’’ forecasters said. “Hourly rainfall rates of 1 to 2 inches per hour will be possible with the strongest storm... The main concern at this time if for mainly urban-type flash flooding.’’