A severe-thunderstorm watch remains for the entire region until 10 p.m.
The National Weather Service said MetroWest could see scattered severe thunderstorms on Tuesday. Localized flooding is possible where thunderstorms persist. "Damaging winds will be the main threat".
Strong to severe thunderstorms have developed this afternoon across the northern half of the viewing area.
Monday's second round of rain is forecast to last from 2 p.m. until 11 p.m., the weather service said. "When a cold front approaches the state later this afternoon, tapping into the moist and humid air, that's when the storms are expected to take place".
A few of those storms could be strong to severe and are capable of producing small hail. Lows are forecast in the mid to upper 60's along with a ton of humidity. This round of rain with some imbedded thunderstorm activity has the potential to cause more widespread urban and street flooding during Saturday.
News 12 Long Island meteorologist Rich Hoffman said he expected some break of sunshine during midday hours before the rain moves in. Some of the storms could be severe.
TONIGHT - Overcast with Showers or Storms Likely. A large portion of neighboring Rhode Island, Connecticut and NY and also within these areas.
Thursday: Mostly sunny with a high near 87.