Severe thunderstorms will bring heavy rain, damaging winds to western Mass.

Severe Thunderstorm Watch issued for all of NH until 8 pm Monday

A severe thunderstorm watch was issued at 1:35 p.m. and is in effect until 9 p.m. Sunday.

The flood watch will be in effect from Monday afternoon through Tuesday morning, meteorologists from the weather service's offices in Caribou and Gray said Sunday. These storms will be widespread.

"Due to the tropical nature of the air mass (dew points 70-75) and slow movement of the approaching cold front, in the heaviest of the rain some towns could receive 2" or more leading to flash flooding concern.

Excessive runoff from heavy rainfall could cause flooding on highways, streets, underpasses, and other drainage areas and low lying spots.

Central and southeastern MA are less likely to experience the worst of the weather, although some of the storms may cross over from the west late in the evening, forecasters wrote.

The main threat with the coming thunderstorms is "scattered damaging winds", according to the National Weather Service.

Monday will be one of those rare days where you need to actively monitor the weather, as flash flooding and severe weather are likely for much of New Jersey. One to two inches of rain are expected, with localized areas of 2 to 4 inches. Flash flooding may also be a problem if the same areas get hit multiple times with downpours.

The seacoast will be the last to see the storms. Wind gusts in excess of 60 miles per hour are possible (if not likely) on Monday.

NWS also advises to avoid driving or walking through flooded areas. Between that and the rain, our temperatures will be about 10° cooler than the weekend with highs in the mid to upper 70s Monday afternoon.

Once the storms pass, the rest of the week with be partly sunny with temperatures in the 80s and a chance of showers.

More showers and thunderstorms are expected overnight into Tuesday morning, with a low of about 64.

"There will be a weak front that could induce a shower on Wednesday". Follow him on Facebook or Twitter for the latest forecast and realtime weather updates.

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