Storms will dump rain on the region Tuesday through Wednesday

New Englanders celebrated the unofficial end of summer under blue skies and bright sunshine this weekend, but that will all be gone by Tuesday, according to the National Weather Service.

The Bay State will face heavy rain and thunderstorms thanks to a low pressure system headed this way from the Ohio Valley, said meteorologist Bill Simpson.

Rain will start falling around midnight in the western part of the state and in the Boston area around dawn. The rain will get heavier as the day progesses.

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Simpson said the storms will dump rain on the region Tuesday and Wednesday, amounting to 2 to 3 inches of rain by the time the system passes.

Areas north of the Massachusetts Turnpike and west of Interstate 495 will be hit the hardest, and the heaviest rain will fall late Tuesday night into Wednesday morning.

Even though the sun is shining brightly over Boston right now, cloud cover will increase as the day goes on, and showers will start to appear during the overnight hours, Simpson said.

The clouds should clear by Thursday morning, allowing the sun to arrive just in time for the weekend, Simpson said.