An approaching storm system is about to throw a wrench into what has been an unusually warm, dry Maine fall, likely dumping more than 3 inches of rain on parts of the state.

The National Weather Service has issued a hazardous weather outlook for all of Maine and New Hampshire, with heavy rainstorms and warm air expected to sweep North along the East Coast from Tuesday through Thursday.

Forecasters expect the heavy rain to reach Maine Tuesday night on the heels of muggy tropical air. The weather service says about 2½ inches will fall at Maine’s southern tip, with totals rising to 3 inches in the Brunswick area. Towns across Central and coastal Maine are expected to see more than 3 inches of rain. Predicted rainfall totals are lower in northern Maine, but some areas could still see more than 2 inches or rain.

It has been dry over the past two months, but the National Weather Service cautions that there’s a small chance of some urban and small stream flooding caused by the sudden heavy rain.

The heavy rain also could bring an early end to Maine’s foliage season, knocking some of the fall colors off the trees.

It’s been an unusually dry fall for across much of the state. Across the Maine coast and Down East, the U.S. Drought Monitor reports moderate drought conditions, with most of Maine’s interior is listed as “abnormally dry.”

Follow Nick McCrea on Twitter at @nmccrea213.