The National Weather Service has issued a coastal flood advisory because of an astronomically high tide at midday and persistent easterly flow of weather off the Gulf of Maine.

The advisory means there could be nuisance flooding along the coast, such as at the wharfs in Portland and Granite Point Road in Biddeford, the weather service said. A high tide of more than 11 feet will occur at 11:30 a.m. in Portland.

The advisory is in effect until 1 p.m.

Heavy snow was forecast for one to two hours in some southern Maine communities Tuesday morning, reducing visibility and making roads slippery.

Much of the region however, had turned over to rain by 11 a.m. with temperatures rising to the 40s.

The Maine Department of Transportation has lowered the speed limit on the Maine Turnpike and Interstate 295 to 45 mph north of Falmouth at the request of the Maine State Police because of slippery conditions.

Both southbound lanes of traffic on Interstate 295 in Richmond are open after one lane was shut down at mile 43 as rescue workers and road crews responded to a car that had rolled over at about 9:15 a.m.

Southern Maine police agencies reported some minor crashes because of the slippery conditions but no major injuries.

This story will be updated

David Hench can be contacted at 791-6327 or at:

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