A weekend Nor’easter could hit parts of northern New England with up to 8 inches of snow before Saturday afternoon, the National Weather Service warned on Friday morning.

The National Weather Service issued a winter storm watch for northern parts of New Hampshire and Maine, saying a low pressure system off the Atlantic Coast could produce heavy snow in the area. The service said snow was expected to begin falling later tonight and continue through Saturday afternoon, and between 4 and 8 inches were expected to accumulate in those regions.

The National Weather Service also said there was a chance for freezing rain, sleet and rain elsewhere in New England, but had yet to issue any specific warnings as of early Friday. Temperatures in southern New England were expected to remain above the freezing point.

A large storm was bringing rain to the southeastern United States on Friday, and the National Weather Service said it was expected to intensify as it made its way toward New England. But the storm wasn’t expected to bring significant rainfall — forecasts called for a high of about 2 inches in coastal parts of South Carolina. The National Weather Service issued a flash flood watch for those regions.

Separately, the National Weather Service issued winter storm watches for parts of Washington, Oregon and California, as more snow was expected to arrive on Saturday. Snowfall totals were expected to reach 1 to 2 feet on Mount Rainier, according to the National Weather Service, while other mountainous areas of Washington were expected to receive between 6 and 10 inches.

Totals were expected to be lighter in Washington’s valleys, Oregon and California, but still significant. Forecasts were calling for anywhere between 3 and 6 inches of snow in watch areas.

The National Weather Service encouraged people that may be affected by the storm to keep an eye on updated local forecasts.