Beaches across the SouthCoast and Rhode Island may see "significant erosion" as the region is put on a coastal flood watch ahead of a storm expected later this week.

That's according to the National Weather Service, which named Westport in particular as an area at risk of beach erosion Thursday to Friday.

In a weather alert, the national service noted that flooding one to two feet above ground level could be possible at high tide in low-lying areas near shores or tidal waterways.

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Residents should be aware that some roads may be closed during the flood watch period, which will take effect late Thursday and last until 2 p.m. Friday afternoon.

It covers coastal regions in northeastern, eastern, and southeastern Massachusetts as well as both northern and southern Rhode Island.

"Widespread minor coastal flooding is expected along portions of both the east and south coasts during the Friday morning high tide cycle," the alert text reads, adding that moderate coastal flooding is also possible in certain areas.

Low-lying shoreline roads could become impassable due to flooding, according to the alert.

It goes on to state that "there may be significant beach erosion on the south coast including ocean exposed beaches of Rhode Island and Westport."

Erosion may also take place on beaches along the south sides of Martha's Vineyard and Nantucket.

If the storm slows, according to the weather service, there may be additional flooding during the Friday evening high tide.

Area residents are advised to give themselves extra time to get around in case of flooded roads.

"Do not drive around barricades or through water of unknown depth," the alert cautions, adding that residents should take action to protect flood-prone property.

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