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Green Harbor, Marshfield (In MLLW)

National Weather Service gauge GHBM3 · Massachusetts · Plymouth County · 42.0824, -70.6463

Stage at this gauge is reported In MLLW.

Flood levels

Official flood levels at this gauge: action stage begins at 11.0 ft; minor flooding begins at 11.5 ft; moderate flooding begins at 13.5 ft; major flooding begins at 15.5 ft.

Action stage11.0 ft
Minor flooding11.5 ft
Moderate flooding13.5 ft
Major flooding15.5 ft

What the water does

National Weather Service impact statements for this gauge, in the Weather Service's own words.

12.5 ftMinor flooding and beach erosion is expected across low lying sections of Cohasset, Scituate and Marshfield. Immediate coastal roads may be impassable for a time nearest the time of high tide.
13.0 ftFlooding is expected in low lying areas of Cohasset, Scituate and Marshfield. Some localized evaucations may be required as coastal roads become inundated. Large waves will produce beach erosion.
13.5 ftSignificant flooding of coastal areas along the South Shore from Cohasset to Plymouth is expected. Large swells breaking on the coastline may damage some immediate coastal roads and homes near the time of high tide. Evacuations and road closures may be required. Significant beach erosion is also likely.
14.0 ft14.0: Widespread flooding of coastal areas along the south shore from Cohasset to Plymouth is expected. Large swells breaking on the coastline may produce structural damage to roads and homes near the time of high tide. Evacuations and road closures may be required. Significant beach erosion is also expected.

Forecast office: NWS Norton · River Forecast Center: Northeast River Forecast Center.

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