Coastal Flood Statement

Locations Affected

Boston, MA ∙ Cambridge, MA ∙ Lynn, MA ∙ Quincy, MA ∙ Revere, MA ∙ Weymouth, MA ∙ Peabody, MA ∙ Newburyport, MA ∙ Milton, MA ∙ Marblehead, MA

Full Alert Message

Coastal Hazard Message National Weather Service Boston/Norton MA 1036 PM EDT Mon Apr 28 2025 ...COASTAL FLOOD STATEMENT IN EFFECT UNTIL 4 AM EDT TUESDAY... * WHAT...One to two feet of inundation above ground level in low- lying areas near shorelines and tidal waterways (3.1 to 13.1 feet Mean Lower Low Water). * WHERE...Eastern Essex MA, Suffolk MA, Eastern Norfolk MA, Eastern Plymouth MA, Barnstable MA, Dukes MA and Nantucket MA Counties. * WHEN...Until 4 AM EDT Tuesday. * IMPACTS...Roads remain passable. Shallow pockets of very minor flooding less than one foot deep affect more vulnerable coastal roads along the North Shore from Salem and Gloucester to Newburyport. Rough surf will likely cause some splashover onto coastal roads around the time of high tide. * ADDITIONAL DETAILS...Very high astronomical tides very early this morning will result in pockets of splashover and perhaps very minor coastal flooding. However...no significant impacts are expected. PRECAUTIONARY/PREPAREDNESS ACTIONS... Do not drive through flooded roadways. && && Time of high total tides are approximate to the nearest hour. Gloucester Harbor MLLW Categories - Minor 11.5 ft, Moderate 13.0 ft, Major 15.0 ft MHHW Categories - Minor 2.0 ft, Moderate 3.5 ft, Major 5.5 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 29/01 AM 11.6/12.1 2.1/ 2.6 0.2/ 0.7 2 Minor 29/01 PM 10.4/10.9 0.9/ 1.4 0.4/ 0.9 2 None 30/01 AM 11.1/11.6 1.6/ 2.0 -0.2/ 0.2 3-4 None 30/02 PM 9.5/10.0 0.0/ 0.5 -0.2/ 0.2 2 None 01/02 AM 10.9/11.4 1.4/ 1.9 0.0/ 0.5 1-2 None Merrimack River near Newburyport MA MLLW Categories - Minor 11.0 ft, Moderate 12.0 ft, Major 13.5 ft MHHW Categories - Minor 1.5 ft, Moderate 2.5 ft, Major 4.0 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 29/01 AM 10.4/10.9 0.9/ 1.4 0.2/ 0.7 2 None 29/01 PM 9.1/ 9.6 -0.5/ 0.0 0.4/ 0.9 2 None 30/02 AM 10.0/10.5 0.5/ 1.0 -0.2/ 0.2 3 None 30/02 PM 8.3/ 8.8 -1.3/-0.8 -0.2/ 0.2 2 None 01/03 AM 10.0/10.5 0.5/ 1.0 0.0/ 0.5 1 None Boston Harbor MLLW Categories - Minor 12.5 ft, Moderate 14.0 ft, Major 15.0 ft MHHW Categories - Minor 2.4 ft, Moderate 3.9 ft, Major 4.9 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 29/01 AM 12.1/12.6 2.0/ 2.5 0.2/ 0.7 1 None 29/01 PM 10.7/11.2 0.6/ 1.1 0.2/ 0.8 1-2 None 30/01 AM 11.5/12.0 1.4/ 1.9 -0.2/ 0.2 2 None 30/02 PM 9.9/10.4 -0.2/ 0.2 -0.2/ 0.2 2 None 01/02 AM 11.4/11.9 1.3/ 1.8 0.0/ 0.5 1 None Revere MLLW Categories - Minor 12.5 ft, Moderate 14.5 ft, Major 16.0 ft MHHW Categories - Minor 2.6 ft, Moderate 4.6 ft, Major 6.1 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 29/01 AM 12.1/12.6 2.2/ 2.7 0.2/ 0.7 1 None 29/01 PM 10.7/11.2 0.8/ 1.3 0.2/ 0.8 2 None 30/01 AM 11.6/12.1 1.7/ 2.2 -0.2/ 0.2 2 None 30/02 PM 9.9/10.4 0.0/ 0.5 -0.2/ 0.2 2 None 01/02 AM 11.4/11.9 1.5/ 2.0 0.0/ 0.5 1 None Scituate MA MLLW Categories - Minor 11.5 ft, Moderate 13.5 ft, Major 15.5 ft MHHW Categories - Minor 1.8 ft, Moderate 3.8 ft, Major 5.8 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 29/01 AM 11.6/12.1 1.9/ 2.3 0.2/ 0.7 1 Minor 29/01 PM 10.2/10.7 0.5/ 1.0 0.2/ 0.8 1-2 None 30/01 AM 11.2/11.7 1.5/ 2.0 -0.2/ 0.2 3 None 30/02 PM 9.5/10.0 -0.2/ 0.2 -0.2/ 0.2 2 None 01/02 AM 11.2/11.7 1.5/ 2.0 0.0/ 0.5 1 None Buzzards Bay at Woods Hole MLLW Categories - Minor 5.5 ft, Moderate 7.0 ft, Major 8.5 ft MHHW Categories - Minor 3.5 ft, Moderate 5.0 ft, Major 6.5 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 28/09 PM 3.5/ 4.0 1.5/ 2.0 0.4/ 0.9 1 None 29/10 AM 2.7/ 3.2 0.7/ 1.1 0.2/ 0.7 1-2 None 29/10 PM 3.2/ 3.7 1.3/ 1.8 0.2/ 0.7 3-4 None 30/11 AM 2.0/ 2.5 0.0/ 0.5 -0.5/ 0.0 2-3 None 30/11 PM 2.8/ 3.4 0.9/ 1.4 0.0/ 0.5 1-2 None 01/12 PM 2.7/ 3.2 0.7/ 1.1 0.4/ 0.9 1 None Chatham MA - East Coast MLLW Categories - Minor 9.0 ft, Moderate 11.5 ft, Major 13.0 ft MHHW Categories - Minor 1.3 ft, Moderate 3.8 ft, Major 5.3 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 29/01 AM 6.4/ 6.9 -1.4/-0.9 0.2/ 0.7 2 None 29/02 PM 5.2/ 5.7 -2.6/-2.1 0.2/ 0.7 2-3 None 30/02 AM 5.7/ 6.2 -2.0/-1.5 -0.5/ 0.0 5 None 30/03 PM 4.7/ 5.2 -3.1/-2.6 -0.2/ 0.2 2-3 None 01/03 AM 6.0/ 6.5 -1.8/-1.3 0.0/ 0.5 2 None Chatham - South side MLLW Categories - Minor 9.0 ft, Moderate 10.5 ft, Major 11.5 ft MHHW Categories - Minor 4.5 ft, Moderate 6.0 ft, Major 7.0 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 29/01 AM 5.2/ 5.7 0.7/ 1.1 0.2/ 0.7 2 None 29/02 PM 4.2/ 4.7 -0.3/ 0.2 0.4/ 0.9 2-3 None 30/02 AM 4.7/ 5.2 0.2/ 0.8 -0.2/ 0.2 4 None 30/03 PM 3.5/ 4.0 -1.1/-0.6 -0.2/ 0.2 2 None 01/03 AM 4.9/ 5.4 0.4/ 0.9 0.0/ 0.5 1 None Provincetown Harbor MLLW Categories - Minor 13.0 ft, Moderate 14.0 ft, Major 15.0 ft MHHW Categories - Minor 2.9 ft, Moderate 3.9 ft, Major 4.9 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 29/01 AM 12.2/12.7 2.1/ 2.6 0.2/ 0.7 1-2 None 29/01 PM 10.7/11.2 0.6/ 1.1 0.2/ 0.7 2-3 None 30/01 AM 11.6/12.1 1.5/ 2.0 -0.2/ 0.2 4 None 30/02 PM 9.9/10.4 -0.2/ 0.2 -0.2/ 0.2 2 None 01/02 AM 11.5/12.0 1.4/ 1.9 0.0/ 0.5 2 None Dennis - Sesuit Harbor MLLW Categories - Minor 13.0 ft, Moderate 14.5 ft, Major 16.0 ft MHHW Categories - Minor 2.5 ft, Moderate 4.0 ft, Major 5.5 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 29/01 AM 12.7/13.2 2.2/ 2.7 0.2/ 0.7 1 None 29/01 PM 11.2/11.7 0.7/ 1.1 0.2/ 0.7 1-2 None 30/01 AM 12.2/12.7 1.7/ 2.2 -0.2/ 0.2 3-4 None 30/02 PM 10.5/11.0 0.0/ 0.5 -0.2/ 0.2 1-2 None 01/02 AM 12.1/12.6 1.6/ 2.0 0.0/ 0.5 1 None Sandwich Harbor MLLW Categories - Minor 12.0 ft, Moderate 14.0 ft, Major 15.0 ft MHHW Categories - Minor 1.7 ft, Moderate 3.7 ft, Major 4.7 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 29/01 AM 10.9/11.4 0.6/ 1.1 0.2/ 0.7 1 None 29/01 PM 9.5/10.0 -0.9/-0.4 0.2/ 0.7 1-2 None 30/01 AM 10.2/10.7 -0.2/ 0.3 -0.5/ 0.0 3-4 None 30/02 PM 8.8/ 9.3 -1.6/-1.1 -0.2/ 0.2 2-3 None 01/02 AM 10.4/10.9 0.1/ 0.6 0.0/ 0.5 1-2 None Wings Neck MLLW Categories - Minor 6.5 ft, Moderate 9.0 ft, Major 11.5 ft MHHW Categories - Minor 2.1 ft, Moderate 4.6 ft, Major 7.1 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 28/09 PM 5.9/ 6.4 1.5/ 2.0 0.4/ 0.9 1 None 29/10 AM 4.7/ 5.2 0.2/ 0.8 0.2/ 0.8 1-2 None 29/10 PM 5.9/ 6.4 1.5/ 2.0 0.6/ 1.1 2-3 None 30/10 AM 3.6/ 4.1 -0.9/-0.4 -0.5/ 0.0 3 None 30/11 PM 4.9/ 5.4 0.5/ 1.0 0.0/ 0.5 1 None 01/12 PM 4.4/ 4.9 0.0/ 0.5 0.4/ 0.9 1 None Edgartown MLLW Categories - Minor 4.0 ft, Moderate 5.0 ft, Major 7.0 ft MHHW Categories - Minor 3.2 ft, Moderate 4.2 ft, Major 6.2 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 29/12 AM 3.0/ 3.5 2.2/ 2.7 0.2/ 0.8 1 None 29/02 PM 2.1/ 2.6 1.3/ 1.8 0.2/ 0.7 2-3 None 30/02 AM 2.6/ 3.1 1.8/ 2.2 -0.2/ 0.2 4 None 30/03 PM 1.7/ 2.2 0.9/ 1.4 -0.2/ 0.2 2 None 01/03 AM 2.7/ 3.2 2.0/ 2.5 0.0/ 0.5 1 None Vineyard Haven MLLW Categories - Minor 4.5 ft, Moderate 6.0 ft, Major 7.0 ft MHHW Categories - Minor 2.5 ft, Moderate 4.0 ft, Major 5.0 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 29/01 AM 2.3/ 2.8 0.4/ 0.9 0.2/ 0.7 1 None 29/01 PM 2.1/ 2.6 0.1/ 0.6 0.4/ 0.9 1-2 None 30/02 AM 1.9/ 2.3 -0.2/ 0.3 -0.2/ 0.2 4 None 30/02 PM 1.5/ 2.0 -0.6/-0.1 -0.2/ 0.2 2 None 01/03 AM 2.0/ 2.5 0.0/ 0.5 0.0/ 0.5 1 None Nantucket Harbor MLLW Categories - Minor 5.0 ft, Moderate 6.5 ft, Major 8.0 ft MHHW Categories - Minor 1.4 ft, Moderate 2.9 ft, Major 4.4 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 29/01 AM 4.0/ 4.5 0.5/ 1.0 0.2/ 0.7 2 None 29/02 PM 3.2/ 3.7 -0.3/ 0.2 0.2/ 0.8 2-3 None 30/02 AM 3.7/ 4.2 0.2/ 0.7 -0.2/ 0.2 5 None 30/03 PM 2.7/ 3.2 -0.9/-0.4 -0.2/ 0.3 2-3 None 01/03 AM 3.9/ 4.4 0.2/ 0.8 0.0/ 0.5 2 None

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