Active Weather Alerts
Coastal Flood Statement
Issued: 6:13 PM Apr. 18, 2026 – National Weather Service
...COASTAL FLOOD STATEMENT IN EFFECT FROM 11 PM EDT THIS EVENING THROUGH LATE TONIGHT... * WHAT...Up to one half foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways (2.6 to 12.8 feet Mean Lower Low Water). * WHERE...Eastern Essex MA, Suffolk MA, Eastern Norfolk MA, Eastern Plymouth MA, Barnstable MA and Nantucket MA Counties. * WHEN...From 11 PM EDT this evening through late tonight. * IMPACTS...Some water on low lying roads and property. 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 1.9 ft, Moderate 3.4 ft, Major 5.4 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/12 PM 9.8/10.3 0.2/ 0.7 0.5/ 1.0 2-3 None 19/01 AM 11.1/11.6 1.5/ 2.0 0.2/ 0.8 3 None 19/01 PM 10.0/10.5 0.4/ 0.9 0.6/ 1.1 3-4 None 20/02 AM 11.1/11.6 1.5/ 2.0 0.2/ 0.7 3 None 20/02 PM 9.4/ 9.9 -0.2/ 0.2 0.1/ 0.6 2 None 21/02 AM 10.7/11.2 1.1/ 1.6 0.0/ 0.5 2-3 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 -------- --------- --------- --------- ------- -------- 18/01 PM 8.9/ 9.4 -0.7/-0.2 0.2/ 0.8 2 None 19/01 AM 10.1/10.6 0.6/ 1.1 0.2/ 0.8 2-3 None 19/02 PM 9.0/ 9.5 -0.6/-0.1 0.5/ 1.0 3 None 20/02 AM 10.1/10.6 0.6/ 1.1 0.2/ 0.7 2 None 20/02 PM 8.3/ 8.8 -1.3/-0.8 0.1/ 0.6 2 None 21/03 AM 9.8/10.3 0.2/ 0.8 0.0/ 0.5 2 None Boston Harbor MLLW Categories - Minor 12.5 ft, Moderate 14.0 ft, Major 15.0 ft MHHW Categories - Minor 2.2 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 -------- --------- --------- --------- ------- -------- 18/12 PM 10.5/11.0 0.2/ 0.7 0.2/ 0.8 1-2 None 19/01 AM 12.0/12.5 1.7/ 2.2 0.4/ 0.9 1 None 19/01 PM 10.8/11.3 0.5/ 1.0 0.6/ 1.1 1-2 None 20/01 AM 11.7/12.2 1.4/ 1.9 0.2/ 0.8 1-2 None 20/02 PM 10.2/10.7 -0.2/ 0.3 0.2/ 0.7 1 None 21/02 AM 11.5/12.0 1.2/ 1.7 0.2/ 0.7 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 -------- --------- --------- --------- ------- -------- 18/12 PM 10.4/10.9 0.5/ 1.0 0.2/ 0.8 1-2 None 19/01 AM 11.7/12.2 1.8/ 2.2 0.2/ 0.8 1 None 19/01 PM 10.6/11.1 0.7/ 1.1 0.5/ 1.0 1-2 None 20/01 AM 11.4/11.9 1.5/ 2.0 0.2/ 0.7 1-2 None 20/02 PM 9.8/10.3 -0.2/ 0.3 0.0/ 0.5 1 None 21/02 AM 11.1/11.6 1.2/ 1.7 0.0/ 0.5 1 None Green Harbor MLLW Categories - Minor 11.5 ft, Moderate 13.5 ft, Major 15.5 ft MHHW Categories - Minor 1.6 ft, Moderate 3.6 ft, Major 5.6 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/01 PM 10.0/10.5 0.1/ 0.6 0.2/ 0.7 1-2 None 19/01 AM 11.4/11.9 1.5/ 2.0 0.2/ 0.8 2 Minor 19/01 PM 10.2/10.7 0.2/ 0.8 0.6/ 1.1 2 None 20/02 AM 11.4/11.9 1.5/ 2.0 0.2/ 0.7 2 Minor 20/02 PM 9.8/10.3 -0.2/ 0.3 0.2/ 0.7 2 None 21/03 AM 11.2/11.7 1.3/ 1.8 0.1/ 0.6 2 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 -------- --------- --------- --------- ------- -------- 18/01 PM 9.9/10.4 0.2/ 0.7 0.2/ 0.8 2 None 19/01 AM 11.4/11.9 1.7/ 2.2 0.5/ 1.0 2-3 Minor 19/01 PM 10.2/10.7 0.5/ 1.0 0.7/ 1.1 3 None 20/02 AM 11.3/11.8 1.6/ 2.0 0.2/ 0.8 3 Minor 20/02 PM 9.6/10.1 -0.2/ 0.3 0.2/ 0.7 2 None 21/02 AM 11.0/11.5 1.3/ 1.8 0.2/ 0.7 2 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 -------- --------- --------- --------- ------- -------- 18/10 PM 2.7/ 3.2 0.7/ 1.1 0.0/ 0.5 1-2 None 19/10 AM 2.0/ 2.5 0.0/ 0.5 0.2/ 0.8 1-3 None 19/10 PM 2.2/ 2.7 0.2/ 0.8 -0.2/ 0.2 2 None 20/10 AM 1.5/ 2.0 -0.6/-0.1 0.2/ 0.7 2 None 20/11 PM 1.9/ 2.3 -0.2/ 0.3 -0.6/-0.1 1-2 None Chatham MA - East Coast MLLW Categories - Minor 9.0 ft, Moderate 11.5 ft, Major 13.0 ft MHHW Categories - Minor 3.8 ft, Moderate 6.3 ft, Major 7.8 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/01 PM 5.6/ 6.1 0.4/ 0.9 0.4/ 0.9 2-3 None 19/01 AM 6.6/ 7.1 1.4/ 1.9 0.2/ 0.8 3 None 19/02 PM 5.7/ 6.2 0.5/ 1.0 0.5/ 1.0 3-4 None 20/02 AM 6.7/ 7.2 1.5/ 2.0 0.2/ 0.8 3 None 20/03 PM 5.1/ 5.6 -0.2/ 0.3 0.1/ 0.6 2 None 21/03 AM 6.4/ 6.9 1.2/ 1.7 0.1/ 0.6 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 -------- --------- --------- --------- ------- -------- 18/02 PM 4.0/ 4.5 -0.6/-0.1 0.2/ 0.7 2 None 19/02 AM 5.2/ 5.7 0.8/ 1.3 0.5/ 1.0 2 None 19/02 PM 4.4/ 4.9 -0.2/ 0.3 0.7/ 1.1 3 None 20/02 AM 5.2/ 5.7 0.8/ 1.3 0.4/ 0.9 2-3 None 20/04 PM 3.9/ 4.4 -0.7/-0.2 0.2/ 0.7 2 None 21/03 AM 5.0/ 5.5 0.5/ 1.0 0.1/ 0.6 2 None Hyannis Harbor MLLW Categories - Minor 5.0 ft, Moderate 6.5 ft, Major 8.5 ft MHHW Categories - Minor 1.2 ft, Moderate 2.7 ft, Major 4.7 ft Total Total Departure Day/Time Tide Tide from Norm Waves Flood ft MLLW ft MHHW ft ft Impact -------- --------- --------- --------- ------- -------- 18/02 PM 3.4/ 3.9 -0.5/ 0.0 0.2/ 0.7 1 None 19/02 AM 4.2/ 4.7 0.5/ 1.0 0.1/ 0.6 1 None 19/02 PM 3.7/ 4.2 -0.2/ 0.3 0.6/ 1.1 2-3 None 20/03 AM 4.4/ 4.9 0.6/ 1.1 0.1/ 0.6 2 None 20/04 PM 3.1/ 3.6 -0.8/-0.2 0.0/ 0.5 1 None 21/03 AM 4.0/ 4.5 0.2/ 0.8 -0.2/ 0.3 1-2 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 -------- --------- --------- --------- ------- -------- 18/01 PM 10.5/11.0 0.4/ 0.9 0.2/ 0.7 2 None 19/01 AM 11.9/12.4 1.8/ 2.2 0.4/ 0.9 2-3 None 19/01 PM 10.7/11.2 0.6/ 1.1 0.7/ 1.1 3 None 20/02 AM 11.7/12.2 1.6/ 2.0 0.2/ 0.8 3 None 20/02 PM 10.0/10.5 -0.2/ 0.3 0.2/ 0.7 2 None 21/02 AM 11.2/11.7 1.1/ 1.6 0.2/ 0.8 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 -------- --------- --------- --------- ------- -------- 18/01 PM 11.1/11.6 0.6/ 1.1 0.4/ 0.9 1-2 None 19/01 AM 12.6/13.1 2.1/ 2.6 0.6/ 1.1 2 None 19/01 PM 11.3/11.8 0.8/ 1.3 0.8/ 1.3 2-3 None 20/02 AM 12.6/13.1 2.1/ 2.6 0.5/ 1.0 2 None 20/02 PM 10.9/11.4 0.4/ 0.9 0.4/ 0.9 1 None 21/03 AM 12.3/12.8 1.8/ 2.2 0.4/ 0.9 1-2 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 -------- --------- --------- --------- ------- -------- 18/01 PM 8.9/ 9.4 -1.5/-1.0 0.0/ 0.5 1-2 None 19/01 AM 10.7/11.2 0.4/ 0.9 0.6/ 1.1 1 None 19/01 PM 9.6/10.1 -0.8/-0.2 0.8/ 1.3 2 None 20/02 AM 10.5/11.0 0.2/ 0.7 0.4/ 0.9 1-2 None 20/02 PM 9.1/ 9.6 -1.3/-0.8 0.4/ 0.9 1 None 21/02 AM 10.3/10.8 0.0/ 0.5 0.4/ 0.9 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 -------- --------- --------- --------- ------- -------- 18/10 PM 4.6/ 5.1 0.2/ 0.7 -0.6/-0.1 1 None 19/10 AM 3.9/ 4.4 -0.6/-0.1 -0.2/ 0.3 1-2 None 19/11 PM 4.0/ 4.5 -0.3/ 0.2 -0.9/-0.4 1-2 None 20/10 AM 3.5/ 4.0 -1.0/-0.5 0.1/ 0.6 1 None 20/11 PM 3.6/ 4.1 -0.9/-0.4 -1.0/-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 -------- --------- --------- --------- ------- -------- 18/01 PM 3.2/ 3.7 -0.3/ 0.2 0.4/ 0.9 3 None 19/02 AM 4.2/ 4.7 0.7/ 1.1 0.2/ 0.8 2 None 19/02 PM 3.4/ 3.9 -0.2/ 0.2 0.5/ 1.0 3-4 None 20/03 AM 4.2/ 4.7 0.7/ 1.1 0.2/ 0.8 3 None 20/04 PM 2.8/ 3.4 -0.8/-0.2 0.1/ 0.6 2 None 21/04 AM 4.0/ 4.5 0.5/ 1.0 0.1/ 0.6 2-3 None &&
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