Active Weather Alerts
Gale Warning
Issued: 6:29 PM May. 21, 2025 – National Weather Service
...GALE WARNING NOW IN EFFECT FROM 2 PM THURSDAY TO 5 AM EDT FRIDAY... * WHAT...Northeast winds 20 to 30 kt with gusts up to 45 kt and seas 7 to 12 feet expected. * WHERE...Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary and Massachusetts Bay and Ipswich Bay. * WHEN...From 2 PM Thursday to 5 AM EDT Friday. * IMPACTS...Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility. PRECAUTIONARY/PREPAREDNESS ACTIONS... Mariners should alter plans to avoid these hazardous conditions. Remain in port, seek safe harbor, alter course, and/or secure the vessel for hazardous conditions. &&
Coastal Flood Advisory
Issued: 6:00 PM May. 21, 2025 – National Weather Service
...COASTAL FLOOD ADVISORY IN EFFECT FROM 6 PM TO 11 PM EDT THURSDAY... * WHAT...Less than a foot of inundation above ground level expected in low-lying areas near shorelines and tidal waterways (3.7 to 12.2 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...From 6 PM to 11 PM EDT Thursday. * IMPACTS...Roads remain passable. Low lying areas and roads near Nantucket Harbor, including Easy Street, may experience pockets of shallow flooding less than one foot deep. PRECAUTIONARY/PREPAREDNESS ACTIONS... If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property. && && 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 -------- --------- --------- --------- ------- -------- 21/06 AM 9.6/10.1 0.1/ 0.6 0.8/ 1.3 3-4 None 21/07 PM 9.3/ 9.8 -0.2/ 0.2 0.6/ 1.1 4 None 22/08 AM 9.5/10.0 0.0/ 0.5 0.6/ 1.1 4-5 None 22/08 PM 11.1/11.6 1.6/ 2.0 1.8/ 2.2 7-8 None 23/08 AM 9.7/10.2 0.2/ 0.7 0.7/ 1.1 8-9 None 23/09 PM 10.3/10.8 0.8/ 1.3 0.4/ 0.9 5-6 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 -------- --------- --------- --------- ------- -------- 21/07 AM 9.3/ 9.8 -0.2/ 0.2 0.8/ 1.3 3 None 21/07 PM 9.0/ 9.5 -0.6/-0.1 0.6/ 1.1 3 None 22/08 AM 9.3/ 9.8 -0.2/ 0.2 0.7/ 1.1 3-4 None 22/08 PM 10.8/11.3 1.3/ 1.8 1.9/ 2.3 5 Minor 23/09 AM 9.4/ 9.9 -0.2/ 0.3 0.6/ 1.1 6 None 23/09 PM 9.9/10.4 0.4/ 0.9 0.4/ 0.9 3-4 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 -------- --------- --------- --------- ------- -------- 21/06 AM 10.2/10.7 0.1/ 0.6 0.8/ 1.3 2 None 21/07 PM 9.9/10.4 -0.2/ 0.2 0.6/ 1.1 2 None 22/07 AM 10.3/10.8 0.2/ 0.7 0.8/ 1.3 2-3 None 22/08 PM 12.0/12.5 1.9/ 2.3 2.1/ 2.6 3-4 None 23/08 AM 10.2/10.7 0.1/ 0.6 0.6/ 1.1 4 None 23/09 PM 10.9/11.4 0.8/ 1.3 0.4/ 0.9 3 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 -------- --------- --------- --------- ------- -------- 21/06 AM 10.0/10.5 0.1/ 0.6 0.8/ 1.3 2 None 21/07 PM 9.7/10.2 -0.2/ 0.2 0.6/ 1.1 2 None 22/07 AM 10.0/10.5 0.1/ 0.6 0.7/ 1.1 2 None 22/08 PM 11.7/12.2 1.8/ 2.2 2.0/ 2.5 3 None 23/08 AM 9.9/10.4 0.0/ 0.5 0.5/ 1.0 3 None 23/09 PM 10.7/11.2 0.8/ 1.3 0.4/ 0.9 2-3 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 -------- --------- --------- --------- ------- -------- 21/07 AM 9.7/10.2 0.0/ 0.5 0.8/ 1.3 3 None 21/07 PM 9.3/ 9.8 -0.5/ 0.0 0.6/ 1.1 3 None 22/08 AM 9.7/10.2 0.0/ 0.5 0.7/ 1.1 4 None 22/08 PM 11.2/11.7 1.5/ 2.0 1.9/ 2.3 6 None 23/08 AM 9.6/10.1 -0.2/ 0.3 0.6/ 1.1 7 None 23/09 PM 10.3/10.8 0.6/ 1.1 0.4/ 0.9 4-5 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 -------- --------- --------- --------- ------- -------- 21/04 AM 2.7/ 3.2 0.7/ 1.1 0.9/ 1.4 1 None 21/04 PM 2.5/ 3.0 0.5/ 1.0 0.7/ 1.1 1 None 22/04 AM 2.5/ 3.0 0.5/ 1.0 0.7/ 1.1 2 None 22/06 PM 3.7/ 4.2 1.7/ 2.2 1.7/ 2.2 3 None 23/05 AM 2.0/ 2.5 0.0/ 0.5 0.2/ 0.7 2-3 None 23/06 PM 2.7/ 3.2 0.8/ 1.3 0.2/ 0.8 2 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 -------- --------- --------- --------- ------- -------- 21/07 AM 6.9/ 7.4 -0.9/-0.4 0.8/ 1.3 3 None 21/08 PM 6.0/ 6.5 -1.8/-1.3 0.5/ 1.0 3 None 22/08 AM 6.8/ 7.3 -1.0/-0.5 0.6/ 1.1 4-5 None 22/08 PM 8.0/ 8.5 0.2/ 0.8 1.8/ 2.2 6-7 None 23/09 AM 6.6/ 7.1 -1.1/-0.7 0.2/ 0.8 6 None 23/09 PM 6.7/ 7.2 -1.1/-0.6 0.2/ 0.7 4 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 -------- --------- --------- --------- ------- -------- 21/07 AM 4.9/ 5.4 0.4/ 0.9 0.7/ 1.1 3 None 21/08 PM 4.7/ 5.2 0.2/ 0.7 0.6/ 1.1 3 None 22/08 AM 4.7/ 5.2 0.2/ 0.8 0.7/ 1.1 3-4 None 22/08 PM 6.0/ 6.5 1.5/ 2.0 1.8/ 2.2 5-6 None 23/10 AM 4.2/ 4.7 -0.2/ 0.2 0.2/ 0.8 5 None 23/09 PM 4.9/ 5.4 0.4/ 0.9 0.2/ 0.8 3-4 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 -------- --------- --------- --------- ------- -------- 21/07 AM 10.1/10.6 0.0/ 0.5 0.7/ 1.1 3 None 21/07 PM 9.8/10.3 -0.3/ 0.2 0.5/ 1.0 3 None 22/08 AM 10.0/10.5 -0.2/ 0.3 0.5/ 1.0 4-5 None 22/08 PM 11.6/12.1 1.5/ 2.0 1.7/ 2.2 6 None 23/08 AM 10.3/10.8 0.2/ 0.7 0.7/ 1.1 6 None 23/09 PM 10.9/11.4 0.8/ 1.3 0.4/ 0.9 4-5 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 -------- --------- --------- --------- ------- -------- 21/07 AM 10.2/10.7 -0.3/ 0.2 0.8/ 1.3 2 None 21/07 PM 9.9/10.4 -0.7/-0.2 0.6/ 1.1 2 None 22/08 AM 10.0/10.5 -0.6/-0.1 0.5/ 1.0 2-3 None 22/08 PM 11.7/12.2 1.2/ 1.7 1.7/ 2.2 3-4 None 23/09 AM 10.4/10.9 -0.2/ 0.3 0.7/ 1.1 3 None 23/09 PM 10.9/11.4 0.4/ 0.9 0.4/ 0.9 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 -------- --------- --------- --------- ------- -------- 21/06 AM 9.5/10.0 -0.9/-0.4 0.9/ 1.4 2 None 21/07 PM 9.2/ 9.7 -1.1/-0.7 0.6/ 1.1 2 None 22/08 AM 9.4/ 9.9 -1.0/-0.5 0.7/ 1.1 2 None 22/08 PM 11.1/11.6 0.8/ 1.3 2.0/ 2.5 3 None 23/08 AM 9.4/ 9.9 -1.0/-0.5 0.6/ 1.1 2 None 23/09 PM 10.1/10.6 -0.2/ 0.2 0.4/ 0.9 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 -------- --------- --------- --------- ------- -------- 21/04 PM 4.6/ 5.1 0.2/ 0.7 0.8/ 1.3 1 None 22/04 AM 4.2/ 4.7 -0.2/ 0.3 0.7/ 1.1 1-2 None 22/05 PM 5.1/ 5.6 0.7/ 1.1 0.9/ 1.4 2 None 23/04 AM 4.2/ 4.7 -0.2/ 0.2 0.8/ 1.3 2 None 23/06 PM 5.1/ 5.6 0.7/ 1.1 0.5/ 1.0 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 -------- --------- --------- --------- ------- -------- 21/06 AM 3.1/ 3.6 2.2/ 2.7 0.9/ 1.4 2 None 21/08 PM 3.0/ 3.5 2.2/ 2.7 0.7/ 1.1 2 None 22/08 AM 3.1/ 3.6 2.2/ 2.7 0.9/ 1.4 3 None 22/06 PM 4.0/ 4.5 3.2/ 3.7 1.8/ 2.2 4 Minor 23/09 AM 2.2/ 2.7 1.4/ 1.9 0.1/ 0.6 3 None 23/09 PM 2.8/ 3.4 2.1/ 2.6 0.2/ 0.7 2-3 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 -------- --------- --------- --------- ------- -------- 21/05 AM 2.5/ 3.0 0.5/ 1.0 0.9/ 1.4 1 None 21/08 PM 2.3/ 2.8 0.4/ 0.9 0.7/ 1.1 1-2 None 22/08 AM 2.5/ 3.0 0.5/ 1.0 0.9/ 1.4 2-3 None 22/06 PM 3.5/ 4.0 1.5/ 2.0 1.8/ 2.2 3 None 23/09 AM 1.8/ 2.2 -0.2/ 0.2 0.2/ 0.7 2 None 23/09 PM 2.2/ 2.7 0.2/ 0.7 0.2/ 0.7 2 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 -------- --------- --------- --------- ------- -------- 21/07 AM 4.0/ 4.5 0.5/ 1.0 0.8/ 1.3 3 None 21/08 PM 3.7/ 4.2 0.2/ 0.7 0.6/ 1.1 3 None 22/08 AM 4.0/ 4.5 0.4/ 0.9 0.7/ 1.1 4-5 None 22/08 PM 5.2/ 5.7 1.6/ 2.0 1.7/ 2.2 6 Minor 23/09 AM 3.5/ 4.0 -0.2/ 0.3 0.2/ 0.8 5 None 23/09 PM 4.0/ 4.5 0.4/ 0.9 0.2/ 0.7 3-4 None &&
Wind Advisory
Issued: 5:27 PM May. 21, 2025 – National Weather Service
...WIND ADVISORY IN EFFECT FROM 2 PM TO 11 PM EDT THURSDAY... * WHAT...Northeast winds 15 to 25 mph with gusts up to 50 mph expected. * WHERE...Eastern Norfolk MA, Suffolk MA, Eastern Essex MA, and Eastern Plymouth MA Counties. * WHEN...From 2 PM to 11 PM EDT Thursday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and some power outages may result. PRECAUTIONARY/PREPAREDNESS ACTIONS... Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution. &&
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