Severe Severe Storm ● Closed
Special Marine Warning — Cape Cod Bay; Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary; Massachusetts Bay and Ipswich Bay; Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM
Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.
Special Marine Warning issued August 13 at 1:52PM EDT until August 13 at 2:00PM EDT by NWS Boston/Norton MA
Measurements
| Coordinates | 42.0480, -70.4320 |
|---|---|
| Region | Cape Cod Bay; Coastal waters east of Ipswich Bay and the Stellwagen Bank National Marine Sanctuary; Massachusetts Bay and Ipswich Bay; Coastal waters from |
| Expires | 2026-08-13T14:02:00-04:00 |
| Nws Urgency | Immediate |
| Nws Certainty | Likely |
Official source
Weather alert data courtesy of NOAA / National Weather Service
This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.
Severity as published by US National Weather Service.
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Source updated 67 days ago (Aug 13, 2026 17:58 UTC) · we last heard from US National Weather Service 34 seconds ago
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