Special Marine Warning for Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM; Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket; Ocean Waters from Provincetown to Nantucket from 20 to 60 NM +2 more
Official alert fields
What you need to know
- Applies to
- Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket, Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM, Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM, Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM, Ocean Waters from Provincetown to Nantucket from 20 to 60 NM
- Effective
- Ended
- Official severity
- Severe
- Official urgency
- Immediate
- Official certainty
- Likely
What is happening
For the following areas... Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket... Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM... Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM... Ocean Waters from Montauk NY to Marthas Vineyard from 25 to...
What the bulletin says to do
Report severe weather to the Coast Guard or the National Weather Service.
Full official description
Bulletin details
For the following areas... Coastal Waters extending out to 25 NM South of Marthas Vineyard and Nantucket... Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM... Ocean Waters from Marthas Vineyard to Nantucket from 25 to 60 NM... Ocean Waters from Montauk NY to Marthas Vineyard from 25 to 60 NM... Ocean Waters from Provincetown to Nantucket from 20 to 60 NM... At 1136 PM EDT, a cluster of strong thunderstorms capable of producing waterspouts was located 29 nm south of The Coastal Waters South Of Nantucket, moving northeast at 40 knots. HAZARD...Waterspouts and wind gusts 34 knots or greater. SOURCE...Radar indicated. IMPACT...Waterspouts can easily overturn boats and create locally hazardous seas. Small craft could be damaged in briefly higher winds and suddenly higher waves. Locations impacted include... The Coastal Waters East Of Nantucket.
Lifecycle record
Official revisions
- Update
Special Marine Warning issued July 21 at 11:37PM EDT until July 22 at 12:30AM EDT by NWS Boston/Norton MA
Official revision - Alert
Special Marine Warning issued July 21 at 11:27PM EDT until July 22 at 12:30AM EDT by NWS Boston/Norton MA
Official revision
Source and limitations
Publisher: Weather Alert Watch. Primary source: NWS Boston/Norton MA. This page reorganizes official fields and does not add a forecast or expand the affected area.
- CAP status
- Actual
- Message type
- Update
- Last collected