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Ended official alertUpdated

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

This alert has ended.Kept for recent context. Do not use it as a current warning.

Official alert fields

What you need to know

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

2 captured
  1. 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
  2. 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
Methodology and corrections