The areas affected include... 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...
At 1017 PM EDT, Doppler radar indicated a strong thunderstorm, capable of producing winds to around 30 knots. This thunderstorm was located 13 nm southwest of The Coastal Waters South Of Nantucket, moving northeast at 25 knots.
Locations impacted include... The Coastal Waters South Of Nantucket, Surfside On Nantucket, Sankaty Head Light, and The Coastal Waters East Of Nantucket.