The areas affected include... Coastal waters from Provincetown MA to Chatham MA to Nantucket MA out 20 NM... Nantucket Sound...
At 1104 PM EDT, Doppler radar indicated a strong thunderstorm, capable of producing winds to around 30 knots. This thunderstorm was located near Great Point Light On Nantucket, moving northeast at 20 knots.
Locations impacted include... Monomoy Point.