Good afternoon everyone, 

Here is the latest forecast information for Hurricane Dorian. There have been no significant changes since this morning. Tropical Storm Watches remain in effect for Cape Cod and the Islands as well as the adjacent coastal waters.

Headlines: 
-Tropical Storm Watches for Cape Cod and the Islands as well as adjacent coastal waters.

Period of greatest Threat:
- Late Friday night into Saturday morning

Locations most at risk
- Cape Cod and islands, as well as the adjacent coastal waters. Highest risk is Nantucket and coastal waters to their east and south.

Potential Impacts: 
Period of 40 to 60 mph wind gusts across Cape Cod and The Islands.  This may result in some downed trees and scattered power outages.
- Heavy rain of 1 to 4 inches across Cape Cod and The Islands.  Heaviest rain occurs late Friday night into Saturday morning. Some urban/poor drainage street flooding may occur.
- Minor coastal flooding possible between 6 and 10 am on the north side of Nantucket and perhaps some north or east facing beaches of Cape Cod.  No significant coastal flooding or property damage is expected.
- 45 to 55 knot wind gusts and 15 to 20+ foot seas across our waters, especially across the waters east of Cape Cod and Nantucket. Dangerous Conditions for mariners.

Confidence:
- Moderate to high confidence in a period of strong wind gusts and heavy rain across the Cape and Islands, especially Nantucket.
- If the track of Dorian shifts a bit further east than expected the strong winds would be confined to Nantucket points south and east.
- If the track of Dorian shifts further west than expected strong wind gusts of 40 to 50 mph wind gusts along and southeast of a Boston to Providence line.

The next scheduled briefing is after the 5 PM Thursday advisory from the National Hurricane Center, unless there is a need for a briefing sooner. Should you require any updates prior to that time, please feel free to contact us.

Thank You 

Meteorologists: Bryce Williams and Andrew Loconto 

If you have any questions or would like more information, don't hesitate to contact us via this email address, on NWSChat, or at the following:

National Weather Service Boston/Norton, MA

46 Commerce Way
Norton, MA 02766
508.622.3280
Website | Facebook | Twitter