Published October 21, 2026 4:34pm EDT Updated October 21, 2026 5:20pm EDT The system, formerly known as Invest 93L, is moving over the warm waters of the Gulf Stream, which helped it develop tropical characteristics as it gradually separates from a nearby frontal boundary. Subtropical Storm Josephine formed in the Atlantic on Wednesday as the storm moves up the East Coast and toward Cape Cod. WHAT IS A NOR’EASTER? The system, formerly known as Invest 93L, is moving over the warm waters of the Gulf Stream, which helped it develop tropical characteristics as it gradually separates from a nearby frontal boundary. Josephine's cone. (FOX Weather / FOX Weather) The storm is currently located about 265 miles south of Nantucket and has maximum sustained winds of 65 mph. The storm is forecast to move north-northeast before turning northeast and accelerate away from the East Coast by Friday.

It could briefly affect the Atlantic Canada area as it moves offshore. Gusty winds are expected to spread across parts of the Northeast beginning Wednesday evening and continuing into Thursday. WHAT IS AN INVEST DURING HURRICANE SEASON? Long Island and eastern Massachusetts could see wind gusts of 30 to 40 mph, while Nantucket and Martha’s Vineyard could experience gusts exceeding 50 mph on Thursday. Stats for Josephine. (FOX Weather / FOX Weather) Showers are also possible across Cape Cod and Rhode Island, although rainfall totals are expected to remain low.

Wind and rain are forecast to subside by this weekend. WHAT IS COASTAL EROSION AND WHY IS IT DANGEROUS? According to FOX Forecast Center, Josephine will cause coastal flooding in parts of the East Coast. For most areas outside the Chesapeake Bay, Wednesday afternoon’s high tide was the last period with coastal flooding. However, moderate coastal flooding could persist in parts of the Chesapeake Bay into Thursday or early Friday. Stay with FOX Weather as this story unfolds.