The 1948 Bermuda–Newfoundland hurricane (Air Weather Service designation: Dog)[1] was an intense and long-lived Cape Verde tropical cyclone that caused significant damage in Bermuda and areas of Newfoundland in September 1948.

Despite never making landfall, the tropical cyclone disrupted numerous shipping lanes and inflicted damage on Bermuda and Newfoundland.

[nb 1] After passing west of Bermuda, the tropical cyclone tracked across numerous shipping lanes.

Beginning on September 15, the hurricane tracked east of Newfoundland, producing heavy rainfall on land.

On September 3, the tropical wave from which the resulting hurricane would develop from was detected just off the coast of western Africa near Dakar.

As no reasonably quantifiable strengthening occurred afterwards, this also marked the storm's official peak intensity as maximum sustained winds were analyzed at 135 mph (215 km/h).

[4] During the storm's twelve-day trek, the hurricane tracked approximately 3,500 mi (5,600 km), roughly equidistant to the distance between New York City and London.

[2] As the hurricane traversed the Central Atlantic, the United States Weather Bureau indicated that the storm would not be a threat to continental land masses due to its isolated position.

[10] After recurving in the direction of Bermuda, the British overseas colony was advised to begin prompt precautionary measures against storm surge and strong winds, which were expected from the hurricane.

Aircraft from the United States Air Force and Navy stationed in Bermuda were sent to airfields in the United States to avoid the hurricane, while a Navy task force of twelve ships including the escort carrier USS Mindoro (CVE-120) were dispatched from the island.

[13] The strong winds downed power lines and felled trees, littering insular streets with debris.

[17] After sweeping past Bermuda, the Weather Bureau continued to advise caution to shipping lanes in the storm's proximity.

[19] Two coastal railway steamers destined for a Newfoundland port were delayed as a result of the approaching storm.

The freighter Leicester, which had departed from London and was headed for New York City, was caught in the hurricane late on September 14 while situated roughly 400 mi (640 km) southwest of Cape Race, Newfoundland.

[22] The Portuguese fishing schooner Gaspar was also caught in the storm roughly 300 mi (480 km) off of Newfoundland,[23] and although initial reports presumed that it had already sunk, the United States Coast Guard indicated that the ship was in no need of assistance.

With winds equivalent to that of a Category 1 hurricane, the cyclone brushed east of the island, bringing extensive flooding.