Hurricane Bob

Meteorological History and Track

Hurricane Bob originated from the remnants of a frontal trough southeast of Bermuda around August 12, 1991. The system tracked westward and organized into a tropical depression near the Bahamas by 0000 UTC on August 16. It was upgraded to Tropical Storm Bob about 18 hours later as it developed convective banding features while located roughly 140 miles northeast of Nassau. The storm initially moved slowly northwestward, steered by the deep layer mean flow. A deepening trough over the eastern United States was forecast to turn Bob northward, a turn which occurred earlier than anticipated. As the storm moved over the warm waters of the Gulf Stream, it began to consolidate. A reconnaissance aircraft recorded hurricane-force winds at 1719 UTC on August 17, prompting the National Hurricane Center to upgrade Bob to a Category 1 hurricane.

The hurricane turned toward the north-northeast in response to a subtropical ridge over the Atlantic and the trough over the southeastern United States. By August 18, Bob became increasingly organized with deep convection forming and an eye appearing on satellite imagery. Early on August 19, the eye became well-defined as the centre passed about 35 miles off the North Carolina coastline. At 0600 UTC that day, the storm reached its peak intensity with maximum sustained winds of 115 mph and a minimum central pressure of 950 mbar, making it a major Category 3 hurricane. After peaking, Bob accelerated northeastward at about 25 mph, steered by the trough, an upper-level low over the Great Lakes, and the Atlantic ridge.

Significantly cooler sea surface temperatures north of Cape Hatteras caused the hurricane to weaken. The eye became cloud-filled as Bob's western eyewall brushed the eastern tip of Long Island in the afternoon of August 19. Around 1800 UTC, the centre of Hurricane Bob made its first United States landfall on Block Island, Rhode Island, followed shortly by a second landfall near Newport, Rhode Island, with winds of 100 mph, classifying it as a Category 2 hurricane at landfall. The storm rapidly weakened as it moved through Rhode Island and Massachusetts before entering the Gulf of Maine. It made another landfall near Rockland, Maine, as a strong tropical storm around 0130 UTC on August 20.

The storm crossed through Maine and entered the Canadian province of New Brunswick later on August 20. Around 1800 UTC, Bob transitioned into an extratropical cyclone over the Gulf of St. Lawrence. The remnants passed over northern Newfoundland early on August 21 before re-entering the open Atlantic Ocean. The system traveled a long distance eastward across the northern Atlantic, briefly weakening to tropical depression strength before finally dissipating west of Portugal on August 29.

Preparations and Evacuations

Extensive preparations were undertaken along the United States east coast as Bob approached. After Bob was upgraded to a hurricane on August 17, the National Hurricane Center issued a hurricane watch, later a warning, for coastal North Carolina from Little River Inlet to Virginia Beach, Virginia. Mandatory evacuation orders were declared for the outermost islands of North Carolina's Outer Banks, leading an estimated 50,000 to 100,000 people to leave the region. Traffic delays exceeded three hours in some areas. Several bridges were closed, campgrounds were shut down, and an evacuation shelter was opened in Carteret County. In Virginia, 125 planes were relocated from Langley Air Force Base to Ohio.

As forecasts showed Bob heading for southern New England, an extensive hurricane warning was issued late on August 18 from Cape Henlopen, Delaware, to Plymouth, Massachusetts, including Long Island. The warning was later extended northward to Eastport, Maine. The Canadian Hurricane Centre began issuing wind and heavy rain warnings for Nova Scotia, Prince Edward Island, and New Brunswick. In New England, officials in Connecticut and Rhode Island declared states of emergency. All state workers were sent home early, and the Connecticut Legislature canceled a session. Submarines stationed in Groton, Connecticut, left port to wait out the storm underwater.

In Rhode Island, about 3,500 people evacuated, including 2,000 from Block Island. The American Red Cross opened 40 shelters in the state. In Massachusetts, thousands evacuated Cape Cod, causing an 11-mile backup on the Sagamore Bridge. About 50,000 people left their homes statewide, with 6,500 using shelters. On Martha's Vineyard, residents stocked up on batteries, radios, and flashlights. President George H. W. Bush, who was at his home in Kennebunkport, Maine, evacuated by motorcade to Pease Air Force Base in New Hampshire. The closure of parts of Interstate 95 for his travel created significant traffic backups. In New Hampshire, about 5,200 people, mostly tourists, evacuated the coastline. In Maine, 49 shelters were opened and about 8,600 people evacuated along the York County coastline. Fishermen in the Bay of Fundy were urged to return to port due to fears of large swells.

Impact on the United States

Hurricane Bob caused widespread damage along the east coast of the United States, with total losses estimated at about $1.5 billion in 1991 dollars. The storm left approximately 2.1 million people without power across its track. Six tornadoes were confirmed in association with Bob's outer rainbands. In the Carolinas, the storm's centre passed well east of South Carolina, but large swells caused one drowning in Myrtle Beach. The Outer Banks of North Carolina experienced the brunt of Bob's early impacts. The storm brought strong winds, with sustained winds of 62 mph recorded at Duck and gusts to 74 mph at Cape Hatteras. Diamond Shoal Light recorded a gust of 123 mph. Rainfall reached 5.30 inches at Cape Hatteras, leading to flooding. Six tornadoes struck the state, causing $256,000 in damage in Dare County. One person was killed in North Carolina, and total damage was estimated at $8 million.

Impacts were minimal in Virginia and Maryland, with only minor beach erosion reported. In New Jersey, the storm caused widespread beach erosion along the Jersey Shore. The heaviest rainfall outside of New England occurred on Long Island, New York, where 7.18 inches fell in Bridgehampton. Two tornadoes struck Long Island. High winds caused extensive agricultural damage, destroying cornfields and orchards and wrecking potato crops, resulting in an estimated $20 million in crop losses. Power outages affected 477,765 customers on Long Island for nearly five days. Two fatalities occurred in New York, one in a car accident and another when a falling tree struck a train conductor. Statewide damage in New York exceeded $75 million.

The most severe damage occurred in New England, where Bob made landfall. On Block Island, Rhode Island, wind gusts were recorded at 105 mph, likely higher as instruments neared their upper limit. On the mainland, winds peaked at 90 mph in Narragansett. A storm surge of 6.6 feet inundated Providence, and the peak storm tide reached 16.5 feet at the mouth of the Sakonnet River. The hurricane caused about 200,000 power outages in Rhode Island, leaving about 60 percent of residents in the state and southeastern Massachusetts without electricity. Treatment plants spilled over 100 million tons of sewage into Narragansett Bay due to overflow. Damage in Rhode Island totaled over $115 million. The storm also caused significant damage in Connecticut and Massachusetts as it tracked inland, with widespread wind damage and flooding reported.

Impact on Canada and Transition

After crossing Maine, the remnants of Hurricane Bob entered western New Brunswick on August 20, 1991. By 1800 UTC that day, the system had completed its transition into an extratropical cyclone over the Gulf of St. Lawrence. The Canadian Hurricane Centre had issued wind and heavy rain warnings for the Maritime provinces in anticipation of the storm's arrival. While specific damage totals for Canada are not detailed in the available notes, the storm's passage brought the typical impacts of a transitioning tropical system, including gusty winds and rainfall. The extratropical remnants of Bob then tracked over northern Newfoundland early on August 21 before moving back into the open Atlantic Ocean. The storm's impact on Canadian fisheries was noted, with fishermen in the Bay of Fundy being urged to return to port due to fears of large swells generated by the distant hurricane. The event highlighted the reach of tropical systems into Canadian waters and the importance of monitoring storms that move north along the eastern seaboard. The transition of Hurricane Bob into an extratropical system over Canadian territory is a common endpoint for hurricanes that recurve northward, and it underscores the role of the Canadian Hurricane Centre in tracking these systems even after they lose tropical characteristics.

Aftermath and Historical Context

In the immediate aftermath, recovery efforts focused on restoring power to millions of customers and clearing debris. The storm's $1.5 billion in damage made it one of the costliest United States hurricanes at the time. Some sources suggested damage could have been as high as $3 billion in 1991 dollars. As of 2010, Hurricane Bob ranked as the 22nd costliest tropical cyclone to affect the United States mainland. The name "Bob" was retired from the list of Atlantic hurricane names following the 1991 season, ensuring it would not be used again for a future storm. This retirement is a standard practice by the World Meteorological Organization for storms that cause significant damage or loss of life.

Hurricane Bob is historically significant as the most recent hurricane to strike the New England states directly as a hurricane. Its track was notably similar to that of the destructive Hurricane Carol in 1954. The storm occurred during a period of increased focus on hurricane preparedness and forecasting. The 35th anniversary of Hurricane Bob was noted in August 2026, recalling the sustained winds and gusts of 125 mph at Block Island and 105 mph at Newport. The storm remains a benchmark event for emergency planners in the northeastern United States and Atlantic Canada when considering the potential impacts of a hurricane taking a northward track.

The 2026 Atlantic Hurricane Season Context

The 2026 Atlantic hurricane season provides a modern contrast to the active period that included Hurricane Bob. Forecasters with NOAA's National Weather Service predicted a below-normal season for 2026. The outlook, issued before the season's June 1 start, forecast a 55 percent chance of a below-normal season, a 35 percent chance of a near-normal season, and only a 10 percent chance of an above-normal season. They predicted a total of 8 to 14 named storms, of which 3 to 6 could become hurricanes, including 1 to 3 major hurricanes. This is below the seasonal average of 14 named storms, seven hurricanes, and three major hurricanes.

The primary factor expected to suppress activity was the development and intensification of El Niño conditions during the season. El Niño tends to increase wind shear over the Caribbean and Atlantic, which disrupts tropical cyclone formation. This was counteracted somewhat by forecasts of slightly warmer than normal Atlantic ocean temperatures and weaker than average trade winds, which can favour development. NOAA officials emphasized that despite a quieter seasonal forecast, preparedness was critical because it only takes one landfalling storm to create a disastrous season, as exemplified by Hurricane Bob in 1991. The 2026 season saw its first hurricane with Isaias, which strengthened to a Category 3 major hurricane in the Gulf of Mexico before making landfall, demonstrating that active storms can still form even in a less active seasonal regime.

Questions about Hurricane Bob

What was the cost of damage from Hurricane Bob?

Damage from Hurricane Bob was extensive, totaling approximately US$1.5 billion in 1991 dollars. Adjusted for inflation, this is equivalent to about US$3.5 billion in 2026. Some sources estimated the damage could have been as high as US$3 billion in contemporary dollars. The storm was one of the costliest United States hurricanes at the time, with most damage occurring in New England due to high winds, storm surge, and flooding.

Why is Hurricane Bob significant for Canada?

Hurricane Bob is significant for Canada as its remnants transitioned into an extratropical cyclone and moved across parts of Atlantic Canada in August 1991. The system brought impacts to New Brunswick and Newfoundland after crossing Maine. The Canadian Hurricane Centre issued warnings for the Maritime provinces. The storm serves as an example of how tropical systems can affect eastern Canada and the importance of monitoring storms that move northward along the eastern seaboard.

Will there ever be another hurricane named Bob?

No, there will never be another Atlantic hurricane named Bob. The name was officially retired by the World Meteorological Organization following the destructive 1991 season. This is a standard practice for storm names that are associated with significant damage or loss of life. The retirement ensures the name is not reused in future seasonal name lists, which rotate every six years.

Sources: Wikipedia and current public reporting, checked by the Your Space Hamilton desk. Last updated 2026-10-20.