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Hurricane Bob (1991)

Hurricane Bob was a Category 3 hurricane at its peak, with 115 mph winds and a lowest pressure of 950 mb, per NOAA's National Hurricane Center. Modeled winds reached tropical-storm force (39 mph) at 13 of the cities we track; the strongest was Providence, RI, with a modeled peak gust of 81 mph.

Peak strength115 mph winds (1-minute)
Category 3
Cities with tropical-storm-force windsModeled, of the cities we track
13
LandfallsFirst August 19, 1991
3
Lowest pressure
950 mb

Track, wind field and cities

Select a piece of the track or a city for details.

  • Depression or weaker
  • Tropical storm
  • Hurricane, Category 1 or 2
  • Major hurricane, Category 3 to 5
  • Landfall
  • City (larger ring, stronger modeled gust)
  • Modeled wind field, 39 to 111 mph sustained (darker, stronger; orange 111 mph+)
Source: NOAA/NWS National Hurricane Center best track (HURDAT2). City winds and the wind field are modeled.

The shaded areas are where our model puts Hurricane Bob’s sustained winds over open land at 39 mph or more (tropical-storm force), 58, 74 (hurricane force) and 111 mph (major hurricane force) at some point along its track. Modeled, not measured. How we model hurricane winds

Landfalls

  1. August 19, 1991, Category 2 at 104 mph, about 35 miles from Norwich, CT
  2. August 19, 1991, Category 2 at 98 mph, about 29 miles from Providence, RI
  3. August 20, 1991, tropical storm at 69 mph, about 63 miles from Portland, ME

Modeled winds at cities (13)

Estimated peak winds for open, flat ground at each city’s center. Not measurements. How we model hurricane winds

CityPeak gustSustainedClosest passPeak
Providence, RI81 mph66 mph15 milesAug 19, 1991, 1:35 PM EDT
Norwich, CT78 mph63 mph35 milesAug 19, 1991, 1:20 PM EDT
Boston, MA75 mph61 mph15 milesAug 19, 1991, 2:30 PM EDT
Virginia Beach, VA68 mph55 mph87 milesAug 19, 1991, 1:45 AM EDT
Worcester, MA66 mph53 mph48 milesAug 19, 1991, 2:00 PM EDT
Atlantic City, NJ62 mph50 mph85 milesAug 19, 1991, 7:45 AM EDT
New Haven, CT60 mph49 mph66 milesAug 19, 1991, 1:20 PM EDT
Hartford, CT59 mph48 mph68 milesAug 19, 1991, 1:20 PM EDT
Springfield, MA57 mph47 mph75 milesAug 19, 1991, 2:00 PM EDT
Portland, ME57 mph46 mph20 milesAug 19, 1991, 5:30 PM EDT
Manchester, NH56 mph46 mph55 milesAug 19, 1991, 3:15 PM EDT
Waterbury, CT55 mph45 mph78 milesAug 19, 1991, 2:00 PM EDT
Bridgeport, CT55 mph44 mph75 milesAug 19, 1991, 2:00 PM EDT

What happened

Bob tracked parallel to the mid-Atlantic coast toward New England. Its eye crossed Block Island, Rhode Island, at 1:20 p.m. EDT on August 19, 1991, then moved over Newport near 2 p.m. EDT as a Category 2 hurricane.1 NHC's best track gives 90-knot (104 mph) winds and a 962 mb central pressure at Block Island, and 85-knot (98 mph) winds and 964 mb at the Newport landfall.2 The center crossed Rhode Island and Massachusetts and made a final landfall as a tropical storm near Rockland, Maine, at 9:30 p.m. EDT.1

The highest surge came where wind pushed water into Buzzards and Narragansett bays. High water marks at the head of Buzzards Bay ran 8.5 to 15.3 feet, and surge was 5.8 feet at Woods Hole and at the New Bedford hurricane barrier.3 In Rhode Island, high water marks near Sakonnet Point reached 10.2 to 16.5 feet with waves, and the Providence hurricane barrier gauge recorded a 6.5-foot surge.3 NWS Boston lists gusts of 125 mph in Brewster and North Truro on Cape Cod, where North Truro also had the highest sustained wind, 100 mph. Block Island reported a 91-knot (105 mph) gust, at the upper limit of its equipment.4,5 On Cove Road in Mattapoisett, 29 of 37 homes were destroyed, and 32 of 35 shoreline homes were lost at Angelica Point.4

NHC estimated Bob's total damage at $1.5 billion and counted 17 deaths, including 6 in Connecticut.3

Best track (55 positions)

TimeStatusWindPressurePosition
Aug 16, 00:00 UTCTropical depression29 mph1014 mb25.6°N, 74.3°W
Aug 16, 06:00 UTCTropical depression29 mph1012 mb25.7°N, 74.9°W
Aug 16, 12:00 UTCTropical depression35 mph1010 mb25.9°N, 75.4°W
Aug 16, 18:00 UTCTropical storm40 mph1005 mb26.4°N, 75.8°W
Aug 17, 00:00 UTCTropical storm46 mph1003 mb27.1°N, 76.2°W
Aug 17, 06:00 UTCTropical storm52 mph998 mb27.8°N, 76.5°W
Aug 17, 12:00 UTCTropical storm63 mph996 mb28.4°N, 76.9°W
Aug 17, 18:00 UTCCategory 1 hurricane75 mph986 mb29.0°N, 77.1°W
Aug 18, 00:00 UTCCategory 1 hurricane81 mph980 mb29.7°N, 77.0°W
Aug 18, 06:00 UTCCategory 1 hurricane86 mph979 mb30.5°N, 76.9°W
Aug 18, 12:00 UTCCategory 1 hurricane92 mph974 mb31.5°N, 76.6°W
Aug 18, 18:00 UTCCategory 2 hurricane98 mph965 mb33.0°N, 76.1°W
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