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The 1991 Atlantic hurricane season (SDTWFC What Might Have Been) features what the SDTWFC thought storms would do upon formation. Every storm formed that formed in the real 1991 hurricane season formed. In total, the season was slightly below average, with 12 depressions forming, 9 of which went on to become tropical storms. Of those, only 4 became hurricanes, and Ana was the only major hurricane.

Storms

Saffir-Simpson Hurricane Scale

Tropical depression (NHC)
TD 1 1991 SDTWFC TD 1 1991 SDTWFC Track
DurationJune 30 – July 1
Peak intensity45 km/h (30 mph) (1-min)  1009 hPa (mbar)

Tropical Depression One

(Previously Tropical Storm Ana)
Tropical depression (NHC)
TD 2 1991 SDTWFC TD 2 1991 SDTWFC Track
DurationJuly 2 – July 5
Peak intensity55 km/h (35 mph) (1-min)  1004 hPa (mbar)

Tropical Depression Two

(Previously Tropical Depression Two)
Category 3 tropical cyclone (NHC)
Ana 1991 SDTWFC Ana 1991 SDTWFC Track
DurationAugust 14 – August 25
Peak intensity195 km/h (120 mph) (1-min)  951 hPa (mbar)

Hurricane Ana

(Previously Hurricane Bob)
Tropical storm (NHC)
Bethany 1991 SDTWFC Bethany 1991 SDTWFC Track
DurationAugust 24 – August 26
Peak intensity75 km/h (45 mph) (1-min)  1007 hPa (mbar)

Tropical Storm Bethany

(Previously Tropical Depression Four)
Category 1 tropical cyclone (NHC)
Coryn 1991 SDTWFC Coryn 1991 SDTWFC Track
DurationAugust 28 – September 3
Peak intensity120 km/h (75 mph) (1-min)  991 hPa (mbar)

Hurricane Coryn

(Previously Tropical Depression Five)
Category 1 tropical cyclone (NHC)
Donovan 1991 SDTWFC Donovan 1991 SDTWFC Track
DurationSeptember 4 – September 12
Peak intensity150 km/h (90 mph) (1-min)  984 hPa (mbar)

Hurricane Donovan

(Previously Hurricane Claudette)
Tropical storm (NHC)
Ernie 1991 SDTWFC Ernie 1991 SDTWFC Track
DurationSeptember 7 – September 12
Peak intensity110 km/h (70 mph) (1-min)  993 hPa (mbar)

Tropical Storm Ernie

(Previously Tropical Storm Danny)
Tropical storm (NHC)
Flora 1991 SDTWFC Flora 1991 SDTWFC Track
DurationSeptember 7 – September 9
Peak intensity85 km/h (50 mph) (1-min)  998 hPa (mbar)

Tropical Storm Flora

(Previously Tropical Storm Erika)
Tropical storm (NHC)
Garry 1991 SDTWFC Garry 1991 SDTWFC Track
DurationOctober 15 – October 16
Peak intensity65 km/h (40 mph) (1-min)  1004 hPa (mbar)

Tropical Storm Garry

(Previously Tropical Storm Fabian)
Tropical depression (NHC)
TD 10 1991 SDTWFC TD 10 1991 SDTWFC Track
DurationOctober 24 – October 25
Peak intensity55 km/h (35 mph) (1-min)  1007 hPa (mbar)

Tropical Depression Ten

(Previously Tropical Depression Ten)
Category 2 tropical cyclone (NHC)
Hamilton 1991 SDTWFC Hamilton 1991 SDTWFC Track
DurationOctober 25 – October 29
Peak intensity155 km/h (100 mph) (1-min)  983 hPa (mbar)

Hurricane Hamilton

(Previously Hurricane Grace)
Tropical storm (NHC)
Igor 1991 SDTWFC Igor 1991 SDTWFC Track
DurationOctober 29 – November 1
Peak intensity110 km/h (70 mph) (1-min)  975 hPa (mbar)

Tropical Storm Igor

(Previously Hurricane Twelve/The Perfect Storm)

Storm Names

This was the same list used in the 1985 season as no names were tried from that season. Names not retired will be used again in the 1997 season. Names not used are marked in italics.

  • Ana
  • Bethany
  • Coryn
  • Donovan
  • Ernie
  • Flora
  • Garry
  • Hamilton
  • Igor
  • Jasmine (unused)
  • Karen (unused)
  • Lars (unused)
  • Monica (unused)
  • Nelly (unused)
  • Orion (unused)
  • Peggy (unused)
  • Rosa (unused)
  • Serena (unused)
  • Trudy (unused)
  • Vina (unused)
  • Winter (unused)

Retirement

In 1992, the SDTWFC retired the names Ana and Igor due to the damage and deaths they caused. The names Ariana and Ina were chosen to replace them for the 1997 season.

Season Effects

1991 North Atlantic Ocean statistics
Storm
name
Dates active Storm category

at peak intensity

Max 1-min
wind
mph (km/h)
Min.
press.
(mbar)
Areas affected Damage
(USD)
Deaths


One June 30 - July 1 Tropical depression 35 (55) 1009 Bahamas, Florida none 0
Two July 2 - 5 Tropical depression 35 (55) 1004 Belize, Yucatan Peninsula minimal 1
Ana August 14 - 25 Category 3 hurricane 120 (195) 951 Bahamas, Outer Banks of North Carolina, Virginia, Maryland, Delaware, New York, New Jersey, Connecticut, Rhode Island, Massachusetts, New Hampshire, Vermont, Maine, Nova Scotia 4,200 13 (2)
Bethany August 24 - 26 Tropical storm 45 (75) 1007 none none 0
Coryn August 28 - September 3 Category 1 hurricane 75 (120) 991 Lesser Antilles none 0
Donovan September 4 - 12 Category 1 hurricane 90 (150) 984 none none 0
Ernie September 7 - 12 Tropical storm 70 (110) 993 none none 0
Flora September 7 - 9 Tropical storm 50 (85) 998 none none 0
Garry October 15 - 16 Tropical storm 50 (65) 1004 Cayman Islands, Cuba, Bahamas, Florida 2 0
Ten October 24 - 25 Tropical depression 35 (55) 1007 none none 0
Hamilton October 25 - 29 Category 2 hurricane 100 (155) 983 none none 0
Igor October 29 - November 1 Tropical storm 70 (110) 975 Nova Scotia, Maine, New Hampshire, Massachusetts, New Brunswick 620 27
Season Aggregates
12 June 30 - November 1   120 (195) 951 North Atlantic Ocean 1,822 41 (2)
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