1988 Atlantic hurricane season

A shear-bound summer, then three intense hurricanes

The National Hurricane Center tracked 19 tropical cyclones in 1988, of which 12 reached tropical storm strength and 5 became hurricanes, against a 50-year average of 9.5 storms and 5.6 hurricanes. The site's archive gives the same 12 tropical storms and 5 hurricanes, with 3 major, 1 Category 5 and an accumulated cyclone energy of 105.6. Gilbert, Helene and Joan all reached one-minute winds of 64 m/s or more, the first time three hurricanes had done so in one season since 1961.

Strong upper-level shear broke up vigorous African waves in June and July, and weaker shear in August let them develop. A depression that crossed Cuba in late May and early June brought the archive's first tropical-stage observation on 31 May. Its rains, peaking above 40 inches in Cienfuegos Province, caused 37 deaths in Cuba.

Forecasts improved sharply. The NHC's official track errors ran 30 to 40 percent below the previous ten-year average, helped by the smooth tracks of Gilbert, Helene and Joan. The 24, 48 and 72 hour forecasts were the most accurate in more than 18 years.

Gulf Coast storms in August and early September

Tropical Storm Alberto formed off South Carolina and reached storm strength on 7 August just south of Nantucket, then crossed Nova Scotia with little effect. Tropical Storm Beryl formed over southeastern Louisiana, drifted into the Gulf and back, and brought up to 300 mm of rain to the central Gulf Coast. The NHC attributed one drowning in Alabama to Beryl. Chris spent a week as a depression, dropping heavy rain on Puerto Rico where three people died, and became a tropical storm just 12 hours before crossing the coast north of Savannah on 28 August. A tornado it spawned killed one person in South Carolina.

The southern part of the wave that produced Chris became Hurricane Debby in the Bay of Campeche. Debby reached hurricane strength on 2 September, the season's first hurricane, and came ashore six hours later near Tuxpan. Press reports cited 10 deaths in Mexico from flooding and mudslides. Its circulation crossed Mexico into the Pacific.

Hurricane Florence formed in the south-central Gulf on 7 September and reached hurricane strength just before landfall over southeastern Louisiana on 9 September. It stayed a hurricane for only 12 hours. The NHC reported a surge of 1 to 2 m east of the landfall point, one fisherman killed in Mobile Bay and damage of about $2.5 million, mostly in southeastern Louisiana.

Hurricane Gilbert's record pressure

Gilbert formed east of the Lesser Antilles on 8 September and became a hurricane south of Puerto Rico on 10 September. Its center passed along the length of Jamaica on 12 September with a pressure near 960 mb, and the airport near Kingston measured a one-minute wind of 52 m/s. It was the first hurricane to strike Jamaica since Charlie in 1951.

Back over water, Gilbert passed about 30 km south of Grand Cayman and deepened from 962 mb to 888 mb in 23 hours, reaching that minimum at 2152 UTC on 13 September. The NHC called 888 mb a record for the Western Hemisphere; only Typhoon Tip's 870 mb had been lower worldwide. The archive places Gilbert's peak one-minute wind of 160 kt at 00 UTC on 14 September.

Gilbert came ashore on the Yucatán Peninsula on 14 September with an estimated one-minute wind of 72 m/s, about 140 kt, still Category 5 but below its peak. After two days over the Gulf it made a final landfall near La Pesca, in northeastern Mexico, late on 16 September with estimated winds of 57 m/s. Its outer bands produced 29 confirmed tornadoes in south Texas.

The NHC estimated 318 deaths: 202 in Mexico, 45 in Jamaica, 30 in Haiti, 12 each in Guatemala and Honduras, 5 each in the Dominican Republic and Venezuela, 3 in the United States and 2 each in Costa Rica and Nicaragua. It put damage at $2 billion each in Jamaica and Mexico and about $5 billion internationally, in 1988 dollars. Later totals give a lower $2.98 billion in 1988 dollars. Gilbert's name was retired.

Helene at sea, Joan in Nicaragua and a late Keith

Hurricane Helene formed from an African wave on 19 September and stayed over the open Atlantic, observed only by satellite. It reached 125 kt on 23 September and remained a hurricane for nine days, the longest of the year. Tropical Storm Isaac formed east of Barbados at the end of September and dissipated quickly in shear.

Hurricane Joan took an unusually southern path along the north coast of Venezuela, over the Netherlands Antilles and across Colombia's Guajira Peninsula, and became a hurricane on 17 October about 60 km off the Colombian coast. It looped in the southwest Caribbean, then strengthened and crossed the coast at Bluefields, Nicaragua, early on 22 October at its peak: 932 mb and estimated winds of 64 m/s, about 125 kt. The NHC said no hurricane that far south had been recorded with such winds. Joan crossed Central America and became Tropical Storm Miriam in the eastern Pacific.

The NHC attributed 216 deaths to Joan: 148 in Nicaragua, 28 in Costa Rica, 25 in Colombia, 11 in Venezuela and 4 in Panama. It estimated total damage at $2 billion in 1988 dollars, nearly half in Nicaragua; later totals give $1.87 billion. The name Joan was retired with Gilbert.

Tropical Storm Keith, the last storm, formed in the western Caribbean on 17 November, crossed the northeastern Yucatán Peninsula and came ashore near Sarasota, Florida, early on 23 November. It raised a 1.8 m surge at Bradenton and Fort Myers Beach, and the NHC estimated Florida damage at $3 million. Keith passed north of Bermuda and became extratropical on 24 November.