The 1979 Atlantic hurricane season was the first Atlantic hurricane season to include both male and female names on its list of tropical cyclone names. The season officially began on June 1, and lasted until November 30. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. Despite a high amount of tropical depressions forming, it was a slightly below average season in terms of named storms, with nine systems reaching tropical storm intensity. The first system, an unnumbered tropical depression, developed north of Puerto Rico on June 9. Two days later, Tropical Depression One formed and produced severe flooding in Jamaica, with 41 deaths and about $27 million (1979 USD) in damage. Tropical Storm Ana caused minimal impact in the Lesser Antilles. Hurricane Bob spawned tornadoes and produced minor wind damage along the Gulf Coast of the United States, primarily in Louisiana, while the remnants caused flooding, especially in Indiana. Tropical Storm Claudette caused flooding in Puerto Rico, Texas, and the Midwestern United States that left eight deaths and at least about $750 million in damage.
The most intense tropical cyclone of the season was Hurricane David. It moved across the Lesser Antilles in late August, with the worst hit islands being Dominica and Martinique. The storm then strengthened further and struck Dominican Republic as a Category 5 hurricane. David was the strongest and deadliest tropical cyclone to make landfall in that country since 1930. In Dominican Republic alone, the system caused approximately 1,000 deaths and $1 billion in damage. Later, David brought wind damage, tornadoes, and flooding to portions of the East Coast of the United States. Overall, the storm resulted in 2,078 deaths and $1.54 billion in damage. Hurricane Frederic brought destruction to the Gulf Coast of the United States, especially in Alabama and Mississippi.
Tropical Storm Elena brought flooding to the Greater Houston area, with five deaths and about $10 million in damage. However, little impact was reported elsewhere. Hurricane Henri remained offshore in the Gulf of Mexico and disrupted efforts to stop the Ixtoc I oil spill. Henri also caused flooding in portions of Mexico. In mid and late-September, a tropical depression caused flooding in the Southern United States, especially Texas. Four deaths were reported, two in Texas and two in Kentucky. Toward the end of October, a brief hurricane force subtropical storm struck Newfoundland, but left little impact. Other than Tropical Depression One and the tropical depression that brought flooding to the Southern United States in mid and late-September, none of the other depressions caused significant effects of land. Collectively, the tropical cyclones of the season resulted in $4.07 billion in damage and at least 2,149 deaths.
Seasonal summary
The Atlantic hurricane season officially began on June 1, 1979. Although 26 tropical systems were observed, only 16 reached the level of tropical or subtropical depression, and nine of them reached tropical storm intensity, which is slightly below the 1950-2000 average of 9.6 named storms per season. Of the nine tropical storms, five of them strengthened into a hurricane, which is also slightly below average. Two of the five hurricanes became major hurricanes, which is Category 3 or greater on the Saffir–Simpson hurricane wind scale. Collectively, the cyclones of the 1979 Atlantic hurricane season caused at least 2,149 fatalities and $4.07 billion in damage.
Despite their intensities, Tropical Depression One and an unnumbered one in September also caused deaths. Additionally, the former inflicted about $27 million in damage from severe flooding in Jamaica. The last storm of the season, an unnumbered tropical depression, dissipated on November 15, about 15 days before the official end of hurricane season on November 30.
Tropical cyclogenesis began in June, with three tropical depressions, one of which strengthened into Tropical Storm Ana. A total of four systems formed in the month of July, including Hurricane Bob and Tropical Storm Claudette. Activity briefly halted after Tropical Depression Six dissipated on August 6 and lasted until Hurricane David developed on August 25. There were four other tropical cyclones that month, including Hurricane Frederic and Tropical Storm Elena. In September, six systems developed, with the named storms of the month being hurricane Gloria and Henri. October was slightly less active, with four tropical cyclones, one of which was an unnamed subtropical storm. Two additional tropical depressions developed in November, the second of which dissipated on November 15.
The season's activity was reflected with an accumulated cyclone energy (ACE) rating of 93. ACE is a metric used to express the energy used by a tropical cyclone during its lifetime. Therefore, a storm with a longer duration will have high values of ACE. It is only calculated at six-hour increments in which specific tropical and subtropical systems are either at or above sustained wind speeds of 39 mph (63 km/h), which is the threshold for tropical storm intensity.
Systems
Tropical Depression One
A tropical wave in the western Caribbean situated south of Grand Cayman developed into a tropical depression on June 11. Tracking generally northward, the depression passed west of Jamaica. On June 12, the depression peaked with maximum sustained winds of 35 mph (55 km/h) system, having never reached tropical storm status. The following day, it made landfall in Cuba. Early on June 14, the depression emerged into the western Atlantic Ocean and then moved parallel to the east coast of Florida for a few days. The depression made another landfall in South Carolina on June 16 and dissipated hours later.
The slow movement of the depression to the west of Jamaica resulted in torrential rainfall, peaking at in Friendship, a city in Westmoreland Parish. Throughout western Jamaica, about 1,000 homes were destroyed or severely damaged, while up to 40,000 people were rendered homeless. The city of New Market was submerged for at least six months. Crops, electricity, telephones, buildings, and railways also suffered damage during the disaster. There were 40 deaths and approximately $27 million in damage. The depression also brought heavy precipitation to the Bahamas and Cuba. Along the East Coast of the United States, light rainfall, strong winds, and rough seas were observed. In South Carolina, a person went missing and was later presumed to have drowned after their boat was torn loose from its mooring.
Tropical Storm Ana
A tropical wave exited the west coast of Africa and entered the Atlantic on June 14. It headed westward and after satellite imagery indicated a closed circulation, the wave was classified as a tropical depression on June 19, while located several hundred miles east-southeast of the Windward Islands. The system was the first tropical cyclone to develop east of the Lesser Antilles in June since the 1933 Trinidad hurricane.
A United States Air Force reconnaissance aircraft noted that the depression was strengthening and by early on June 22, it was upgraded to Tropical Storm Ana. Thereafter, the storm began tracking almost due westward toward the Lesser Antilles. Ana peaked with winds of 60 mph (95 km/h), before wind shear began detaching deep convection from the center, resulting in weakening. Early on June 23, the storm struck St. Lucia and then fell to tropical depression intensity upon entering the Caribbean Sea. Ana continued weakening and degenerated back into a tropical wave on June 24, while located between Puerto Rico and Venezuela. Despite directly crossing St. Lucia, only light rainfall occurred. In Dominica, rain fell for 15 hours and gusty winds were reported.
Hurricane Bob
A tropical wave developed into a tropical depression in the southwestern Gulf of Mexico on July 9. Tracking in a general northward direction, favorable conditions allowed for quick strengthening. Less than a day after formation, the system reached tropical storm intensity, thus being named Tropical Storm Bob and becoming the first Atlantic tropical storm with a male name, followed by hurricane intensity on July 11. Shortly after strengthening into a hurricane, Bob reached its peak intensity with maximum sustained winds of . At the same intensity, Bob made landfall west of Grand Isle, Louisiana, and rapidly weakened after moving inland. However, the resulting tropical depression persisted for several days as it paralleled the Mississippi and Ohio rivers. On July 16, the system emerged into the western Atlantic, where it was subsequently absorbed by a nearby low-pressure area.
Widespread offshore and coastal evacuations took place along the Gulf Coast of the United States in preparation for Hurricane Bob. Effects from the hurricane on the United States were mostly marginal and typical of a minimal hurricane. The cyclone produced a moderate storm surge, damaging some coastal installments and causing coastal inundation. Strong winds were also associated with Bob's landfall, though no stations observed winds of hurricane force. The winds downed trees and blew out windows, in addition to causing widespread power outages. Heavy rainfall was also reported in some locations, peaking at in Louisiana. Further inland, the torrential rains led to flooding in Indiana, resulting in more considerable damage as opposed to the coast. Bob also spawned eight tornadoes, with two causing significant damage. Overall, Bob was responsible for one death and $20 million in damage.
Tropical Storm Claudette
A tropical wave spawned a tropical depression east of the Lesser Antilles on July 16. It gradually strengthened into Tropical Storm Claudette on July 17 and crossed the northern Leeward Islands later that day. As the storm approached Puerto Rico early on July 18, it weakened back to a tropical depression. Claudette degenerated back into a tropical wave after crossing Puerto Rico. Late on July 18, the remnants struck the Dominican Republic and emerged into the Caribbean Sea on the following day. The system crossed western Cuba on July 21, shortly before reaching the Gulf of Mexico and regenerated into a tropical cyclone. By July 23, Claudette regained tropical storm intensity and turned northward. The storm made landfall near the Texas-Louisiana border later that day. It eventually dissipated over West Virginia on July 29.
In the Lesser Antilles, the storm brought heavy rainfall and gusty winds to several islands. Minor flooding occurred in Saint Croix. Rainfall exceeding 10 in (250 mm) in some areas of Puerto Rico led to widespread agricultural damage, flooded homes and streets. There was one fatality and approximately $750,000 in damage. Up to of rain fell in one day in Alvin, Texas, which was then the record 24‑hour precipitation amount for any location in the United States. Within the state of Texas alone, hundreds of businesses and an estimated 15,000 homes sustained flood damage. Rice crops were also ruined. Six drowning deaths was reported in the state, five of which occurred following a vehicular accident that pushed a bus into a swollen creek. In Louisiana, extensive coastal flooding occurred, with miles of roads battered or destroyed in Cameron Parish, while several boats capsized. At Johnson Bayou, fishing camps and homes suffered damage or destruction. Farther inland, other states experienced freshwater flooding, especially Indiana and Missouri, with one indirect fatality in the latter. Overall, Claudette was responsible for eight deaths and $750 million in losses.
Hurricane David