Hurricane Gladys (1968)
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 | |
| Meteorological history | |
|---|---|
| Formed | October 13, 1968 |
| Dissipated | October 21, 1968 |
| Category 2 hurricane | |
| 1-minute sustained (SSHWS/NWS) | |
| Highest winds | 100 mph (155 km/h) |
| Lowest pressure | 965 mbar (hPa); 28.50 inHg |
| Overall effects | |
| Fatalities | 11 |
| Damage | $18.7 million (1968 USD) |
| Areas affected | Cuba, Southeastern United States (especially Florida), Nova Scotia |
| IBTrACS | |
Part of the 1968 Atlantic hurricane season | |
Hurricane Gladys was the first Atlantic hurricane to be observed each by the hurricane hunters, radar imagery, and photographs from space. The seventh named storm and fifth hurricane (including one unnamed hurricane) of the 1968 season,[1] Gladys formed on October 13 in the western Caribbean from a broad disturbance related to a tropical wave. The storm moved north-northwestward, becoming a hurricane before striking Cuba on October 16. Gladys later reached peak winds of 100 mph (160 km/h) just before making landfall near Homosassa on the western coast of Florida on October 19. The hurricane crossed the state and continued northeastward, passing just east of Cape Hatteras on October 20. The next day, Gladys became extratropical and was absorbed by a cold front over Nova Scotia.
In Cuba, the threat of the hurricane prompted widespread evacuations. Gladys caused flash flooding and heavily damaged the tobacco crop. Damage in the country was estimated at $12 million (1968 USD), and there were six deaths. While passing west of the Florida Keys, the hurricane produced strong winds that briefly cut communications to the Dry Tortugas, but damage was minor. Near where Gladys made landfall, winds gusted to 100 mph (160 km/h) and tides reached 6.5 ft (2.0 m) above normal. There was heavy beach erosion and flooding along the coast, while the winds knocked down trees and caused power outages. Across the state, damage was estimated at $6.7 million (1968 USD), and three people were indirectly killed. Heavy rainfall in South Carolina caused minor river flooding. When paralleling just off the coast of North Carolina, Gladys was responsible for breaking the state's worst drought since 1932, and proved more beneficial than the minor storm damage there. Later, Gladys killed two people in Atlantic Canada and caused coastal damage in Prince Edward Island.
Tropical storm (39–73 mph, 63–118 km/h)
Category 1 (74–95 mph, 119–153 km/h)
Category 2 (96–110 mph, 154–177 km/h)
Category 3 (111–129 mph, 178–208 km/h)
Category 4 (130–156 mph, 209–251 km/h)
Category 5 (≥157 mph, ≥252 km/h)
Unknown
Extratropical cyclone, remnant low, tropical disturbance, or monsoon depressionThe origins of Hurricane Gladys were from a tropical wave – a trough embedded in the trade winds – that moved across the Lesser Antilles on October 6. For the next few days, the wave moved across the Caribbean without any development. As the wave interacted with the Intertropical Convergence Zone, a large area of convection persisted across the region, spawning a series of low-pressure areas. One became a tropical depression near Swan Island offshore Honduras on October 11, and two days later another tropical depression formed near San Andrés island in the extreme southwestern Caribbean. The latter system, which would eventually become Gladys, moved slowly north-northwestward. An anticyclone in the region caused wind shear to decrease, allowing for gradual development. On October 15, a hurricane hunters flight observed winds of 52 mph (84 km/h); on that basis, the National Hurricane Center (NHC) upgraded the depression to Tropical Storm Gladys.[2] Gladys's track and origin were fairly typical of October.[3]
After becoming a tropical storm, Gladys intensified into a hurricane near the Isle of Youth on October 16.[1] Shortly thereafter it crossed the narrow but mountainous region of western Cuba.[2] By the time the hurricane reached the southeastern Gulf of Mexico, a deep trough was moving eastward through the United States toward a weak anticyclone off the east coast. Gladys turned more to the north, passing just west of the Dry Tortugas, before resuming its north-northwest trajectory, possibly due to a mid-level low near Alabama. Around that time, the eye was reorganizing offshore southwestern Florida, and the hurricane failed to intensify significantly due to the eastern portion of the circulation being over the state. Early on October 19, Gladys made landfall near Homosassa after turning to the northeast,[2] with peak winds estimated at 100 mph (160 km/h).[1][4] It accelerated across the state due to the approaching trough, emerging into the Atlantic near St. Augustine. Paralleling the southeastern coast of the United States, Gladys passed just east of Cape Hatteras on October 20, although by that time the strongest winds remained along the eastern periphery. The approaching trough caused Gladys to gradually lose tropical characteristics, and on October 21 Gladys became extratropical just south of Nova Scotia. A few hours later, the former hurricane was absorbed by the cold front.[2]
Hurricane Gladys was active during the Apollo 7 spaceflight mission, and astronauts aboard took several pictures of the hurricane. Later, researchers were able to compare the photographs to airforce reconnaissance data, radar, and local weather networks, the first such hurricane to be observed with such varied data.[5]
Preparations
In advance of the storm, Cuban officials forced about 36,000 residents to evacuate from low-lying areas, along with 35,000 livestock.[6][7] All flights were canceled in and out of Havana during the storm's passage. Many classes were canceled in the region, and workers took steps to minimize damage to the tobacco crop.[8]
Shortly after Gladys became a tropical storm, the NHC issued gale warnings for the Florida Keys and later a hurricane watch for the southwest Florida coast from the Florida Keys to Clearwater. After Gladys entered the Gulf of Mexico, the NHC issued hurricane warnings for the Florida Keys to Cedar Key, with a watch to St. Marks. Later, hurricane warnings were issued from Charleston, South Carolina to Hatteras, North Carolina.[2] Before Gladys made landfall in Florida, all schools in Pinellas County were closed, and officials evacuated 60 jet fighters from MacDill Air Force Base to Mississippi. HMS Sirius, which was visiting St. Petersburg, rode out the storm in the open Gulf of Mexico. The American Red Cross opened shelters across western Florida for people to stay in during the storm,[9] and about 40,000 people evacuated their homes during the storm's passage.[7] Then-governor Claude R. Kirk Jr. ordered 100 Florida guardsmen to assist with storm work.[10] Shelters were set up in North Carolina, although few people evacuated.[7]
