1947 Atlantic hurricane season

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1947 Atlantic hurricane season
Season summary map
First system formed July 31, 1947
Last system dissipated October 22, 1947
Strongest storm "Fort Lauderdale (George)" – 938 mbar (hPa) (27.71 inHg), 145 mph (230 km/h) (1-minute sustained)
Total storms 10
Hurricanes 5
Major hurricanes (Cat. 3+) 2
Total fatalities 94
Total damage $135.3 million (1947 USD)
Atlantic hurricane seasons
1945, 1946, 1947, 1948, 1949

The 1947 Atlantic hurricane season was the first Atlantic hurricane season to have significant tropical cyclones named by the United States Air Force.[1]

The 1947 hurricane season was a fairly active one in terms of landfalling storms. A Category 2 hurricane hit near Tampico, a Category 1 hit near Galveston, and a Category 2 hit near the Georgia/South Carolina border. The most intense and damaging storm was struck Fort Lauderdale as a Category 4 hurricane, then made a second landfall in Louisiana as a high-end Category 2 hurricane.[2]

Storms[edit]

Tropical Storm One[edit]

Tropical storm (SSHS)
Duration July 31 – August 2
Peak intensity 50 mph (85 km/h) (1-min) ≤ 1001 mbar (hPa)

A weak tropical storm moving northwest across the Gulf of Mexico hit just south of the Mexico/United States border on August 2. It dissipated that day after causing $2 million in damage (1947 dollars), mostly crop damage from flooding.

Hurricane Two[edit]

Category 2 hurricane (SSHS)
Duration August 9 – August 16
Peak intensity 110 mph (175 km/h) (1-min) ≤ 977 mbar (hPa)

On August 9, a tropical depression formed in the Caribbean Sea. It moved west-northwest, strengthening into a tropical storm before hitting near Cozumel, Mexico, on August 12 with winds of 50 mph (80 km/h).[2] As it moved through the Bay of Campeche, it quickly strengthened into a Category 2 hurricane and hit just south of Tampico on August 15. The hurricane dissipated the next day over land, causing 19 fatalities.

Hurricane Three[edit]

Category 1 hurricane (SSHS)
Duration August 18 – August 27
Peak intensity 80 mph (130 km/h) (1-min)  984 mbar (hPa)

A tropical depression became a tropical storm over the Florida Straits on August 19. It headed west-northward, intensifying to a first peak of 50 mph (80 km/h) before weakening on August 20. Two days later, the storm hit near Golden Meadow, Louisiana, as a weak tropical storm, but soon turned around and headed back into the Gulf of Mexico. It then turned back toward the coast and steadily strengthened into a minimal hurricane before making landfall near Galveston, Texas, on August 24.[2] The hurricane resulted in $200,000 in damage, as well as one death. It also produced a 3.6-foot (1.1 m) storm surge as it passed offshore of Grand Isle, Louisiana, on August 22.

Hurricane Four (George)[edit]

Category 4 hurricane (SSHS)
Duration September 4 – September 21 (Extratropical on September 21)
Peak intensity 145 mph (230 km/h) (1-min)  938 mbar (hPa)

This powerful hurricane hit the northern Bahamas on September 16 with winds of 120 mph (190 km/h). A day later, it struck Port Everglades in Fort Lauderdale, Florida, with winds of 130 mph (210 km/h) and a central pressure of 943 mb (27.85 inHg).[2] It moved across the Gulf of Mexico as a weakened hurricane, but restrengthened before striking eastern Louisiana on September 19 as a Category 2 hurricane. The hurricane caused $110 million in damage (1947 dollars) and 51 casualties. Although a Category 4 hurricane at its Florida landfall, the storm produced less severe destruction than did previous tropical cyclones in the 1920s. The storm was named George by the Weather Bureau office in Miami, which worked in conjunction with the military at that time.[3]

Tropical Storm Five[edit]

Tropical storm (SSHS)
Duration September 7 – September 8
Peak intensity 60 mph (95 km/h) (1-min) ≤ 1006 mbar (hPa)

A weak tropical storm formed in the northeastern Gulf of Mexico west of the Saint Petersburg/Tampa area on September 7. The short-lived tropical storm peaked at 60 mph (97 km/h) before weakening and making landfall near Dauphin Island, Alabama, on September 8. The system dissipated shortly thereafter.[2]

Tropical Storm Six[edit]

Tropical storm (SSHS)
Duration September 20 – September 26 (Extratropical on September 24)
Peak intensity 65 mph (100 km/h) (1-min)  987 mbar (hPa)

A tropical wave developed into a tropical storm over western Jamaica on September 20. It headed northwestward, hitting Cuba on September 22 with winds of 50 mph (80 km/h). The storm turned north-northeastward over the Gulf of Mexico, strengthening into a strong tropical storm before hitting near Cedar Key on September 23.[2] The storm became extratropical early the next day, after causing tornadic activity amounting to $100,000 in damage (1947 US dollars).

Tropical Storm Seven[edit]

Tropical storm (SSHS)
Duration October 4 – October 9
Peak intensity 60 mph (95 km/h) (1-min) ≤ 1000 mbar (hPa)

On October 6, a wave formed into a tropical storm (possibly a subtropical storm) over the Bahamas. It moved rapidly north-northwestward, and hit near Brunswick, Georgia, on October 7. It looped over Georgia and Florida, and dissipated on October 9.[2]

Tropical Storm Eight[edit]

Tropical storm (SSHS)
Duration October 8 – October 11
Peak intensity 60 mph (95 km/h) (1-min) ≤ 1001 mbar (hPa)

Hurricane Nine (King)[edit]

Category 2 hurricane (SSHS)
Duration October 8 – October 16
Peak intensity 105 mph (165 km/h) (1-min)  965 mbar (hPa)

A tropical low was detected off the coast of Nicaragua on October 8. The low then drifted northward where it became a tropical storm the next day. The tropical storm then passed over the western tip of Cuba, producing a peak wind gust of 57 mph (92 km/h). The storm strengthened over the southeastern Gulf of Mexico to attain hurricane status on October 11, and after brushing the Florida Keys before making landfall near Cape Sable, Florida, on October 12 with winds of 90 miles per hour (140 km/h) and a central pressure of about 975 mb (28.79 inHg)—a strong Category 1 hurricane. The hurricane moved offshore near Pompano Beach and later turned back to the west, toward the Southeastern United States. The storm strengthened as it turned to the west, and on October 15, the hurricane made its final landfall near the Georgia/South Carolina border as a Category 2 hurricane.[2][4][5] The storm was unofficially known as Hurricane King.[4]

An airport in south Florida recorded peak winds of 80 mph (130 km/h). The hurricane dropped 5-13 (12.7–33 cm) inches of rain across central and southern part of the state, including in Hialeah where the storm produced 3.6 inches (7.6 cm) in a one hour period and over 6 inches (15.2 cm) in a 75 minute period. The flooding rains left many neighborhoods in up to six feet of water due to a previously wet summer, and left over 2,000 Miami-Dade County residents homeless. The flooding also closed U.S. 1 from Miami to Fort Lauderdale, as well as a highway to Everglades City. The hurricane spawned a tornado in both Coral Gables and Miami, one of which destroyed three warehouses. In all, the hurricane caused $27.5 million (1947 USD, $260 million 2005 USD) in damage in Florida. Following the passage of the hurricane, Hialeah mayor Henry Milander declared a state of emergency and restricted access to the city. In Miami, many residents had to use boats and rafts to survey damage and look for survivors, due to the flooding. Winds in Georgia peaked at 85 mph (135 km/h) in Savannah, where the storm caused $20 million (1947 USD, $189 million 2005 USD) in damage. Elsewhere in Georgia, the storm caused $500,000 (1947 USD, $4.7 million 2005 USD) in damage, mainly due to a tornado that touched down near Hinesville. Tides twelve feet above normal were reported from Georgia to South Carolina. In Charleston, South Carolina, the high tides caused minor beach erosion and isolated street flooding, and one person was killed there by a falling tree. In North Carolina, the high tides caused minor flooding.[4][6]

The hurricane was noted for the first time hurricane seeding was conducted in the Atlantic basin by the United States Weather Bureau through an operation called Project Cirrus. A B-17 dropped 80 pounds (36 kg) of dry ice onto the storm from 500 feet above its cloudtop after it had moved 350 miles off Jacksonville. Shortly afterward, the storm reversed course and headed for Savannah. The scientists conducting the experiment believed they had caused this change, but it was shown a 1906 hurricane had followed a similar pattern.[7]

Hurricane Ten (Love)[edit]

Category 3 hurricane (SSHS)
Duration October 17 – October 22
Peak intensity 120 mph (195 km/h) (1-min)  961 mbar (hPa)

This storm developed on October 17 over the Leeward Islands as a tropical storm. It moved northwest, bypassing Puerto Rico and strengthening to hurricane status while beginning a gradual curve to the northeast. Hurricane Love was the first storm flown at low-levels by the 53d Weather Reconnaissance Squadron.[8] The storm reached its peak intensity as a Category 3 hurricane just west of Bermuda, bringing winds estimated at 100 mph (175 km/h) to the island. The storm continued northeast and became extratropical on October 22.[2]

Season effects[edit]

Saffir–Simpson hurricane wind scale
TD TS C1 C2 C3 C4 C5
1947 North Atlantic tropical cyclone statistics
Storm
name
Dates active Storm category

at peak intensity

Max 1-min
wind

mph (km/h)

Min.
press.
(mbar)
Areas affected Damage
(millions USD)
Deaths


Depression June 13 – 14 Tropical depression N/A 1003 Mexico None 0
One July 31 – August 2 Tropical storm 50 (85) 1001 Mexico, Texas 2 0
Two August 9 – 16 Category 2 hurricane 110 (175) 977 Mexico Unknown 19
Three August 18 – 27 Category 1 hurricane 80 (130) 984 Cuba, United States Gulf Coast 0.2 0
Depression September 1 – 2 Tropical depression N/A N/A None None 0
Four September 4 – 20 Category 4 hurricane 145 (230) 938 Bahamas, United States Gulf Coast 110 51
Five September 7 – 8 Tropical storm 60 (95) N/A United States Gulf Coast None 0
Depression September 15 – 30 Tropical depression N/A N/A None None 0
Six September 20 – 24 Tropical storm 65 (100) 985 Cuba, United States Gulf Coast 0.1 0
Seven October 4 – 9 Tropical storm 60 (95) 1000 Florida, Georgia None 0
Eight October 8 – 11 Tropical storm 60 (95) 1001 None None 0
Nine October 8 – 16 Category 2 hurricane 105 (165) 965 None 3.26 1
Ten October 17 – 22 Category 3 hurricane 120 (195) 961 Bermuda None 0
Depression October 25 – 26 Tropical depression N/A N/A None None 0
Depression November 28 – December 1 Tropical depression N/A N/A Lesser Antilles, Dominican Republic None 0
Season Aggregates
15 cyclones July 31 – December 1   145 (230) 938 112.3 70

See also[edit]

References[edit]

  1. ^ Dorst, Neal (October 23, 1947). "They Called the Wind Mahina: The History of Naming Cyclones". Hurricane Research Division, Atlantic Oceanographic and Meteorological Laboratory. National Oceanic and Atmospheric Administration. p. Slide 49. 
  2. ^ a b c d e f g h i National Hurricane Center; Hurricane Research Division (April 1, 2014). "Atlantic hurricane best track (HURDAT version 2)". United States National Oceanic and Atmospheric Administration. Retrieved July 9, 2014. 
  3. ^ David M. Roth (2010-01-13). Louisiana Hurricane History. National Weather Service Southern Region Headquarters. p. 36. Retrieved 2011-01-25. 
  4. ^ a b c Barnes, Jay Florida's Hurricane History', University of North Carolina Press (1998), ISBN 0-8078-4748-8, 174 -180
  5. ^ Weather Underground (2006) 1947 Archive URL Accessed: August 15, 2006
  6. ^ 1947 Monthly Weather Review
  7. ^ Whipple, A.B.C. (1982). Storm. Time-Life Books. ISBN 0-8094-4312-0. 
  8. ^ Tom Robison (April 2000). "The B-29 in Weather Reconnaissance". Air Weather Reconnaissance Association. Retrieved 2011-01-25. 

External links[edit]