1947 Atlantic hurricane season
|Season summary map|
|First system formed||July 31, 1947|
|Last system dissipated||October 22, 1947|
|Strongest storm1||"Fort Lauderdale (George)" – 938 mbar (hPa) (27.7 inHg), 145 mph (230 km/h) (1-minute sustained)|
|Major hurricanes (Cat. 3+)||2|
|Total damage||$135.3 million (1947 USD)|
|1Strongest storm is determined by lowest pressure|
1945, 1946, 1947, 1948, 1949
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 struck Fort Lauderdale as a Category 4 hurricane, then made a second landfall in Louisiana as a high-end Category 2 hurricane.
- 1 Storms
- 2 Season effects
- 3 See also
- 4 References
- 5 External links
Tropical Storm One
|Tropical storm (SSHWS)|
|Duration||July 31 – August 2|
|Peak intensity||50 mph (85 km/h) (1-min) ≤ 1001 mbar (hPa)|
A low pressure area in the Bay of Campeche developed into a tropical depression at 06:00 UTC on July 31. Moving north-northwestward, the depression deepened into a tropical storm six hours later. The storm then intensified slowly and gradually curved to the northwest. At 00:00 UTC on August 2, the storm attained its peak intensity with maximum sustained winds of 50 mph (85 km/h) and a minimum barometric pressure of 1,001 mbar (29.6 inHg). The latter was observed at Port Isabel, Texas, while the former was estimated based on the pressure-wind relationship. Simultaneously, the cyclone made landfall in Tamaulipas about 25 mi (40 km) south of the Mexico–United States border. The system weakened to a tropical depression by 12:00 UTC on August 2 and dissipated near Reynosa shortly thereafter.
Small craft were advised between the lower and middle coast of Texas were advised to remain in port. The American Red Cross recommended that residents of Port Aransas evacuate as a precaution, but mainly only tourists in the area fled. Record Most of the damage was done to cotton crops, due to heavy rainfall, with up to 9.35 in (237 mm) observed at Raymondville. However, the precipitation was more beneficial than damaging. The storm caused just over $2 million in damage.
|Category 2 hurricane (SSHWS)|
|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). 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.
|Category 1 hurricane (SSHWS)|
|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. 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)
|Category 4 hurricane (SSHWS)|
|Duration||September 4 – September 21 (Extratropical on September 21)|
|Peak intensity||145 mph (230 km/h) (1-min) 938 mbar (hPa)|
A tropical wave developed into a tropical depression about 175 mi (280 km) east-southeast of Dakar, Senegal, early on September 4. Several hours later, the depression strengthened into a tropical storm, which was named George by the United States Air Force in real time. After moving generally westward for several days, the storm failed to intensify significantly and turned northwestward on September 10. By the following day, George finally became a Category 1 hurricane. The storm intensified further over the next few days and later peaked as a Category 4 hurricane with maximum sustained winds of 145 mph (230 km/h) and a minimum barometric pressure of 938 mbar (27.7 inHg). Early on September 16, George weakened to a Category 3 and curved westward while approaching the northern Bahamas. At 19:00 UTC, the hurricane struck the Abaco Islands with winds of 120 mph (195 km/h). In the Bahamas, the storm produced a large storm surge and strong winds, damaging or destroying many homes and docks on the western end of Grand Bahama.
Thereafter, George continued westward and re-intensified into a Category 4 at 12:00 UTC on September 17, just three and a half hours before the storm made landfall near Fort Lauderdale, Florida, with winds of 130 mph (210 km/h). In Florida, advance warnings and stringent building codes were credited with minimizing structural damage and reducing loss of life to 17 people, but nevertheless widespread flooding and coastal damage resulted from heavy rainfall and high tides. Many vegetable plantings, citrus groves, and cattle were submerged or drowned as the storm exacerbated already high water levels and briefly threatened to breach the dikes surrounding Lake Okeechobee. However, the dikes held firm, and evacuations were otherwise credited with minimizing the potential death toll. On the west coast of the state, the storm caused further flooding, extensive damage south of the Tampa Bay area, and the loss of the Cuban fishing vessel Antonio Cerdado offshore Fort Myers, resulting in seven deaths. Damage in Florida reached $31.8 million.
On September 18, the hurricane entered the Gulf of Mexico and threatened the Florida Panhandle. Later, George made landfall southeast of New Orleans, Louisiana, on September 19 as a strong Category 2 with winds of 110 mph (175 km/h). George weakened to a tropical storm later that day, and then a tropical depression on September 20. The cyclone was absorbed by a cold front over Missouri on the following day. Strong winds in the vicinity of Lake Pontchartrain caused water to over-top the levees, leaving some lakefront streets inundated "waist-deep" and many areas of the city under about 2 ft (0.61 m) of water. New Orleans alone suffered about $100 million in damage. The widespread flooding spurred flood-protection legislation and the creation of an enlarged levee system to safeguard the flood-prone area. Some coastal flooding also occurred in Mississippi. The state suffered slightly more than $28.4 million in damage. The storm destroyed 1,647 homes and structurally impacted 25,000 others in both Louisiana and Mississippi. Throughout its path, the hurricane caused $160.2 million in damage and 51 casualties.
Tropical Storm Five
|Tropical storm (SSHWS)|
|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.
Tropical Storm Six
|Tropical storm (SSHWS)|
|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. The storm became extratropical early the next day, after causing tornadic activity amounting to $100,000 in damage (1947 US dollars).
Tropical Storm Seven
|Tropical storm (SSHWS)|
|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.
Tropical Storm Eight
|Tropical storm (SSHWS)|
|Duration||October 8 – October 11|
|Peak intensity||60 mph (95 km/h) (1-min) ≤ 1001 mbar (hPa)|
Hurricane Nine (King)
|Category 2 hurricane (SSHWS)|
|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. The storm was unofficially known as Hurricane King.
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.
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 Boeing B-17 Flying Fortress 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.
Hurricane Ten (Love)
|Category 3 hurricane (SSHWS)|
|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. 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.
|Saffir–Simpson hurricane wind scale|
|Dates active||Storm category
at peak intensity
|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|
|15 cyclones||July 31 – December 1||145 (230)||938||112.3||70|
- 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.
- National Hurricane Center; Hurricane Research Division (July 6, 2016). "Atlantic hurricane best track (HURDAT version 2)". United States National Oceanic and Atmospheric Administration. Retrieved July 27, 2016.
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- "Gulf Area Fears Tropical Storm". Pampa News (Brownsville, Texas). Associated Press. August 1, 1947. p. 1. Retrieved January 21, 2016 – via Newspapers.com.
- "Tropical Storm is Diminishing". The Vernon Daily Record. Associated Press. August 2, 1947. Retrieved January 21, 2016 – via Newspapers.com.
- "Crops Damaged in Gulf Storm". Lubbock Avalanche-Journal. Associated Press. August 3, 1947. Retrieved January 21, 2016 – via Newspapers.com.
- 1947 Monthly Weather Review
- David M. Roth (2010-01-13). Louisiana Hurricane History (PDF). National Weather Service Southern Region Headquarters. p. 36. Retrieved 2011-01-25.
- "Assess Atlantic Hurricane Damage". Lethbridge Herald. September 18, 1947.
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- "Glades Towns In Flood Path". Palm Beach Post. September 21, 1947. pp. 1, 12.
- "Broward County Takes Stock of Storm Damage". Fort Lauderdale Daily News. September 22, 1947. p. 12.
- Will, Lawrence E. (1978). Okeechobee Hurricane and the Hoover Dike. Great Outdoors Publishing. ASIN B0006YT5ZG.
- "Severe Local Storms for September 1947" (PDF). Monthly Weather Review (U.S. Weather Bureau) 75 (11): 183–84. September 1947. Bibcode:1947MWRv...75..183.. doi:10.1175/1520-0493(1947)075<0183:SLSFS>2.0.CO;2. Retrieved 19 July 2012.
- "Hurricane Hits New Orleans". Windsor Daily Star (Ontario, Dominion of Canada). September 19, 1947. pp. 1–2.
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- David M. Roth (2010). Louisiana Hurricane History. National Weather Service (Report). Archived from the original (PDF) on September 5, 2008. Retrieved July 10, 2012.
- Craig C. Colten (2009). Perilous Place, Powerful Storms: Hurricane Protection in Coastal Louisiana. University Press of Mississippi. ISBN 9781604733457.
- Barnes, Jay Florida's Hurricane History', University of North Carolina Press (1998), ISBN 0-8078-4748-8, 174 -180
- Weather Underground (2006) 1947 Archive URL Accessed: August 15, 2006
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