Hurricane Inga (1969)

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Hurricane Inga
Category 3 hurricane ( SSHWS )
Inga on October 2, 1969
Inga on October 2, 1969
Emergence September 20th
resolution 15th October
Peak wind
speed
115  mph (185  km / h ) (sustained for 1 minute)
Lowest air pressure 964  mbar ( hPa ; 28.5  inHg )
dead
Property damage Unknown
Affected
areas 		Bermuda
Season overview:
1969 Atlantic hurricane season

Hurricane Inga of 1969 is the third longest duration hurricane in the Atlantic since reliable weather records began. The eleventh tropical cyclone and ninth named storm of the 1969 Atlantic hurricane season developed in the mid-Atlantic on September 20 and then moved westward. After reaching the strength of a tropical storm, the system collapsed into a low pressure area, but intensified again a few days later. The storm finally peaked on October 5, with wind speeds equivalent to Category 3 of the Saffir-Simpson Hurricane Wind Scale, which was later introduced . Ingas' track was very irregular. The hurricane changed its direction and intensity several times. The hurricane broke up on October 15, 25 days after it formed. Despite its longevity, the hurricane caused little damage and remained largely over the open Atlantic Ocean .

Storm course

Train track from Hurricane Inga

On September 20, a tropical fault developed into a tropical depression in the central Atlantic Ocean. The next morning, the National Hurricane Center (NHC) found that the system had intensified into a tropical storm and that its center was about 1,500 km east-southeast of San Juan , Puerto Rico . At this point the storm was moving westward at a forward speed of 23 km / h. At this stage Inga was a very small tropical cyclone; the radius of the strong winds was less than 160 km. On September 23, however, the storm was disorganized and dispersed. During the day Inga was downgraded to a tropical depression.

The depression continued to move west-northwest, past the Leeward Islands to the north, before drifting northwest. Inga again achieved tropical storm status on September 28, but was still far east of the Bahamas . Inga continued to intensify, reaching 0:00 UTC on September 30,  at which point it was migrating in a northeasterly direction. The storm then changed its direction of movement abruptly but steadily to the south and finally completed a complete loop when Inga again took a westerly direction. The controlling air currents were weak, so that the hurricane moved slowly forward. Late on October 3, Inga swiveled northwest, still as a Category 1 hurricane on today's Saffir – Simpson hurricane wind scale. The storm then arched northeast and intensified into a Category 2 hurricane at 0:00 UTC on October 5.

Inga's position on the US East Coast on October 3

Inga accelerated a little as the center of the hurricane passed Bermuda to the southeast . In the morning hours of October 5th, it was clear that the hurricane did not pose any major threat to the island. At 12:00 UTC on this day, the lowest known air pressure of the hurricane was recorded at 964  mbar . Shortly thereafter, Inga intensified briefly into a severe hurricane (Category 3) and the storm reached its greatest intensity with continuous one-minute wind speeds of 185 km. The storm then reached the more open waters of the Atlantic and moved into a cooler environment, causing Inga to weaken into a Category 1 hurricane on October 6. The forward speed decreased again as cold air got into the circulation and Inga began to lose the tropical properties.

However, Inga intensified again and on October 7th again reached the strength of a Category 2 hurricane. At this point the hurricane was drifting east. The storm then turned south again and began to weaken. In terms of operations, the NHC assumed that Inga lost its hurricane status on October 8th and later reached hurricane status again, but Inga was probably always a hurricane until October 10th. After the hurricane had finally weakened to a tropical storm, Inga again made an arc to the southwest. The storm center became ill-defined and oval shaped as the storm continued to lose power. When Inga again took a westward migration direction, the system was downgraded to a tropical low pressure area. It completely disintegrated on October 15, only about 250 miles from where the system first gained hurricane status.

Impact and weather records

Hurricane Inga existed for approximately 25 days, namely from September 20th to October 15th. This makes Inga the Atlantic hurricane with the third longest recorded duration, after the San Ciriaco hurricane in August and September 1899 and Hurricane Ginger in September and October 1971. Hurricane Kyle (2002) and Hurricane Carrie (1957 ) ranked fourth to sixth ) and Hurricane Inez (1966). However, in 1969, Inga was believed to be the longest-running Atlantic hurricane. The National Hurricane Center issued a total of 72 storm warnings to Inga.

Although the hurricane stayed mostly over the open ocean, the foothills generated wind speeds of 130 km / h in gusts on Bermuda. These strong winds at hurricane strength led to power outages, which were quickly resolved. Residents were asked to be vigilant about whether the hurricane would suddenly change direction and hit the island.

Individual evidence

  1. ↑ a b c d e f g h i j National Hurricane Center: Atlantic hurricane best track (Hurdat) ( English ) Hurricane Research Division. Atlantic Oceanographic and Meteorological Laboratory. National Oceanic and Atmospheric Administrations Office of Oceanic & Atmospheric Research. April 2018. Retrieved May 9, 2018.
  2. ^ Sugg: Tropical Storm Inga Public Advisory Number 1 ( English ) National Hurricane Center. September 21, 1969. Retrieved January 30, 2010.
  3. ^ Simpson: Tropical Storm Inga Public Advisory Number 2 ( English ) National Hurricane Center. September 21, 1969. Retrieved January 30, 2010.
  4. ^ Simpson: Tropical Storm Inga Public Advisory Number 9 ( English ) National Hurricane Center. September 23, 1969. Retrieved January 30, 2010.
  5. ^ Simpson: Tropical Storm Inga Public Advisory Number 19 . National Hurricane Center. September 29, 1969. Retrieved January 30, 2010.
  6. ^ Frank: Hurricane Inga Public Advisory Number 32 ( English ) National Hurricane Center. October 2, 1969. Retrieved January 31, 2010.
  7. ^ Frank: Hurricane Inga Public Advisory Number 36 ( English ) National Hurricane Center. October 3, 1969. Retrieved January 30, 2010.
  8. ^ Frank: Hurricane Inga Bulletin ( English ) National Hurricane Center. October 5, 1969. Retrieved October 27, 2010.
  9. ^ Herbert: Hurricane Inga Public Advisory Number 46 ( English ) National Hurricane Center. October 6, 1969. Retrieved January 30, 2010.
  10. ↑ Hope: Hurricane Inga Public Advisory Number 49 ( English ) National Hurricane Center. October 6, 1969. Retrieved 2010-0130.
  11. ^ Sugg: Hurricane Inga Public Advisory Number 55 ( English ) National Hurricane Center. October 8, 1969. Retrieved January 27, 2010.
  12. ↑ Hope: Hurricane Inga Public Advisory Number 57 ( English ) National Hurricane Center. October 9, 1969. Retrieved January 30, 2010.
  13. ^ Clark: Hurricane Inga Public Advisory Number 64 ( English ) National Hurricane Center. October 10, 1969. Retrieved January 27, 2010.
  14. ↑ Hope: Hurricane Inga Public Advisory Number 72 ( English ) National Hurricane Center. October 12, 1969. Retrieved January 30, 2010.
  15. ↑ a b R.H. Simpson et al .: The Atlantic Hurricane Season of 1969 ( English , PDF; 17.8 MB) Weather Bureau. April 1970. Retrieved January 30, 2010.
  16. ↑ Oldest-Ever Hurricane Goes Strong (English) , The Modesto Bee. September 23, 1971. Retrieved January 30, 2010. 
  17. ↑ Hurricane Inga Hammers Bermuda (English) , The Milwaukee Sentinel. October 6, 1969. Retrieved January 30, 2010. 
  18. ↑ 'Cane Inga Picks up Power (English) , Daytona Beach Morning Journal. October 4, 1969. Retrieved January 27, 2010.