Hurricane Hermione

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Hurricane Hermione
Category 1 hurricane ( SSHWS )
Hermione on September 1st in the Gulf of Mexico
Hermione on September 1st in the Gulf of Mexico
Emergence August 28, 2016
resolution September 6, 2016
Peak wind
speed
80  mph (130  km / h ) (sustained for 1 minute)
Lowest air pressure 983  mbar ( hPa ; 29  inHg )
dead 4 direct, 1 indirect
Property damage Unknown
Affected
areas
Cuba , Florida
Season overview:
Atlantic hurricane season 2016

Hurricane Hermione was a tropical cyclone that threatened northwest Florida and eventually the east coast of the United States . The ninth tropical depression of the 2016 Atlantic hurricane season was its eighth named storm and fourth hurricane. Evolving from a long-tracked tropical wave that previously crossed the Lesser and Greater Antilles , Hermione is the first hurricane to land in Florida since Hurricane Wilma in 2005 . Hermione is also the first hurricane to form in the Gulf of Mexico since Hurricane Ingrid in 2013 .

Storm course

Past train track
Predicted train path

On August 18, the National Hurricane Center (NHC) first indicated a tropical wave about 480 km southwest of Cabo Verde that had the potential for tropical cyclogenesis and was associated with an area of ​​disorganized atmospheric convection. The conditions in the area were expected to be favorable for further development. Dry and stable air were initially a hindrance to development, although convection and circulation were increasingly better defined on August 21. On August 23, the system developed an elongated and ill-defined circulation; this was found during a mission by the Hurricane Hunters. On the following day, the low pressure area crossed Guadeloupe and reached the Caribbean Sea with strong winds . At that time, the NHC was of the opinion that the system could develop into a tropical low pressure area at any time, since this only lacks a well-developed circulation.

Marginal wind shear disrupted the organization of the system, and it passed Puerto Rico north without further development; on August 25 the wind speeds fell below 34 kn . The depression crossed the southern Bahamas with sporadic convection, was better defined on August 27, and was approaching the north coast of Cuba. Wind shear prevented faster development, although conditions near the Gulf of Mexico became more favorable. On August 28, the convection increased and gained organization. Later that day, the Hurricane Hunters observed good circulation, so the NHC began issuing Tropical Depression Nine warnings on August 28th at 9:00 p.m. UTC, about halfway between the Florida Keys and the north coast of Cuba located. The deep convection intensified further as the low pressure area penetrated further into the Gulf of Mexico, steered there by a high pressure ridge over southern Florida, although it continued to appear torn and the convection was displaced from the circulation. Dry air in the west of the system canceled out the effects of the warm water favorable for development. On August 30th, too, the depression failed to organize itself better, and the circulation near the ground and mid-altitude did not stay aligned. A large plume of convection developed over the system on August 31 as the discharge improved and the wind shear decreased. During the course of the day, reports from the Hurricane Hunters revealed that the low pressure area about 640 km southwest of Apalachicola, Florida Apalachicola, Florida had intensified into Tropical Storm Hermione.

Late on August 31st, Hermione began accelerating northeast through a subtropical trough over the southeastern United States. Early on September 1st, based on data from aerial reconnaissance, the NHC determined that wind speeds of 120 km / h could be assumed and that Hermione had intensified into a hurricane as a result. Shortly before the landfall near Saint Marks , Florida at around 05:30 UTC with sustained wind speeds of 130 km / h, the hurricane hunters determined a central air pressure of 982 mbar. The wind field in hurricane strength reached up to 75 km and in storm force up to 280 km from the center.

Preparations and implications

While it was still in the development phase, the precursor gravure area dumped between 75 and 130 mm of rain over northern Cuba. Candelaria in western Cuba recorded 311 mm of rainfall. The rains improved the drought situation and contributed to the replenishment of the water reservoirs, but also caused landslides. The Embalse Zaza - the largest reservoir in the island state - increased its water volume by around 14 million m³, which corresponds to around 30% of its capacity. In Batabanó on the south coast, the southerly winds and 215 mm of rain caused moderate flooding. In and near Havana the power supply was switched off to avoid accidents; Damage occurred to the gas supply.

On August 30, the NHC issued a Hurrikanvorwarnung for the coast between Indian Pass to the mouth of the Anclote River and a Sturmvorwarnung westwards to Countygrenze Walton - Bay of. A storm warning was issued the next day between the Anclote River and Walton Bay county border, and the Atlantic coastline between Marineland, Florida and Altamaha Sound in Georgia was put under an advance warning. At 03:00 UTC on September 1, a hurricane warning was issued for Florida between the mouth of the Suwannee River and Mexico Beach . At the same time, the warning was extended northwards to the mouth of the South Santee River in South Carolina . Six hours later, the advance warning between Marineland and the South Santee River was converted to a storm warning, and the warning northward was added to the coast between the confluence of the South Santee River and Surf City, North Carolina .

The tropical storm warnings were extended at 15:00 UTC along the Atlantic coast for the section from Marineland beyond the mouth of the South Santee River to Surf City, and a storm warning was then extended to the coast between Surf City and Oregon Inlet in North Carolina, including the Pamlico Sound . On the Florida Gulf Coast, the storm warning was extended two hours later south to Englewood , including the Tampa Bay Area .

supporting documents

  1. ^ Stacy Stewart: Tropical Weather Outlook ( English ) National Hurricane Center. August 18, 2016. Retrieved August 28, 2016.
  2. Jack Beven: Tropical Weather Outlook ( English ) National Hurricane Center. August 19, 2016. Retrieved August 28, 2016.
  3. ^ Stacy Stewart: Tropical Weather Outlook ( English ) National Hurricane Center. August 21, 2016. Retrieved August 28, 2016.
  4. ^ Todd Kimberlain: Tropical Weather Outlook ( English ) National Hurricane Center. August 23, 2016. Retrieved August 28, 2016.
  5. ^ Todd Kimberlain: Tropical Weather Outlook ( English ) National Hurricane Center. August 24, 2016. Retrieved August 28, 2016.
  6. ^ Daniel Brown: Tropical Weather Outlook ( English ) National Hurricane Center. August 24, 2016. Retrieved August 28, 2016.
  7. ^ Daniel Brown: Tropical Weather Outlook ( English ) National Hurricane Center. August 24, 2016. Retrieved August 28, 2016.
  8. Jack Beven: Tropical Weather Outlook ( English ) National Hurricane Center. August 25, 2016. Retrieved August 28, 2016.
  9. ^ Daniel Brown: Tropical Weather Outlook ( English ) National Hurricane Center. August 25, 2016. Retrieved August 28, 2016.
  10. ^ Robbie Berg: Tropical Weather Outlook ( English ) National Hurricane Center. August 27, 2016. Retrieved August 28, 2016.
  11. ^ A b Lixion Avila: Tropical Weather Outlook ( English ) National Hurricane Center. August 27, 2016. Retrieved August 28, 2016.
  12. ^ Daniel Brown: Tropical Weather Outlook ( English ) National Hurricane Center. August 28, 2016. Retrieved August 28, 2016.
  13. Michael Brennan: Tropical Weather Outlook ( English ) National Hurricane Center. August 28, 2016. Retrieved August 28, 2016.
  14. Michael Brennan: Tropical Depression Nine Discussion Number 1 ( English ) National Hurricane Center. August 28, 2016. Retrieved August 28, 2016.
  15. ^ Richard Pasch: Tropical Depression Nine Discussion Number 4 ( English ) National Hurricane Center. August 29, 2016. Retrieved August 29, 2016.
  16. ^ A b Stacy Stewart: Tropical Depression Nine Discussion Number 6 ( English ) National Hurricane Center. August 30, 2016. Accessed August 31, 2016.
  17. ^ Richard Pasch: Tropical Depression Nine Discussion Number 5 ( English ) National Hurricane Center. August 29, 2016. Retrieved August 31, 2016.
  18. ^ Richard Pasch: Tropical Depression Nine Discussion Number 9 ( English ) National Hurricane Center. August 30, 2016. Accessed August 31, 2016.
  19. ^ Stacy Stewart: Tropical Depression Nine Discussion Number 10 ( English ) National Hurricane Center. August 31, 2016. Accessed August 31, 2016.
  20. ^ Richard Pasch: Tropical Storm Hermine Intermediate Advisory Number 12A ( English ) National Hurricane Center. August 31, 2016. Accessed August 31, 2016.
  21. ^ Richard Pasch: Tropical Storm Hermine Discussion Number 13 ( English ) National Hurricane Center. August 31, 2016. Accessed September 1, 2016.
  22. Michael Brennan, Richard Pasch: Hurricane Hermine Tropical Cyclone Update 0155 CDT ( English ) National Hurricane Center. September 1, 2016. Retrieved September 2, 2016.
  23. a b Alertan de inundaciones repentinas en Cuba por intensas lluvias (Spanish) , Marti Noticas. August 30, 2016. Accessed August 31, 2016. 
  24. Temporal de lluvias provoca inundación en una localidad costera (Spanish) , El Mundo. August 30, 2016. Accessed August 31, 2016. 
  25. ^ Richard Pasch: Tropical Depression NINE. nhc.noaa.gov, August 30, 2016, accessed September 6, 2016 .
  26. ^ Richard Pasch: Tropical Depression NINE. nhc.noaa.gov, August 31, 2016, accessed September 6, 2016 .
  27. ^ Richard Pasch: Tropical Depression NINE. nhc.noaa.gov, August 31, 2016, accessed September 6, 2016 .
  28. Stacy Stewart: Tropical Storm HERMINE. nhc.noaa.gov, September 1, 2016, accessed September 6, 2016 .
  29. Lixion Avila: Tropical Storm HERMINE. nhc.noaa.gov, September 1, 2016, accessed September 6, 2016 .
  30. ^ Richard Pasch: Tropical Storm HERMINE. nhc.noaa.gov, September 1, 2016, accessed September 6, 2016 .
  31. ^ Richard Pasch: Tropical Storm HERMINE. nhc.noaa.gov, September 1, 2016, accessed September 6, 2016 .