Hurricane Genevieve (2020)

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Map key
Saffir–Simpson scale
  Tropical depression (≤38 mph, ≤62 km/h)
  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
Storm type
Disc Plain black.svg Tropical cyclone
Solid black.svg Subtropical cyclone
ArrowUp.svg Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

On August 10, the NHC noted the possibility of an area of low pressure forming near Central America within the next few days. [3] On August 13, a tropical wave entered the Eastern Pacific basin from Central America. [1] Later that day, the NHC's forecast was realized, as a trough of low pressure developed just offshore Central America, in association with the tropical wave. [4] The disturbance gradually organized, and on August 16, the system became a tropical depression, receiving the designation Twelve-E at 15:00  UTC. [5] The depression rapidly strengthened and became a tropical storm 6 hours later at 21:00 UTC, receiving the name Genevieve. [6] Genevieve continued to strengthen rapidly overnight as it developed an inner core, and the storm became a Category 1 hurricane on August 17, reaching 1-minute sustained winds of 75 mph (121 km/h). [7] [8] Genevieve continued to rapidly intensify as it began to grow an eye along with well-defined banding features, later that day. [9] By 03:00 UTC the next day, Genevieve had intensified into a Category 2 hurricane, as strong outflow became evident and the eye began to grow, though it remained clouded. [10] Just 6 hours later, Genevieve became a Category 3 hurricane, as an eyewall and a well-defined eye became visible. [11]

Three hours later, at 12:00 UTC on August 18, Genevieve intensified further into a Category 4 hurricane, and the storm reached its peak intensity, with maximum 1-minute sustained winds of 130 mph (210 km/h) and a minimum central pressure of 950 millibars (28 inHg). [1] [12] Later that day, as Genevieve maintained its intensity, imagery showed an almost-circular eye, along with a well-defined inner core. [13] [14] On the next day, Genevieve began to weaken, with no signs of an eyewall replacement cycle, hinting at weakening possibly due to a cold wake left behind by Hurricane Elida, earlier that month. Genevieve continued a gradual weakening trend for the next several hours, [15] but later that day, data from an NHC Reconnaissance Flight indicated that Genevieve was rapidly weakening, with the storm dropping to Category 1 status by 21:00 UTC that day. [16] On August 20, Genevieve turned northwestward and passed very close to Cabo San Lucas, at the southern tip of the Baja California Peninsula, and the system weakened further into a tropical storm at 18:00 UTC. [17] By 21:00 UTC on August 21, Genevieve had degenerated into a post-tropical cyclone, after having no deep convection near its center for 12 hours. [18] At 12:00 UTC on August 22, Genevieve's remnant low dissipated. [1] However, Genevieve's remnant circulation continued to persist for another couple of days, stalling off the coast of Southern California on August 23. [19] Genevieve's remnants dissipated by 00:00 UTC on August 25. [20]

Preparations and impact

Mexico

Hurricane Genevieve strengthening while dropping heavy rainfall over southwestern Mexico, on August 17 Genevieve 2020-08-17 1730Z.jpg
Hurricane Genevieve strengthening while dropping heavy rainfall over southwestern Mexico, on August 17

As Hurricane Genevieve rapidly intensified on August 17, the Government of Mexico issued a tropical storm watch for southern areas of Baja California Sur. [21] This was later raised to a tropical storm warning the next day, [22] and a hurricane warning on August 19. [23] These advisories were subsequently discontinued as the storm weakened and moved away from the Baja California Peninsula on August 21. [24] An estimated 8 million people were threatened by the hurricane across the west coast of Mexico. Accordingly, approximately 1,600 shelters were opened nationwide: 571 in Jalisco, 434 in Nayarit, 237 in Colima, 179 in Michoacán, and 175 in Baja California Sur. [25] Even without officials asking residents to do so, residents of Baja California prepared for damaging winds. [26]

Thunderstorms associated with the outer bands of Genevieve produced gusty winds and heavy rain in Oaxaca, with accumulations averaging 3.0 to 5.9 in (75 to 150 mm) and gusts reaching 43 to 50 mph (70 to 80 km/h). [27] Four people were killed in the state: [28] two from landslides in Huautla de Jiménez and two from swollen rivers. [29] Water reached a depth of 1.6 ft (0.5 m) in Puerto Ángel. [30] The Caminos y Aeropistas de Oaxaca deployed 32 personnel to repair damage to roads. [27] Emergency declarations were issued for 13 municipalities. [29] Localized flash flooding impacted parts of Acapulco, with cars washed away and some homes inundated. [31] Large swells impacted the coast of Jalisco. [32] Fourteen families were relocated in Cihuatlán. [28]

Heavy rainfall impacted much of Baja California Sur as Genevieve brushed the state; accumulations peaked at 11 in (280 mm) in Cabo San Lucas. [33] In the mountainous terrain south of Cabo San Lucas, wind gusts reached 90 mph (140 km/h). [32] Electrical and road infrastructure was damaged statewide, [33] and some areas were without power for more than 24 hours. [34] A lifeguard drowned while attempting to save a teen who also died after ignoring warning flags prompted by rough surf produced by Genevieve, at a resort in Cabo San Lucas. [35] On August 23, the Coordinación Nacional de Protección Civil declared a state of emergency for the municipalities of La Paz and Los Cabos. This allowed the distribution of government aid and supplies to affected residents. [33] Heavy machinery was used to clear roads of debris and mud left behind by floods. [36] Economic losses in Mexico reached $50 million (2020 USD), due to Genevieve. [2]

United States

On August 22, moisture from Hurricane Genevieve's remnants brought heavy rainfall to parts of Southern California, which continued until August 24. [37] [38] This brought fears of wildfires in the region, due to the potential for lightning storms; the region was already being impacted by fires produced by Tropical Storm Fausto's thunderstorms just days earlier. [39] [40] [41] On August 22, a red flag warning was put in effect for most of coastal California. [42] Fortunately, lightning strikes ignited only three small fires, which were able to be brought under control, near the larger SCU Lightning Complex fires. [43] However, thunderstorms produced by Genevieve worsened conditions for firefighters battling three other wildfires in the San Francisco Bay Area. [38] A peak wind gust of around 35 mph (56 km/h) was reported along Interstate 580 on August 22. [44] Despite this, no monetary damages were reported in association with Genevieve in the United States. [45]

See also

Notes

  1. ↑ This includes an unnamed tropical storm in July 2020.

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<span class="mw-page-title-main">Tropical Storm Beta (2020)</span> Atlantic tropical storm in 2020

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<span class="mw-page-title-main">Hurricane Enrique (2021)</span> Category 1 Pacific hurricane in 2021

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<span class="mw-page-title-main">Hurricane Beatriz (2023)</span> Category 1 Pacific hurricane in 2023

Hurricane Beatriz was a Category 1 Pacific hurricane that caused widespread flooding along much of the Pacific coast of southwestern Mexico in late June and early July 2023. The second named storm and second hurricane of the 2023 Pacific hurricane season, Beatriz developed from an area of low pressure that first formed offshore of southern Mexico on June 25. The disturbance was slow to organize, but due to the impending threat it posed to the Mexican coast, advisories were initiated on it as Potential Tropical Cyclone Two-E at 03:00 UTC on June 29. The system organized into a tropical depression six hours later. Later that day, the depression strengthened into a tropical storm and was named Beatriz. Closely paralleling the coast of Mexico, Beatriz rapidly intensified into a hurricane at 15:00 UTC on June 30. The storm peaked in intensity shortly after with maximum sustained winds of 85 mph (137 km/h) and a minimum barometric pressure of 992 mbar (29.3 inHg). Early on July 1, the hurricane's center brushed the coast near Punta San Telmo, after which it steadily lost organization. Beatriz weakened to a tropical storm shortly thereafter, and the system dissipated entirely by 18:00 UTC that day offshore of Cabo Corrientes.

References

  1. 1 2 3 4 Richard J. Pasch; David P. Roberts (September 10, 2020). Tropical Cyclone Report: Hurricane Genevieve (PDF) (Report). Miami, Florida: National Hurricane Center. Retrieved December 27, 2020.
  2. 1 2 "Global Catastrophe Recap October 2020" (PDF). AON Benfield. November 11, 2020. p. 12. Retrieved November 12, 2020.
  3. ↑ John Cangialosi (August 10, 2020). "Five-Day Graphical Tropical Weather Outlook". www.nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved August 16, 2020.
  4. ↑ Robbie Berg (August 13, 2020). "Five-Day Graphical Tropical Weather Outlook". www.nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved August 16, 2020.
  5. ↑ Dan Brown (April 13, 2021). "Tropical Depression Twelve-E Public Advisory Number 1". www.nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved May 13, 2021.
  6. ↑ Dan Brown (August 16, 2020). "Tropical Storm Genevieve Public Advisory Number 2". www.nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved August 16, 2020.
  7. ↑ Andrew Latto (August 17, 2020). "Tropical Storm Genevieve Discussion Number 5". www.nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved August 17, 2020.
  8. ↑ Stacy R. Stewart (August 17, 2020). "Tropical Storm Genevieve Discussion Number 3". nhc.noaa.gov. National Hurricane Center. Retrieved December 23, 2020.
  9. ↑ Daniel Brown (August 17, 2020). "Hurricane Genevieve Discussion Number 6". nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved December 23, 2020.
  10. ↑ Stacy R. Stewart (August 18, 2020). "Hurricane Genevieve Discussion Number 7". nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved December 23, 2020.
  11. ↑ Jack Beven (August 18, 2020). "Hurricane Genevieve Discussion Number 8". nhc.noaa.gov. National Hurricane Center. Retrieved December 23, 2020.
  12. ↑ David Zelinsky (August 18, 2020). "Hurricane Genevieve Intermediate Advisory Number 8A". www.nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved August 18, 2020.
  13. ↑ John Cangialosi (August 18, 2020). "Hurricane Genevieve Discussion Number 10". nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved December 23, 2020.
  14. ↑ John Cangialosi (August 18, 2020). "Hurricane Genevieve Advisory Number 10". nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved December 23, 2020.
  15. ↑ Daniel Brown (August 19, 2020). "Hurricane Genevieve Duscussion Number 13". www.nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved August 20, 2020.
  16. ↑ Daniel Brown (August 19, 2020). "Hurricane Genevieve Discussion Number 14". www.nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved August 20, 2020.
  17. ↑ Andrew Latto (August 20, 2020). "Tropical Storm Genevieve Intermediate Advisory Number 17A". www.nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved August 20, 2020.
  18. ↑ Daniel Brown (August 21, 2020). "Post-Tropical Cyclone Genevieve Discussion Number 22". www.nhc.noaa.gov. Miami, Florida: National Hurricane Center. Retrieved August 22, 2020.
  19. ↑ "WPC Surface Analysis valid for 08/23/2020 at 21 UTC". wpc.ncep.noaa.gov. Weather Prediction Center. August 23, 2020. Retrieved August 25, 2020.
  20. ↑ "WPC Surface Analysis valid for 08/25/2020 at 00 UTC". wpc.ncep.noaa.gov. Weather Prediction Center. August 25, 2020. Retrieved August 25, 2020.
  21. ↑ Daniel Brown (August 17, 2020). Hurricane Genevieve Advisory Number 6 (Report). National Hurricane Center. Retrieved October 19, 2020.
  22. ↑ David Zelinsky (August 18, 2020). Hurricane Genevieve Intermediate Advisory Number 8A (Report). National Hurricane Center. Retrieved October 19, 2020.
  23. ↑ Daniel Brown (August 19, 2020). Hurricane Genevieve Advisory Number 13 (Report). National Hurricane Center. Retrieved October 19, 2020.
  24. ↑ Daniel Brown (August 21, 2020). Tropical Storm Genevieve Intermediate Advisory Number 20A (Report). National Hurricane Center. Retrieved October 19, 2020.
  25. ↑ "Más de ocho millones de mexicanos, en riesgo por huracán Genevieve". El Informador (in Spanish). EFE. August 18, 2020. Retrieved October 19, 2020.
  26. ↑ "Hurricane warning in Mexico's Baja California as Genevieve to give close pass". Fox News. Fox News. August 19, 2020.
  27. 1 2 Ángel Camarena (August 17, 2020). "Deja daños leves Huracán Genevieve en Oaxaca" (in Spanish). TVBUS Noticias. Retrieved October 19, 2020.
  28. 1 2 "Genevieve deja seis muertos y daños en plena recuperación turística en México" (in Spanish). Telemundo Utah. August 19, 2020. Retrieved October 19, 2020.
  29. 1 2 "En Oaxaca, lluvias provocadas por 'Genevieve' dejan cuatro muertos" (in Spanish). MSN News. Tele Diario. August 19, 2020. Retrieved October 19, 2020.
  30. ↑ "Lluvias Provacan Inundaciones el La Costa de Oaxaca" (in Spanish). 24 Horas. August 16, 2020. Retrieved October 19, 2020.
  31. ↑ "Intensas lluvias en Acapulco dejan inundaciones, autos arrastrados y deslaves". El Sud Californiano (in Spanish). August 20, 2020. Retrieved October 19, 2020.
  32. 1 2 "Hurricane Genevieve Grazed Mexico's Southern Baja Peninsula With Flooding Rain, High Winds (RECAP)". The Weather Channel. August 20, 2020. Retrieved October 19, 2020.
  33. 1 2 3 Laura Gerardo (August 23, 2020). "Emiten declaratoria de emergencia para La Paz y Los Cabos, BCS por 'Genevieve'" (in Spanish). El Debate. Retrieved October 19, 2020.
  34. ↑ "[Galería] Lluvias por Genevieve inundan centro de Cabo San Lucas". El Sud Californiano. August 20, 2020. Retrieved October 19, 2020.
  35. ↑ "Tropical Storm Genevieve kills two people in western Mexico". Al Jazeera English. Al Jazeera English.
  36. ↑ "Rehabilita Servicios Públicos Calles Afectadas por Lluvias en Los Cabos" (in Spanish). El Informante. August 23, 2020. Retrieved October 19, 2020.
  37. ↑ Jonathan Erdman (August 22, 2020). "Hurricane Genevieve May Be Gone, But Its 'Ghost' May Bring More Thunderstorms to Fire-Ravaged California". weather.com. The Weather Company . Retrieved August 22, 2020.
  38. 1 2 Harriet Rowan (August 24, 2020). "Bay Area weather: Red flag warning and unhealthy air as forecasters warn of lightning, winds". timesheraldonline.com. Times Herald. Retrieved December 23, 2020.
  39. ↑ Gary Robbins (August 22, 2020). "Thunderstorms could spark wildfires in Southern California on Sunday". The San Diego Union-Tribune . Retrieved December 23, 2020.
  40. ↑ "Cal Fire 72 hour activity". twitter.com. Retrieved August 20, 2020.
  41. ↑ "Moisture from Tropical Storm Fausto fuels NorCal thunderstorms". KTLA. August 16, 2020. Retrieved August 16, 2020.
  42. ↑ "Plume Of Topical Weather Triggers Red Flag Warning For Fire-Ravaged Northern California". sanfransisco.cbslocal.com. KPIX 5. August 22, 2020. Retrieved December 23, 2020.
  43. ↑ "Storm Events Database". National Centers for Environmental Information. August 23, 2021. Retrieved January 27, 2021.
  44. ↑ "Storm Events Database". National Centers for Environmental Information. August 22, 2020. Retrieved January 27, 2021.
  45. ↑ "Storm Events Database". National Centers for Environmental Information. August 23, 2020. Retrieved January 27, 2021.
Hurricane Genevieve
Genevieve 2020-08-18 2015Z.jpg
Genevieve at peak intensity offshore Mexico on August 18
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