Hurricane Olaf (2021)

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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

A tropical wave emerged off the northwestern coast of Africa on August 22, 2021, and moved westward across the Atlantic Ocean. The wave fractured over the central Atlantic on August 27, with the northern portion developing into Tropical Storm Kate the following day. The southern portion of the wave continued westward, crossing Central America on September 1, at which time the wave fractured again, with a portion of its northern low-level vorticity center splitting off into the Gulf of Mexico and developing into Tropical Storm Mindy. The parent wave continued into the Eastern Pacific on September 2, and produced disorganized convective activity as it progressed to the south of the Pacific Coast of Mexico, leading to the formation of an area of low pressure on September 5. The low gradually developed a well-defined center and organized convection, leading to the formation of Tropical Depression Fifteen-E by 12:00 UTC on September 7. [1]

Tropical Depression Fifteen-E shortly after formation, on September 8. 2021 CIMSS 15E Fifteen visible infrared satellite loop.gif
Tropical Depression Fifteen-E shortly after formation, on September 8.

The depression's inner-core convection was disheveled for a while after formation, but the cyclone organized and became better defined throughout September 8, as it drifted northward within weak steering currents. [1] [2] At 12:00 UTC on the same day, the cyclone strengthened into a tropical storm and was given the name Olaf. [3] Turning northwestward at a slow pace, Olaf developed banding features and good outflow within very favorable environmental conditions for intensification, featuring warm sea-surface temperatures (SSTs) and low amounts of vertical wind shear. [4] On September 9, the storm developed a well-defined eye and rapidly intensified into a Category 1 hurricane around 12:00 UTC. [1] [5] Olaf intensified at an even quicker rate as it neared to southwestern coast of the Baja California Peninsula, developing a symmetrical eyewall as its winds increased by 20 mph in just six hours. [6] At 02:50 UTC on September 10, Olaf reached peak intensity with maximum sustained winds of 105 mph (169 km/h) and a minimum barometric pressure of 968 millibars (28.6 inHg); the storm made landfall very near San José del Cabo at this time. [7] [8]

Olaf's center briefly crossed Baja California Sur before re-emerging back over water, weakening back to Category 1 status in the process. [9] Shortly after emerging back over water, the organization of Olaf collapsed, including its eye and eyewall, and it was downgraded to a tropical storm by 12:00 UTC. [1] [10] Gradually moving westward away from land, Olaf continued to rapidly weaken, with its low-level center becoming exposed and devoid of any deep convection by 21:00 UTC. [11] By 06:00 UTC on September 11, Olaf had been devoid of any organized deep convection for 12 hours, and was therefore designated a remnant low as it turned back to the southwest. [12] The low continued westward for another day before degenerating into a trough of low pressure on September 12. [1]

Preparations and impact

Hurricane Olaf intensifying near the Baja California Peninsula on September 9. Olaf 2021-09-09 2330Z.jpg
Hurricane Olaf intensifying near the Baja California Peninsula on September 9.

At 03:00 UTC on September 8, tropical storm watches were issued for southern portions of Baja California Sur. [13] These were extended northward at 09:00 UTC before tropical storm warnings were issued for the same areas. [14] These remained until 09:00 UTC on September 9, when hurricane warnings were issued and tropical storm warnings were extended northward. [15] Hurricane and tropical storm warnings were once again extended northward twelve hours later at 21:00 UTC, six hours before landfall. [16] A red alert was issued statewide. [17] Up to 6 in (150 mm) of rainfall was anticipated for the states of Baja California Sur, Sinaloa, and Nayarit as Olaf approached, along with potential surf of up to 23 ft (7.0 m). [18] Before landfall, ports and schools were closed and residents living in flood zones were urged to evacuate. [19] COVID-19 vaccinations were suspended and 20,000 tourists fled to hotels. [20] 20 temporary shelters were set up in Baja California Sur for residents with homes in high-risk areas of impact. [21] Classes in Cabo San Lucas were suspended on September 10. [22]

The Federal Electricity Commission (CFE) of Mexico reported that over 191,000 people lost electricity at the height of the storm. [21] By September 12, with the help of 678 electrical workers, 110 cranes, 212 vehicles and 2 helicopters, power had been restored to 94% of the affected population. [23] Moisture associated with Olaf resulted in heavy rains and flash flooding across the state of Jalisco, causing the collapse of a trailer near Mexican Federal Highway 80 and an associated fatality. [24] Heavy rains from both Olaf and Hurricane Nora, which affected northwestern Mexico less than two weeks prior, prompted the closure of beaches across the neighboring state of Nayarit. [25] Heavy rain, strong winds, and high waves buffeted the southwest coast of the Baja California Peninsula. [26] [27] Olaf brought powerful winds and heavy rainfall to Baja California Sur. Hotels in the state received minor damage, and some motorists were trapped in their vehicles; numerous fallen trees were also reported. [28] A total of thirty-seven airline flights were cancelled due to the hurricane. [29] Damage across Mexico was estimated at MXN$380 million (USD$19 million), with MXN$200 million (USD$10 million) in damage occurring in the municipalities of Los Cabos and La Paz alone. [30] [31]

See also

Notes

  1. ↑ All times are in Coordinated Universal Time, unless otherwise noted
  2. ↑ All monetary values are as of 2021

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<span class="mw-page-title-main">2013 Pacific hurricane season</span> Hurricane season in the Pacific Ocean

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<span class="mw-page-title-main">Timeline of the 2013 Pacific hurricane season</span>

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<span class="mw-page-title-main">Hurricane Sandra (2015)</span> Category 4 Pacific hurricane in 2015

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<span class="mw-page-title-main">Hurricane Genevieve (2020)</span> Category 4 Pacific hurricane in 2020

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<span class="mw-page-title-main">2023 Pacific hurricane season</span> Hurricane season in the Pacific Ocean

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<span class="mw-page-title-main">Timeline of the 2021 Pacific hurricane season</span>

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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 Nora (2021)</span> Category 1 Pacific hurricane in 2021

Hurricane Nora was a large tropical cyclone that caused significant damage across the Pacific Coast of Mexico in late August 2021. The fourteenth named storm and fifth hurricane of the 2021 Pacific hurricane season, Nora was first monitored by the National Hurricane Center (NHC) as an area of low pressure near the coast of Mexico. On August 24, the low organized into tropical depression, but struggled to develop further due to wind shear in its surrounding environment. The depression eventually intensified into a tropical storm and was named Nora as it tracked to the west-northwest. Nora peaked as a strong Category 1 hurricane with maximum sustained winds of 85 miles per hour (140 km/h) on August 28. The storm then grazed the west coast of Mexico and made landfall two separate times, first in the state of Jalisco, followed by neighboring Nayarit. Nora weakened as it interacted with land, dissipating on August 30 just inland of the Mexican coast.

References

  1. 1 2 3 4 5 6 Andy S. Latto (January 10, 2022). Tropical Cyclone Report: Hurricane Olaf (PDF) (Report). Miami, Florida: National Hurricane Center. Retrieved January 10, 2022.
  2. ↑ Berg, Robbie (September 8, 2021). Tropical Depression Fifteen-E Discussion Number 3 (Report). Miami, Florida: National Hurricane Center. Retrieved September 10, 2021.
  3. ↑ Papin, Philippe; Beven, Jack (September 8, 2021). Tropical Weather Outlook (Report). Miami, Florida: National Hurricane Center. Retrieved September 8, 2021.
  4. ↑ Latto, Andrew (September 8, 2021). Tropical Storm Olaf Discussion Number 5 (Report). Miami, Florida: National Hurricane Center. Retrieved September 10, 2021.
  5. ↑ Zelinsky, David (September 9, 2021). Hurricane Olaf Discussion Number 8 (Report). Miami, Florida: National Hurricane Center. Retrieved September 11, 2021.
  6. ↑ Beven, Jack (September 9, 2021). Hurricane Olaf Discussion Number 9 (Report). Miami, Florida: National Hurricane Center. Retrieved September 11, 2021.
  7. ↑ Papin, Philippe; Beven, Jack (September 9, 2021). Hurricane Olaf Discussion Number 10 (Report). Miami, Florida: National Hurricane Center. Retrieved September 11, 2021.
  8. ↑ Papin, Philippe; Beven, Jack (September 9, 2021). Hurricane Olaf Tropical Cyclone Update (Report). Miami, Florida: National Hurricane Center. Retrieved September 10, 2021.
  9. ↑ Berg, Robbie (September 10, 2021). Hurricane Olaf Discussion Number 11 (Report). Miami, Florida: National Hurricane Center. Retrieved September 11, 2021.
  10. ↑ Reinhart, Brad (September 10, 2021). Tropical Storm Olaf Discussion Number 12 (Report). Miami, Florida: National Hurricane Center. Retrieved September 11, 2021.
  11. ↑ Reinhart, Brad (September 10, 2021). Tropical Storm Olaf Discussion Number 13 (Report). Miami, Florida: National Hurricane Center. Retrieved September 11, 2021.
  12. ↑ Berg, Robbie (September 11, 2021). Post-Tropical Cyclone Olaf Discussion Number 15 (Report). Miami, Florida: National Hurricane Center. Retrieved September 11, 2021.
  13. ↑ Papin, Philippe; Beven, Jack (September 7, 2021). Tropical Weather Outlook (Report). Miami, Florida: National Hurricane Center. Retrieved September 10, 2021.
  14. ↑ Papin, Philippe; Beven, Jack (September 8, 2021). Tropical Weather Outlook (Report). Miami, Florida: National Hurricane Center. Retrieved September 10, 2021.
  15. ↑ Papin, Philippe; Beven, Jack (September 9, 2021). Tropical Weather Outlook (Report). Miami, Florida: National Hurricane Center. Retrieved September 10, 2021.
  16. ↑ Papin, Philippe; Beven, Jack (September 9, 2021). Tropical Weather Outlook (Report). Miami, Florida: National Hurricane Center. Retrieved September 10, 2021.
  17. ↑ Leon, Raymundo (September 9, 2021). "Tormenta 'Olaf' provocará lluvias torrenciales en BCS, alerta SMN". La Jornada. Retrieved September 12, 2021.
  18. ↑ "Actividad ciclónica en el océano Pacifico en su región nororiental". 2021-09-09. Retrieved 2021-09-10.
  19. ↑ "Hurricane Olaf makes landfall in Mexico near tourist area". NBC News . 2021-09-09. Retrieved 2021-09-10.
  20. ↑ "Hurricane Olaf hits Mexico's Los Cabos resorts at Category 2". CNBC . 2021-09-09. Retrieved 2021-09-10.
  21. 1 2 "Olaf se debilita a tormenta tropical, tras azotar Baja California Sur con lluvias y vientos" (in Spanish). 2021-09-10. Retrieved 2021-09-10.
  22. ↑ "SRE suspende citas para trámite de pasaporte en BCS por 'Olaf'". La Jornada. September 11, 2021. Retrieved September 12, 2021.
  23. ↑ "CFE restable al 94% la energía en BCS tras paso de Olaf". Adn40. September 12, 2021. Retrieved September 12, 2021.
  24. ↑ "Estilo de vida Lluvias provocadas por "Olaf" causan derrumbe y un muerto en Jalisco". Latinus. September 11, 2021. Retrieved September 12, 2021.
  25. ↑ Santos, Javier (September 11, 2021). "Por 'Olaf', cierran accesos a playas en Nayarit". La Jornada. Retrieved September 12, 2021.
  26. ↑ "'Olaf' se degrada a tormenta tropical en Baja California Sur: trayectoria EN VIVO" (in Spanish). 2021-09-10. Retrieved 2021-09-10.
  27. ↑ "Huracán Olaf toca tierra en Baja California" (in Spanish). 2021-09-10. Retrieved 2021-09-10.
  28. ↑ "20,000 Tourists Stuck in Hotels As Hurricane Olaf Hits Baja California". Newsweek . 2021-09-10. Retrieved 2021-09-10.
  29. ↑ "Hurricane Olaf nears Mexico's Los Cabos resorts". Associated Press . 2021-09-10. Retrieved 2021-09-10.
  30. ↑ Impacto Socioeconómico De Los Principales Desastres Ocurridos En México (PDF) (Report) (in Spanish). Centro Nacional de Prevención de Desastres. June 20, 2023. p. 29. Retrieved November 4, 2023.
  31. ↑ "Huracán "Olaf" dejó daños estimados en 200 millones de pesos en BCS". El Heraldo de Mexico. September 21, 2021. Retrieved September 24, 2021.

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Hurricane Olaf
Olaf 2021-09-09 2010Z.jpg
Hurricane Olaf nearing peak intensity as it approaches Baja California Sur on September 9, 2021.
Tropical cyclones of the 2021 Pacific hurricane season
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