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Hurricane Jova was a very powerful tropical cyclone that became the first Pacific hurricane to reach Category 5 strength on the Saffir-Simpson scale since Willa in 2018. Jova was also one of the fastest–intensifying tropical cyclones on record in the Eastern Pacific tropical cyclone basin. Jova was the tenth named storm, seventh hurricane, fifth major hurricane and first Category 5 hurricane of the 2023 Pacific hurricane season.
Jova originated from a tropical wave that entered the Pacific Ocean on September 1. The system briskly organized and became a tropical depression the following day. After brief inhibition by wind shear, Jova explosively organized over the next two days. It formed a prominent central dense overcast on September 5 and nascent eye feature, signaling its intensification into a hurricane. In a 24-hour period ending early on September 7, Jova's maximum sustained winds increased by 90 mph (150 km/h) to its peak of 160 mph (260 km/h) and its central pressure fell 67 mbar (hPa; 1.89 inHg) to its minimum of 926 mbar (hPa; 27.43 inHg).[3] This made it a Category 5 hurricane and was one of the five-fastest periods of intensification on record in the basin. Thereafter, an eyewall replacement cycle and decreasing sea surface temperatures caused the storm to steadily weaken. It fell below major hurricane status on September 8 and further weakened to a tropical storm on September 9. The total collapse of convection on September 10 marked its degeneration into a remnant low. The system later dissipated on September 12 as it opened up into a trough.
Jova's expansive cloud shield led to some rainfall in western states of Mexico with minor flooding occurring in Baja California Sur. Large waves and rip currents affected coastal areas from Sinaloa northward to the San Francisco Bay Area in California. Flooding in Arizona inflicted $250,000 in damage.
On August 31, 2023, the National Hurricane Center (NHC) began forecasting the possibility of tropical cyclogenesis off the southwest coast of Mexico. The following day, a tropical wave crossed into the Pacific Ocean near El Salvador. Environmental conditions favored development and the NHC assessed a high likelihood of the system becoming a tropical cyclone within seven days. Convective activity began organizing on September 3 as a broad area of low pressure coalesced. On September 4, the system developed a well-defined surface circulation accompanied by a prominent banding feature to its west. Based on the improved organization, the NHC assessed the formation of Tropical Depression Eleven-E at 21:00 UTC. The environment ahead of the cyclone proved exceptionally conducive to rapid intensification with ample low-level moisture, low wind shear, and high sea surface temperatures. A deep-layer ridge anchored over northern Mexico steered the depression on a west to west-northwest course and would remain the dominant steering factor throughout the cyclone's duration. While initially hampered by moderate wind shear early on September 5, strengthening began later that day as upper-level outflow improved and deep convection blossomed over the system's center. Concurrent with the improved structure, the NHC estimated the system to have reached tropical storm intensity at 09:00 UTC, and the storm received the name Jova.
Formed
September 4, 2023
Remnant low
September 10, 2023
Dissipated
September 14, 2023
September 4, 2023
Remnant low
September 10, 2023
Dissipated
September 14, 2023
1-minute sustained (SSHWS/NWS)
Highest winds
160 mph (260 km/h)
Lowest pressure
926 mbar (hPa); 27.34 inHg
Highest winds
160 mph (260 km/h)
Lowest pressure
926 mbar (hPa); 27.34 inHg
Fatalities
None reported
Damage
$251,000 (2023 USD)
Areas affected
Western Mexico, Baja California peninsula, Southwestern United States
None reported
Damage
$251,000 (2023 USD)
Areas affected
Western Mexico, Baja California peninsula, Southwestern United States
Jova's expansive cloud shield led to some rainfall in western states of Mexico with minor flooding occurring in Baja California Sur. Large waves and rip currents affected coastal areas from Sinaloa northward to the San Francisco Bay Area in California. Flooding in Arizona inflicted $250,000 in damage.
On August 31, 2023, the National Hurricane Center (NHC) began forecasting the possibility of tropical cyclogenesis off the southwest coast of Mexico. The following day, a tropical wave crossed into the Pacific Ocean near El Salvador. Environmental conditions favored development and the NHC assessed a high likelihood of the system becoming a tropical cyclone within seven days. Convective activity began organizing on September 3 as a broad area of low pressure coalesced. On September 4, the system developed a well-defined surface circulation accompanied by a prominent banding feature to its west. Based on the improved organization, the NHC assessed the formation of Tropical Depression Eleven-E at 21:00 UTC. The environment ahead of the cyclone proved exceptionally conducive to rapid intensification with ample low-level moisture, low wind shear, and high sea surface temperatures. A deep-layer ridge anchored over northern Mexico steered the depression on a west to west-northwest course and would remain the dominant steering factor throughout the cyclone's duration. While initially hampered by moderate wind shear early on September 5, strengthening began later that day as upper-level outflow improved and deep convection blossomed over the system's center. Concurrent with the improved structure, the NHC estimated the system to have reached tropical storm intensity at 09:00 UTC, and the storm received the name Jova.
Mexico
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Mexico's Servicio Meteorológico Nacional warned of heavy rains in Baja California Sur, Colima, Jalisco, Nayarit, and Sinaloa stemming from Jova's immense cloud shield. Waves of 6.6–13.1 ft (2–4 m) were expected along the coasts of Colima, Jalisco, Nayarit and Sinaloa. Four beaches in Los Cabos closed due to dangerous conditions. Heavy rains in Baja California Sur swelled small streams, flooded roads, and caused some vehicles to become stranded.
Southwestern United States
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Increased swells produced by Hurricane Jova on September 10 in Pacific Palisades, California
Moisture associated with Jova was pulled into the Southwestern United States by upper-level southwesterly flow, reaching California on September 10. This led to increased humidity in coastal areas. Minimal rainfall was recorded that day in the mountains of southern California. While Doppler weather radar returns showed rain in the region, dryer low- to mid-level air evaporated the rainfall before it reached the ground. Additional moisture reached far northwestern Arizona and southern portions of the Great Basin in Nevada. In the former, flash floods along Short Creek in Colorado City forced the closures of all crossings and damaged the Hildale Street crossing with losses totaling $250,000. In Nevada, some roads were covered with debris when the Meadow Valley Wash flooded. Waves of 5–8 ft (1.5–2.4 m) and rip currents were forecast for south-facing beaches in Los Angeles and Ventura Counties as well as the Channel Islands. This prompted a high surf advisory for the region. The San Francisco Bay Area farther north faced similar risks with rip currents and breaking waves up to 8 ft (2.4 m). Five people were rescued in Ocean Beach, San Francisco, after being pulled to sea by rip currents on September 10.
edit
Mexico's Servicio Meteorológico Nacional warned of heavy rains in Baja California Sur, Colima, Jalisco, Nayarit, and Sinaloa stemming from Jova's immense cloud shield. Waves of 6.6–13.1 ft (2–4 m) were expected along the coasts of Colima, Jalisco, Nayarit and Sinaloa. Four beaches in Los Cabos closed due to dangerous conditions. Heavy rains in Baja California Sur swelled small streams, flooded roads, and caused some vehicles to become stranded.
Southwestern United States
edit
Increased swells produced by Hurricane Jova on September 10 in Pacific Palisades, California
Moisture associated with Jova was pulled into the Southwestern United States by upper-level southwesterly flow, reaching California on September 10. This led to increased humidity in coastal areas. Minimal rainfall was recorded that day in the mountains of southern California. While Doppler weather radar returns showed rain in the region, dryer low- to mid-level air evaporated the rainfall before it reached the ground. Additional moisture reached far northwestern Arizona and southern portions of the Great Basin in Nevada. In the former, flash floods along Short Creek in Colorado City forced the closures of all crossings and damaged the Hildale Street crossing with losses totaling $250,000. In Nevada, some roads were covered with debris when the Meadow Valley Wash flooded. Waves of 5–8 ft (1.5–2.4 m) and rip currents were forecast for south-facing beaches in Los Angeles and Ventura Counties as well as the Channel Islands. This prompted a high surf advisory for the region. The San Francisco Bay Area farther north faced similar risks with rip currents and breaking waves up to 8 ft (2.4 m). Five people were rescued in Ocean Beach, San Francisco, after being pulled to sea by rip currents on September 10.
