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Hurricane Hone ( ) was a fairly long-lived tropical cyclone that impacted the U.S. state of Hawaii in August 2024. The eighth named storm and third hurricane of the 2024 Pacific hurricane season, Hone was also the first tropical cyclone to form in the North Central Pacific tropical cyclone basin since 2019. Hone developed from two disturbances that formed over the northeastern Pacific Ocean in late August 2024. The two disturbances eventually merged into a larger area of disturbed weather on August 20. The merged system steadily became more organized, and the development of persistent deep convection over its center led to its designation as Tropical Depression One-C on August 22. The depression strengthened into a tropical storm six hours later. Hone gradually strengthened as it approached Hawaii from the southeast. On August 25, Hone strengthened into a hurricane while located just south of Hawaii's Big Island. After passing near the islands with maximum sustained winds of , Hone began to weaken as it continued westward away from Hawaii and was absorbed by a low pressure area near the International Date Line on September 1.
Prior to its designation as a tropical depression, the National Hurricane Center and Central Pacific Hurricane Center warned of Hone's potential to bring heavy rainfall and dangerous rip currents to the Hawaiian Islands. The Hawaii County Civil Defense was activated ahead of the storm's anticipated passage. A tropical storm warning was issued for the Big Island, while various flood and wildfire warnings were issued for other parts of the island chain. Hone dropped very heavy rainfall across the island, with some areas seeing 18 inches (460 millimeters) or more fall during the storm's passage just 50 nautical miles south of Ka Lae. Strong waves of up to eighteen feet in height and rip currents buffeted the coast of the island. Overall, Hone resulted in $8.05 million in property and crop damage across Hawaii, primarily on the Big Island.
The next day, wind shear decreased and sea surface temperatures warmed caused by a low-pressure area, causing convection to increase in Hone. Hone regained tropical storm status by later that day as it slowed down and turned toward the north, steered between the low to the northwest and a subtropical ridge to the east. However, convection waned, and Hone degenerated to a post-tropical low on September 1 was absorbed into a low-pressure area.
On August 24, Hawaii Governor Josh Green issued an emergency proclamation for the state. Hawaiian Airlines issued a travel waiver for those with flights to Hilo or Kona on August 24 and 25. Various high school sport and youth outdoors events were cancelled by the Hawaii High School Athletic Association and Department of Land and Natural Resources, respectively. Despite this, the Hawaii Tourism Authority informed travelers that it was still safe to come to the island during Hone's passage, but to avoid outdoor activities. All of Hawaii's campgrounds were closed through August 26 due to the storm, as well as Punaluʻu Beach and Whittington Beach parks. Hawaiʻi Volcanoes National Park's coastal backcountry and Mauna Loa was closed due to tropical storm conditions. As rounds of rain from Hone began to impact the Big Island, flash flood watches were issued there as well. While Hone moved erratically northwest of Hawaii, a tropical storm watch was issued for Kure Atoll, Midway Atoll and part of the Papahanaumokuakea Marine National Monument. The watches were eventually discontinued when Hone was designated an extratropical cyclone by the CPHC.
Life-threatening surf and rip currents impacted Hawaii as well due to Hone. The hurricane generated waves of fourteen to eighteen feet along the eastern shores of the Big Island and Maui. Flooding caused the closure of several roads on the Big Island, including Hawaiian Highway 11. At least 7,200 people lost power within the first few hours of Hone's passage. That number rose to 11,099 by midnight local time on August 25. A total of almost 26,000 people lost electricity due to Hone, the majority of them on the Big Island. However, power was restored to all but 2,000 by the next day. Strong winds and large waves lashed the island as Hone approached. The intense weather from Hone caused several flight cancellations at Hilo International Airport. A large tree fell and blocked all traffic on the Mauna Kea access road. In Maui, strong winds tore the roof off a house. A mudslide also covered part of the Hana Highway near Upper Waikani Falls. Power outages occurred on the islands of Maui and Oahu. A boat ran aground on the western shore of Kauai amidst the storm.
Hawaii County received thirty-eight damage reports, including nine major damage reports, indicating several properties were rendered uninhabitable. A total of $5 million in property damage and $10,000 in crop damage was reported. Hone resulted in $3 million in damage to several roads across the Kau and Puna districts of the Big Island. Downed power lines and utilities also caused several tens of thousands of dollars in damage across multiple Big Island districts and in Honolulu on Oahu. Overall, Hone resulted in $8.04 million in property damage in Hawaii and $10,000 in crop damage.
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