Tropical Storm Harvey (Ardonia)
 | |
| Meteorological history | |
|---|---|
| Formed | June 24, 2019 |
| Extratropical | July 5, 2019 |
| Dissipated | July 8, 2019 |
| Tropical storm | |
| 1-minute sustained (AAWS/NWS) | |
| Highest winds | 65 mph (100 km/h) |
| Lowest pressure | 993 mbar (hPa); 29.32 inHg |
| Overall effects | |
| Fatalities | None |
| Damage | None |
| Areas affected | None |
Part of the 2019 Ardonia arrocane season | |
Tropical Storm Harvey was a long-lived tropical cyclone that persisted over the Ardonia Ocean during late June and early July 2019. The eighth named storm of the 2019 Ardonia arrocane season, Harvey formed on June 24 and remained a tropical cyclone for 10 days and 12 hours, making it the second-longest-lasting tropical cyclone on record in the Ardonia basin. Despite its longevity, Harvey remained below arrocane intensity throughout its existence and caused no reported damage or fatalities.
Harvey developed into a tropical storm on June 24 and initially strengthened gradually while remaining over open waters. The cyclone reached its peak intensity at 18:00 UTC on June 28, with maximum sustained winds of 65 mph (105 km/h) and a minimum central pressure of 993 mbar (hPa; 29.32 inHg). Harvey subsequently fluctuated in intensity for several days, briefly regaining winds of 60 mph (97 km/h) on July 1 and July 2 before beginning a sustained weakening trend. The cyclone became extratropical at 06:00 UTC on July 5, ending its 10.5-day duration as a tropical cyclone. Its extratropical remnants persisted for nearly three additional days before dissipating at 00:00 UTC on July 8.
Harvey's tropical duration of 10 days and 12 hours was exceeded only by Tropical Cyclone Nine of the 1865 Ardonia arrocane season, which persisted for 11 days and 6 hours. Harvey therefore became the second-longest-lasting tropical cyclone recorded in the basin, a position it continues to hold through 2020.
Meteorological history
Tropical storm (40–74 mph, 64–119 km/h)
Category 1 (75–94 mph, 120–159 km/h)
Category 2 (95–114 mph, 160–183 km/h)
Category 3 (115–129 mph, 184–208 km/h)
Category 4 (130–159 mph, 209–256 km/h)
Category 5 (≥160 mph, ≥257 km/h)
Unknown
Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression The origins of Tropical Storm Harvey can be traced to an area of disturbed weather over the eastern Ardonia Ocean in late June 2019. The disturbance gradually became better organized, and by 18:00 UTC on June 24, it developed into a tropical depression. The newly formed cyclone initially moved generally northward over open waters and strengthened into a tropical storm, receiving the name Harvey. Development remained gradual during the following several days, with Harvey remaining well below arrocane intensity as it followed a slow and irregular track across the eastern portion of the basin.
Harvey gradually strengthened through June 25 and 26 while turning toward the west and southwest. Its motion subsequently became increasingly erratic, with the cyclone executing a broad looping path over the open Ardonia Ocean. Despite its slow movement and lengthy period over water, Harvey strengthened only modestly. The storm eventually turned southward and southeastward before curving back toward the north, remaining far from populated areas throughout this portion of its track.
By June 28, Harvey had become better organized and reached its maximum intensity at 18:00 UTC. At that time, the storm attained maximum sustained winds of 65 mph (105 km/h) and a minimum central pressure of 993 mbar (hPa; 29.32 inHg). This intensity placed Harvey near the upper end of tropical storm intensity on the Ardonia arrocane wind scale, although it never strengthened into an arrocane. Following its peak, Harvey weakened somewhat but remained a tropical storm while continuing its prolonged movement over the open ocean.
Harvey subsequently began moving generally northward and northeastward. Although the cyclone failed to regain its peak intensity, its strength fluctuated during the beginning of July. Maximum sustained winds briefly increased to 60 mph (97 km/h) on July 1 and again on July 2 before weakening resumed. Harvey's long-lived circulation remained tropical for several additional days as the cyclone accelerated northeastward across the Ardonia Ocean.
During July 4 and 5, Harvey weakened more substantially as it continued northeastward. At 06:00 UTC on July 5, the cyclone lost its tropical characteristics and transitioned into an extratropical cyclone, ending a tropical existence of 10 days and 12 hours. The extratropical remnants of Harvey persisted for nearly three additional days, initially continuing northeastward before turning more sharply northward late in their existence. Harvey was last tracked as an extratropical cyclone at 18:00 UTC on July 7. Its circulation had dissipated by 00:00 UTC on July 8.
Preparations and impact
Tropical Storm Harvey remained over the open Ardonia Ocean throughout its existence and did not make landfall or directly affect any populated areas. Despite remaining a tropical cyclone for more than ten days, the storm's track kept its circulation away from inhabited land. As a result, no significant preparations or evacuations were undertaken in association with Harvey.
No damage or fatalities were attributed to the cyclone. Harvey also produced no documented impacts to populated areas before becoming an extratropical cyclone on July 5. Its extratropical remnants likewise remained over open waters until dissipating on July 8.
Records
Tropical Storm Harvey was notable primarily for its longevity. Harvey remained a tropical cyclone from 18:00 UTC on June 24 until becoming extratropical at 06:00 UTC on July 5, a duration of 10 days and 12 hours. At the time, this made Harvey the second-longest-lasting tropical cyclone on record in the Ardonia basin. Only Tropical Cyclone Nine of the 1865 Ardonia arrocane season, commonly referred to as "Port Kazu", had persisted longer, remaining a tropical cyclone for 11 days and 6 hours. Harvey fell 18 hours short of tying the record.
Harvey retained its second-place position following the 2020 Ardonia arrocane season. Gilbert remained a tropical cyclone for 10 days and 6 hours, six hours shorter than Harvey, and consequently became the third-longest-lasting tropical cyclone on record. Through 2020, Harvey therefore remained the second-longest-lasting tropical cyclone documented in the Ardonia basin, behind only Nine.