Near the end of September, a late season tropical wave entered the Atlantic, cruising slowly westward at a low latitude. The disturbance was dwarfed by the strengthening Tropical Storm (and soon Hurricane) Kirk to its northwest, but it still managed to steadily organize and become Tropical Depression Thirteen on October 2. The cyclone had plenty of moisture to work with, but was buffeted by the outflow of Kirk for another few days, so its intensification was gradual. Nevertheless, it strengthened into Tropical Storm Leslie that night and continued to improve its satellite presentation over the coming days.
The storm found a pocket of conditions favorable enough to reach hurricane strength late on October 4. Leslie surpassed nearby Kirk and again set the mark for easternmost formation of a hurricane in the tropical Atlantic post-September, at a longitude of 34.2° W, further evidence of the anomalous warmth of the Atlantic basin. Leslie turned west-northwest and then northwest over the next couple of days and encountered some mid-level try air. It had some success battling off this dry air intrusion for a time, and managed to intensify a bit more on October 6, reaching its first peak intensity of 90 mph winds and a pressure of 982 mb.
The next day, Leslie's structure began to slowly degrade. Although the storm was still producing very deep convection, the core became more lopsided and the maximum winds decreased. The system was downgraded to a tropical storm early on October 8. It rebuilt its eyewall and made a comeback later in the day however, regaining hurricane status. Leslie remained surprisingly resilient and deepened more on October 9. Its eye partially cleared out and it beat its previous strength mark that evening, reaching a new peak intensity as a category 2 hurricane with 105 mph winds and a central pressure of 972 mb.
Upper-level winds from a disturbance to the storm's west increased markedly over Leslie on the 10th, however. This initiated rapid weakening, an the storm also began curving north and then northeast out to sea. By October 11, the cyclone was down to moderate tropical storm strength and was producing convection only sporadically. The next day, Leslie dissipated altogether.
The image above shows Leslie near its second peak intensity as a category 2 hurricane on October 9.
Leslie did not affect land as a tropical cyclone.
No comments:
Post a Comment