Super Typhoon Hinnamnor (2022) with a Record-Breaking Lifespan over the Western North Pacific

ECMWF Ensemble Forecasts of Six Tropical Cyclones That Formed during a Long-Lasting Rossby Wave Breaking Event in the Western North Pacific

“…The last JTWC Working Best Track (WBT) has Tokage as a TS (35 kt) as it approaches 50 • N (Figure 2). Recall that Wang et al [6] presented STY Hinnamnor (12 W) as an example of the current challenges in typhoon research and forecasting. Hinnamnor had an extremely challenging track to forecast (Figure 2).…”

“…Hinnamnor had rapidly intensified from a TS at 0600 UTC 28 August to a TY in only 18 h (Table 1, row 2). The second large track forecast challenge was when Hinnamnor (12 W) turned southward after crossing 130 • E and became quasi-stationary near 22 • N, 125 • E. In conjunction with an eyewall replacement cycle [6], Hinnamnor decreased in intensity from a peak value of 140 kt at 0000 UTC 1 September to 75 kt at 1200 UTC 2 September before re-intensifying to 110 kt at 0600 UTC 4 September (JTWC WBT). As indicated in Figure 2, Hinnamnor continued moving poleward at TY intensity until reaching 40 • N at 0600 UTC 6 September (Table 1, row 2).…”

“…While not a review article, Wang et al (2023) [6] describe another of the six TCs (Super Typhoon Hinnamnor) that formed in association with that summer 2022 longlasting RWB event and exhibited all of the major features that pose current challenges in typhoon research. During the lifecycle of Hinnamnor, it (1) experienced a sudden change of track; (2) underwent a two-phase RI with an intermediate eyewall replacement cycle;…”

“…(3) interacted with another vortex that later merged into the Hinnamnor outer circulation; (4) expanded in size; (5) produced a strong cold wake; (6) underwent rapid weakening; and (7) underwent an extratropical transition. Wang et al [6] describe all of these challenges, and propose that research studies of cases such as Hinnamnor could advance our understanding of the dynamics and physical processes of TCs. Furthermore, Wang et al [6] propose that Hinnamnor could serve as a benchmark for validating different numerical model predictions of typhoon tracks, intensities, and structural changes.…”

“…Wang et al [6] describe all of these challenges, and propose that research studies of cases such as Hinnamnor could advance our understanding of the dynamics and physical processes of TCs. Furthermore, Wang et al [6] propose that Hinnamnor could serve as a benchmark for validating different numerical model predictions of typhoon tracks, intensities, and structural changes. Thus, this study of the six TCs that formed during a long-lasting RWB event during August-September 2022 is contributed to this Special Issue.…”