This is an independent research/prototype tool, not an official source. Warnings, watches, and the official forecast for this storm come from the National Hurricane Center.

Final data: 2026-08-27 00:00 UTC — Iselle is no longer being actively tracked (Tropical Depression). See the RI climatology or the marine heatwave map for current activity.

Tropical Depression IselleEP092026

Peak 60 kt · Recorded 2026-08-21 12:00 UTC – 2026-08-27 00:00 UTC · 18 cycles archived

60 kt peak

Final position 22.7°N 124.9°W · last moving WNW at 9 kt · final pressure 1003 mb · final advisory 14, 2026-08-26 21:00 UTC

SHIPS data captured 2026-08-22 12:00 UTC – 2026-08-26 18:00 UTC · Peak intensity 60 kt · 18 cycles archived

hover the chart to inspect a moment

Environmental history across Iselle's recorded life. Shaded band(s) mark the same rapid-intensification episode(s) shown in the RI badge above (identical computation, ≥30 kt/24 h merged episodes from best track). Shaded span covers all qualifying 24 h windows, so it can extend past the intensity peak. The SHIPS-RII lane is the forecast probability issued at each cycle, not an observed value. Hover to inspect any moment across every lane at once.