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 Iselle EP092026

Peak 60 kt · Recorded 2026-08-21 12:00 UTC – 2026-08-27 00:00 UTC · 19 cycles archived

SHIPS coverage: 15 of 15 tropical or subtropical 6-hourly fixes (100%)

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

10°N20°N30°N140°W120°W100°W2026-08-21 12:00 UTC · 10.0°N 105.0°W · 20 kt2026-08-21 18:00 UTC · 10.8°N 106.4°W · 20 kt2026-08-22 00:00 UTC · 11.4°N 107.5°W · 20 kt2026-08-22 06:00 UTC · 12.0°N 108.6°W · 20 kt2026-08-22 12:00 UTC · 12.5°N 109.9°W · 25 kt2026-08-22 18:00 UTC · 13.2°N 111.7°W · 30 kt2026-08-23 00:00 UTC · 14.1°N 111.9°W · 35 kt2026-08-23 06:00 UTC · 14.6°N 112.6°W · 40 kt2026-08-23 12:00 UTC · 15.5°N 113.7°W · 40 kt · SHIPS 30 kt/24 h: 29%2026-08-23 18:00 UTC · 16.6°N 114.6°W · 45 kt · SHIPS 30 kt/24 h: 19%2026-08-24 00:00 UTC · 16.8°N 114.9°W · 45 kt · SHIPS 30 kt/24 h: 25%2026-08-24 06:00 UTC · 17.6°N 115.8°W · 50 kt · SHIPS 30 kt/24 h: 27%2026-08-24 12:00 UTC · 18.2°N 116.7°W · 55 kt · SHIPS 30 kt/24 h: 20%2026-08-24 18:00 UTC · 18.9°N 117.6°W · 60 kt · SHIPS 30 kt/24 h: 21%2026-08-25 00:00 UTC · 19.5°N 118.3°W · 60 kt · SHIPS 30 kt/24 h: 18%2026-08-25 06:00 UTC · 20.2°N 119.5°W · 60 kt · SHIPS 30 kt/24 h: 13%2026-08-25 12:00 UTC · 20.7°N 120.6°W · 55 kt · SHIPS 30 kt/24 h: 12%2026-08-25 18:00 UTC · 20.9°N 121.4°W · 50 kt · SHIPS 30 kt/24 h: 8%2026-08-26 00:00 UTC · 21.1°N 122.1°W · 45 kt · SHIPS 30 kt/24 h: 6%2026-08-26 06:00 UTC · 21.5°N 122.9°W · 45 kt · SHIPS 30 kt/24 h: 0%2026-08-26 12:00 UTC · 21.9°N 123.6°W · 40 kt · SHIPS 30 kt/24 h: 0%2026-08-26 18:00 UTC · 22.5°N 124.5°W · 40 kt · SHIPS 30 kt/24 h: 0%2026-08-27 00:00 UTC · 22.8°N 125.5°W · 30 kt · SHIPS 30 kt/24 h: 0%
Observed track
Position from ATCF best track. Hover a point for time, position, wind, and SHIPS RI probability when available.

SHIPS data captured 2026-08-22 12:00 UTC – 2026-08-27 00:00 UTC · Peak intensity 60 kt · 19 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.

Satellite intensity estimates

Best-track windDvorak, TAFB (NHC)ADT (UW-CIMSS)SATCON (UW-CIMSS)Maximum wind (kt) estimated from satellite imagery — estimates, not observations, and not the official intensity. ADT and SATCON: UW-CIMSS, delivered through NHC’s ATCF fix files. Subjective Dvorak from the agency named on each fix.