2026 tropical cyclone season · Southern Hemisphere

Cyclone Vaianu Vaianu · SH312026

Cyclone Vaianu was tracked in the Southern Hemisphere from 2026-04-03 to 2026-04-13 (10 days), peaking at 99 kt (H3) with a minimum pressure of 954 hPa. 56 archived forecasts from ECMWF, ECMWF ENS are verified against its best track; at 48 hours the closest was ECMWF, 80 km off on average.

Open the interactive storm map →

ATCF ID
SH312026
Basin
Southern Hemisphere
Tracked
2026-04-03 → 2026-04-13 (10 days)
Peak wind
99 kt · 51 m/s · H3
Minimum pressure
954 hPa
Archived forecasts
56
Sources
ECMWF · ECMWF ENS
TDTSH1H2H3H4H5

Forecast track error (km)

Source24 h48 h72 h120 h
ECMWF59 (14)80 (10)133 (6)—
ECMWF ENS62 (14)109 (10)172 (6)—

Mean great-circle distance to the best track at each lead time, counted while the system was a tropical or subtropical cyclone; the number of cases is in brackets.

Best track

Six-hourly positions of the US best track (JTWC / NHC, one-minute winds); grades on the Saffir–Simpson scale.

Time (UTC)PositionWind (kt)Pressure (hPa)Grade
2026-04-05 00Z13.8°S 171.8°E39994TS
2026-04-05 06Z14.5°S 172.6°E51988TS
2026-04-05 12Z14.9°S 172.4°E54987TS
2026-04-05 18Z15.1°S 172.6°E74973H1
2026-04-06 00Z15.7°S 173.1°E80971H1
2026-04-06 06Z16.1°S 173.6°E89964H2
2026-04-06 12Z16.5°S 173.8°E93959H2
2026-04-06 18Z17.1°S 174.4°E93958H2
2026-04-07 00Z18.1°S 174.8°E99954H3
2026-04-07 06Z19.2°S 175.3°E99954H3
2026-04-07 12Z20.0°S 175.9°E93958H2
2026-04-07 18Z21.1°S 177.0°E89962H2
2026-04-08 00Z22.2°S 177.4°E80970H1
2026-04-08 06Z23.4°S 177.8°E74973H1
2026-04-08 12Z24.6°S 178.4°E64978H1
2026-04-08 18Z25.4°S 178.5°E60980TS
2026-04-09 00Z26.2°S 178.8°E60979TS
2026-04-09 06Z26.8°S 179.0°E54981TS