Dianne: 2025 South-West Indian

Dianne reached 50 kt (93 km/h, 58 mph) (TS) in the 2025 South-West Indian season, from 2025-03-26 to 2025-03-30, with track, wind and pressure and 1.0 ACE.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Key Facts

Dianne was a tropical storm at its peak in the 2025 South-West Indian season.
Peak maximum sustained wind was 50 kt (93 km/h, 58 mph), reached on 28 March 2025, and the lowest pressure was 984 hPa.
The track runs from 26 March 2025 to 30 March 2025 with 29 six hourly positions.
Dianne accumulated 1.0 ACE.
1 landfall is recorded, the first on 28 March 2025.

Track

26 March 2025 to 30 March 2025

Dianne formed on 26 March 2025 and its track is coloured by category at each six hourly step, peaking as a tropical storm. Made with Natural Earth and IBTrACS. Ringed points mark landfalls or the latest advisory position.

Wind

Knots, six hourly

Maximum sustained wind in knots every six hours, from 25 kt (46 km/h, 29 mph) at the start to a peak of 50 kt (93 km/h, 58 mph).

Maximum sustained wind of Dianne
Time (UTC)	Wind (kt)
2025-03-26T18:00:00Z	25 kt
2025-03-26T21:00:00Z	n/a
2025-03-27T00:00:00Z	30 kt
2025-03-27T03:00:00Z	n/a
2025-03-27T06:00:00Z	30 kt
2025-03-27T09:00:00Z	n/a
2025-03-27T12:00:00Z	30 kt
2025-03-27T15:00:00Z	n/a
2025-03-27T18:00:00Z	35 kt
2025-03-27T21:00:00Z	n/a
2025-03-28T00:00:00Z	35 kt
2025-03-28T03:00:00Z	37 kt
2025-03-28T06:00:00Z	40 kt
2025-03-28T09:00:00Z	39 kt
2025-03-28T12:00:00Z	45 kt
2025-03-28T15:00:00Z	42 kt
2025-03-28T18:00:00Z	50 kt
2025-03-28T21:00:00Z	45 kt
2025-03-29T00:00:00Z	35 kt
2025-03-29T03:00:00Z	n/a
2025-03-29T06:00:00Z	30 kt
2025-03-29T09:00:00Z	n/a
2025-03-29T12:00:00Z	25 kt
2025-03-29T15:00:00Z	n/a
2025-03-29T18:00:00Z	25 kt
2025-03-29T21:00:00Z	n/a
2025-03-30T00:00:00Z	25 kt
2025-03-30T03:00:00Z	n/a
2025-03-30T06:00:00Z	25 kt

Pressure

hPa, six hourly

Central pressure in hectopascals every six hours, falling to 984 hPa at the lowest.

Central pressure of Dianne
Time (UTC)	Pressure (hPa)
2025-03-26T18:00:00Z	999 hPa
2025-03-26T21:00:00Z	n/a
2025-03-27T00:00:00Z	998 hPa
2025-03-27T03:00:00Z	n/a
2025-03-27T06:00:00Z	997 hPa
2025-03-27T09:00:00Z	n/a
2025-03-27T12:00:00Z	997 hPa
2025-03-27T15:00:00Z	n/a
2025-03-27T18:00:00Z	994 hPa
2025-03-27T21:00:00Z	n/a
2025-03-28T00:00:00Z	992 hPa
2025-03-28T03:00:00Z	993 hPa
2025-03-28T06:00:00Z	989 hPa
2025-03-28T09:00:00Z	992 hPa
2025-03-28T12:00:00Z	986 hPa
2025-03-28T15:00:00Z	992 hPa
2025-03-28T18:00:00Z	984 hPa
2025-03-28T21:00:00Z	993 hPa
2025-03-29T00:00:00Z	992 hPa
2025-03-29T03:00:00Z	n/a
2025-03-29T06:00:00Z	997 hPa
2025-03-29T09:00:00Z	n/a
2025-03-29T12:00:00Z	999 hPa
2025-03-29T15:00:00Z	n/a
2025-03-29T18:00:00Z	1000 hPa
2025-03-29T21:00:00Z	n/a
2025-03-30T00:00:00Z	1000 hPa
2025-03-30T03:00:00Z	n/a
2025-03-30T06:00:00Z	997 hPa

ACE Compared With the 2025 Season

Accumulated cyclone energy of named storms in 2025
Melissa (North Atlantic)	34.3 ACE
Erin (North Atlantic)	31.8 ACE
Vince (South-West Indian)	31.0 ACE
Kiko (Eastern North Pacific)	30.9 ACE
Humberto (North Atlantic)	26.5 ACE
Neoguri (Western North Pacific)	20.8 ACE
Chido (South-West Indian)	20.3 ACE
Ragasa (Western North Pacific)	18.8 ACE
Alfred (South Pacific)	18.5 ACE
Gabrielle (North Atlantic)	18.5 ACE
Courtney (South-West Indian)	15.7 ACE
Taliah (South-West Indian)	14.1 ACE
Narda (Eastern North Pacific)	13.7 ACE
Bheki (South-West Indian)	13.4 ACE
Dikeledi (South-West Indian)	12.8 ACE
Halong (Western North Pacific)	12.7 ACE
Krosa (Western North Pacific)	12.5 ACE
Fung-Wong (Western North Pacific)	10.5 ACE
Priscilla (Eastern North Pacific)	10.5 ACE
Zelia (South-West Indian)	9.7 ACE
Octave (Eastern North Pacific)	9.7 ACE
Kalmaegi (Western North Pacific)	9.7 ACE
Garance (South-West Indian)	9.5 ACE
Iona (Eastern North Pacific)	8.8 ACE
Honde (South-West Indian)	8.2 ACE
Podul (Western North Pacific)	8.2 ACE
Henriette (Eastern North Pacific)	7.9 ACE
Flossie (Eastern North Pacific)	7.7 ACE
Bualoi (Western North Pacific)	7.6 ACE
Errol (South-West Indian)	7.4 ACE
Nakri (Western North Pacific)	7.3 ACE
Sean (South-West Indian)	7.0 ACE
Erick (Eastern North Pacific)	6.7 ACE
Imelda (North Atlantic)	6.0 ACE
Bianca (South-West Indian)	6.0 ACE
Jude (South-West Indian)	5.9 ACE
Koto (Western North Pacific)	5.8 ACE
Kajiki (Western North Pacific)	5.4 ACE
Matmo (Western North Pacific)	4.9 ACE
Danas (Western North Pacific)	4.5 ACE
Co-May (Western North Pacific)	4.3 ACE
Jerry (North Atlantic)	4.2 ACE
Wipha (Western North Pacific)	4.2 ACE
Gil (Eastern North Pacific)	4.2 ACE
Mun (Western North Pacific)	3.9 ACE
Lorena (Eastern North Pacific)	3.9 ACE
Fengshen (Western North Pacific)	3.8 ACE
Ivo (Eastern North Pacific)	3.5 ACE
Shakhti (North Indian)	3.4 ACE
Barbara (Eastern North Pacific)	3.1 ACE
Wutip (Western North Pacific)	2.9 ACE
Juliette (Eastern North Pacific)	2.9 ACE
Ivone (South-West Indian)	2.9 ACE
Cosme (Eastern North Pacific)	2.8 ACE
Fernand (North Atlantic)	2.7 ACE
Sonia (Eastern North Pacific)	2.6 ACE
Rae (South Pacific)	2.6 ACE
Mario (Eastern North Pacific)	2.2 ACE
Dexter (North Atlantic)	2.2 ACE
Dalila (Eastern North Pacific)	2.1 ACE
Nari (Western North Pacific)	2.0 ACE
Seru (South Pacific)	2.0 ACE
Montha (North Indian)	1.9 ACE
Kanto (South-West Indian)	1.8 ACE
Robyn (South-West Indian)	1.8 ACE
Ditwah (North Indian)	1.7 ACE
Lorenzo (North Atlantic)	1.7 ACE
Tapah (Western North Pacific)	1.7 ACE
Raymond (Eastern North Pacific)	1.7 ACE
Elvis (South-West Indian)	1.5 ACE
Ancha (South-West Indian)	1.5 ACE
Alvin (Eastern North Pacific)	1.4 ACE
Bailu (Western North Pacific)	1.4 ACE
Francisco (Western North Pacific)	1.3 ACE
Mitag (Western North Pacific)	1.2 ACE
Keli (Eastern North Pacific)	1.2 ACE
Chantal (North Atlantic)	1.0 ACE
Dianne (this storm)	1.0 ACE
Peipah (Western North Pacific)	1.0 ACE
Karen (North Atlantic)	0.9 ACE
Sepat (Western North Pacific)	0.9 ACE
Nongfa (Western North Pacific)	0.8 ACE
Lingling (Western North Pacific)	0.7 ACE
Andrea (North Atlantic)	0.6 ACE
Senyar (North Indian)	0.6 ACE
Tam (South Pacific)	0.5 ACE
Pita (South Pacific)	0.5 ACE
Barry (North Atlantic)	0.4 ACE
Faida (South-West Indian)	0.0 ACE

ACE is the sum of the squares of six hourly wind speeds, in units of 10,000 knots squared, counted while winds are at or above 34 knots.

Landfalls

Landfalls of Dianne 2025
Date	Place	Position	Wind
2025-03-28	Open coast, place not named in the data	-16.3, 123.8	50 kt (93 km/h, 58 mph)

Which Agency's Numbers

Wind and pressure from bom,usa as carried in NOAA IBTrACS. Agencies average winds over different periods.

Related Headlines

Third party news, headline and link only

Download the Data

Sources: Source: International Best Track Archive for Climate Stewardship (IBTrACS) v04r01, NOAA National Centers for Environmental Information, doi:10.25921/82ty-9e16. Some agency values come from third parties such as JMA, IMD and BoM. (NOAA NCEI terms (citation requested)) Made with Natural Earth. Public domain map data. Borders are Natural Earth's de facto depiction. Data as of 2026-10-17. Storm records are best tracks and can be revised by the agencies.