Ernie: 2017 South-West Indian

Ernie reached 140 kt (259 km/h, 161 mph) (C5) in the 2017 South-West Indian season, from 2017-04-04 to 2017-04-11, with track, wind and pressure and 10.0 ACE.

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

Key Facts

Ernie was a category 5 at its peak in the 2017 South-West Indian season.
Peak maximum sustained wind was 140 kt (259 km/h, 161 mph), reached on 7 April 2017, and the lowest pressure was 918 hPa.
The track runs from 4 April 2017 to 11 April 2017 with 61 six hourly positions.
Ernie accumulated 10.0 ACE.
No landfall is recorded in the track.

Track

4 April 2017 to 11 April 2017

Ernie formed on 4 April 2017 and its track is coloured by category at each six hourly step, peaking as a category 5. Made with Natural Earth and IBTrACS.

Wind

Knots, six hourly

Maximum sustained wind in knots every six hours, from 20 kt (37 km/h, 23 mph) at the start to a peak of 140 kt (259 km/h, 161 mph).

Maximum sustained wind of Ernie
Time (UTC)	Wind (kt)
2017-04-04T06:00:00Z	20 kt
2017-04-04T09:00:00Z	n/a
2017-04-04T12:00:00Z	20 kt
2017-04-04T15:00:00Z	n/a
2017-04-04T18:00:00Z	20 kt
2017-04-04T21:00:00Z	n/a
2017-04-05T00:00:00Z	20 kt
2017-04-05T03:00:00Z	n/a
2017-04-05T06:00:00Z	20 kt
2017-04-05T09:00:00Z	23 kt
2017-04-05T12:00:00Z	25 kt
2017-04-05T15:00:00Z	25 kt
2017-04-05T18:00:00Z	30 kt
2017-04-05T21:00:00Z	30 kt
2017-04-06T00:00:00Z	35 kt
2017-04-06T03:00:00Z	38 kt
2017-04-06T06:00:00Z	40 kt
2017-04-06T09:00:00Z	43 kt
2017-04-06T12:00:00Z	45 kt
2017-04-06T15:00:00Z	50 kt
2017-04-06T18:00:00Z	55 kt
2017-04-06T21:00:00Z	68 kt
2017-04-07T00:00:00Z	70 kt
2017-04-07T03:00:00Z	98 kt
2017-04-07T06:00:00Z	95 kt
2017-04-07T09:00:00Z	128 kt
2017-04-07T12:00:00Z	120 kt
2017-04-07T15:00:00Z	140 kt
2017-04-07T18:00:00Z	115 kt
2017-04-07T21:00:00Z	130 kt
2017-04-08T00:00:00Z	105 kt
2017-04-08T03:00:00Z	110 kt
2017-04-08T06:00:00Z	95 kt
2017-04-08T09:00:00Z	95 kt
2017-04-08T12:00:00Z	85 kt
2017-04-08T15:00:00Z	90 kt
2017-04-08T18:00:00Z	80 kt
2017-04-08T21:00:00Z	90 kt
2017-04-09T00:00:00Z	70 kt
2017-04-09T03:00:00Z	88 kt
2017-04-09T06:00:00Z	65 kt
2017-04-09T09:00:00Z	78 kt
2017-04-09T12:00:00Z	60 kt
2017-04-09T15:00:00Z	63 kt
2017-04-09T18:00:00Z	50 kt
2017-04-09T21:00:00Z	50 kt
2017-04-10T00:00:00Z	40 kt
2017-04-10T03:00:00Z	43 kt
2017-04-10T06:00:00Z	30 kt
2017-04-10T09:00:00Z	38 kt
2017-04-10T12:00:00Z	25 kt
2017-04-10T15:00:00Z	33 kt
2017-04-10T18:00:00Z	25 kt
2017-04-10T21:00:00Z	30 kt
2017-04-11T00:00:00Z	25 kt
2017-04-11T03:00:00Z	30 kt
2017-04-11T06:00:00Z	25 kt
2017-04-11T09:00:00Z	28 kt
2017-04-11T12:00:00Z	25 kt
2017-04-11T15:00:00Z	23 kt
2017-04-11T18:00:00Z	25 kt

Pressure

hPa, six hourly

Central pressure in hectopascals every six hours, falling to 918 hPa at the lowest.

Central pressure of Ernie
Time (UTC)	Pressure (hPa)
2017-04-04T06:00:00Z	1008 hPa
2017-04-04T09:00:00Z	n/a
2017-04-04T12:00:00Z	1008 hPa
2017-04-04T15:00:00Z	n/a
2017-04-04T18:00:00Z	1008 hPa
2017-04-04T21:00:00Z	n/a
2017-04-05T00:00:00Z	1008 hPa
2017-04-05T03:00:00Z	n/a
2017-04-05T06:00:00Z	1006 hPa
2017-04-05T09:00:00Z	1006 hPa
2017-04-05T12:00:00Z	1003 hPa
2017-04-05T15:00:00Z	1004 hPa
2017-04-05T18:00:00Z	1001 hPa
2017-04-05T21:00:00Z	1000 hPa
2017-04-06T00:00:00Z	998 hPa
2017-04-06T03:00:00Z	995 hPa
2017-04-06T06:00:00Z	995 hPa
2017-04-06T09:00:00Z	991 hPa
2017-04-06T12:00:00Z	992 hPa
2017-04-06T15:00:00Z	986 hPa
2017-04-06T18:00:00Z	987 hPa
2017-04-06T21:00:00Z	973 hPa
2017-04-07T00:00:00Z	973 hPa
2017-04-07T03:00:00Z	950 hPa
2017-04-07T06:00:00Z	951 hPa
2017-04-07T09:00:00Z	928 hPa
2017-04-07T12:00:00Z	924 hPa
2017-04-07T15:00:00Z	918 hPa
2017-04-07T18:00:00Z	927 hPa
2017-04-07T21:00:00Z	926 hPa
2017-04-08T00:00:00Z	940 hPa
2017-04-08T03:00:00Z	941 hPa
2017-04-08T06:00:00Z	946 hPa
2017-04-08T09:00:00Z	952 hPa
2017-04-08T12:00:00Z	955 hPa
2017-04-08T15:00:00Z	963 hPa
2017-04-08T18:00:00Z	966 hPa
2017-04-08T21:00:00Z	963 hPa
2017-04-09T00:00:00Z	974 hPa
2017-04-09T03:00:00Z	958 hPa
2017-04-09T06:00:00Z	973 hPa
2017-04-09T09:00:00Z	965 hPa
2017-04-09T12:00:00Z	977 hPa
2017-04-09T15:00:00Z	982 hPa
2017-04-09T18:00:00Z	985 hPa
2017-04-09T21:00:00Z	998 hPa
2017-04-10T00:00:00Z	996 hPa
2017-04-10T03:00:00Z	997 hPa
2017-04-10T06:00:00Z	1000 hPa
2017-04-10T09:00:00Z	995 hPa
2017-04-10T12:00:00Z	1005 hPa
2017-04-10T15:00:00Z	1000 hPa
2017-04-10T18:00:00Z	1005 hPa
2017-04-10T21:00:00Z	1002 hPa
2017-04-11T00:00:00Z	1005 hPa
2017-04-11T03:00:00Z	1000 hPa
2017-04-11T06:00:00Z	1005 hPa
2017-04-11T09:00:00Z	1002 hPa
2017-04-11T12:00:00Z	1006 hPa
2017-04-11T15:00:00Z	1006 hPa
2017-04-11T18:00:00Z	1006 hPa

ACE Compared With the 2017 Season

Accumulated cyclone energy of named storms in 2017
Irma (North Atlantic)	64.9 ACE
Maria (North Atlantic)	44.8 ACE
Jose (North Atlantic)	43.3 ACE
Noru (Western North Pacific)	34.4 ACE
Fernanda (Eastern North Pacific)	28.4 ACE
Lee (North Atlantic)	17.9 ACE
Donna (South Pacific)	16.8 ACE
Talim (Western North Pacific)	16.4 ACE
Hilary (Eastern North Pacific)	14.6 ACE
Ophelia (North Atlantic)	14.5 ACE
Lan (Western North Pacific)	14.5 ACE
Harvey (North Atlantic)	11.4 ACE
Irwin (Eastern North Pacific)	11.1 ACE
Kenneth (Eastern North Pacific)	10.3 ACE
Ernie (this storm)	10.0 ACE
Enawo (South-West Indian)	9.8 ACE
Banyan (Western North Pacific)	9.5 ACE
Ockhi (North Indian)	9.3 ACE
Eugene (Eastern North Pacific)	8.1 ACE
Gert (North Atlantic)	7.8 ACE
Sanvu (Western North Pacific)	7.1 ACE
Debbie (South Pacific)	6.9 ACE
Nesat (Western North Pacific)	6.4 ACE
Carlos (South-West Indian)	6.4 ACE
Ella (South Pacific)	6.2 ACE
Katia (North Atlantic)	6.1 ACE
Tembin (Western North Pacific)	5.5 ACE
Cook (South Pacific)	5.4 ACE
Greg (Eastern North Pacific)	5.2 ACE
Dora (Eastern North Pacific)	5.0 ACE
Doksuri (Western North Pacific)	4.8 ACE
Saola (Western North Pacific)	4.7 ACE
Norma (Eastern North Pacific)	4.7 ACE
Otis (Eastern North Pacific)	4.6 ACE
Nate (North Atlantic)	4.1 ACE
Khanun (Western North Pacific)	4.0 ACE
Dineo (South-West Indian)	3.8 ACE
Franklin (North Atlantic)	3.7 ACE
Hato (Western North Pacific)	3.7 ACE
Damrey (Western North Pacific)	3.6 ACE
Bransby (South-West Indian)	3.5 ACE
Frances (South Pacific)	3.4 ACE
Nanmadol (Western North Pacific)	2.8 ACE
Kulap (Western North Pacific)	2.7 ACE
Lidia (Eastern North Pacific)	2.6 ACE
Caleb (South-West Indian)	2.5 ACE
Yvette (South-West Indian)	2.4 ACE
Mawar (Western North Pacific)	2.3 ACE
Nalgae (Western North Pacific)	2.3 ACE
Max (Eastern North Pacific)	2.2 ACE
Pakhar (Western North Pacific)	2.2 ACE
Kai-Tak (Western North Pacific)	2.1 ACE
Abela (South-West Indian)	2.1 ACE
Mora (North Indian)	1.9 ACE
Cindy (North Atlantic)	1.8 ACE
Talas (Western North Pacific)	1.7 ACE
Rina (North Atlantic)	1.7 ACE
Haitang (Western North Pacific)	1.5 ACE
Sonca (Western North Pacific)	1.5 ACE
Merbok (Western North Pacific)	1.5 ACE
Haikui (Western North Pacific)	1.2 ACE
Alfred (South Pacific)	1.2 ACE
Pilar (Eastern North Pacific)	1.1 ACE
Blanche (South Pacific)	1.0 ACE
Muifa (Western North Pacific)	0.9 ACE
Arlene (North Atlantic)	0.8 ACE
Don (North Atlantic)	0.8 ACE
Maarutha (North Indian)	0.8 ACE
Kirogi (Western North Pacific)	0.7 ACE
Greg (South-West Indian)	0.7 ACE
Bart (South Pacific)	0.7 ACE
Emily (North Atlantic)	0.6 ACE
Fernando (South-West Indian)	0.6 ACE
Selma (Eastern North Pacific)	0.6 ACE
Beatriz (Eastern North Pacific)	0.6 ACE
Adrian (Eastern North Pacific)	0.5 ACE
Bret (North Atlantic)	0.5 ACE
Guchol (Western North Pacific)	0.5 ACE
Jova (Eastern North Pacific)	0.5 ACE
Roke (Western North Pacific)	0.5 ACE
Ramon (Eastern North Pacific)	0.4 ACE
Calvin (Eastern North Pacific)	0.3 ACE
Philippe (North Atlantic)	0.1 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.

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.