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SOUTH INDIAN · 2017 SEASON

Cyclone Ernie (2017)

Recorded track and intensity · 4 Apr 2017–11 Apr 2017

PEAK INTENSITYCategory 5
THE COMPLETE TRACKOpen in the explorer
ERNIE: complete recorded track, 4 Apr 2017–11 Apr 2017Recorded track from 4 Apr 2017 to 11 Apr 2017. Colors show the recorded wind category. The highlighted position follows the replay controls.5 Apr, 00:00 UTC6 Apr, 00:00 UTC7 Apr, 00:00 UTC8 Apr, 00:00 UTC9 Apr, 00:00 UTC10 Apr, 00:00 UTC11 Apr, 00:00 UTCPeak · Category 54 APR11 APR

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DepressionTropical stormCat 1Cat 2Cat 3Cat 4Cat 5Post-tropical
All times UTC

Wind speed & pressure

7 Apr, 12:00 UTC
Wind speed 140 ktPressure 918 hPa
0900809601601020kthPa4 Apr6 Apr9 Apr11 Apr

Forward speed & ACE

7 Apr, 12:00 UTC
Forward speed 3 ktCumulative ACE 4.71 10⁴ kt²
00107.52015kt10⁴ kt²4 Apr6 Apr9 Apr11 Apr

Hover or tap either graph to follow the track. The slider controls both graphs. Each line uses its matching colored axis.

Forward speed measures the center’s motion. ACE accumulates squared one-minute winds at 00, 06, 12 and 18 UTC during tropical or subtropical stages at 34 kt or above. Missing observations make ACE partial. Missing measurements remain gaps.

Maximum sustained wind140 kt

161 mph / 259 km/h

Minimum recorded pressure918 hPa

7 Apr 2017 · tropical stage

Recorded track duration7.5 days

Full archive record, including non-tropical stages if present

Approximate track distance2,430 km

Along the recorded center positions

STORM HISTORY

Track and intensity summary

Ernie is listed in the South Indian basin for the 2017 season. Its archived track begins on 4 Apr 2017, 06:00 UTC at 9.9°S, 115°E. US-agency wind is not available for this first observation. These dates describe the available observations, which may include stages before and after the tropical cyclone phase.

The first Category 5 observation appears on 7 Apr 2017, 12:00 UTC. The highest recorded tropical-stage one-minute sustained wind is 140 knots (161 mph / 259 km/h), first recorded on 7 Apr 2017, 12:00 UTC at 15.7°S, 110.5°E. The minimum recorded tropical-stage central pressure is 918 hPa on 7 Apr 2017, 12:00 UTC.

The full record spans 180 hours and approximately 2,430 kilometers along the recorded center positions. The last recorded position is 21.7°S, 98.2°E on 11 Apr 2017, 18:00 UTC. The final tropical-stage observation is earlier, on 11 Apr 2017, 15:00 UTC.

This summary is calculated from the NOAA IBTrACS archive. Category 5 describes the storm’s peak recorded wind intensity, not its intensity at landfall or the severity of impacts at any location. Landfall times, damage and casualties have not been independently reviewed for this page.

METHODOLOGY

Data sources and limitations

The map and summary are generated from NOAA’s IBTrACS v04r01 archive. Wind and category use US-agency records; minimum pressure is calculated during the tropical stage, with the archive’s pressure source retained. Category 5 refers to the Saffir–Simpson one-minute wind scale; local agencies may use different classifications. Coastlines use Natural Earth’s 1:10m land data.

Track distance adds great-circle distances between consecutive observations, excluding gaps over 12 hours. This track has no gaps over 12 hours. The line shows the storm’s center, not its size, rainfall or flood extent. Converted wind speeds are rounded to the nearest whole unit.

Archive retrieved

NOAA IBTrACS archive · Field documentation

Sources & methodology

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