1999 South Indian cyclone season
Cyclone Evrina:Frederic 1999
Cyclone Evrina:Frederic crossed a wide stretch of the southern Indian Ocean in 1999. It strengthened west of Australia, reached Category 5 intensity near 90°E and then weakened during a prolonged westward passage.
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161 mph
Mar 31, 1999 during the tropical stage
Full archive record, including non-tropical stages if present
Along the recorded center positions
STORM HISTORY
Moving away from Australia
The archive begins near 12°S, 119°E on March 25. The developing cyclone moved west-southwest, away from the Australian mainland. It reached hurricane-force winds near 105°E and continued strengthening as it crossed toward 100°E.
A peak near the center of the ocean
Maximum one-minute winds reached 140 kt on March 31, equivalent to Category 5 on the Saffir–Simpson scale. The minimum recorded central pressure was 920 hPa. During this phase, the cyclone followed a westward course near 17°S, with its strongest winds far offshore.
The system weakened as it crossed 90°E and continued toward 70°E. Late in its life, the track turned south and then east near 62°E, ending over the Indian Ocean on April 10. No archived center position lies over land during the crossing.
Further reading
QUICK ANSWERS
Evrina:Frederic in brief
What was Cyclone Evrina:Frederic's highest wind speed?
161 mph, the highest one-minute sustained wind in its tropical stage, recorded on Mar 31, 1999, 12:00 PM UTC.
What category was Cyclone Evrina:Frederic?
Category 5 at its peak on the Saffir–Simpson one-minute wind scale, first reaching Category 5 on Mar 31, 1999, 12:00 PM UTC. Other agencies classify storms differently.
What was Cyclone Evrina:Frederic's lowest pressure?
920 mb, the minimum central pressure recorded during its tropical stage, on Mar 31, 1999, 04:00 AM UTC.
When did Cyclone Evrina:Frederic occur?
The archived track runs from Mar 25, 1999, 12:00 AM UTC to Apr 10, 1999, 06:00 PM UTC, with the tropical stage from Mar 25, 1999, 01:00 PM UTC to Apr 9, 1999, 09:00 AM UTC.
Where did Cyclone Evrina:Frederic form?
In the South Indian basin, in the 1999 season. Its first archived position is 11.9°S, 119.3°E on Mar 25, 1999, 12:00 AM UTC.
Did Cyclone Evrina:Frederic make landfall?
No archived position places Cyclone Evrina:Frederic's center over land, but positions are six-hourly and a brief landfall can fall between them.
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 and Field documentation
Sources & methodology