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1965–66 South-West Indian Ocean cyclone season
Season summary map
Seasonal boundaries
First system formed	August 9, 1965
Last system dissipated	May 1, 1966
Strongest storm
Name	Ivy
• Maximum winds	220 km/h (140 mph) (1-minute sustained)
• Lowest pressure	925 hPa (mbar)
Seasonal statistics
Total depressions	12
Total storms	4
Tropical cyclones	3
Total fatalities	3
Total damage	Unknown
Related articles
1965–66 Australian region cyclone season 1965–66 South Pacific cyclone season
South-West Indian Ocean tropical cyclone seasons 1963–64, 1964–65, 1965–66, 1966–67, 1967–68

The 1965–66 South-West Indian Ocean cyclone season was a near average season, despite beginning unusually early on August 9 with the formation of an early-season tropical depression, Anne.

Seasonal summary

Systems

Tropical Disturbance Anne

Tropical disturbance (MFR)
Duration	August 15 – August 15
Peak intensity	35 km/h (25 mph) (10-min);

Anne existed on August 15.

Tropical Disturbance Brenda

Tropical disturbance (MFR)
Tropical depression (SSHWS)
Duration	August 16 – August 18
Peak intensity	45 km/h (30 mph) (10-min);

Brenda existed from August 16 to August 18.

Severe Tropical Storm Claude

Severe tropical storm (MFR)
Tropical storm (SSHWS)
Duration	December 24 – January 3
Peak intensity	95 km/h (60 mph) (10-min);

Claude existed from December 24 to January 10.

Tropical Cyclone Denise

Tropical cyclone (MFR)
Category 2 tropical cyclone (SSHWS)
Duration	January 2 – January 10
Peak intensity	150 km/h (90 mph) (10-min);

On January 7, Cyclone Denise passed north of Mauritius, producing wind gusts of 170 km/h (110 mph). Later, the storm crossed over Réunion, dropping record rainfall. Over a 24-hour period, Denise dropped 1,825 mm (71.9 in) of rainfall at Foc Foc, Réunion, of which 1,144 mm (45.0 in) fell over 12 hours; both precipitation totals are the highest recorded worldwide for their respective durations. Over 48 hours, precipitation totaled 2,230 mm (88 in) at Bras Sec. The heavy rains caused flooding that killed three people, and caused severe road and crop damage.

Tropical Depression Evelyn

Tropical depression (MFR)
Tropical depression (SSHWS)
Duration	January 19 – January 20
Peak intensity	55 km/h (35 mph) (10-min);

Evelyn existed from January 19 to January 20.

Tropical Depression Francine

Tropical depression (MFR)
Tropical depression (SSHWS)
Duration	January 30 – February 1
Peak intensity	55 km/h (35 mph) (10-min);

Francine existed from January 30 to February 1.

Tropical Depression Germaine

Tropical depression (MFR)
Tropical storm (SSHWS)
Duration	February 14 – February 17
Peak intensity	55 km/h (35 mph) (10-min);

Germaine existed from February 14 to February 17.

Tropical Depression Hilary

Tropical depression (MFR)
Tropical storm (SSHWS)
Duration	February 20 – February 23
Peak intensity	55 km/h (35 mph) (10-min);

Hilary existed from February 20 to February 23.

Intense Tropical Cyclone Ivy

Intense tropical cyclone (MFR)
Category 4 tropical cyclone (SSHWS)
Duration	March 3 – March 12
Peak intensity	195 km/h (120 mph) (10-min);

Ivy existed from March 3 to March 12.

Tropical Depression Martha–Judith

Tropical depression (MFR)
Tropical storm (SSHWS)
Duration	March 3 (entered basin) – March 8
Peak intensity	55 km/h (35 mph) (10-min);

Judith was the tenth cyclone of the season and was formed in the Australian basin on February 23.

Tropical Cyclone Nancy–Kay

Tropical cyclone (MFR)
Category 1 tropical cyclone (SSHWS)
Duration	March 17 – March 29
Peak intensity	150 km/h (90 mph) (10-min);

Tropical Depression Lily

Tropical depression (MFR)
Tropical depression (SSHWS)
Duration	April 22 – May 1
Peak intensity	55 km/h (35 mph) (10-min);

Lily existed from April 22 to May 1.

See also

• Atlantic hurricane seasons: 1965, 1966
• Eastern Pacific hurricane seasons: 1965, 1966
• Western Pacific typhoon seasons: 1965, 1966
• North Indian Ocean cyclone seasons: 1965, 1966

References

1. Chris Landsea. "Subject: E4) What are the largest rainfalls associated with tropical cyclones?". Frequently Asked Questions. Hurricane Research Division. Retrieved February 16, 2019.
2. "1966 Denise" (in French). Meteo France. Retrieved February 16, 2019.
3. Tropical Storm Denise, 2–11 March. National Climatic Data Center (Report). Global tropical/extratropical cyclone climatic atlas. 1996. Retrieved February 16, 2019.

• South-West Indian Ocean cyclone seasons