1965–66 South-West Indian Ocean cyclone season

Tropical depression (MFR)
Tropical storm (SSHWS)
Duration	August 16 – August 18
Peak intensity	55 km/h (35 mph) (10-min) 997 hPa (mbar)

Tropical disturbance (MFR)
Tropical depression (SSHWS)
Duration	August 9 – August 15
Peak intensity	45 km/h (30 mph) (10-min) 1000 hPa (mbar)

1965–66 South-West Indian Ocean cyclone season
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	17
Total storms	12
Tropical cyclones	6
Total fatalities	3
Total damage	Unknown

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 Depression Anne

Anne existed from August 9 to August 15.

Tropical Depression Brenda

Brenda existed from August 16 to August 18.

Tropical Cyclone Alice

Category 3 severe tropical cyclone (Australian scale)
Category 1 tropical cyclone (SSHWS)

Duration	November 30 – December 5
Peak intensity	130 km/h (80 mph) (10-min) 964 hPa (mbar)

Alice existed from November 30 to December 5.

Severe Tropical Storm Claude

Severe tropical storm (MFR)
Tropical storm (SSHWS)

Duration	December 24 – January 10
Peak intensity	95 km/h (60 mph) (10-min) 984 hPa (mbar)

Claude existed from December 24 to January 10.

Tropical Cyclone Carol–Daisy

Category 3 severe tropical cyclone (Australian scale)
Category 1 tropical cyclone (SSHWS)

Duration	December 25 – January 2
Peak intensity	120 km/h (75 mph) (10-min) 968 hPa (mbar)

Carol-Daisy formed on December 25, entered the basin on January 1 and dissipated the next day.

Tropical Cyclone Denise

Tropical cyclone (MFR)
Category 2 tropical cyclone (SSHWS)

Duration	January 2 – January 11
Peak intensity	150 km/h (90 mph) (10-min) 949 hPa (mbar)

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.[1][2][3]

Tropical Cyclone 13S

Category 2 tropical cyclone (Australian scale)
Tropical storm (SSHWS)

Duration	January 11 – January 14
Peak intensity	95 km/h (60 mph) (10-min) 984 hPa (mbar)

13S existed briefly from January 11 to January 14.

Tropical Disturbance 17S

Tropical disturbance (MFR)
Tropical depression (SSHWS)

Duration	January 16 – January 19
Peak intensity	45 km/h (30 mph) (10-min) 1000 hPa (mbar)

17S existed from January 16 to January 19.

Tropical Depression Evelyn

Tropical depression (MFR)
Tropical storm (SSHWS)

Duration	January 19 – January 20
Peak intensity	55 km/h (35 mph) (10-min) 997 hPa (mbar)

Evelyn existed from January 19 to January 20.

Tropical Depression Francine

Tropical depression (MFR)
Tropical storm (SSHWS)

Duration	January 30 – February 1
Peak intensity	55 km/h (35 mph) (10-min) 997 hPa (mbar)

Francine existed from January 30 to February 1.

Moderate Tropical Storm Germaine

Moderate tropical storm (MFR)
Tropical storm (SSHWS)

Duration	February 14 – February 17
Peak intensity	65 km/h (40 mph) (10-min) 994 hPa (mbar)

Germaine existed from February 14 to February 17.

Moderate Tropical Storm Hilary

Moderate tropical storm (MFR)
Tropical storm (SSHWS)

Duration	February 20 – February 23
Peak intensity	65 km/h (40 mph) (10-min) 944 hPa (mbar)

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) 925 hPa (mbar)

Ivy existed from March 3 to March 12.

Moderate Tropical Storm Martha–Judith

Moderate tropical storm (MFR)
Tropical storm (SSHWS)

Duration	March 3 (entered basin) – March 8
Peak intensity	75 km/h (45 mph) (10-min) 991 hPa (mbar)

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 2 tropical cyclone (SSHWS)

Duration	March 17 – March 29
Peak intensity	150 km/h (90 mph) (10-min) 954 hPa (mbar)

Tropical Cyclone Nellie

Tropical cyclone (MFR)
Category 2 tropical cyclone (SSHWS)

Duration	March 23 (entered basin) – March 24 (exited basin)
Peak intensity	140 km/h (85 mph) (10-min) 958 hPa (mbar)

Nellie was formed in the Australian basin and existed from March 21 to 23.

Moderate Tropical Storm Lily

Moderate tropical storm (MFR)
Tropical storm (SSHWS)

Duration	April 22 – May 1
Peak intensity	65 km/h (40 mph) (10-min) 944 hPa (mbar)

Lily existed from April 22 to May 1.

References

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

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[faq4-1] 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.