1973–74 South-West Indian Ocean cyclone season

1973–74 South-West Indian Ocean cyclone season
Season summary map
Seasonal boundaries
First system formed14 September 1973
Last system dissipated23 April 1974
Strongest storm
NameDeidre-Delinda
 • Maximum winds150 km/h (90 mph)
(10-minute sustained)
 • Lowest pressure964 hPa (mbar)
Seasonal statistics
Total disturbances8
Total depressions7
Total storms7
Tropical cyclones2
Intense tropical cyclones1
Total fatalitiesUnknown
Total damageUnknown
Related articles
South-West Indian Ocean tropical cyclone seasons
1971–72, 1972–73, 1973–74, 1974–75, 1975–76

The 1973–74 South-West Indian Ocean cyclone season was a below-average cyclone season. The season officially ran from November 1, 1973, to April 30, 1974.

Systems

Moderate Tropical Storm Alice

Moderate tropical storm (MFR)
Tropical storm (SSHWS)
 
DurationSeptember 14 – September 24
Peak intensity75 km/h (45 mph) (10-min);
1000 hPa (mbar)

Alice was born around 80E, and reached its greatest intensity (Phase C plus) on September 20 to the north of Tromelin. but has resulted in some light to moderate rain over extreme northeastern Madagascar between 21 and 23, the winds not exceeding 55 km / h in the region of Diego-Suarez.[1]

Tropical Cyclone Bernadette

Tropical cyclone (MFR)
Tropical storm (SSHWS)
 
DurationOctober 16 – October 28
Peak intensity150 km/h (90 mph) (10-min);
985 hPa (mbar)

Bernadette, more active than before, has reached the stage of a tropical cyclone in the strict sense of the international classification, in the 26th October (minimum pressure estimated of 985 mb), moderate rainfall strong enough of have been recorded on the extreme north of Madagascar and off the cape of Amber, a boat noted a peak wind of 139 km/h.

Moderate Tropical Storm Christiane

Moderate tropical storm (MFR)
Tropical storm (SSHWS)
 
DurationDecember 13 – December 21
Peak intensity75 km/h (45 mph) (10-min);
995 hPa (mbar)

Moderate Tropical Storm Christian existed from December 13 to December 21.

Intense Tropical Cyclone Deidre–Delinda

Intense tropical cyclone (MFR)
Category 2 tropical cyclone (SSHWS)
 
DurationDecember 26 (Crossed 80°E) – January 4
Peak intensity205 km/h (125 mph) (10-min);
965 hPa (mbar)

Tropical Cyclone Deidre-Delinda existed from December 26, 1973, to January 4, 1974.

Moderate Tropical Storm Esmeralda

Moderate tropical storm (MFR)
Tropical storm (SSHWS)
 
DurationDecember 30 – January 5
Peak intensity85 km/h (50 mph) (10-min);
995 hPa (mbar)

Moderate Tropical Storm Esmeralda existed from December 30, 1973, to January 5, 1974. The storm looped to the southeast of Madagascar, bringing several days of rainfall to Réunion, reaching 222.2 mm (8.75 in).[2]

Tropical Disturbance Fredegonde

Tropical disturbance (MFR)
Tropical depression (SSHWS)
 
DurationJanuary 19 – January 23
Peak intensity45 km/h (30 mph) (10-min);
1005 hPa (mbar)

Tropical Disturbance Fredegonde existed from January 19 to January 23.

Tropical Cyclone Ghislaine

Tropical cyclone (MFR)
Tropical storm (SSHWS)
 
DurationFebruary 24 (Crossed 80°E) – March 3
Peak intensity150 km/h (90 mph) (10-min);
985 hPa (mbar)

Moderate Tropical Storm Ghislaine existed from February 24 to March 3.

Severe Tropical Storm Honorine

Severe tropical storm (MFR)
Tropical storm (SSHWS)
 
DurationApril 12 – April 23
Peak intensity95 km/h (60 mph) (10-min);
998 hPa (mbar)

Moderate Tropical Storm Honorine existed from April 12 to April 23.

Season effects

Name Dates Peak intensity Areas affected Damage
(USD) 		Deaths Refs
Category Wind speed Pressure
Alice September 14 – 24, 1973 Moderate tropical storm 75 km/h (45 mph) 1000 hPa (29.53 inHg) Madagascar None None [3]
Bernadette October 16 – 28, 1973 Tropical cyclone 150 km/h (90 mph) 985 hPa (29.09 inHg) None None None [3]
Christiane December 13 – 21, 1973 Moderate tropical storm 75 km/h (45 mph) 995 hPa (29.38 inHg) None None None [3]
Deidre–Delinda December 26, 1973 – January 4, 1974 Intense Tropical cyclone 205 km/h (125 mph) 965 hPa (28.50 inHg) None None None [3]
Esmeralda December 30, 1973 – January 5, 1974 Moderate tropical storm 85 km/h (50 mph) 995 hPa (29.38 inHg) None None None [3]
Fredegonde February 24 – March 3, 1974 Tropical disturbance 45 km/h (30 mph) 1005 hPa (29.68 inHg) None None None [3]
Ghislaine February 24 – March 3, 1974 Tropical cyclone 150 km/h (90 mph) 985 hPa (29.09 inHg) None None None [3]
Honorine April 12 – 23, 1974 Severe tropical storm 95 km/h (60 mph) 998 hPa (29.47 inHg) None None None [3]
Season aggregates
8 systems 20 January – 7 May 205 km/h (125 mph) 965 hPa (28.50 inHg)

See also

  • Atlantic hurricane seasons: 1973, 1974
  • Eastern Pacific hurricane seasons: 1973, 1974
  • Western Pacific typhoon seasons: 1973, 1974
  • North Indian Ocean cyclone seasons: 1973, 1974

References

  1. ^ "LA SAISON CYCLONIQUE 1973-1974" (PDF). Archived (PDF) from the original on 2013-10-31.
  2. ^ Tropical Storm Esmerelda, 31 December 1973-6 January 1974. National Climatic Data Center (Report). Global tropical/extratropical cyclone climatic atlas. 1996. Retrieved February 7, 2019.
  3. ^ a b c d e f g h "Saison 1973-1974 des perturbations tropicales dans l'océan indien du sud-ouest" [1973-1974 Tropical disturbance season in the southwestern Indian Ocean]. Météorologie Maritime (in French). No. 143. 1989. pp. 41–43. ISSN 0222-5123.