1974–75 South Pacific cyclone season

1974–75 South Pacific cyclone season
Season summary map
Seasonal boundaries
First system formedNovember 20, 1974
Last system dissipatedApril 6, 1975
Strongest storm
NameVal and Alison
 • Maximum winds155 km/h (100 mph)
(10-minute sustained)
 • Lowest pressure945 hPa (mbar)
Seasonal statistics
Total disturbances6
Tropical cyclones5
Severe tropical cyclones3
Total fatalitiesUnknown
Total damageUnknown
Related articles
South Pacific tropical cyclone seasons
1972–73, 1973–74, 1974–75, 1975–76, 1976–77

The 1974–75 South Pacific cyclone season ran year-round from July 1 to June 30. Tropical cyclone activity in the Southern Hemisphere reaches its peak from mid-February to early March.

Systems

Cyclone 04P

Tropical storm (SSHWS)
 
DurationDecember 6 – December 9
Peak intensity65 km/h (40 mph) (1-min);

This cyclone existed from December 6 to December 9.

Cyclone 05P

Tropical storm (SSHWS)
 
DurationDecember 11 – December 15
Peak intensity85 km/h (50 mph) (1-min);

This cyclone existed from December 11 to December 15.

Cyclone 06P

Tropical storm (SSHWS)
 
DurationDecember 18 – December 24
Peak intensity95 km/h (60 mph) (1-min);

This cyclone existed from December 18 to December 24.

Tropical Cyclone Flora

Category 2 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
 
DurationJanuary 12 – January 22
Peak intensity100 km/h (65 mph) (10-min);
980 hPa (mbar)

Tropical Cyclone Flora existed from January 12 to January 22.

Tropical Cyclone Gloria

Category 2 tropical cyclone (Australian scale)
Tropical storm (SSHWS)
 
DurationJanuary 19 – January 23
Peak intensity100 km/h (65 mph) (10-min);
976 hPa (mbar)

Tropical Cyclone Gloria existed from January 14 to January 23.

Cyclone 15P

Tropical storm (SSHWS)
 
DurationJanuary 19 – January 21
Peak intensity65 km/h (40 mph) (1-min);

This cyclone existed from January 19 to January 21.

Severe Tropical Cyclone Val

Category 3 severe tropical cyclone (Australian scale)
Category 4 tropical cyclone (SSHWS)
 
DurationJanuary 24 – February 5
Peak intensity155 km/h (100 mph) (10-min);
945 hPa (mbar)

This cyclone existed from January 24 to February 5.

Cyclone 18P

Tropical storm (SSHWS)
 
DurationJanuary 26 – January 28
Peak intensity65 km/h (40 mph) (1-min);

This cyclone existed from January 26 to January 28.

Severe Tropical Cyclone Alison

Category 3 severe tropical cyclone (Australian scale)
Category 4 tropical cyclone (SSHWS)
 
DurationMarch 4 – March 13
Peak intensity155 km/h (100 mph) (10-min);
945 hPa (mbar)

This cyclone existed from March 4 to March 13.

Severe Tropical Cyclone Betty

Category 3 severe tropical cyclone (Australian scale)
Category 2 tropical cyclone (SSHWS)
 
DurationMarch 30 – April 12
Peak intensity130 km/h (80 mph) (10-min);
965 hPa (mbar)

This cyclone existed from March 30 to April 12.

Other systems

The first tropical disturbance of the season was first noted on November 19, while it was located within the Australian region about 500 km (310 mi) to the north of Brisbane, Australia.[1][2] Over the next couple of days, the system moved north-westwards into the South Pacific basin towards New Caledonia, before it recurved south-eastwards and was last noted as it moved back into the Australian region during November 24.[1][3] A windspeed of 75 km/h (45 mph) was recorded in northern New Zealand and associated with this system.[1]

Seasonal effects

1974–75 South Pacific cyclone season
Name Dates active Peak intensity Areas affected Damage
(US$) 		Deaths Refs
Category Wind speed Pressure
Unnamed November 20 – 24 Category 1 tropical cyclone 85 km/h (50 mph) 994 hPa (29.35 inHg) New Caledonia Unknown Unknown [1]
Flora January 12 – 22 Category 2 tropical cyclone 100 km/h (65 mph) 980 hPa (28.94 inHg) Unknown Unknown
Gloria January 19 – 23 Category 2 tropical cyclone 100 km/h (65 mph) 980 hPa (28.94 inHg) Unknown Unknown
Val January 24 – February 5 Category 3 severe tropical cyclone 155 km/h (100 mph) 965 hPa (28.50 inHg) Unknown Unknown
Alison March 4 – 13 Category 3 severe tropical cyclone 130 km/h (80 mph) 965 hPa (28.50 inHg) Unknown Unknown
Betty March 30 – April 12 Category 3 severe tropical cyclone 155 km/h (100 mph) 965 hPa (28.50 inHg) Unknown Unknown [4]
Season aggregates
6 systems November 20, 1974 – April 12, 1975 155 km/h (100 mph) 965 hPa (28.50 inHg)

See also

References

  1. ^ a b c d "Saison des perturbations tropicales: 1974-1975 dans le pacifique sud-oues". Météorologie Maritime (in French). No. 137. 1976. pp. 43–46. ISSN 2107-0830.
  2. ^ "1974 Not Named (1974324S24156)". International Best Track Archive for Climate Stewardship. Retrieved November 5, 2019.
  3. ^ "1974 Tropical Cyclone (Gale) Not Named (1974325S24166)". International Best Track Archive for Climate Stewardship. Retrieved November 5, 2019.
  4. ^ "1975 Tropical Cyclone Betty (1975089S17163)". International Best Track Archive for Climate Stewardship. Retrieved April 5, 2022.