1973 North Indian Ocean cyclone season

1973 North Indian Ocean cyclone season
Season summary map
Seasonal boundaries
First system formedMay 28, 1973
Last system dissipatedDecember 9, 1973
Seasonal statistics
Depressions20
Deep depressions2
Cyclonic storms6
Severe cyclonic storms4
Total fatalitiesUnknown
Total damageUnknown
Related articles

The 1973 North Indian Ocean cyclone season was part of the annual cycle of tropical cyclone formation. The season has no official bounds but cyclones tend to form between April and December. These dates conventionally delimit the period of each year when most tropical cyclones form in the northern Indian Ocean. There are two main seas in the North Indian Ocean—the Bay of Bengal to the east of the Indian subcontinent and the Arabian Sea to the west of India. The official Regional Specialized Meteorological Centre in this basin is the India Meteorological Department (IMD), while the Joint Typhoon Warning Center (JTWC) releases unofficial advisories. An average of five tropical cyclones form in the North Indian Ocean every season with peaks in May and November.[1] Cyclones occurring between the meridians 45°E and 100°E are included in the season by the IMD.[2]

Systems

Tropical Depression One (01A)

Deep depression (IMD)
Tropical depression (SSHWS)
 
DurationMay 27 – May 29
Peak intensity55 km/h (35 mph) (3-min);

This system formed in the Arabian Sea on May 27 and struck the Arabian peninsula on May 28, becoming the tenth system to affect the region since 1891.[3]

Tropical Storm Two (02A)

Deep depression (IMD)
Tropical storm (SSHWS)
 
DurationJune 6 – June 12
Peak intensity55 km/h (35 mph) (3-min);

Tropical Storm Six (06B)

Deep depression (IMD)
Tropical storm (SSHWS)
 
DurationJune 19 – June 22
Peak intensity55 km/h (35 mph) (3-min);

Tropical Storm Ten (10B)

Cyclonic storm (IMD)
Tropical storm (SSHWS)
 
DurationOctober 6 – October 12
Peak intensity85 km/h (50 mph) (3-min);

Tropical Storm Twelve (12B)

Severe cyclonic storm (IMD)
Tropical storm (SSHWS)
 
DurationNovember 3 – November 9
Peak intensity100 km/h (65 mph) (3-min);

This system formed on 3 November and intensified up to Severe Cyclonic Storm and to a high-end tropical storm by 8 November. On 9 November, the storm made landfall at Paradip in Odisha and dissipated rapidly within six hours after the landfall as the storm interacted with a trough. Paradip and Chandbali reported gust winds up to 110 kmph. This cyclone caused considerable agricultural damages to crops there but deaths are unknown.

Tropical Storm Thirteen (13B)

Severe cyclonic storm (IMD)
Tropical storm (SSHWS)
 
DurationNovember 14 – November 18
Peak intensity95 km/h (60 mph) (3-min);

Tropical Storm Fourteen (14B)

Severe cyclonic storm (IMD)
Tropical storm (SSHWS)
 
DurationDecember 5 – December 9
Peak intensity110 km/h (70 mph) (3-min);

This system formed as a tropical depression in the southern Bay on December 5, strengthening into a tropical storm as it turned north-northwest on December 5, then to near-hurricane strength on December 6. The cyclone recurved, striking Indian near Calcutta on December 9, though its main impacts were across Bangladesh.[4]

See also

References

  1. ^ "Frequently Asked Questions: What is the annual frequency of Cyclones over the Indian Seas? What is its intra-annual variation?". India Meteorological Department. 2012. Archived from the original on May 21, 2015. Retrieved June 8, 2012.
  2. ^ "Bulletins Issued by Regional Specialized Meteorological Centre (RSMC) – Tropical Cyclones, New Delhi" (PDF). India Meteorological Department. May 25, 2009. Archived from the original (PDF) on 2012-04-12. Retrieved July 16, 2012.
  3. ^ "North Indian Ocean". Hurricane Alley. Mariners Weather Log. 17 (6). National Oceanic and Atmospheric Administration: 366. November 1973.
  4. ^ Richard M. DeAngelis (March 1974). "Hurricane Alley". Mariners Weather Log. 18 (2): 93.
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