1980 North Indian Ocean cyclone season

	Cyclonic storm (IMD)
Duration	October 16 – October 19
Peak intensity	75 km/h (45 mph) (3-min) 996 hPa (mbar)

	Cyclonic storm (IMD)
	Tropical storm (SSHWS)
Duration	October 10 – October 20
Peak intensity	65 km/h (40 mph) (3-min)

1980 North Indian Ocean cyclone season
	Season summary map
Seasonal boundaries
First system formed	October 20, 1980
Last system dissipated	December 17, 1980
Seasonal statistics
Depressions	14
Cyclonic storms	2 (3 unofficial)
Total fatalities	Unknown
Total damage	Unknown
Related articles
	1980 Atlantic hurricane season; 1980 Pacific hurricane season; 1980 Pacific typhoon season;

The 1980 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

There were 14 depressions during the season. The first depression lasted from May 15–19, moving from the central Bay of Bengal eastward to the Nicobar Islands. The second depression existed from June 4–6 off the west coast of India. On June 21, a land depression developed over central India, moving offshore into the Arabian Sea and dissipating on June 26. There were three land depressions in August, as well as one in September. Another depression developed in the northern Bay of Bengal on September 16 and moved northwestward through India, dissipating on September 26. Another depression developed in the Bay of Bengal on October 1, striking Bangladesh three days later. On October 14, a depression developed in the central Arabian Sea and moved westward, passing near Socotra on October 17; it moved into the Gulf of Aden a day later.[3]

Tropical Storm One (1B)

The first storm of the season began its life on October 10 in the Bay of Bengal. It executed an anticyclonic loop to the west, and became a tropical storm before hitting eastern Sri Lanka on the 17th. It continued westward, and ultimately dissipated over the Arabian Sea on the 20th.

Unknown Two (2B)

On October 18, a storm of unknown intensity hit eastern India, dissipating the next day.

Tropical Storm Three (3A)

Depression (IMD)
Tropical storm (SSHWS)

Duration	November 12 – November 19
Peak intensity	45 km/h (30 mph) (3-min)

The monsoon trough spawned a tropical depression off the western Indian coast on November 12. It tracked generally northwestward, slowly organizing into a tropical storm on the 17th. The storm turned to the northeast, where it dissipated over the northeastern Arabian Sea.

Tropical Storm Four (4B)

Cyclonic storm (IMD)
Tropical storm (SSHWS)

Duration	December 3 – December 7
Peak intensity	75 km/h (45 mph) (3-min) 998 hPa (mbar)

A storm of unknown intensity persisted in the western Bay of Bengal from December 3 to the 7th, remaining well offshore of any landmass.

Tropical Storm Five (5B)

Cyclonic storm (IMD)
Tropical storm (SSHWS)

Duration	December 12 – December 17
Peak intensity	75 km/h (45 mph) (3-min) 998 hPa (mbar)

The last storm of the season formed in the central Bay of Bengal on December 12. It moved east-southeastward, then turned to the west where it briefly became a tropical storm. The storm struck eastern Sri Lanka, and dissipated over the island on the 17th.

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References

"Frequently Asked Questions: What is the annual frequency of Cyclones over the Indian Seas? What is its intra-annual variation?". Indian Meteorological Department. 2012. Archived from the original on May 21, 2015. Retrieved June 8, 2012.
"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.
"Cyclone Web Atlas". Cyclone Warning & Research Centre, Regional Meteorological Centre. Chennai, India: India Meteorological Department. 2012. Retrieved June 7, 2012.

External links

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[1] "Frequently Asked Questions: What is the annual frequency of Cyclones over the Indian Seas? What is its intra-annual variation?". Indian 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.

[IMDAtlas-3] "Cyclone Web Atlas". Cyclone Warning & Research Centre, Regional Meteorological Centre. Chennai, India: India Meteorological Department. 2012. Retrieved June 7, 2012.