| Basin: | NIO |
| Year: | 1973 |
| Track: | 1973 North Indian Ocean cyclone season summary.jpg |
| First Storm Formed: | Unknown |
| Last Storm Dissipated: | Unknown |
| Total Disturbances: | 20 |
| Total Storms: | 6 |
| Total Hurricanes: | 4 |
| Five Seasons: | 1971, 1972, 1973, 1974, 1975 |
| Atlantic Season: | 1973 Atlantic hurricane season |
| East Pacific Season: | 1973 Pacific hurricane season |
| West Pacific Season: | 1973 Pacific typhoon season |
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]
| Basin: | NIO |
| Track: | 01A 1973 track.png |
| Formed: | May 27 |
| Dissipated: | May 29 |
| 1-Min Winds: | 25 |
| 3-Min Winds: | 30 |
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]
| Basin: | NIO |
| Track: | 02A 1973 track.png |
| Formed: | June 6 |
| Dissipated: | June 12 |
| 1-Min Winds: | 35 |
| 3-Min Winds: | 30 |
| Central Pressure: | 991 |
| Basin: | NIO |
| Track: | 06B 1973 track.png |
| Formed: | June 19 |
| Dissipated: | June 22 |
| 1-Min Winds: | 35 |
| 3-Min Winds: | 30 |
| Basin: | NIO |
| Track: | 10B 1973 track.png |
| Formed: | October 6 |
| Dissipated: | October 12 |
| 1-Min Winds: | 40 |
| 3-Min Winds: | 45 |
| Central Pressure: | 996 |
| Basin: | NIO |
| Track: | 12B 1973 track.png |
| Formed: | November 3 |
| Dissipated: | November 9 |
| 1-Min Winds: | 60 |
| 3-Min Winds: | 55 |
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.
| Basin: | NIO |
| Track: | 13B 1973 track.png |
| Formed: | November 14 |
| Dissipated: | November 18 |
| 1-Min Winds: | 55 |
| 3-Min Winds: | 50 |
| Central Pressure: | 994 |
| Basin: | NIO |
| Track: | 14B 1973 track.png |
| Formed: | December 5 |
| Dissipated: | December 9 |
| 1-Min Winds: | 60 |
| 3-Min Winds: | 60 |
| Central Pressure: | 990 |
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]