Timeline of the 2018 North Indian Ocean cyclone season

The 2018 North Indian Ocean cyclone season was an above-average period of tropical cyclone formation in the Northern Indian Ocean. The season featured 14 depressions, 10 deep depressions, 7 cyclonic storms, 5 severe cyclonic storms, 4 very severe cyclonic storms, and 1 extremely severe cyclonic storm. The season has no official boundaries, though storms typically form between April and December, with peaks in tropical cyclone activity from May–June and in November.

The India Meteorological Department (IMD) is the official Regional Specialized Meteorological Centre for the Northern Indian Ocean basin, and as such, it is responsible for tracking and issuing advisories on systems in the Arabian Sea and in the Bay of Bengal. If tropical cyclones in the Northern Indian Ocean reach winds of 34 kn, it is given a name from a pre-defined naming list. The Joint Typhoon Warning Center (JTWC) unofficially issues advisories on systems in the Northern Indian Ocean, assigning tropical cyclones a numerical identifier and suffixing it with the letter A for systems in the Arabian Sra and B for systems in the Bay of Bengal. The IMD measures tropical cyclone wind speeds over a 3-minute average while the JTWC uses a 1-minute average.

March
March 13 March 15
 * 03:00 UTC at 5°N, 76°W – the IMD upgrades a well-marked low-pressure area in the Arabian Sea to a depression, estimating maximum 3-minute sustained winds of 45 km/h (30 mph) and a minimum central pressure of 1006 hPa (mbar; 29.71 inHg).
 * 00:00 UTC – the IMD downgrades the depression to a well-marked low over Lakshadweep.

May
May 16 May 17 May 18 May 19 May 20 May 21 May 22 May 23 May 25 May 26 May 27 May 28 May 29 May 30
 * 00:00 UTC at 12°N, 52.7°W – the JTWC upgrades a disturbance to a tropical depression, assigning it the designation 01A.
 * 12:00 UTC at 13°N, 50°W – the IMD upgrades 01A to a depression.
 * 18:00 UTC at 13.2°N, 49.7°W – the JTWC upgrades 01A to a tropical storm.
 * 00:00 UTC at 13.2°N, 49°W – the IMD upgrades 01A to a deep depression.
 * 03:00 UTC at 13.2°N, 48.7°W – the IMD upgrades 01A to a cyclonic storm, assigning it the name Sagar.
 * 03:00 UTC at 12.2°N, 46.3°W – the IMD estimates Sagar to have peaked in intensity with maximum 3-minute sustained winds of 85 km/h (50 mph) and a minimum central pressure of 994 hPa (mbar; 29.35 inHg).
 * 18:00 UTC at 11.2°N, 45.1°W – the JTWC upgrades Sagar to a Category 1-equivalent cyclone on the Saffir–Simpson scale, estimating maximum 1-minute sustained winds of 120 km/h (75 mph).
 * 00:00 UTC at 10.9°N, 44.7°W – the JTWC downgrades Sagar to a tropical storm.
 * between 08:00 and 09:00 UTC at 10.65°N, 44°W – Sagar makes landfall on Somalia.
 * 18:00 UTC at 10.2°N, 43.3°W – the IMD downgrades Sagar to a deep depression.
 * 00:00 UTC at 10°N, 42.9°W – the IMD downgrades Sagar to a depression.
 * 03:00 UTC – the IMD downgrades Sagar to a well-marked low.
 * 06:00 UTC at 9.8°N, 41.8°W – the JTWC downgrades Sagar to a tropical depression.
 * 06:00 UTC at 7.9°N, 58.6°W – the JTWC begins monitoring a tropical depression in the Arabian Sea, assigning it the designation 02A.
 * 12:00 UTC at 8.5°N, 58.5°W – the IMD upgrades 02A to a depression.
 * 00:00 UTC at 9.1°N, 57.5°W – the JTWC upgrades 02A to a tropical storm.
 * 03:00 UTC at 9.2°N, 57.2°W – the IMD upgrades 02A to a deep depression.
 * 12:00 UTC at 9.2°N, 57.2°W – the IMD upgrades 02A to a cyclonic storm, assigning it the name Mekunu.
 * 03:00 UTC at 11.2°N, 55.9°W – the IMD upgrades Mekunu to a severe cyclonic storm.
 * 09:00 UTC at 11.8°N, 55.9°W – the IMD upgrades Mekunu to a very severe cyclonic storm.
 * 12:00 UTC at 11.9°N, 56.1°W – the JTWC upgrades Mekunu to a Category 1-equivalent cyclone on the Saffir–Simpson scale.
 * 00:00 UTC at 15.2°N, 54.7°W – the JTWC upgrades Mekunu to a Category 2-equivalent cyclone on the Saffir–Simpson scale.
 * 03:00 UTC at 15.4°N, 54.5°W – the IMD upgrades Mekunu to an extremely severe cyclonic storm.
 * 12:00 UTC at 16.4°N, 54.1°W – the IMD estimates Mekunu to have peaked in intensity with maximum 3-minute sustained winds of 175 km/h (110 mph) and a minimum central pressure of 960 hPa (mbar; 28.35 inHg).
 * 12:00 UTC at 16.3°N, 54.4°W – the JTWC upgrades Mekunu to a Category 3-equivalent cyclone on the Saffir–Simpson scale, estimating maximum 1-minute sustained winds of 185 km/h (115 mph).
 * between 18:30 and 19:30 UTC at 16.85°N, 53.75°W – Mekunu makes landfall on Oman.
 * 00:00 UTC at 17.2°N, 53.5°W – the IMD downgrades Mekunu to a very severe cyclonic storm.
 * 00:00 UTC at 17.2°N, 53.5°W – the JTWC downgrades Mekunu to a Category 2-equivalent cyclone on the Saffir–Simpson scale.
 * 03:00 UTC at 17.4°N, 53.4°W – the IMD downgrades Mekunu to a severe cyclonic storm.
 * 06:00 UTC at 17.9°N, 53.3°W – the JTWC downgrades Mekunu to a Category 1-equivalent cyclone on the Saffir–Simpson scale.
 * 09:00 UTC at 18.1°N, 53.1°W – the IMD downgrades Mekunu to a cyclonic storm.
 * 12:00 UTC at 18.6°N, 53.1°W – the JTWC downgrades Mekunu to a tropical storm.
 * 18:00 UTC at 18.6°N, 52.8°W – the IMD downgrades Mekunu to a deep depression.
 * 00:00 UTC at 19°N, 52.6°W – the IMD downgrades Mekunu to a depression.
 * 03:00 UTC – the IMD downgrades Mekunu to a well-marked low.
 * 06:00 UTC at 19°N, 52°W – the JTWC downgrades Mekunu to a tropical depression.
 * 06:00 UTC at 16.5°N, 90.2°W – the JTWC upgrades a disturbance in the Bay of Bengal to a tropical depression, assigning it the designation 03B.
 * 18:00 UTC at 17.8°N, 91.5°W – the JTWC downgrades 03B to a tropical wave.
 * 00:00 UTC at 18.3°N, 92°W – the JTWC upgrades 03B to a tropical storm.
 * 06:00 UTC at 18.5°N, 92.2°W – the IMD upgrades 03B to a depression.
 * 12:00 UTC at 19.2°N, 93°W – the IMD estimates 03B to have peaked in intensity with maximum 3-minute sustained winds of 55 km/h (35 mph) and a minimum central pressure of 992 hPa (mbar; 29.29 inHg).
 * 12:00 UTC at 19.5°N, 93.5°W – the JTWC estimates 03B to have peaked in intensity with maximum 1-minute sustained winds of 85 km/h (50 mph).
 * between 17:00 and 18:00 UTC – 03B makes landfall north of Kyaukphyu.
 * 18:00 UTC at 19.8°N, 93.7°W – the IMD upgrades 03B to a deep depression.
 * 00:00 UTC at 21.3°N, 95.7°W – the JTWC downgrades 03B to a tropical depression.
 * 03:00 UTC at 21.8°N, 95.8°W – the IMD downgrades 03B to a depression.
 * 06:00 UTC – the IMD downgrades 03B to a well-marked low.

June
June 10 June 11
 * 06:00 UTC at 22.3°N, 91.5°W – the IMD upgrades a well-marked low in the Bay of Bengal to a depression.
 * 12:00 UTC at 22.7°N, 91.4°W – the IMD estimates the depression to have peaked in intensity with maximum 3-minute sustained winds of 45 km/h (30 mph) and a minimum central pressure of 988 hPa (mbar; 29.18 inHg).
 * 15:00 UTC at 23.1°N, 91.2°W – the depression makes landfall on Feni.
 * 00:00 UTC – the IMD downgrades the depression to a well-marked low.

July
July 21 July 23
 * 03:00 UTC at 21°N, 88°W – the IMD upgrades a well-marked low in the Bay of Bengal to a depression.
 * 09:00 UTC at 21.5°N, 87.6°W – the IMD upgrades the system to a deep depression, estimating maximum 3-minute sustained winds of 55 km/h (35 mph) and a minimum central pressure of 988 hPa (mbar; 29.18 inHg).
 * between 11:00 and 12:00 UTC – the system makes landfall south of Digha.
 * 18:00 UTC at 22°N, 87°W – the IMD downgrades the system to a depression.
 * 00:00 UTC – the IMD downgrades the system to a well-marked low.

August
August 7 August 8 August 15 August 17
 * 09:00 UTC at 21.5°N, 87.5°W – the IMD upgrades a well-marked low in the Bay of Bengal to a depression, estimating maximum 3-minute sustained winds of 45 km/h (30 mph) and a minimum central pressure of 992 Hpa (mbar; 29.29 inHg).
 * between 14:30 and 16:30 UTC – the depression makes landfall close to Balasore.
 * 03:00 UTC – the IMD downgrades the depression to a well-marked low.
 * 03:00 UTC at 20°N, 86°W – the IMD upgrades a well-marked low in the Bay of Bengal to a depression, estimating maximum sustained 3-minute winds of 45 km/h (30 mph) and a minimum central pressure of 993 Hpa (mbar; 29.32 inHg).
 * 03:00 UTC – the IMD downgrades the depression to a well-marked low.

September
September 6 September 7 September 19 September 20 September 21 September 22
 * 00:00 UTC at 21.8°N, 88°W – the IMD upgrades a well-marked low in the Bay of Bengal to a depression.
 * 03:00 UTC at 21.8°N, 87.9°W – the IMD upgrades the system to a deep depression, estimating maximum 3-minute sustained winds of 55 km/h (35 mph).
 * between 04:30 and 05:30 UTC – the system makes landfall close to Digha.
 * 00:00 UTC at 22.2°N, 84°W – the IMD downgrades the system to a depression.
 * 06:00 UTC – the IMD downgrades the system to a well-marked low.
 * 15:00 UTC at 17.2°N, 89°W – the IMD upgrades a well-marked low in the Bay of Bengal to a depression.
 * 18:00 UTC at 16.9°N, 87.4°W – the JTWC upgrades the system to a tropical depression, assigning it the designation 04B and estimating maximum 1-minute sustained winds of 65 km/h (40 mph).
 * 03:00 UTC at 17.5°N, 87°W – the IMD upgrades 04B to a deep depression.
 * 12:00 UTC at 18.2°N, 86.4°W – the JTWC upgrades 04B to a tropical storm.
 * 15:00 UTC at 18.7°N, 85.6°W – the IMD upgrades 04B to a cyclonic storm, assigning it the name Daye and estimating maximum 3-minute sustained winds of 65 km/h (40 mph) and a minimum central pressure of 992 Hpa (mbar; 29.29 inHg).
 * between 19:00 and 20:00 UTC at 19.27°N, 84.92°W – Daye makes landfall on Gopalpur.
 * 00:00 UTC at 20°N, 83.7°W – the IMD downgrades Daye to a deep depression.
 * 06:00 UTC at 19.8°N, 81.7°W – the JTWC downgrades Daye to a tropical depression.
 * 12:00 UTC at 21.4°N, 80.2°W – the IMD downgrades Daye to a depression.
 * 12:00 UTC – the IMD downgrades Daye to a well-marked low.

October
October 6 October 7 October 8 October 9 October 10 October 11 October 12 October 13 October 14 October 15
 * 06:00 UTC at 11°N, 67.1°W – the JTWC upgrades a disturbance in the Arabian Sea to a tropical depression, assigning it the designation 04A.
 * 09:00 UTC at 11.2°N, 67°W – the IMD upgrades 05A to a depression.
 * 09:00 UTC at 12°N, 64.8°W – the IMD upgrades 05A to a deep depression.
 * 18:00 UTC at 11.8°N, 63.4°W – the JTWC upgrades 05A to a tropical storm.
 * 00:00 UTC at 12.3°N, 62.4°W – the IMD upgrades 05A to a cyclonic storm, assigning it the name Luban.
 * 03:00 UTC at 14°N, 88.8°W – the IMD upgrades a well-marked low in the Bay of Bengal to a depression.
 * 06:00 UTC at 14.2°N, 88°W – the JTWC upgrades the system to a tropical depression, assigning it the designation 06B.
 * 18:00 UTC at 14.5°N, 87.6°W – the IMD upgrades 06B to a deep depression.
 * 00:00 UTC at 14.6°N, 87.1°W – the JTWC upgrades 06B to a tropical storm.
 * 06:00 UTC at 14.8°N, 86.7°W – the IMD upgrades 06B to a cyclonic storm, assigning it the name Titli.
 * 09:00 UTC at 13.2°N, 60°W – the IMD upgrades Luban to a severe cyclonic storm.
 * 18:00 UTC at 13.7°N, 59.8°W – the JTWC upgrades Luban to a Category 1-equivalent cyclone on the Saffir–Simpson scale.
 * 21:00 UTC at 15.7°N, 85.8°W – the IMD upgrades Titli to a severe cyclonic storm.
 * 00:00 UTC at 14.1°N, 59°W – the IMD upgrades Luban to a very severe cyclonic storm.
 * 00:00 UTC at 16.1°N, 86.2°W – the JTWC upgrades Titli to a Category 1-equivalent cyclone on the Saffir–Simpson scale.
 * 06:00 UTC at 14.2°N, 58.9°W – the IMD estimates Luban to have peaked in intensity with maximum 3-minute sustained winds of 140 km/h (85 mph) and a minimum central pressure of 978 hPa (mbar; 28.88 inHg).
 * 06:00 UTC at 17°N, 85.6°W – the IMD upgrades Titli to a very severe cyclonic storm.
 * 12:00 UTC at 14.4°N, 58.6°W – the JTWC upgrades Luban to a Category 2-equivalent cyclone on the Saffir–Simpson scale, estimating maximum 1-minute sustained winds of 155 km/h (100 mph).
 * 12:00 UTC at 17.5°N, 85.3°W – the IMD estimates Titli to have peaked in intensity with maximum 3-minute sustained winds of 150 km/h (90 mph) and a minimum central pressure of 970 hPa (mbar; 28.64 inHg).
 * 12:00 UTC at 17.6°N, 85.3°W – the JTWC upgrades Titli to a Category 2-equivalent cyclone on the Saffir–Simpson scale.
 * 18:00 UTC at 18.3°N, 84.8°W – the JTWC upgrades Titli to a Category 3-equivalent cyclone on the Saffir–Simpson scale, estimating maximum 1-minute sustained winds of 195 km/h (120 mph).
 * between 23:00 UTC and 00:00 UTC October 11 at 18.8°N, 84.5°W – Titli makes landfall on Andhra Pradesh.
 * 00:00 UTC at 14.4°N, 58.2°W – the JTWC downgrades Luban to a Category 1-equivalent cyclone on the Saffir–Simpson scale.
 * 06:00 UTC at 19.3°N, 83.8°W – the IMD downgrades Titli to a severe cyclonic storm.
 * 06:00 UTC at 19°N, 83.9°W – the JTWC downgrades Titli to a Category 1-equivalent cyclone on the Saffir–Simpson scale.
 * 12:00 UTC at 14.5°N, 57.9°W – the JTWC downgrades Luban to a tropical storm.
 * 12:00 UTC at 19.9°N, 83.7°W – the IMD downgrades Titli to a cyclonic storm.
 * 18:00 UTC at 20.3°N, 84.3°W – the IMD downgrades Titli to a deep depression.
 * 18:00 UTC at 19.9°N, 84.1°W – the JTWC downgrades Titli to a tropical storm.
 * 03:00 UTC at 14.7°N, 57.4°W – the IMD downgrades Luban to a severe cyclonic storm.
 * 06:00 UTC at 21.3°N, 85.5°W – the JTWC downgrades Titli to a tropical depression.
 * 09:00 UTC at 20.9°N, 85.5°W – the IMD downgrades Titli to a depression.
 * 18:00 UTC at 14.8°N, 56.6°W – the IMD downgrades Luban to a cyclonic storm.
 * 00:00 UTC at 20.9°N, 85.5°W – the IMD downgrades Titli to a well-marked low.
 * between 05:30 and 06:00 UTC at 15.8°N, 52.2°W – Luban makes landfall on Oman.
 * 09:00 UTC at 15.9°N, 51.7°W – the IMD downgrades Luban to a deep depression.
 * 12:00 UTC at 16.2°N, 51.6°W – the JTWC downgrades Luban to a tropical depression.
 * 18:00 UTC at 16.2°N, 50.7°W – the IMD downgrades Luban to a depression.
 * 03:00 UTC – the IMD downgrades Luban to a well-marked low.

November
November 10 November 11 November 12 November 13 November 15 November 16 November 17 November 18 November 19
 * 03:00 UTC at 11.7°N, 92.5°W – the IMD upgrades a well-marked low in the Bay of Bengal to a depression.
 * 12:00 UTC at 12.6°N, 90.8°W – the IMD upgrades the system to a deep depression.
 * 18:00 UTC at 13.2°N, 89.7°W – the JTWC upgrades the system to a tropical storm, assigning it the designation 07B.
 * 00:00 UTC at 13.4°N, 89.3°W – the IMD upgrades 07B to a cyclonic storm, assigning it the name Gaja.
 * 12:00 UTC at 12.9°N, 87.8°W – the JTWC downgrades Gaja to a tropical depression.
 * 18:00 UTC at 13.4°N, 85.8°W – the JTWC upgrades Gaja to a tropical storm.
 * 03:00 UTC at 11.3°N, 82.6°W – the IMD upgrades Gaja to a severe cyclonic storm.
 * 06:00 UTC at 11.3°N, 82.3°W – the JTWC upgrades Gaja to a Category 1-equivalent cyclone on the Saffir–Simpson scale.
 * 15:00 UTC at 10.6°N, 80.7°W – the IMD upgrades Gaja to a very severe cyclonic storm.
 * 18:00 UTC at 10.5°N, 80.3°W – the IMD estimates Gaja to have peaked in intensity with maximum 3-minute sustained winds of 130 km/h (80 mph) and a minimum central pressure of 976 hPa (mbar; 28.82 inHg).
 * 18:00 UTC at 10.6°N, 80.2°W – the JTWC estimates Gaja to have peaked in intensity with maximum 1-minute sustained winds of 150 km/h (90 mph).
 * between 19:00 and 21:00 UTC at 10.45°N, 79.8°W – Gaja makes landfall between Nagapattinam and Vedaranyam.
 * 00:00 UTC at 10.4°N, 79.2°W – the IMD downgrades Gaja to a severe cyclonic storm.
 * 03:00 UTC at 10.4°N, 78.5°W – the IMD downgrades Gaja to a cyclonic storm.
 * 06:00 UTC at 10.5°N, 77.6°W – the IMD downgrades Gaja to a deep depression.
 * 06:00 UTC at 10.4°N, 77.7°W – the JTWC downgrades Gaja to a tropical storm.
 * 12:00 UTC at 10.1°N, 76.4°W – the IMD downgrades Gaja to a depression.
 * 00:00 UTC at 9.8°N, 74.3°W – the IMD upgrades Gaja to a deep depression.
 * 00:00 UTC at 10.5°N, 70°W – the JTWC downgrades Gaja to a tropical depression.
 * 12:00 UTC at 10.5°N, 68.4°W – the JTWC downgrades Gaja to a disturbance.
 * 06:00 UTC at 11.2°N, 65.8°W – the IMD downgrades Gaja to a depression.
 * 18:00 UTC – the IMD downgrades Gaja to a well-marked low.

December
December 13 December 15 December 16 December 17 December 18
 * 00:00 UTC at 6.5°N, 88.7°W – the IMD upgrades a well-marked low in the Bay of Bengal to a depression.
 * 12:00 UTC at 6.9°N, 88.9°W – the JTWC upgrades the system to a tropical depression, assigning it the designation 07B.
 * 18:00 UTC at 7.6°N, 88°W – the IMD upgrades 07B to a deep depression.
 * 06:00 UTC at 9.7°N, 85.4°W – the JTWC upgrades 07B to a tropical storm.
 * 12:00 UTC at 10.3°N, 84.9°W – the IMD upgrades 07B to a cyclonic storm, assigning it the name Phethai.
 * 09:00 UTC at 12.6°N, 83.6°W – the IMD upgrades Phethai to a severe cyclonic storm.
 * 12:00 UTC at 13.3°N, 83°W – the IMD estimates Phethai to have peaked in intensity with maximum 3-minute sustained winds of 100 km/h (65 mph) and a minimum central pressure of 992 hPa (mbar; 29.29 inHg).
 * 12:00 UTC at 13.4°N, 83.1°W – the JTWC estimates Phethai to have peaked in intensity with maximum 1-minute sustained winds of 100 km/h (65 mph).
 * 03:00 UTC at 15.8°N, 82.2°W – the IMD downgrades Phethai to a cyclonic storm.
 * between 08:00 and 09:00 UTC at 16.55°N, 82.25°W – Phethai makes landfall south of Yanam.
 * 12:00 UTC at 16.9°N, 82.4°W – the IMD downgrades Phethai to a deep depression.
 * 12:00 UTC at 16.8°N, 82.5°W – the JTWC downgrades Phethai to a tropical depression.
 * between 14:00 and 15:00 UTC – Phethai makes landfall near Tuni.
 * 18:00 UTC at 17.5°N, 82.5°W – the IMD downgrades Phethai to a depression.
 * 00:00 UTC – the IMD downgrades Phethai to a well-marked low.