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.

This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, extratropical transitions, and dissipations during the season. The time stamp for each event is stated using Coordinated Universal Time (UTC), the 24-hour clock where 00:00 = midnight UTC. Additionally, figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (Kilometres or miles). Direct wind observations are rounded to the nearest whole number. Meteorological observations typically report atmospheric pressures are measured in hectopascals per the recommendation of the World Meteorological Organization, and the nearest hundredth of an inches of mercury or millibars (hectopascals).

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 , 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.

Timeline

March March 13 03:00 UTC at 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). March 15 00:00 UTC the IMD downgrades the depression to a well-marked low over Lakshadweep.

May May 16 00:00 UTC at the JTWC upgrades a disturbance to a tropical depression, assigning it the designation 01A. 12:00 UTC at the IMD upgrades 01A to a depression. 18:00 UTC at the JTWC upgrades 01A to a tropical storm. May 17 00:00 UTC at the IMD upgrades 01A to a deep depression. 03:00 UTC at the IMD upgrades 01A to a cyclonic storm, assigning it the name Sagar. May 18 03:00 UTC at 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 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). May 19 00:00 UTC at the JTWC downgrades Sagar to a tropical storm. between 08:00 and 09:00 UTC at Sagar makes landfall on Somalia. 18:00 UTC at the IMD downgrades Sagar to a deep depression. May 20 00:00 UTC at the IMD downgrades Sagar to a depression. 03:00 UTC the IMD downgrades Sagar to a well-marked low. 06:00 UTC at the JTWC downgrades Sagar to a tropical depression. May 21 06:00 UTC at the JTWC begins monitoring a tropical depression in the Arabian Sea, assigning it the designation 02A. 12:00 UTC at the IMD upgrades 02A to a depression. May 22 00:00 UTC at the JTWC upgrades 02A to a tropical storm. 03:00 UTC at the IMD upgrades 02A to a deep depression. 12:00 UTC at the IMD upgrades 02A to a cyclonic storm, assigning it the name Mekunu. May 23 03:00 UTC at the IMD upgrades Mekunu to a severe cyclonic storm. 09:00 UTC at the IMD upgrades Mekunu to a very severe cyclonic storm. 12:00 UTC at the JTWC upgrades Mekunu to a Category 1-equivalent cyclone on the Saffir–Simpson scale. May 25 00:00 UTC at the JTWC upgrades Mekunu to a Category 2-equivalent cyclone on the Saffir–Simpson scale. 03:00 UTC at the IMD upgrades Mekunu to an extremely severe cyclonic storm. 12:00 UTC at 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 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 Mekunu makes landfall on Oman. May 26 00:00 UTC at the IMD downgrades Mekunu to a very severe cyclonic storm. 00:00 UTC at the JTWC downgrades Mekunu to a Category 2-equivalent cyclone on the Saffir–Simpson scale. 03:00 UTC at the IMD downgrades Mekunu to a severe cyclonic storm. 06:00 UTC at the JTWC downgrades Mekunu to a Category 1-equivalent cyclone on the Saffir–Simpson scale. 09:00 UTC at the IMD downgrades Mekunu to a cyclonic storm. 12:00 UTC at the JTWC downgrades Mekunu to a tropical storm. 18:00 UTC at the IMD downgrades Mekunu to a deep depression. May 27 00:00 UTC at the IMD downgrades Mekunu to a depression. 03:00 UTC the IMD downgrades Mekunu to a well-marked low. 06:00 UTC at the JTWC downgrades Mekunu to a tropical depression. May 28 06:00 UTC at the JTWC upgrades a disturbance in the Bay of Bengal to a tropical depression, assigning it the designation 03B. 18:00 UTC at the JTWC downgrades 03B to a tropical wave. May 29 00:00 UTC at the JTWC upgrades 03B to a tropical storm. 06:00 UTC at the IMD upgrades 03B to a depression. 12:00 UTC at 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 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 the IMD upgrades 03B to a deep depression. May 30 00:00 UTC at the JTWC downgrades 03B to a tropical depression. 03:00 UTC at the IMD downgrades 03B to a depression. 06:00 UTC the IMD downgrades 03B to a well-marked low.

June June 10 06:00 UTC at the IMD upgrades a well-marked low in the Bay of Bengal to a depression. 12:00 UTC at 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 the depression makes landfall on Feni. June 11 00:00 UTC the IMD downgrades the depression to a well-marked low.

July July 21 03:00 UTC at the IMD upgrades a well-marked low in the Bay of Bengal to a depression. 09:00 UTC at 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 the IMD downgrades the system to a depression. July 23 00:00 UTC the IMD downgrades the system to a well-marked low.

August August 7 09:00 UTC at 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. August 8 03:00 UTC the IMD downgrades the depression to a well-marked low. August 15 03:00 UTC at 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). August 17 03:00 UTC the IMD downgrades the depression to a well-marked low.

September September 6 00:00 UTC at the IMD upgrades a well-marked low in the Bay of Bengal to a depression. 03:00 UTC at 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. September 7 00:00 UTC at the IMD downgrades the system to a depression. 06:00 UTC the IMD downgrades the system to a well-marked low. September 19 15:00 UTC at the IMD upgrades a well-marked low in the Bay of Bengal to a depression. 18:00 UTC at 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). September 20 03:00 UTC at the IMD upgrades 04B to a deep depression. 12:00 UTC at the JTWC upgrades 04B to a tropical storm. 15:00 UTC at 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 Daye makes landfall on Gopalpur. September 21 00:00 UTC at the IMD downgrades Daye to a deep depression. 06:00 UTC at the JTWC downgrades Daye to a tropical depression. 12:00 UTC at the IMD downgrades Daye to a depression. September 22 12:00 UTC the IMD downgrades Daye to a well-marked low.

October October 6 06:00 UTC at the JTWC upgrades a disturbance in the Arabian Sea to a tropical depression, assigning it the designation 04A. 09:00 UTC at the IMD upgrades 05A to a depression. October 7 09:00 UTC at the IMD upgrades 05A to a deep depression. 18:00 UTC at the JTWC upgrades 05A to a tropical storm. October 8 00:00 UTC at the IMD upgrades 05A to a cyclonic storm, assigning it the name Luban. 03:00 UTC at the IMD upgrades a well-marked low in the Bay of Bengal to a depression. 06:00 UTC at the JTWC upgrades the system to a tropical depression, assigning it the designation 06B. 18:00 UTC at the IMD upgrades 06B to a deep depression. October 9 00:00 UTC at the JTWC upgrades 06B to a tropical storm. 06:00 UTC at the IMD upgrades 06B to a cyclonic storm, assigning it the name Titli. 09:00 UTC at the IMD upgrades Luban to a severe cyclonic storm. 18:00 UTC at the JTWC upgrades Luban to a Category 1-equivalent cyclone on the Saffir–Simpson scale. 21:00 UTC at the IMD upgrades Titli to a severe cyclonic storm. October 10 00:00 UTC at the IMD upgrades Luban to a very severe cyclonic storm. 00:00 UTC at the JTWC upgrades Titli to a Category 1-equivalent cyclone on the Saffir–Simpson scale. 06:00 UTC at 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 the IMD upgrades Titli to a very severe cyclonic storm. 12:00 UTC at 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 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 the JTWC upgrades Titli to a Category 2-equivalent cyclone on the Saffir–Simpson scale. 18:00 UTC at 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 Titli makes landfall on Andhra Pradesh. October 11 00:00 UTC at the JTWC downgrades Luban to a Category 1-equivalent cyclone on the Saffir–Simpson scale. 06:00 UTC at the IMD downgrades Titli to a severe cyclonic storm. 06:00 UTC at the JTWC downgrades Titli to a Category 1-equivalent cyclone on the Saffir–Simpson scale. 12:00 UTC at the JTWC downgrades Luban to a tropical storm. 12:00 UTC at the IMD downgrades Titli to a cyclonic storm. 18:00 UTC at the IMD downgrades Titli to a deep depression. 18:00 UTC at the JTWC downgrades Titli to a tropical storm. October 12 03:00 UTC at the IMD downgrades Luban to a severe cyclonic storm.