- May 13
-
- 0000 UTC – The Joint Typhoon Warning Center (JTWC) designates an area of low pressure as Tropical Depression 01B.[1]
- May 14
-
- 1800 UTC – Tropical Depression 01B strengthens into a tropical storm.[1]
- May 15
-
- 0600 UTC – The India Meteorological Department (IMD) designates Tropical Storm 01B as Depression BOB 01.[2]
- 1200 UTC – Depression BOB 01 strengthens into a deep depression.[2]
- May 16
-
- 0300 UTC – Deep Depression BOB 01 strengthens into a cyclonic storm.[2]
- May 17
-
- 0000 UTC – Tropical Storm 01B (BOB 01) strengthens into a category 1 tropical cyclone.[1]
- 0900 UTC – Cyclonic Storm BOB 01 (01B) strengthens into a severe cyclonic storm.[2]
- May 18
-
- 0000 UTC – Tropical Cyclone 01B (BOB 01) strengthens into a category 2 tropical cyclone.[1]
- 1200 UTC – Tropical Cyclone 01B (BOB 01) strengthens into a category 3 tropical cyclone.[1]
- May 19
-
- 0300 UTC – Severe Cyclonic Storm BOB 01 (01B) reaches its peak intensity of 105 mph (165 km/h).[2]
- 0600 UTC – Tropical Cyclone 01B (BOB 01) strengthens into a category 4 tropical cyclone.[1]
- 1430 UTC – Severe Cyclonic Storm BOB 01 (01B) makes landfall near Sitakundu, Bangladesh with winds of 105 mph (165 kmh).[2]
- 1800 UTC – The IMD declares Severe Cyclonic Storm BOB 01 (01B) dissipated.[2]
- 1800 UTC – Tropical Cyclone 01B weakens into a category 2 tropical cyclone.[1]
- May 20
-
- 0000 UTC – Tropical Cyclone 01B weakens into a category 1 tropical cyclone.[1]
- 0600 UTC – Tropical Cyclone 01B weakens into a tropical storm and dissipates.[1]
- June 26
-
- 0300 UTC – Depression BOB 02 forms.[2]
- 1200 UTC – Depression BOB 02 strengthens into a deep depression and reaches its peak intensity of 35 mph (55 km/h).[2]
- June 27
-
- June 29
-
- 1800 UTC – Deep Depression BOB 02 weakens into a depression.[2]
- June 30
-
- 0000 UTC – Depression BOB 02 dissipates.[2]
- July 29
-
- 0300 UTC – Depression BOB 03 forms.[2]
- July 30
-
- 0300 UTC – Depression BOB 03 strengthens into a deep depression and reaches its peak intensity of 35 mph (55 km/h).[2]
- 1000 UTC – Deep Depression BOB 03 makes landfall near Chandbali, Orissa, India with winds of 35 mph (55 km/h).[2]
- August 2
-
- 0600 UTC – Deep Depression BOB 03 weakens into a depression.[2]
- 0900 UTC – Depression BOB 03 dissipates.[2]
- August 4
-
- 0600 UTC – Depression BOB 04 forms.[2]
- August 5
-
- 0300 UTC – Depression BOB 04 strengthens into a deep depression and reaches its peak intensity of 35 mph (55 km/h).[2]
- 0600 UTC – Deep Depression BOB 04 makes landfall near Sagar Island, West Bengal, India with winds of 35 mph (55 km/h).[2]
- August 7
-
- 0600 UTC – Deep Depression BOB 04 weakens into a depression.[2]
- August 8
-
- 0000 UTC – Depression BOB 04 dissipates.[2]
- August 20
-
- 0300 UTC – Depression BOB 05 forms.[2]
- 0600 UTC – Depression BOB 05 strengthens into a deep depression and reaches its peak intensity of 35 mph (55 km/h).[2]
- 0800 UTC – Deep Depression BOB 05 makes landfall near Chandbali, Orissa, India with winds of 35 mph (55 km/h).[2]
- August 26
-
- 1800 UTC – Deep Depression BOB 05 weakens into a depression.[2]
- August 27
-
- 1200 UTC – Depression BOB 05 dissipates.[2]
- August 28
-
- 0300 UTC – Depression BOB 06 forms at peak intensity of 30 mph (50 km/h).[2]
- 0600 UTC – Depression BOB 06 makes landfall in Orissa, India with winds of 30 mph (50 km/h).[2]
- August 30
-
- 1200 UTC – Depression BOB 06 dissipates.[2]