User:Iune/2010

The 2010 North Indian Ocean cyclone season was a below-average tropical cyclone season^{[nb 1]} which featured the highest number of deaths since the 2010 season. Despite a lack of activity during the monsoon season from June to September due to a strong southwest monsoon, the season was the first to have five systems of at least cyclonic storm intensity form since the 1998 season.^[1] The first storm of the season, Laila, formed on 17 May, while the final storm of the season, Deep Depression BOB 06, ultimately dissipated on 8 December.

Within the northern Indian Ocean, tropical cyclones were monitored by the India Meteorological Department (IMD) at the Regional Specialized Meteorological Center in New Delhi. The IMD designated tropical cyclones forming in the Arabian Sea with the prefix "ARB", tropical cyclones forming in the Bay of Bengal with the prefix "BOB" and tropical cyclones forming overland with the prefix "LAND". In addition, the United States Joint Typhoon Warning Center (JTWC) issued unofficial warnings within the region, with tropical cyclones forming in the Arabian Sea assigned the suffix "A" and tropical cyclones forming in the Bay of Bengal assigned the "B" suffix. The IMD used the IMD Tropical Cyclone Intensity Scale and measured average sustained wind speeds taken over a three-minute period, while the JTWC measured average sustained wind speeds taken over a one-minute period and used the Saffir–Simpson hurricane scale.

This timeline includes information from post-storm reviews by the IMD and the JTWC. It documents tropical cyclone formations, strengthenings, weakenings, landfalls, extratropical transitions, and dissipations during the season. Reports among warning centers often differ; therefore, information from both agencies has been included.

Timeline of events

May

17 May

06:00 UTC^{[nb 2]} (11:30 a.m. IST^{[nb 3]}) at 10°54′N 88°48′E / 10.9°N 88.8°E / 10.9; 88.8 – The India Meteorological Department (IMD) reports that Depression BOB 01 has formed while located roughly 475 km (295 mi)^{[nb 4]} northwest of Port Blair, Andaman and Nicobar Islands.^[2]
06:00 UTC (11:30 a.m. IST) at 10°54′N 88°48′E / 10.9°N 88.8°E / 10.9; 88.8 – The Joint Typhoon Warning Center (JTWC) designates Depression BOB 01 as Tropical Depression 01B while the system is located roughly 440 km (275 mi) northwest of Port Blair, Andaman and Nicobar Islands.^[3]
12:00 UTC (5:30 p.m. IST) at 11°00′N 88°00′E / 11.0°N 88.0°E / 11.0; 88.0 – The IMD reports that Depression BOB 01 (01B) has intensified into a deep depression while located roughly 870 km (540 mi) northeast of Chennai, Tamil Nadu.^[2]
18:00 UTC (11:30 p.m. IST) at 11°42′N 86°54′E / 11.7°N 86.9°E / 11.7; 86.9 – The JTWC reports that Tropical Depression BOB 01 (01B) has intensified into a tropical storm while located roughly 735 km (455 mi) southeast of Chennai, Tamil Nadu.^[3]

18 May

00:00 UTC (5:30 a.m. IST) at 11°30′N 86°30′E / 11.5°N 86.5°E / 11.5; 86.5 – The IMD reports that Deep Depression BOB 01 has intensified into a cyclonic storm and names it "Laila" while the system is located roughly 475 km (295 mi) northeast of Chennai, Tamil Nadu.^[2]

19 May

00:00 UTC (5:30 a.m. IST) at 13°24′N 81°54′E / 13.4°N 81.9°E / 13.4; 81.9 – The JTWC reports that Tropical Storm Laila (01B) has intensified into a category 1 tropical cyclone while located roughly 180 km (110 mi) northeast of Chennai, Tamil Nadu. Simultaneously, they report that the storm has reached its peak intensity, with maximum 1-minute sustained wind speeds of 120 km/h (75 mph)^[3]
06:00 UTC (11:30 a.m. IST) at 13°30′N 81°30′E / 13.5°N 81.5°E / 13.5; 81.5 – The IMD reports that Cyclonic Storm Laila (01B) has intensified into a severe cyclonic storm while located roughly 140 km (85 mi) northeast of Chennai, Tamil Nadu. Simultaneously, they report that the storm has reached its peak intensity, with maximum 3-minute sustained wind speeds of 105 km/h (65 mph).^[2]
12:00 UTC (5:30 p.m. IST) at 14°00′N 81°24′E / 14.0°N 81.4°E / 14.0; 81.4 – The JTWC reports that Tropical Cyclone Laila (01B) has weakened into a tropical storm while located roughly 160 km (100 mi) southeast of Nellore, Andhra Pradesh.^[3]

20 May

11:00–12:00 UTC (4:30–5:30 p.m. IST) at 16°00′N 80°30′E / 16.0°N 80.5°E / 16.0; 80.5 (Depression BOB 01 makes landfall) – The IMD reports that Severe Cyclonic Storm Laila (01B) has made landfall on the Andhra Pradesh coast near Bapatla with maximum 3-minute sustained wind speeds of 105 km/h (65 mph).^[2]
12:00 UTC (5:30 p.m. IST) at 16°00′N 80°30′E / 16.0°N 80.5°E / 16.0; 80.5 – The IMD reports that Severe Cyclonic Storm Laila (01B) has weakened into a cyclonic storm while located roughly 35 km (20 mi) south of Guntur, Andhra Pradesh.^[2]

21 May

03:00 UTC (8:30 a.m. IST) at 16°30′N 81°00′E / 16.5°N 81.0°E / 16.5; 81.0 – The IMD reports that Cyclonic Storm Laila (01B) has weakened into a deep depression while located roughly 100 km (60 mi) southwest of Rajahmundry, Andhra Pradesh.^[2]
06:00 UTC (11:30 a.m. IST) at 17°00′N 81°30′E / 17.0°N 81.5°E / 17.0; 81.5 – The IMD reports that Deep Depression ex-Laila (01B) has weakened into a depression while located roughly 30 km (20 mi) west of Rajahmundry, Andhra Pradesh.^[2]
12:00 UTC (5:30 p.m. IST) at 17°00′N 81°30′E / 17.0°N 81.5°E / 17.0; 81.5 – The IMD reports that Depression ex-Laila (01B) has weakened into an area of low pressure while located roughly 30 km (20 mi) west of Rajahmundry, Andhra Pradesh.^[2]
12:00 UTC (5:30 p.m. IST) at 16°54′N 81°30′E / 16.9°N 81.5°E / 16.9; 81.5 – The JTWC reports that Tropical Storm Laila (01B) has weakened into a tropical depression while located roughly 35 km (20 mi) southwest of Rajahmundry, Andhra Pradesh.^[3]
18:00 UTC (11:30 p.m. IST) at 17°06′N 81°54′E / 17.1°N 81.9°E / 17.1; 81.9 – The JTWC reports that Tropical Depression Laila (01B) has dissipated while located roughly 15 km (10 mi) northeast of Rajahmundry, Andhra Pradesh.^[3]

June

October

November

December

Footnotes

^ According to the India Meteorological Department, an average of thirteen tropical cyclones of at least depression intensity form in the North Indian Ocean annually; the 2010 season featured only eight such storms.^[1]
^ UTC stands for Coordinated Universal Time.
^ IST stands for Indian Standard Time, which is equivalent to UTC+5:30.
^ The figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (knots, miles, or kilometers), following the convention used in the India Meteorological Department and Joint Typhoon Warning Center's operational products for each storm. All other units are rounded to the nearest digit.

References

^ ^a ^b World Meteorological Organization (25 February 2011). WMO/ESCAP Panel On Tropical Cyclones Annual Review 2010 (PDF) (Report). India Meteorological Department. p. 95. Retrieved 8 February 2018.
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ "Best Track Data for Tropical Cyclones (1990-2016)". India Meteorological Department. Retrieved 8 February 2017.
^ ^a ^b ^c ^d ^e ^f "Best Track Data for Tropical Cyclone Laila (01B)". International Best Track Archive for Climate Stewardship (IBTrACS). National Oceanic and Atmospheric Administration. Retrieved 8 February 2018.

[2] According to the India Meteorological Department, an average of thirteen tropical cyclones of at least depression intensity form in the North Indian Ocean annually; the 2010 season featured only eight such storms.^[1]

[3] UTC stands for Coordinated Universal Time.

[4] IST stands for Indian Standard Time, which is equivalent to UTC+5:30.

[5] The figures for maximum sustained winds and position estimates are rounded to the nearest 5 units (knots, miles, or kilometers), following the convention used in the India Meteorological Department and Joint Typhoon Warning Center's operational products for each storm. All other units are rounded to the nearest digit.

[imd-report-1] World Meteorological Organization (25 February 2011). WMO/ESCAP Panel On Tropical Cyclones Annual Review 2010 (PDF) (Report). India Meteorological Department. p. 95. Retrieved 8 February 2018.

[imd-bt-6] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ "Best Track Data for Tropical Cyclones (1990-2016)". India Meteorological Department. Retrieved 8 February 2017.

[jtwc-01-7] ^ ^a ^b ^c ^d ^e ^f "Best Track Data for Tropical Cyclone Laila (01B)". International Best Track Archive for Climate Stewardship (IBTrACS). National Oceanic and Atmospheric Administration. Retrieved 8 February 2018.

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