North Indian cyclone season 2011

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North Indian cyclone season 2011
All the storms of the season
All the storms of the season
Formation of the
first storm
February 2, 2011
Dissolution of the
last storm
December 31, 2011
Strongest storm Thane - 972  hPa  ( mbar ), 75  kn  (140  km / h )  (3 minutes)
Depression 10
Deep Depression 6th
Cyclonic storms 2
Severe cyclonic storms 1
Total number of victims 20 direct
Total damage Unknown
North Indian cyclone seasons
2009 , 2010 , 2011 , 2012 , 2013

The cyclone season in the North Indies 2011 has no official limits, as is usual in other basins, but runs all year round. The tropical cyclones usually form in this basin between April and December, with the months before and after the monsoon season , i.e. April / May and October / November, being the most active. A tropical cyclone in the Indian Ocean is known as a cyclone .

The responsible Regional Specialized Meteorological Center (RSMC) is the India Meteorological Department in New Delhi . This gives a name to those tropical cyclones that have at least the status of a cyclone. Low pressure areas (depending on the wind speed depressions or deep depressions ) are numbered consecutively, with the letter combination BOB indicating that the system was formed in the Bay of Bengal . The letters ARB stand for the Arabian Sea .

The Joint Typhoon Warning Center (JTWC) in Honolulu issues separate warnings and forecasts for the US facilities in the Indian Ocean. The JTWC classifies them according to the Saffir-Simpson hurricane wind scale . The RSMC uses its own criteria for the classification, which are based, among other things, on the measurement of the continuous wind speed on the basis of a three-minute observation.

Storm names

Tropical cyclones in the Indian Ocean are named by the RSMC of the India Meteorological Department . The names are used only once each, so no devastating storm names are removed from the list of tropical cyclone names after the season ends .

  • Keila
  • Thane
  • Murjan  (unused)
  • Nilam  (unused)
  • Mahasen  (unused)
  • Phailin  (unused)

Storms

Depression BOB 01

Depression ( IMD )
BOB 01 - 2 feb.jpg BOB01 2011 track.png
Duration February 2nd - February 3rd
intensity 25 kn (45 km / h ) (3 minutes) , 1002 hPa

On February 2, the India Meteorological Department (IMD) classified a low pressure area about 100 km southeast of Pottuvil , Sri Lanka , as a tropical depression BOB 01 . The convection within the system increased as the system drifted towards land. Early the next day, the IMD downgraded the system to a residual low because the proximity to land caused a weakening.

After severe flooding in Sri Lanka in December 2010 and January 2011, the tropical system brought further extensive rainfall to the island. At least six people were killed by the flooding and another five were missing. More than 250,000 Sri Lankans have been affected by the effects of the system.

Depression ARB 01 (01A)

Depression ( IMD )
Tropical storm
ARB 01 11 June 2011 MODIS.jpg ARB01 2011 track.png
Duration June 11th - June 12th
intensity 25 kn (45 km / h ) (3 minutes) , 996 hPa

In early June, a low pressure area formed over the Arabian Sea. This stayed almost stationary and got stronger. On June 11, the India Meteorological Department (IMD) classified the low pressure area as a tropical depression and gave it the designation ARB 01 . On the same day, the system was classified as Tropical Cyclone 01A by the Joint Typhoon Warning Center (JTWC) . At the time, the center was about 180 km northwest of Mumbai and 150 km southeast of Veraval , Gujarat . On June 12, the system crossed the coast of Saurashtra about 25 km east of Diu . It weakened to a well-marked low pressure area , so the IMD stopped warnings about the system. The JTWC did not issue any further warnings either.

Deep Depression BOB 02

Deep Depression ( IMD )
Deep Depressin BOB 02 16 June 2011.jpg BOB02 2011 track.png
Duration June 16 - June 23
intensity 35 kn (65 km / h ) (3 minutes) , 978 hPa

On June 16, the India Meteorological Department (IMD) upgraded an area with a low pressure area at l21 ° 30'N and 89 ° 00'E, about 150 km southeast of Kolkata , to a depression, the second in the 2011 Gulf cyclone season from Bengal ( BOB 02 ).

During the day the system intensified to a deep depression. It moved over the coast of West Bengal , about 100 km east of Sagar Island . On the same day at 7:00 p.m. UTC , the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert (TCFA). The system continued to drift inland and the next day the JTWC picked up its TCFA. The system weakened to a depression on June 18, overlying Jharkhand .

Country depression 01

Depression ( IMD )
COUNTRY 01 Jul 22 2011 0735Z.jpg 2011 NIO Land depression 01 track.png
Duration July 22nd - July 23rd
intensity 20 kn (35 km / h ) (3 minutes) , 990 hPa

When the Madden-Julian Oscillation entered its fifth phase, conditions in the Bay of Bengal became favorable for tropical cyclogenesis . These conditions and a cyclonic vortex in the upper troposphere led to the formation of a low pressure area over West Bengal on July 21, about 50 km southeast of Daltonganj . The next day, IMD reported that the system had evolved into the first tropical depression of the season, which formed over land. The three-minute continuous wind speeds were determined to be 35 km / h. During the course of the day, the system moved northwest under the influence of a monsoon channel and weakened into a low pressure area early on July 23.

The system caused heavy rain in the states of Madhya Pradesh , Rajasthan , Gujarat, Chhattisgarh and Vidarbha , but no damage was reported.

Depression BOB 03

Depression ( IMD )
Depression BOB 03 September 22nd 2011.jpg BOB03 2011 track.png
Duration September 22nd - September 23rd
intensity 25 kn (45 km / h ) (3 minutes) , 995 hPa

Late on September 20, a low pressure area developed about 370 km south of Chittagong , Bangladesh . Under the influence of strong vertical wind shear and monsoon activity in the Bay of Bengal, the system initially failed to strengthen and the JTWC later reported that it had disintegrated. However, on September 22nd, the IMD classified the system as Depression BOB 03 and started issuing storm warnings. Late that day, BOB 03 drifted northwest towards the coast and reached overland at Balasore in the north of the state of Orissa . The depression initially moved further northwest, but then remained more or less stationary over Jharkhand . On the evening of September 23, the IMD stated in its last bulletin on BOB 03 that the depression had weakened into a severe residual low pressure area.

After the landfall, heavy rainfall created a risk of flooding for the second time within two weeks in the catchment area of ​​the Bramhani and Baitarani rivers . On the evening of September 22nd, 90 villages in Jajpur had to be evacuated because the latter was badly swollen.

Deep Depression BOB 04 (02B)

Deep Depression ( IMD )
Tropical storm
Deep Depression BOB04 Oct 19 2011.jpg BOB04 2011 track.png
Duration October 19 - October 20
intensity 30 kn (55 km / h ) (3 minutes) , 1000 hPa

Cyclonic Storm Keila (03A)

Cyclonic Storm ( IMD )
Tropical storm
Keila Nov 2 2011 0920Z.jpg Keila 2011 track.png
Duration October 29th - November 4th
intensity 35 kn (65 km / h ) (3 minutes) , 996 hPa

Under the influence of a low pressure trough about one thousand kilometers east of Mogadishu , a low pressure area developed at the end of October, which intensified and was classified as Depression ARB 02 by the RSMC in New Delhi on October 29 . The system initially migrated westwards towards the Gulf of Aden , but temporarily embarked on an almost north-northwestern trajectory on October 30, until it returned to a westerly direction on the afternoon of October 31. On November 1st, the system intensified into a deep depression and a day later into a cyclonic storm. This was named Keila by the RSMC in New Delhi . Initially, a landfall was predicted on the border between Yemen and Oman , but the storm moved very slowly and then moved north.

The storm crossed the coast not far from Salalah , and in the evening the RSMC downgraded Keila to a Deep Depression. A day later, the meandering system in the coastal area weakened to a depression and then a low pressure area, so that the IMD issued its last warning about ex-Keila.

Heavy rain caused flash floods in Oman , killing at least 14 people and injuring 200 others. Floods made it necessary to evacuate a hospital in the Omani capital of Muscat on November 3rd.

Deep Depression ARB 03 (04A)

Deep Depression ( IMD )
Tropical storm
ARB 03 Nov 7 2011 0635Z.jpg ARB03 2011 track.png
Duration November 6th - November 10th
intensity 30 kn (55 km / h ) (3 minutes) , 1000 hPa

On November 6th, the India Meteorological Department classified a low pressure area as a depression and assigned the designation ARB 03 to the system . The Joint Typhoon Warning Center (JTWC) saw at 8:00 p.m. UTC the same day the system was 725  nautical miles east of Cape Guardafui that it met the requirements to issue a Tropical Cyclone Formation Alert . The system slowly migrated west towards the Gulf of Aden and organized itself. It was upgraded to Deep Depression at 6:00 a.m. UTC on November 8th.

Deep Depression ARB 04 (05A)

Deep Depression ( IMD )
Tropical storm
Deep Depression ARB 04 on 29 Nov near Peak Intensity.png ARB04 2011 track.png
Duration November 26th - December 1st
intensity 30 kn (55 km / h ) (3 minutes) , 998 hPa

On November 26th at 11:30 a.m. IST the India Meteorological Department (IMD) classified a low pressure area near the southern tip of India near Kanyakumari as a depression and assigned the designation ARB 04 . The system was classified as Tropical Storm 05A by the Joint Typhoon Warning Center (JTWC) on the same day . The system initially moved west-northwest. It was upgraded to Deep Depression by the IMD on November 28th, but lost that status the next day. The JTWC issued its final warning about the system on November 30th.

The system caused numerous damage as it passed Sri Lanka and the southern tip of India. In Sri Lanka, heavy rain resulted in the deaths of 19 people and 5,700 houses damaged.

Very Severe Cyclonic Storm Thane (06B)

Very Severe Cyclonic Storm ( IMD )
Category 2 cyclone
Thane 2011 Dec 29 0735Z.jpg Thane 2011 track.png
Duration December 25th - December 31st
intensity 75 kn (140 km / h ) (3 minutes) , 972 hPa

On December 25, the IMD reported the formation of a depression over the southeastern Gulf of Bengal, about 1,000 km southeast of Chennai . The JTWC classified the system as tropical cyclones 06B during the day . The system slowly migrated northwards and deepened into a Deep Depression on December 26th, and then headed northwest and then westerly on December 27th. On the same day, the system intensified into a cyclonic storm and was named Thane by the RSMC . On December 28th, Thane was promoted to a severe cyclonic storm and a few hours later Thane achieved very severe cyclonic storm status. The storm moved almost due west at this stage and reached the Tamil Nadu coast between Cuddalore and Puducherry early on December 30th. The system quickly weakened overland. It crossed the southern tip of India and reached the waters of the Arabian Sea on December 31, but was unable to re-intensify.

Season overview

See also

Individual evidence

  1. IMD Cyclonic Bulletin 01 For Depression BOB 01 ( English ) India Meteorological Department . Archived from the original on February 2, 2011. Retrieved February 2, 2011.
  2. ^ Tropical Weather Outlook - February 2, 1400z ( English ) India Meteorological Department . Archived from the original on February 2, 2011. Retrieved on February 3, 2011.
  3. IMD Cyclonic Bulletin 04 for Depression BOB 01 ( English ) India Meteorological Department . Archived from the original on February 3, 2011. Retrieved on February 3, 2011.
  4. Six dead, over 250,000 affected in Sri Lanka floods ( English ) Colombo Page. February 4, 2011. Retrieved April 21, 2011.
  5. IMD Cyclone Bulletin 01 For Depression ARB 01 ( English ) India Meteorological Department . Archived from the original on June 11, 2011. Retrieved June 11, 2011.
  6. ^ Tropical Cyclone 01A Warning 01 by JTWC ( English ) Joint Typhoon Warning Center . Archived from the original on June 11, 2011. Retrieved June 11, 2011.
  7. IMD Cyclone Bulletin 04 For Depression ARB 01 ( English ) India Meteorological Department . Archived from the original on June 12, 2011. Retrieved June 12, 2011.
  8. IMD Cyclone Bulletin 06 For Depression ARB 01 ( English ) India Meteorological Department . Archived from the original on June 12, 2011. Retrieved June 12, 2011.
  9. IMD Cyclonic Bulletin 01 For Depression BOB 02 ( English ) India Meteorological Department . Archived from the original on June 16, 2011. Retrieved June 16, 2011.
  10. IMD Cyclonic Bulletin 03 For Depression BOB 02 ( English ) India Meteorological Department . Archived from the original on June 16, 2011. Retrieved June 16, 2011.
  11. JTWC TCFA issued for BOB 02 ( English ) Joint Typhoon Warning Center . Archived from the original on June 17, 2011. Retrieved June 17, 2011.
  12. JTWC TCFA cancellation for BOB 02 ( English ) Joint Typhoon Warning Center . Archived from the original on June 17, 2011. Retrieved June 17, 2011.
  13. a b Land Depression 01 - Preliminary report ( English ) India Meteorological Department. Archived from the original on March 30, 2012. Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved October 3, 2011. @1@ 2Template: Webachiv / IABot / www.imd.gov.in
  14. JTWC - Tropical Cyclone Warning 201800 - Depression BOB 03 ( English ) Joint Typhoon Warning Center. Archived from the original on September 22, 2011. Retrieved September 22, 2011.
  15. JTWC - Tropical Cyclone Warning 211800 - Depression BOB 03 ( English ) Joint Typhoon Warning Center. Archived from the original on September 22, 2011. Retrieved September 22, 2011.
  16. IMD - Tropical Cyclone Bulletin 01 - Depression BOB 03 ( English ) India Meteorological Department. Archived from the original on September 22, 2011. Retrieved September 22, 2011.
  17. IMD - Tropical Cyclone Bulletin 04 - Depression BOB 03 ( English ) India Meteorological Department . Archived from the original on September 23, 2011. Retrieved September 23, 2011.
  18. IMD - Tropical Cyclone Bulletin 08 - Depression BOB 03 ( English ) India Meteorological Department. Archived from the original on September 23, 2011. Retrieved September 23, 2011.
  19. Fresh flood fear looms in 5 Orissa districts ( English ) The Times of India. Archived from the original on November 4, 2011. Retrieved September 23, 2011.
  20. IMD: IMD Bulletin 1 for ARB 02 ( English ) IMD. Archived from the original on October 29, 2011. Retrieved October 29, 2011.
  21. Tropical Storm "Keila" Advisory No. Three issued at 1200UTC of 2nd November ( English ) India Meteorological Department . November 2, 2011. Archived from the original on November 2, 2011. Retrieved on November 2, 2011.
  22. Tropical Storm "Keila" Advisory No. Four issued at 1500UTC of 2nd November ( English ) India Meteorological Department . Archived from the original on November 3, 2011. Retrieved November 2, 2011.
  23. Tropical Storm "Keila" Advisory No. Six issued at 2100UTC of 2nd November ( English ) India Meteorological Department . November 2, 2011. Archived from the original on November 3, 2011. Retrieved on November 2, 2011.
  24. Special tropical weather outlook ( English ) India Meteorological Department . Archived from the original on November 4, 2011. Retrieved November 4, 2011: "This is the last bulletin on this system"
  25. 14 killed and 200 injured as tropical storm sweeps across Oman ( English ) In: Al Arabia . November 3, 2011. Archived from the original on November 4, 2011. Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved November 3, 2011. @1@ 2Template: Webachiv / IABot / english.alarabiya.net
  26. IMD Bulletin 1 for ARB 03 ( English ) India Meteorological Department . Archived from the original on November 6, 2011. Retrieved November 6, 2011.
  27. JTWC TCFA For ARB 03 ( English ) Joint Typhoon Warning Center. Archived from the original on November 7, 2011. Retrieved November 7, 2011.
  28. Tropical Weather Outlook for North Indian Ocean, issued at 0600 UTC of November 08, 2011 ( English ) Archived from the original on August 9, 2008. Info: The archive link has been inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. Retrieved November 8, 2011. @1@ 2Template: Webachiv / IABot / www.imd.gov.in
  29. IMD: IMD Warning Bulletin 1 for ARB 04 ( English ) IMD. Archived from the original on November 26, 2011. Retrieved November 26, 2011.
  30. ^ Tropical Storm Warning 2 for 05A ( English ) Joint Typhoon Warning Center. Archived from the original on November 26, 2011. Retrieved November 26, 2011.
  31. IMD Upgradation to Deep depression ( English ) India Meteorological Department. Archived from the original on November 28, 2011. Retrieved November 28, 2011.
  32. IMD ARB 04 Bulletin 19 ( English ) India Meteorological Department. Archived from the original on November 29, 2011. Retrieved on November 29, 2011.
  33. ^ Sri Lanka storm kills 19, damages 5,700 homes (English) , Agence France-Presse. November 27, 2011. Archived from the original on November 27, 2011. 
  34. IMD: Depression BOB 05 Warning 01 ( English ) In: IMD . IMD. Archived from the original on December 25, 2011. Retrieved December 25, 2011.
  35. Deep Depression BOB 05 Warning 3 ( English ) India Meteorological Department. Archived from the original on December 26, 2011. Retrieved on December 26, 2011.
  36. IMD: IMD Warning 8 for Cyclone Thane ( English ) India Meteorological Department. Archived from the original on December 27, 2011. Retrieved December 27, 2011.
  37. IMD Upgradation of Thane to a Severe Cyclonic Storm ( English ) India Meteorological Department. Archived from the original on December 28, 2011. Retrieved on December 28, 2011.
  38. IMD Than VSCS Status ( English ) India Meteorological Department. Archived from the original on December 28, 2011. Retrieved on December 28, 2011.