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The [[Accumulated Cyclone Energy]] (ACE) index for the season as of 15:00&nbsp;[[UTC]] on August&nbsp;30 is 4.625 ACE units.{{#tag:ref|The totals represent the sum of the squares for every (sub)tropical storm's intensity of over 33&nbsp;knots (38&nbsp;mph, 61&nbsp;km/h), divided by 10,000. Calculations are provided at [[Talk:2015 North Indian Ocean cyclone season/ACE calcs]].|group="nb"}}

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Revision as of 15:31, 30 August 2015

2015 North Indian Ocean cyclone season
Season summary map
Seasonal boundaries
First system formedJune 7, 2015
Last system dissipatedCurrently active
Strongest storm
NameKomen
 • Maximum winds75 km/h (45 mph)
(3-minute sustained)
 • Lowest pressure986 hPa (mbar)
Seasonal statistics
Depressions4
Deep depressions3
Cyclonic storms2
Total fatalities265 total
Total damage> $258 million (2015 USD)
North Indian Ocean tropical cyclone seasons
2013, 2014, 2015, Post-2015

The 2015 North Indian Ocean cyclone season is an ongoing event in the annual cycle of tropical cyclone formation. The North Indian Ocean cyclone season has no official bounds, but cyclones tend to form between April and December, with the peak from May to November. These dates conventionally delimit the period of each year when most tropical cyclones form in the northern Indian Ocean.

The scope of this article is limited to the Indian Ocean in the Northern Hemisphere, east of the Horn of Africa and west of the Malay Peninsula. There are two main seas in the North Indian Ocean — the Arabian Sea to the west of the Indian subcontinent, abbreviated ARB by the India Meteorological Department (IMD); and the Bay of Bengal to the east, abbreviated BOB by the IMD.

The official Regional Specialized Meteorological Centre in this basin is the India Meteorological Department (IMD), while the Joint Typhoon Warning Center releases unofficial advisories. On average, four to six storms form in this basin every season.[1]

Season summary

The Accumulated Cyclone Energy (ACE) index for the season as of 15:00 UTC on August 30 is 4.625 ACE units.[nb 1]

Storms

Cyclonic Storm Ashobaa

Cyclonic storm (IMD)
Tropical storm (SSHWS)
 
DurationJune 7 – June 12
Peak intensity85 km/h (50 mph) (3-min);
990 hPa (mbar)

Under the influence of an ongoing onset of a southwest monsoon, a low pressure area formed on June 6. It slowly consolidated, prompting the Joint Typhoon Warning Center (JTWC) to issue a Tropical cyclone formation alert (TCFA) on June 6.[2] The following day, the India Meteorological Department (IMD) issued its first advisory for the system, designating it ARB 01. Later the same day, the JTWC reported the storm had reached tropical cyclone intensity, and on June 8, the IMD upgraded the storm to a cyclonic storm, assigning it the name Ashobaa. The storm continued to track northwestwards for a while, before turning westwards and weakening due to moderate to high wind shear and land interaction.

Due to most of the moisture being drawn into the storm, the onset of the southwest monsoon over the Indian subcontinent was stalled.[3] Torrential rains fell across much of eastern Oman, with Masirah Island receiving 225 mm (8.9 in) of rain in one day and more than 250 mm (9.8 in) overall.[4][5] Significant flooding prompted dozens of evacuations while strong winds caused power outages.[6] Waterlogging was reported in Kalba and Fujairah, in the United Arab Emirates, due to disturbed weather attributed to Ashobaa.[7]

Depression BOB 01

Depression (IMD)
 
DurationJune 20 – June 22
Peak intensity45 km/h (30 mph) (3-min);
994 hPa (mbar)

An area of low pressure developed off the east coast of India on June 17, about 135 nmi (250 km; 155 mi) east-southeast of Visakhapatnam.[8] Over the next two days, deep convection developed along the southern and western periphery of the centre of the system, predominantly under the influence of the advancing southwest monsoon.[9] Due to the moderate-to-strong wind shear caused by the monsoon, the disturbance failed to develop any further, and the JTWC had reported that it dissipated on June 20.[10] At the same time, however, the IMD started tracking this system as a depression, reporting gusts of up to 35 knots (65 km/h; 40 mph)*.[11][12] The depression made landfall over Odisha coast early on June 21, between Gopalpur and Puri.[13] Without any further information, the IMD stopped tracking BOB 01 on June 22.[14]

Rough seas from the depression caught many fishing vessels off-guard, with at least 150 people reported missing offshore on June 21.[15] The vast majority either returned to shore safely or were rescued within a day; however, nine fishermen are feared to have drowned.[16] The entire state of Odisha was put on alert for June 21, 22 and 23. The system brought heavy rains to most of the state, with Malkangiri receiving the highest, 320 mm (13 in) of rain.[17] Access to many towns in the Malkangiri district was blocked due to flooding.[18] At least six deaths took place from flood-related incidents.[15]

Deep Depression ARB 02

See also: June 2015 Gujarat flood
Deep depression (IMD)
 
DurationJune 22 – June 24
Peak intensity55 km/h (35 mph) (3-min);
988 hPa (mbar)

Following the series of monsoonal disturbances, a fresh wave of thunderstorms organized into an area of low pressure on June 21, in the Arabian Sea, off the coast of Gujarat.[19] Deep convection persisted to the west of the system while the circulation continued to develop over the next 24 hours,[20] and the IMD started tracking it as a depression, with the identifier ARB 02.[14] ARB 02 continued to evolve and by the night of June 22, the JTWC issued a TCFA on the system, while it was 285 nmi (528 km; 328 mi) west-northwest of Mumbai.[21]

Torrential rains battered Gujarat, with peak accumulations of 636 mm (25.0 in) in Bagasara, 511 mm (20.1 in) in Dhari, and 400 mm (16 in) in Variyav. Severe flooding ensued across the region, isolating many villages in the Saurashtra region, and prompted mobilization of the National Disaster Response Force and Indian Air Force.[22] Flooding in the Amreli district was reported to be the worst in 90 years; 600 of the district's 838 villages were affected, 400 of which were rendered inaccessible by land.[23] At least 80 people died in the region, with Saurashtra suffering the greatest losses.[24] Ten Asiatic lions, an endangered species with only 523 living individuals documented in May 2015, died during the floods while more than a dozen remain missing.[25][26] The Gujarat government estimated damage at ₹16.5 billion (US$258 million); however, Congress MLA Paresh Dhanani claimed damage to be as high as ₹70 billion (US$1.09 billion).[27]

Cyclonic Storm Komen

Cyclonic storm (IMD)
Tropical storm (SSHWS)
 
DurationJuly 26 – August 2
Peak intensity75 km/h (45 mph) (3-min);
986 hPa (mbar)
See also: 2015 Myanmar floods and Harda twin train derailment

Early on 30 July, the system was upgraded to a cyclonic storm by the IMD and named as Komen.[28]

Torrential rains impacted much of Myanmar, causing widespread flooding. At least 46 people were killed and more than 200,000 were affected.[29] Additionally, at least 17,000 homes were destroyed.[30][31] Tremendous rains fell across southeastern Bangladesh, with accumulations Komen and the monsoonal system it originated from reaching 1,051.2 mm (41.39 in) in Chittagong.[32] The resulting floods killed at least 23 people and affected more than 130,400.[33][34] A landslide in the Bandarban District killed six people.[35] Flooding in Odisha, India, killed five people and affected at least 480,399.[36] At least 69 people died across West Bengal from various incidents directly and indirectly to the storm, such as electrocution and snake bites. A total of 272,488 homes were destroyed while a further 55,899 sustained damage.[37][38] At least 21 people died in Manipur, 20 of whom perished in a landslide that struck Joumol village.[39]

Storm names

Within this basin, a tropical cyclone is assigned a name when it is judged to have reached Cyclonic Storm intensity with winds of 65 km/h (40 mph). The names were selected by members of the ESCAP/WMO panel on Tropical Cyclones between 2000 and May 2004, before the Regional Specialized Meteorological Center in New Delhi started to assign names in September 2004. There is no retirement of tropical cyclone names in this basin as the list of names is only scheduled to be used once before a new list of names is drawn up. Should a named tropical cyclone move into the basin, from the Western Pacific then it will retain its original name. The next six available names from the List of North Indian Ocean storm names are below.

  • Ashobaa
  • Komen
  • Chapala (unused)
  • Megh (unused)
  • Roanu (unused)
  • Kyant (unused)

Season effects

This is a table of all storms in the 2015 North Indian Ocean cyclone season. It mentions all of the season's storms and their names, durations, peak intensities (according to the IMD storm scale), landfall(s) – denoted by bold location names – damages, and death totals. Damage and death totals include the damage and deaths caused when that storm was a precursor wave or extratropical low, and all of the damage figures are in 2015 USD.

Name Dates Peak intensity Areas affected Damage
(USD) 		Deaths Refs
Category Wind speed Pressure
Ashobaa June 7 – 12 Cyclonic storm 85 km/h (50 mph) 990 hPa (29.23 inHg) Oman, United Arab Emirates Minimal None
BOB 01 June 20 – 22 Depression 45 km/h (30 mph) 994 hPa (29.36 inHg) India (Odisha) Minimal 15
ARB 02 June 22 – 24 Deep depression 55 km/h (35 mph) 988 hPa (29.18 inHg) India (Gujarat, Maharashtra) 258 million 80
Komen July 26 – August 2 Cyclonic storm 75 km/h (45 mph) 986 hPa (29.12 inHg) Bangladesh, Myanmar, Northeast India, East India Unknown 170
Season aggregates
4 systems June 7 – Currently active 85 km/h (50 mph) 986 hPa (29.12 inHg) 258 million 265

See also

Wikimedia Commons has media related to 2015 North Indian Ocean cyclone season.

References

  1. ^ "IMD Cyclone Warning Services: Tropical Cyclones".
  2. ^ Joint Typhoon Warning Center (JTWC). "Tropical Cyclone Formation Alert WTIO21 Issued on 06 June 2015 at 1100 UTC". Joint Typhoon Warning Center (JTWC). Retrieved 7 June 2015.
  3. ^ Madaan, Neha (11 June 2015). "Ashobaa stalls monsoon's advance". The Times of India. The Times of India. Retrieved 11 June 2015.
  4. ^ Eric Leister (June 12, 2015). "Rainstorm Ashobaa Slams Oman With Historic Flooding". Accuweather. Retrieved June 12, 2015.
  5. ^ Fahad Al Mukrashi (June 12, 2015). "Heavy rains cause flooding in southern Oman". Muscat, Oman: Gulf News. Retrieved June 12, 2015.
  6. ^ "Widespread flooding as Ashobaa brings heavy rains to Oman". Muscat, Oman: The National. June 12, 2015. Retrieved June 12, 2015.
  7. ^ Rai, Bindu. "Ashobaa Latest: Gale winds to strike Muscat; Waterlogging in Fujairah". Emirates247. Retrieved 11 June 2015.
  8. ^ "Tropical Weather Advisory for Indian Ocean - 18/1800z". NOAA. Retrieved 21 June 2015.
  9. ^ "Tropical Weather Advisory for Indian Ocean - 19/1800z". NOAA. Retrieved 21 June 2015.
  10. ^ "Tropical Weather Advisory for Indian Ocean - 20/1800z". NOAA. Retrieved 21 June 2015.
  11. ^ "Tropical Weather Outlook - 20/0600z". India Meteorological Department. Retrieved 21 June 2015.
  12. ^ "Tropical Weather Outlook - 20/1500z". India Meteorological Department. Retrieved 21 June 2015.
  13. ^ "Tropical Weather Outlook - 21/0600z". India Meteorological Department. Retrieved 21 June 2015.
  14. ^ a b "Tropical Weather Outlook - 22/0600z". India Meteorological Department. Retrieved 22 June 2015.
  15. ^ a b "Heavy rains throw life out of gear in Andhra and Telangana". Hyderabad, India: Nyoooz. June 21, 2015. Retrieved June 24, 2015.
  16. ^ "9 fishermen go missing". Hyderabad, India: Times of India. June 24, 2015. Retrieved June 24, 2015. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
  17. ^ "Depression off Coast: All Districts on Alert". The New Indian Express. Retrieved June 21, 2015.
  18. ^ "Rains disrupt life in many parts of Odisha". Business Standard. Retrieved June 21, 2015.
  19. ^ "Special Tropical Weather Outlook - 21/0600z". USNO. Retrieved 22 June 2015.
  20. ^ "Special Tropical Weather Outlook - 22/0600z". USNO. Retrieved 22 June 2015.
  21. ^ "Tropical Cyclone Formation Alert - 22/2100z". Joint Typhoon Warning Center. Retrieved 23 June 2015.
  22. ^ "Flood-like situation in Gujarat due to heavy rains; 34 dead". Ahmedabad, India: News Nation. Press Trust of India. June 24, 2015. Retrieved June 24, 2015.
  23. ^ "Gujarat's Amreli battles worst flood in 90 years". Rajkot, India: Times of India. June 26, 2015. Retrieved June 27, 2015. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
  24. ^ "Gujarat death toll touches 80, four lakh ex gratia for kin". Ahmedabad, India: Hinudstan Times. June 27, 2015. Retrieved June 27, 2015. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
  25. ^ Mahesh Langa (June 28, 2015). "Gujarat floods kill 7 lions, more than a dozen still missing". Ahmedabad, India: Hindustan Times. Retrieved June 28, 2015. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
  26. ^ "Rains Kill Four More Lions in Gujarat, Toll Climbs to 9". Ahmedabad, India: The New Indian Express. Press Trust of India. June 28, 2015. Retrieved June 28, 2015. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
  27. ^ "Flash flood: Govt announces Rs 300-crore relief package". The Indian Express. July 15, 2015. Retrieved August 2, 2015.
  28. ^ "Tropical Cyclone Advisory Bulletin" (PDF). India Meteorological Department. Archived from the original (PDF) on 30 July 2015. Retrieved 30 July 2015.
  29. ^ "Myanmar Flooding Death Toll Rises as Damage Widens". Kalay, Myanmar: Wall Street Journal. Associated Press. August 3, 2015. Retrieved August 3, 2015. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
  30. ^ "20 killed in Myanmar floods". Yangon, Myanmar: The Hindu. July 28, 2015. Retrieved July 29, 2015. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
  31. ^ "Myanmar flood death toll rises to 27". Yangon, Myanmar: The Sun Daily. Agence France-Presse. July 31, 2015. Retrieved July 31, 2015. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
  32. ^ Nick Wiltgen (July 31, 2015). "Tropical Cyclone Komen Soaking Waterlogged Bangladesh, Myanmar; At Least 33 Reported Dead, 6 Missing". The Weather Channel. Retrieved July 31, 2015.
  33. ^ Stephan Uttom (July 28, 2015). "At least 7 die in Bangladesh floods". Dhaka, Bangladesh: UCA News. Retrieved July 29, 2015.
  34. ^ "Flash floods, landslides bring death to southeastern Bangladesh". Dhaka, Bangladesh: eNCA. Reuters. July 28, 2015. Retrieved July 31, 2015.
  35. ^ "Six killed in Bangladesh landslides". Dhaka, Bangladesh: One India. August 2, 2015. Retrieved August 2, 2015.
  36. ^ "Heavy rains trigger floods in Gujarat, Rajasthan, West Bengal, Odisha; 81 dead". New Delhi, India: IBN Live (CNN). Press Trust of India. August 2, 2015. Retrieved August 2, 2015.
  37. ^ "West Bengal flood death toll rises to 69; CM Mamata Banerjee visits affected areas". Kolkata, India: Daily News and Analysis India. Press Trust of India. August 3, 2015. Retrieved August 3, 2015.
  38. ^ "Floods wreak havoc, claim 81 lives in three states". New Delhi, India: The Tribune. Press Trust of India. August 2, 2015. Retrieved August 2, 2015. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
  39. ^ "Heavy rains wreak havoc in Manipur, West Bengal and Odisha". New Delhi, India: India Today. August 2, 2015. Retrieved August 2, 2015. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)


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