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| '''BOB 03''' || {{Sort|03|July 30 – August 1}} || bgcolor=#{{storm colour|niodepression}}|{{Sort|1|Depression}} || bgcolor=#{{storm colour|niodepression}}|{{Sort|045|45 km/h (30 mph)}} || bgcolor=#{{storm colour|niodepression}}|{{sort|0995|995 hPa (29.26 inHg)}} || Bangladesh, India || None || None ||
| '''BOB 03''' || {{Sort|03|July 30 – August 1}} || bgcolor=#{{storm colour|niodepression}}|{{Sort|1|Depression}} || bgcolor=#{{storm colour|niodepression}}|{{Sort|045|45 km/h (30 mph)}} || bgcolor=#{{storm colour|niodepression}}|{{sort|0999|Unknown)}} || Bangladesh, India || None || None ||
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{{TC Areas affected (Bottom)|TC's=3 systems|dates=May 10 – Currently active|winds=85 km/h (50 mph)|pres=990 hPa (29.23 inHg) || damage=>$5.14 million|deaths=107|Refs=}}
{{TC Areas affected (Bottom)|TC's=3 systems|dates=May 10 – Currently active|winds=85 km/h (50 mph)|pres=990 hPa (29.23 inHg) || damage=>$5.14 million|deaths=107|Refs=}}

Revision as of 14:32, 4 August 2013

2013 North Indian Ocean cyclone season
Season summary map
Seasonal boundaries
First system formedMay 10, 2013
Last system dissipatedCurrently active
Strongest storm
NameMahasen
 • Maximum winds85 km/h (50 mph)
(3-minute sustained)
 • Lowest pressure990 hPa (mbar)
Seasonal statistics
Depressions3
Deep depressions1
Cyclonic storms1
Total fatalitiesAt least 107 total
Total damageAt least $5.14 million (2013 USD)
North Indian Ocean tropical cyclone seasons
2011, 2012, 2013, Post-2013

The 2013 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, 4 to 6 storms form in this basin every season.[1]

Season summary

Cyclone Mahasen

Storms

Cyclonic Storm Mahasen

Cyclonic storm (IMD)
Tropical storm (SSHWS)
 
DurationMay 10 – May 17
Peak intensity85 km/h (50 mph) (3-min);
990 hPa (mbar)
Main article: Cyclone Mahasen

Originating from an area of low pressure over the southern Bay of Bengal in early May 2013, Mahasen slowly consolidated into a depression on May 10.[2] The depression gained forward momentum and attained gale-force winds on May 11 and was designated as Cyclonic Storm Mahasen, the first named storm of the season.[3] Owing to adverse atmospheric conditions, the depression struggled to maintain organized convection as it moved closer to eastern India.[4] On May 14, the exposed circulation of Mahasen turned northeastward.[5] The following day, conditions again allowed for the storm to intensify. Early on May 16, the cyclone attained its peak intensity with winds of 85 km/h (50 mph) and a barometric pressure of 990 mbar (hPa; 29.18 inHg).[6] Shortly thereafter Mahasen made landfall near Chittagong, Bangladesh.[7] On May 17, it moved over the eastern Indian state of Nagaland.[8]

Early in the storm's existence, it brought flooding rains to much of northwestern Indonesia, resulting in significant damage. At least four people died and six others were reported missing.[9][10] In preparation for the storm, large-scale evacuations were recommended for parts of Myanmar. This resulted with people overcrowding boats to escape, and one or several vessels capsized, causing at least 39 deaths; 42 people were rescued while 19 others were unaccounted for and feared dead.[11][12] The storm's expansive cloud mass also brought unsettled weather to Sri Lanka, Thailand, and southeastern India. Severe storms in India and Sri Lanka were responsible for at least 16 fatalities and significant damage;[13][14] one person died in Thailand.[15] Striking Bangladesh in a weaker state than initially expected, damage was moderate to severe. A total of 95,003 poorly constructed huts were damaged or destroyed, 17 people died, and nearly 1.3 million were affected across the country.[16][17] Losses to crops exceeded ৳400 million (US$5.14 million).[18] Myanmar was spared damage and further casualties.[19]

Depression BOB 02

Depression (IMD)
 
DurationMay 29 – May 31
Peak intensity45 km/h (30 mph) (3-min);
990 hPa (mbar)

An upper air cyclonic circulation developed into a low pressure area on 28 May. It slowly organized itself, and favorable conditions led to the intensification of the low pressure area to a depression by the early hours of 29 May.[20] Slightly intensifying thereafter, the storm took a northward track and crossed the West Bengal coast in the evening hours of the same day, with peak winds of 45 km/h (28 mph).[21] The depression attained its minimum central pressure of 990 mbar (29 inHg) on 30 May. Staying almost a day inland maintaining depression strength, it weakened gradually and dissipated over the states of Bihar and Jharkhand in the evening hours of 31 May due to land interaction and reduced moisture availability.[22]

Depression BOB 03

Depression (IMD)
 
DurationJuly 30 – August 1
Peak intensity45 km/h (30 mph) (3-min);

A low pressure area formed over the Bay of Bengal on July 29. It intensified gradually, and the IMD classified the storm as a Depression in the early hours of July 30. The system made landfall between Balasore, Odisha and Digha, West Bengal by the same evening. Spending an entire day inland, the depression weakened into a well-marked low pressure area on August 1 over the state of Madhya Pradesh in India.[23]

The storm's precursor brought heavy rainfall to coastal Bangladesh. 30,000 people were marooned as a result of the following severe floods in Kalapara Upazila.[24] In India, a Storm Warning Signal-3 was hoisted in the ports of Odisha, and fishermen were cautioned against venturing into the sea.[25]

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.

  • Helen (unused)
  • Lehar (unused)
  • Madi (unused)
  • Na−nauk (unused)

Season effects

This is a table of all storms in the 2013 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 2013 USD.

Name Dates Peak intensity Areas affected Damage
(USD) 		Deaths Refs
Category Wind speed Pressure
Mahasen May 10 – 17 Cyclonic storm 85 km/h (50 mph) 990 hPa (29.23 inHg) Indonesia, Thailand, Sri Lanka, India, Bangladesh, Myanmar >$5.14 million 107
BOB 02 May 29 – 31 Depression 45 km/h (30 mph) 990 hPa (29.23 inHg) Bangladesh, India None None
BOB 03 July 30 – August 1 Depression 45 km/h (30 mph) Unknown) Bangladesh, India None None
Season aggregates
3 systems May 10 – Currently active 85 km/h (50 mph) 990 hPa (29.23 inHg) >$5.14 million 107

See also

References

  1. ^ "IMD Cyclone Warning Services: Tropical Cyclones".
  2. ^ India Meteorological Department (May 10, 2013). "Tropical Weather Out For North Indian Ocean Issued At 1200 UTC Of 10 May, 2013". India Meteorological Department. Retrieved 10 May 2013.
  3. ^ India Meteorological Department (May 11, 2013). "Cyclone Mahasen over southeastern Bay of Bengal, CWIND Bulletin 5". India Meteorological Department. Retrieved May 11, 2013.
  4. ^ Joint Typhoon Warning Center (May 12, 2013). "Tropical Cyclone 01B (Mahasen) Warning Nr 008". United States Navy. Retrieved May 12, 2013.
  5. ^ Joint Typhoon Warning Center (May 14, 2013). "Tropical Cyclone 01B (Mahasen) Warning Nr 017". United States Navy. Archived from the original on 2013-05-14 0845Z. Retrieved May 14, 2013. {{cite web}}: Check date values in: |archivedate= (help)
  6. ^ "Tropical Storm 'Mahasen' Advisory No. 41" (PDF). India Meteorological Department. May 16, 2013. Retrieved May 16, 2013.
  7. ^ "Tropical Storm 'Mahasen' Adviosry No. 43" (PDF). India Meteorological Department. May 16, 2013. Retrieved May 16, 2013.
  8. ^ "Depression over Manipur weakened" (PDF). India Meteorological Department. May 17, 2013. Retrieved May 17, 2013.
  9. ^ "Thousands homeless from floods in Indonesia's Aceh district". Jakarta, Indonesia: United Press International. May 11, 2013. Retrieved May 16, 2013.
  10. ^ Aris Cahyadi (May 13, 2013). "Aceh Landslide Kills 3 Bus Passengers". Jakarta Globe. Retrieved May 16, 2013.
  11. ^ Associated Press (May 14, 2013). "Cyclone Mahasen: Boats Carrying Fleeing Rohingya Muslims Capsize Off Coast Of Myanmar". Sittwe, Myanmar: The Huffington Post. Retrieved May 14, 2013.
  12. ^ Gaurav Raghuvanshi and Syed Zain Al-Mahmood (May 16, 2013). "Cyclone Mahasen Weakens as It Hits Bangladesh". Wall Street Journal. Retrieved May 16, 2013.
  13. ^ Press Trust of India (Mat 14, 2013). "Cyclone 'Mahasen' hits Sri Lanka, seven killed". Colombo, Sri Lanka: Times of India. Retrieved May 14, 2013. {{cite news}}: Check date values in: |date= (help)
  14. ^ Press Trust of India (May 13, 2013). "Eight killed, four injured in Andhra Pradesh cyclonic storm". Hyderabad, India: New Delhi Television Limited. Retrieved May 14, 2013.
  15. ^ "Turbulent seas at west coast; 1 person killed during storm's passing". Nakhon Sawan, Thailand: National News Bureau of Thailand. May 14, 2013. Retrieved May 14, 2013.
  16. ^ "Disaster relief emergency fund (DREF) Bangladesh: Tropical Cyclone Mahasen" (PDF). International Federation of Red Cross and Red Crescent Societies. ReliefWeb. May 18, 2013. Retrieved May 18, 2013.
  17. ^ Deutsche Presse-Agentur (May 17, 2013). "Bangladesh assesses cyclone damage as toll climbs to 17". The Hindu. Retrieved May 17, 2013. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
  18. ^ "Mahasen aftermath: Thousands under the open sky". Dhaka Tribune. May 18, 2013. Retrieved May 18, 2013. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
  19. ^ Paul Vrieze and Htet Naing Zaw (May 16, 2013). "Cyclone Mahasen Misses Burma, Bringing Relief to Displaced Rohingyas". Sittwe, Myanmar: The Irrawaddy. Retrieved May 16, 2013. {{cite web}}: Italic or bold markup not allowed in: |publisher= (help)
  20. ^ India Meteorological Department. "Depression BOB 02 Bulletin 01". India Meteorological Department. Retrieved 2 June 2013.
  21. ^ India Meteorological Department. "Special Tropical Weather Outlook issued at 1600 UTC, 29 May 2013". India Meteorological Department. Retrieved 2 June 2013.
  22. ^ India Meteorological Department. "Depression BOB 02 Bulletin 13". India Meteorological Department. Retrieved 2 June 2013.
  23. ^ India Meteorological Department. "IMD Cyclone Warning Bulletin 9 Issued at 1130 IST, August 1, 2013". India Meteorological Department. Retrieved 1 August 2013.
  24. ^ Swapan, Anisur Rahman (28 July 2013). "30,000 people marooned in coastal Kalapara". Dhaka Tribune. Retrieved 2 August 2013.
  25. ^ IANS (30 July 2013). "Depression over Bay of Bengal, Odisha fishermen alerted". The Times of India. Retrieved 2 August 2013.
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