North Indian cyclone season 2012

North Indian cyclone season 2012

All the storms of the season
Formation of the first storm	October 10, 2012
Dissolution of the last storm	December 25, 2012
Strongest storm	Nilam - 990  hPa  ( mbar ), 45  kn  (85  km / h )  (3 minutes)
Depression	5
Deep Depression	5
Cyclonic storms	2
Severe cyclonic storms	0
Total number of victims	128 total
Total damage	~ $ 56.7 million   (2012)
North Indian cyclone seasons 2010 , 2011 , 2012 , 2013 , 2014

The cyclone season in the Northern Indies 2012 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 according to the Saffir-Simpson hurricane wind scale , while 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 .

• Murjan
• Nilam
• Mahasen  (unused)
• Phailin  (unused)
• Helen  (unused)
• Lehar  (unused)

Storms

Deep Depression BOB 01

Deep Depression ( IMD )
Duration	October 10th - October 11th
intensity	30 kn (55 km / h ) (3 minutes) , 1002 hPa

On October 10, IMD began monitoring a depression that originated from an area of ​​convection that could have formed from the remnants of Tropical Storm Gaemi from the western Pacific. When the BOB 01 depression system was updated, it was located approximately 350 km southeast of Calcutta . During the day the Depression slowly moved north and landed over Bangladesh early on October 11th . After the system went ashore, the IMD issued the final warning about the depression as it weakened to an area of ​​low air pressure.

The storm brought strong winds and heavy rains to Bangladesh and caused great damage. At least 1,500 mud, thatch, and tin houses were destroyed and 30,000 more were damaged. At least 43 people died in Bangladesh. A total of 106,585 people were affected by the storm. The greatest damage was reported along the coast. Several thousand fishermen were missing at sea. However, this number has already been reduced to 60. No storm warnings were issued along the coast of Bangladesh because the forecast of a strong storm did not exist. The storm's post-analysis found that the Depression was actually a Deep Depression before it landed via Bangladesh.

Cyclonic storm Murjan (01A)

Cyclonic Storm ( IMD )
Tropical storm
Duration	October 23 - October 26
intensity	40 kn (75 km / h ) (3 minutes) , 1000 hPa

Early on October 23, the IMD reported that an area of ​​low air pressure in the southeastern Arabian Sea had intensified into a depression and therefore assigned it the designation ARB 01 . At the time of the update, the system was approximately half a mile west of Lakshadweep . After the upgrade, the depression rapidly intensified into a deep depression before the JTWC issued a Tropical Cyclone Formation Alert on the system. Late on October 24th, the IMD reported that the Deep Depression had intensified into a cyclonic storm and therefore gave it the name Murjan . Murjan continued its westward course because of a subtropical ridge to the north and was able to maintain its intensity in an area of ​​only light wind shear. On the afternoon of October 25th, Murjan went ashore over the Bari region in Somalia as a cyclonic storm and therefore later weakened into a tropical depression. At 06:00 UTC on October 26th, the IMD issued the final warning on Murjan.

In connection with the storm, there were reports of major flooding in Boosaaso . Murjan brought high winds and heavy rains to Somalia , but none of them were killed.

Cyclonic Storm Nilam (02B)

Cyclonic Storm ( IMD )
Tropical storm
Duration	October 28th - November 1st
intensity	45 kn (85 km / h ) (3 minutes) , 990 hPa

An area of ​​convection crossed the Isthmus of Kra on October 23, moving from the Gulf of Thailand to the Bay of Bengal . The area slowly organized and the JTWC issued a Tropical Cyclone Formation Alert on the system on October 28 at 3:30 am UTC. Later that day, the IMD updated the system on Depression BOB 02 . At the time of this update, the depression was located approximately 550 km east-northeast of Trincomalee , Sri Lanka . The system quickly intensified into a deep depression on October 29th. Later that day, the JTWC upgraded the system to a tropical storm and designated it 02B . The Deep Depression continued to develop on October 30th, and the IMD upgraded it to a cyclonic storm named Nilam that same day . On October 31, Nilam is near Mamallapuram , in the state of Tamil Nadu in India , with wind speeds of 100 km / h of the country and began to weaken at what the JTWC prompting issue the final warning to Nilam. In the early hours of November 1st, the storm weakened inland to a deep depression. As Nilam moved further and further into the mainland and was already far west of Chennai , the system weakened into a depression and completely dissolved over northern Karnataka , India that same evening .

The storm brought heavy rains to Sri Lanka . A woman was killed by a fallen tree that fell on her home during the strong winds in Galle district . Public transport was paralyzed for a while due to the lack of electricity. In Chennai , India , all schools and all colleagues were closed. A total of 75 people have been killed by the storm so far.

Deep Depression BOB 03 (03B)

Deep Depression ( IMD )
Tropical storm
Duration	November 17th - November 19th
intensity	30 kn (55 km / h ) (3 minutes) , 1002 hPa

On November 12th, an area of ​​disturbed weather developed over the Bay of Bengal . The disruption was slowly organizing itself and the JTWC published a Tropical Cyclone Formation Alert on the system on November 17th. On the same day, the IMD upgraded it to a depression and named it BOB 03 . As the depression began to form more and more convection, the IMD classified it as a deep depression that same evening. On the night of November 18, the JTWC began issuing warnings about the system and classified it as a tropical storm, which was designated 03B . During November 18, strong wind shear from the southwest began to weaken the system and it lost most of the convection. The following day the IMD reported that BOB 03 had weakened into a depression. Only a little later, the JTWC did not issue any more warnings about the storm. On the evening of November 19, the IMD reported that the system had weakened in an area of ​​low air pressure and published the final warning.

Deep Depression ARB 02 (04A)

Deep Depression ( IMD )
Tropical storm
Duration	December 22nd - December 25th
intensity	30 kn (55 km / h ) (3 minutes) , 1002 hPa

On December 19, an area of ​​low air pressure developed over the Arabian Sea . It slowly moved west, organized itself and was updated on the morning of December 22nd by the IMD on the ARB 02 depression . The JTWC did so in the early morning of December 23rd and upgraded the system to a tropical storm, named 04A . The IMD then updated the depression to a deep depression. As the system progressed, on December 24th the system moved strictly westward into an area of ​​strong wind shear. This ensured that the circulation largely dissolved and that the JTWC and the IMD published their last warnings on December 25th.

Season overview

See also

• Atlantic hurricane season 2012
• 2012 Pacific hurricane season
• 2012 Pacific typhoon season
• Cyclone seasons in the Southwest Indicator: 2011–2012 , 2012–2013
• Australian cyclone seasons: 2011–2012 , 2012–2013
• South Pacific Cyclone Seasons: 2011–2012 , 2012–2013

Individual evidence

1. ↑ JTWC Tropical Cyclone Formation Alert on October 28, 2012 ( English ) JTWC. October 28, 2012. Archived from the original on October 28, 2012. Retrieved on October 28, 2012.
2. ↑ Bulletin 001 for Depression BOB 02 ( English ) IMD. October 28, 2012. Archived from the original on October 28, 2012. Retrieved on October 28, 2012.
3. ↑ Advisory 004 for Deep Depression BOB 02 ( English ) IMD. October 29, 2012. Archived from the original on October 29, 2012. Retrieved on October 30, 2012.
4. ↑ Tropical Cyclone 02B (Two) JTWC Warning 001 ( English ) JTWC. October 29, 2012. Archived from the original on October 29, 2012. Retrieved on October 29, 2012.
5. ↑ Advisory 010 for Cyclonic Storm Nilam ( English ) IMD. October 30, 2012. Archived from the original on October 30, 2012. Retrieved on October 30, 2012.