2012 North Indian Ocean cyclone season
The cyclone season in 2012 Nordindik has no official boundaries as is usual in other basins, but runs throughout the year. However, the tropical cyclones form in this basin is usually from April to December, the months before and after the monsoon season, ie April / May and October / November are the most active. A tropical cyclone in the Indian Ocean is called the cyclone.
The Regional Specialized Meteorological competent Centre ( RSMC ) is the India Meteorological Department in New Delhi. This awards for those tropical cyclones that reach at least the status of a cyclone, a name. Low pressure areas ( depending on the wind speed Depression or deep depression ) are numbered consecutively, with the letters BOB indicates that the system formed in the Bay of Bengal. The letters ARB are mutatis mutandis to the Arabian Sea.
Through the Joint Typhoon Warning Center ( JTWC ) in Honolulu independent forecasts and warnings are issued for the U.S. facilities in the Indian Ocean. By the JTWC classification according to the Saffir -Simpson Hurricane Scale, the RSMC used for classification own criteria occurs at, which include the measurement of the ongoing wind speed is based on the basis of a three-minute observation.
Storm names
Tropical cyclones in the Indian Ocean are named by the RSMC the India Meteorological Department. The names are used once, so there is no name of devastating storms are deleted after the end of the season from the list of names of tropical cyclones.
- Murjan
- Nilam
- Mahasen (unused)
- Phailin (unused)
- Helen (unused)
Storms
Deep Depression BOB 01
On October 10, the IMD began with the monitoring of depression that originated from an area of convection and could be formed by using the remnants of Tropical Storm Gaemi from the Western Pacific. As the system for Depression BOB 01 has been updated, it was located about 350 km south-east of Calcutta. During the day the depression moved slowly north and moved early on October 11 over Bangladesh on land. After the system went ashore, the IMD the last warning issued to the depression, when she weakened to an area of low pressure air.
The storm brought strong winds and heavy rains to Bangladesh and caused great damage. At least 1500 mud, straw and Zinnhäuser were destroyed and 30,000 more were damaged. In Bangladesh, at least 43 people died. A total of 106 585 people were affected by the storm. The greatest damage was reported along the coast. On the sea, several thousand fishermen were missing. This number, however, was already reduced to 60. Along the coast of Bangladesh no storm warnings have been issued since the prediction for a strong storm did not exist. In the post-analysis of the storm, it was found that depression was actually a deep depression before they went ashore on Bangladesh.
Cyclonic storm Murjan ( 01A )
Early on 23 October, the IMD reported that an area of low pressure air had intensified in the southeastern Arabian Sea into a depression and forgave this is why the name of ARB 01, the time of updating the system was about 800 kilometers west of Lakshadweep. After the promotion, the depression intensified rapidly into a deep depression before the JTWC Tropical Cyclone Formation Alert a published to the system. Late on October 24, the IMD reported that the depression had intensified into a Deep cyclonic storm and forgave about the name Murjan. Murjan continued its westward course continue because of a subtropical ridge to the north and was able to maintain its intensity in an area of only slight wind shear. On the afternoon of October 25th Murjan went through the region of Bari in Somalia than a Cyclonic storm ashore and weakened about later into a tropical depression off. At 06:00 UTC on October 26, the IMD the last warning to Murjan issued.
In connection with the storm there were reports of large floods in Boosaaso. Murjan brought strong winds and heavy rains to Somalia, but of which no one was killed.
Cyclonic storm Nilam ( 02B )
An area of convection crossed on 23 October, the Isthmus of Kra and thus moved from the Gulf of Thailand in the Gulf of Bengal. The area slowly and organized the JTWC issued on 28 October at 03:30 UTC a Tropical Cyclone Formation clock alert to the system. Later the same day, the IMD upgraded the system for Depression BOB 02 At the time of updating the depression was located about 550 km east- northeast of Trincomalee, Sri Lanka. The system could rapidly intensify into a deep depression on October 29. Later that day the JTWC downgraded the system to a tropical storm up and described this as a 02B. The Deep Depression developed always continue on October 30 and the IMD classified them on the same day to a cyclonic storm that was named Nilam. On October 31, Nilam is near Mamallapuram in Tamil Nadu in India with wind speeds of 100 km / h on land and began to weaken what the JTWC prompting issue the final warning to Nilam. In the early morning hours of 1 November, the storm weakened inland to a deep depression. As Nilam increasingly moved into the mainland and was already far west of Chennai, the system weakened into a depression and dissipated on the same evening over northern Karnataka, India completely.
The storm brought heavy rains to Sri Lanka. A woman was killed by a fallen tree that fell on their house during the high winds in the Galle district. Public transport were paralyzed for some time due to lack of electricity. In Chennai, India all schools and all colleague were closed. Total so far 75 people have been killed by the storm.
Deep Depression BOB 03 ( 03B )
On November 12, arose over the Bay of Bengal an area disturbed weather. The fault could be organized slowly and the JTWC issued a Tropical Cyclone on November 17, Formation Alert on the system. On the same day the IMD classified it into a depression up and gave this the name BOB 03 When the depression made more and more convection, the IMD classified them on the same evening as a deep depression. On the night of November 18 and the JTWC warnings to the system began to issue and classified this into a tropical storm, which was designated 03B. During the 18th November, strong wind shear from the southwest began to weaken the system and it lost most of the convection. The following day the IMD, the BOB had 03 weakened into a depression reported. A little later, the JTWC also gave no warnings to the storm out more. On the evening of 19 November reported the IMD that the system had weakened into an area of low pressure air and so published the final warning.
Deep Depression ARB 02 ( 04A )
On December 19, emerged over the Arabian Sea is a region of low pressure air. It slowly moved toward the west, and was organized on the morning of 22 December, the IMD to depression ARB updated 02. The JTWC did this in the early morning of 23 December and also downgraded the system to a tropical storm that was designated 04A. Then updated the IMD depression to a deep depression. In the further course, the system moved on December 24, strictly in the west and reaches an area of strong wind shear. This ensured that the circulation largely disbanded and the JTWC and IMD on 25 December each published the last warnings.