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Cyclone Bijli
Cyclone Bijli (JTWC designation: ''01B'', also known as Cyclonic Storm Bijli), was the first tropical cyclone to form during the 2009 North Indian Ocean cyclone season. Cyclonic Storm Bijli formed from an area of Low Pressure on April 14. Later that evening, RSMC New Delhi upgraded the Low Pressure into a Deep Depression. Joint Typhoon Warning Center issued a Tropical Cyclone Formation Alert and designated Bijli as Tropical Depression 01B. While RSMC New Delhi designated it as Deep Depression, during the morning on April 15. Later that day, both RSMC New Delhi and Joint Typhoon Warning Center issued full warnings on Bijli as it intensifies to a Tropical storm. They also classified Bijli as a Tropical cyclone on that day. But on the morning of April 17, RSMC New Delhi downgraded cyclone Bijli into a deep depression Due to land interaction. However, on April 18, RSMC New Delhi continues to issue warnings on Bijli as it moves toward Northern Myanmar (Burma). The word Bijli refers to lightning in Hindi.
==Meteorological history==
On April 13, an area of shower and thunderstorms became slightly organized over the central Bay of Bengal. Later that day, an area of low pressure developed underneath the convection as the system developed. Weak banding features also formed around the periphery of the storm. By April 14, deep convection persisted around the center of circulation; following the development the RSMC in New Delhi, India designated the system as Depression BOB 01. Following further development, the Joint Typhoon Warning Center (JTWC) issued a Tropical Cyclone Formation Alert (TCFA) as they anticipated the system to develop into a tropical storm. Early the next morning the JTWC reported that the depression had intensified into a tropical storm and designated it as Cyclone 01B. The storm tracked towards the west-northwest due to a mid-level ridge over India. Later that morning RSMC New Delhi reported that the depression had intensified into a deep depression and reported it was expected to intensify into Cyclonic Storm Bijli. Around 1500 UTC, the RSMC New Delhi upgraded the system to a cyclonic storm and gave it the name Bijli. Partial convective banding developed around the periphery of the system as it intensified. The conditions for good outflow were present but did not develop. Around this time, the forward motion of the storm also slowed. On April 16, the storm turned towards the northeast, paralleling the eastern coast of India. Around 0600 UTC, RSMC New Delhi reported that Bijli had reached its peak intensity with winds of 75 km/h (45 mph 3-minute winds). Early on April 17, RSMC New Delhi reported that Bijli had weakened into a deep depression as it started to move the northeast.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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