north indian ocean cyclone season north indian ocean cyclone season average season annual cycle tropical cyclone formation season official bounds cyclones tend form april december dates conventionally period year tropical cyclones form northern indian_ocean main seas east indian west india official basin releases unofficial advisories average tropical cyclones form season peaks november cyclones occurring included season season monitored depressions cyclonic storms strongest storm year november gay powerful systems record basin attaining estimated pressure mbar hpa inhg collectively storms responsible fatalities disastrous flooding triggered july cyclonic storm million damage storms severe cyclonic storm bob mid monsoon trough situated began showing signs cyclonic development data indicated presence weak circulation system remained disorganized following dramatic increase convection organization issued subsequently began monitoring system tropical depression hours later initially depression tracked slowly north northwest abruptly turning westward slowing weak mid level steering currents time storm gradually intensified limited northwesterly wind shear storm turned northward accelerated later day attained peak intensity winds mph shortly making landfall eastern india system quickly weakened inland noted dissipating low striking india storm brought wind gusts mph torrential rains amounting caused widespread damage hardest hit area homes destroyed people killed district left homeless communications severely disrupted broadcast stations government buildings hundreds telephone poles destroyed inland heavy rains storm triggered landslides killed people eastern india people killed left homeless storm nearby bangladesh strong winds produced storm destroyed homes villages areas devastated tornado month prior severely affected cyclone powerful tornado spawned storm destroyed homes killed people people perished injured country offshore fishermen went missing storm feared dead wake storm widespread search rescue missions took place cities flattened cyclone depression june small area low pressure developed west coast india following days convection associated low gradually organized june satellite intensity estimates reached mph subsequently issued system landfall early june overland low maintained significant convection turned westward emergence june water convection rapidly spread westward response anticyclone afghanistan early june cyclone estimated attained tropical storm status based ship report near center mph sustained winds surface pressure mbar hpa inhg later day strong wind shear stemming anticyclone displaced convection tropical storm prompting final advisory remnants system noted june dissipating cyclonic storm bob july began monitoring depression tracking west northwest system intensified cyclonic storm later day making landfall north onshore storm accelerated northwest weakened july remnants cyclone located state system noted following day moving pakistan heavy rains produced storm triggered flash flooding mudslides killed people according chief minister approximately homes destroyed storm produced torrential rainfall reaching hours bombay caused deadly flash flooding mudslides railway tracks metropolitan bombay left underwater city forcing businesses close days city stock exchange remained open sparse trading observed flood waters isolated villages region prompting deployment rescue missions people killed took place district unknown number people killed bridge collapsed train carriages additionally reported missing district according local police offshore fishermen went missing connection storm believed died flooding rains extended pakistan july flash floods outside killed people washed away estimated people left homeless city communication transportation reportedly paralyzed widespread power outages north killed storm country people killed november tropical depression later named gay developed favorable atmospheric conditions allowed system undergo rapid intensification november gay intensified category equivalent typhoon striking thailand crossing approximately hours system emerged category equivalent cyclone assumed west northwesterly track india days storm gradually reorganized reaching small area favorable significant intensification late november hours making landfall india gay attained peak intensity category equivalent cyclone winds estimated mph additionally estimated storm minute sustained winds mph classifying gay modern day super cyclonic storm powerful storm soon landfall near india rapidly weakening onshore system eventually dissipated november thailand storm caused extensive damage onshore killing people inflicting approximately billion million damage striking india powerful cyclone gay damaged destroyed homes leaving people homeless country deaths million million damage attributed gay storms addition storms listed monitored depressions year june formed northern landfall india june formed northern landfall india august formed landfall india october formed landfall near india bangladesh border bangladesh heavy rains high winds estimated mph caused significant damage people injured homes damaged destroyed mainly following storm dispatched medical teams relief materials affected regions november brief depression formed dissipating north sri_lanka day november slow moving depression formed northeast sri_lanka general area days dissipating
1989 North Indian Ocean cyclone season