atlantic hurricane season atlantic hurricane season average season recent season feature tropical cyclones august typically active months season officially began june lasted november dates conventionally period year tropical cyclones form atlantic basin season inactive seven named storms forming additional tropical depression subtropical storm time season active tropical cyclones atlantic basin entire month august strong credited reducing number storms atlantic increasing number storms eastern basin storms respectively common years tropical cyclogenesis suppressed tropical latitudes tropical storms south system operationally unnoticed subtropical storm developed north bahamas june dissipated following day impact tropical storm developed offshore south_carolina june dissipated july causing minor affects north_carolina hurricane bill short lived storm lasted july july produced light rainfall newfoundland bill dissipating tropical storm developed caused rough seas north_carolina devastating storm caused extensive flooding particularly southern alabama resulted fatalities million usd damage brought rough seas gusty winds lesser antilles causing deaths million losses precursor caused minor flooding puerto_rico tropical depression tropical storms impact land collectively storms atlantic hurricane season resulted fatalities approximately million damage season summary pre season forecasts forecasts hurricane activity issued hurricane season noted hurricane experts associates normal season defined named storms reach hurricane strength major hurricanes forecast stated storms form seven reach hurricane status addition predicted seven hurricanes intensify major hurricane category rating saffir simpson hurricane scale season activity atlantic hurricane season officially began june unnamed subtropical storm developed day active hurricane season average era tropical cyclogenesis began tropical depressions formed depressions attained tropical storm status attained hurricane status tropical cyclone reach major hurricane status slightly average season landfall hurricane strength season tropical storm grace caused damage fatalities cyclones collectively caused deaths million damage storm season tropical storm grace dissipated october month official end season november atlantic hurricane season active beginning june tropical cyclones developed unnoticed subtropical storm tropical storm unusual tropical cyclones formed month july reached tropical storm intensity hurricanes despite active start months season featured record low activity especially august september combined produced tropical cyclone result active start subsequent lack activity showed early season activity entire season lone tropical cyclone period developed september october short lived tropical cyclones developed grace tropical cyclogenesis ceased grace transitioned extratropical cyclone october season activity reflected low accumulated cyclone energy ace rating ace broadly speaking measure power hurricane multiplied length time existed storms long time particularly strong hurricanes high aces ace calculated advisories tropical systems exceeding knots mph tropical storm strength officially subtropical cyclones unnamed storm excluded total figure includes periods storms subtropical phase storms unnamed subtropical storm cluster thunderstorms developed florida late trough brought northeast enhancing convection developing center circulation low pressure area formed developed subtropical depression june operationally treated frontal low post analysis suggested remained separate lifetime classified unnamed subtropical storm reached subtropical storm strength hours later moved rapidly parallel east_coast united_states convection continued wrap center despite unfavorable conditions approaching cold continued intensify late june reached peak intensity maximum sustained winds mph coast north_carolina storm turned east transitioned extratropical late june southeast massachusetts shortly remnants storm merged cold tropical storm frontal low pressure system coast south_carolina developed utc june moved slowly eastward attained tropical storm status july tropical storm slightly intensified early july attained peak intensity maximum sustained winds mph minimum central pressure mbar inhg later july trough forced northeastward region increasing vertical wind shear simultaneously began weaken moving area decreasing sea surface temperatures late july weakened tropical depression storm lost tropical characteristics transitioned extratropical cyclone early july western atlantic_ocean extratropical remnants persisted dissipating hours later minimal impact reported result rip currents coastal north_carolina rough seas rescues injury occurred addition rescues person hospitalized fatalities location hurricane bill large upper level low separated trough north puerto_rico early july convection increased july surface trough developed low pressure area formed east bahamas upper level low retreated southwest wind shear decreased region allowing convection increase organize estimated system developed tropical depression july miles southwest bermuda developing cyclone moved northeastward advance approaching cold quickly intensified tropical storm bill briefly threatened pass near bermuda result tropical storm warning issued quickly dropped impact island bill bill quickly intensified continued northeastward midday july eye feature observed satellite images suggested bill intensified hurricane status relatively high latitude bill fact intensified hurricane storm attained peak intensity maximum sustained winds mph minimum pressure mbar inhg hours hurricane status bill weakened tropical storm status july absorbed cold miles south newfoundland bill dropped light rainfall newfoundland peaking slightly inch tropical storm frontal system influenced track hurricane bill spawned non tropical low southeast united_states july low remained nearly stationary dissipated developed tropical depression july miles south southeast wilmington north_carolina depression quickly intensified tropical based reconnaissance aircraft data moved northeastward passing southeast despite presence wind shear developed banding features july storm reached peak winds mph turned eastward ahead frontal system associated thunderstorm activity sporadic relatively disorganized storm weakened tropical depression july briefly intensified tropical storm extratropical later day shortly merged cold remnants noted near azores july tropical minimal effects land severe rip currents north_carolina caused rescues person injured fatalities occurred residents coastal north_carolina disappointed remain offshore region suffering dry conditions hurricane tropical low northern gulf_of_mexico developed tropical depression july depression headed slowly east northeastward intensified tropical storm following day continued east northeastward reached hurricane strength landfall near louisiana piece land remained water lost little strength emerged gulf_of_mexico strengthened slightly making alabama low end category hurricane july remaining stationary day moved northward weakened tropical depression heading northward alabama turned east crossed centered north_carolina interacted developing trough caused intensify tropical storm shortly emerged atlantic_ocean near north_carolina virginia border july took northward turn came july turned sea absorbed july hurricane landfall strong winds confined small area portions extreme eastern louisiana reporting hurricane force winds dropped torrential amounts rain louisiana peaking flooding occurred portions state heavy rainfall floods high winds produced damaged houses businesses louisiana mississippi dropped heavy rainfall southern portion state resulting minor street house flooding crossed alabama july dropped inches rain tropical cyclone record alabama hurricane force winds reported western shores mobile bay area buildings sustained roof damage addition homes reported significant damage north south_carolina virginia spawned tornadoes caused significant damage heavy rainfall occurred isolated areas central north_carolina inches rain reported eventually affected massachusetts bring light rainfall tropical storm force winds southeastern portions state overall caused fatalities approximately million damage tropical depression tropical wave emerged atlantic_ocean west coast africa july wave moved westward tropical atlantic finally began consistent evidence cloud system center deep convection associated wave concentrated satellite images july estimated disturbance utc day centered miles east barbados tropical depression moved west northwestward started showing signs falling apart july early following day depression degenerated tropical wave observations storm fell apart suggested briefly reached tropical storm strength tropical wave continued westward lost identity july hurricane tropical wave developed tropical depression centered miles east southernmost september later day depression intensified upgraded moved west northwestward steadily intensified attain hurricane status september passed short distance north lesser antilles later turned north response approaching trough hurricane quickly strengthen reach peak winds mph september maintaining peak strength hours weakened cooler waters turned east weakened tropical storm extratropical passing near azores september hurricane produced light rainfall winds northern lesser antilles passage brought cloud ash antigua eruption rare occurrence strong waves hurricane produced beach erosion coastal flooding northern puerto_rico killed moderate wind gusts puerto_rico left thousands power hurricane resulted million damage caribbean territory united_states produced gusty winds light rain azores later duration storm brought hurricane force wind gusts rainfall azores damage reported tropical cyclone atlantic_ocean months august september occurrence hurricane season tropical storm tropical wave emerged atlantic_ocean west coast africa near september wave traveled westward minimal tropical cyclogenesis reached lesser antilles week later passing islands heavy rainfall strong winds reported eventually system developed broad area low pressure acquired low level circulation upper level wind shear resulted immediate organization crossing puerto_rico wind shear decreased low moving direction upper level winds utc october estimated system developed tropical depression seven miles north puerto_rico national_hurricane_center initiate advisories utc october depression strengthened hours forming tropical storm later october significant change intensity occurred remainder duration peaked winds mph storm began losing tropical characteristics transitioned extratropical cyclone utc october tropical storm grace extratropical low formed north hispaniola october following day attained gale force winds addition system acquiring tropical characteristics classified tropical storm grace october utc strong vertical wind shear prevented intensification grace immediately peaked maximum sustained winds mph minimum barometric pressure mbar inhg grace classified tropical cyclone held extratropical characteristics grace steadily weakened eventually degenerated extratropical low october precursor disturbance grace dropped moderate heavy rainfall puerto_rico peaking inches result flash flooding occurred island puerto_rico landslides caused damage roads bridges addition numerous rivers overflowed banks forced people seek shelter island fatality occurred damage amounted million addition extratropical system produced light moderate rainfall precipitation reached inches western sides islands storm names following names named storms formed north atlantic spring names retired season list season bill replaced bob storm named bill time names assigned marked gray season effects table storms formed atlantic hurricane season includes duration names landfall denoted bold location names damages death totals deaths additional indirect example indirect death traffic accident related storm damage deaths include totals storm extratropical wave low damage figures usd
1997 Atlantic hurricane season