pacific hurricane season pacific hurricane season near average pacific hurricane season worst storm year tropical depression killed person mexico tropical storm injured people mexico hurricane caused flooding hawaii hurricane kevin strongest system season resulted longest lasting hurricane eastern north strongest november storm time season officially started eastern pacific june central pacific lasted november basins dates conventionally period year tropical cyclones form northeastern pacific_ocean season summary season total sixteen tropical cyclones developed featuring hurricanes tropical storms tropical depressions totals close averages established satellite surveillance began season active record hand ended late november hurricane hand months july august active ones basin produced tropical cyclones activity july systems average time unusual circulation patterns aloft tropical pacific shorter gap late august early september attributed flow patterns near baja california peninsula tropical storms hurricanes landfall tropical depressions season came ashore near mexico day june depression caused fatality season injured people missing threatened coast mexico coming close require tropical cyclone watches warnings responsible injuries system passed offshore public advisories issued systems threat heavy rain coast tropical cyclones grew specially long lived intense systems example hurricane kevin endured hurricane days east establishing new record longevity eastern pacific tropical cyclone data gathered hour intervals season intensity assessments estimates dvorak technique large research mission tropical cyclogenesis pacific research mission investigated hurricane gathered surface observations track forecasts slightly accurate past years intensity forecasts comparable previous seasons season began formation tropical depression ended dissipation tropical depression november named storm formed june july august september october november plus spelled storms tropical storm tropical depression season formed southwest baja california tropical disturbance developed vicinity panama depression gradually developed early day declared tropical storm named newly named tropical cyclone reached peak intensity mph later day maintaining peak intensity hours started gradually weaken upper level system increased dissipated life tropical cyclone moved little slowly executed cyclonic loop remaining away land tropical storm organized tropical wave northern africa entered atlantic_ocean wave showed signs organization crossing atlantic emerged eastern north pacific june june convection associated wave better organized june tropical depression formed location miles acapulco mexico hours depression moved west northwest response weakening ridge northwest june strong shear relaxed somewhat exposed center moved deep convection depression strengthened tropical storm miles south southern tip baja california tropical storm experienced limited development reaching peak mph early june center exposed weakened tropical depression june finally dissipated june colder waters miles southwest southern tip baja california casualties damages attributed tropical cyclone hurricane tropical wave left african coast june showing cyclonic low clouds passed barbados days later low mid wind shift detected wave followed low level wind surge observed june shower activity associated wave moved westward south_america panama june convection organized developed tropical depression june located miles south tropical storm day later reached minimal hurricane strength june days later briefly downgraded tropical storm status strong high pressure system forced warmer waters began regained hurricane status developed defined eye excellent upper level outflow june peaked mbar inhg central pressure mph maximum sustained winds hurricane weakened moved west colder waters encountered upper level shear dissipated june national_hurricane_center received reports impact tropical cyclone developed tropical wave moved africa atlantic june june gained organization identified area disturbed weather south mexico system immediately showed signs rotation designated tropical depression day centered miles south southeast mexico depression reached storm strength named june miles coast mexico rapidly intensified hurricane june approached coast rapidly weakened june downgraded tropical storm status moving colder waters deep convection gradually diminished west northwestward motion abruptly halted system weakened depression june near dissipated june response approach mexican government issued tropical storm warning hurricane watch june watch warning dropped day cyclone remained far away reports high winds received satellite observations indicated heavy rains fell affected areas june damages casualties reported tropical depression tropical disturbance south better organized june tropical depression strengthening limited depression approaching land landfall later day near continued west northwest track dissipated inland bringing torrential rains caused year lone fatality caused significant damage destroyed homes injured caused people missing rainfall totals high inches hours accompanied depression mexico hurricane formed westward moving tropical wave crossed atlantic june july short lived cyclonic circulation center wave detected satellite imagery system persistent deep convection occur wave neared eastern pacific_ocean july july convection concentrated nautical miles south acapulco near mid level vortex wave diminished day july better organized based reports satellite imagery low developed seasons season sixth tropical depression july depression intensified upgraded tropical storm day better organized steadily intensified early july national_hurricane_center anticipating system reach hurricane intensity continuing strengthen reached hurricane status july short period time developed eye uncertainty storm intensity day possible hurricane earlier originally estimated wind shear associated trough passage cooler waters caused begin weakening cyclone center soon exposed downgraded depression july weakening cyclone crossed central pacific july dissipated shortly remnants managed maintain weak center passed north passed near storm approached system started shortly crossing tropical storm august lasted hours lost convection cyclone began dissipate damages casualties caused hurricane tropical wave better organized developed tropical depression seven miles south southeast cabo san lucas july depression intensified quickly tropical storm day continued strengthen warm pacific water reached hurricane status july satellite imagery showed appearance eye august peaked august central pressure mbar inhg winds mph making category hurricane saffir simpson hurricane scale crossed north central august crossed wind shear increased began weaken approached tropical storm august passed rapidly weakened tropical depression later day finally dissipated august northwest remnants caused heavy rains strong winds counties hawaii flash flooding reported districts lightning injured persons hurricane significant tropical wave little deep convection left africa july crossed atlantic convection associated southern passing windward_islands july crossing central_america july signs organization evident late august wave south august tropical depression formed centered miles south southeast acapulco despite presence easterly shear depression gradually intensified center moved west northwest paralleling coast mexico reached tropical storm strength day time centered south southwest acapulco peaked august central pressure mbar inhg maximum sustained winds mph miles peak weakened tropical storm status began losing convection subsequently weakened tropical depression dissipated august damages casualties associated tropical cyclone tropical storm satellite imagery showed convective area cyclonic turning connection tropical wave africa july convection gradually diminished system moved west southwest atlantic july wave passed south trinidad low level wind shift detected couple days system passed venezuela colombia crossed august south guatemala convection organized wave strengthened tropical depression miles south southwest acapulco august system intensified tropical storm august storm reached peak intensity august estimated mph maximum winds pressure inhg tropical storm moved general west northwest track couple days turned north august influence upper level trough later day tropical storm force winds reported center located nautical miles island gradually weakened cool waters maintained large level circulation caused dissipation slower normal tropical depression dissipated august large remnant circulation continued northwards eventually passed california casualties damages attributed tropical cyclone remnants caused rain far north san_francisco tropical depression tropical disturbance southwest tropical depression september convection persistent newly formed center circulation conditions favorable development strong wind shear environment caused trough depression took northward track september south depression brought heavy showers parts mexico reported deaths damages tropical storm september tropical wave entered eastern pacific area convection developed miles west southern tip baja california peninsula trough axis extended southward low west convection september area disturbed weather included convective bands organization convection improved cloud system tropical depression day trough near depression moved cyclone north northwest period strengthened tropical storm day time influence trough tropical storm diminished track tropical storm small clockwise loop reached northernmost point loop september storm centered miles offshore near peak intensity mph intensification storm proximity land shear associated upper level low near baja california peninsula turned east forward motion slowed storm began moving south lost identity rapidly weakened depression status dissipated hours later remnants moved west southwest days closely approaching coast mexico tropical storm warning issued september forecast coast warnings extended cabo september warnings dropped cyclone dissipated caused street flooding acapulco people injured casualties damage reported rain fell large area mexico highest recorded inches san hurricane tropical wave formed tropical storm atlantic crossed panama disturbance mid late september september cloud pattern increased organization system designated tropical depression continuing strengthen depression tropical storm september tropical storm headed northwest development rapid especially september banding type eye forming rapid development took place following day maximum sustained winds increased near mph afternoon september later september reached peak maximum winds mph minimum central pressure inhg maintained powerful hurricane days moving west september turned west northwest began weaken september northwestward movement commenced september response large upper level trough developed northwest continued weaken september regained tropical storm intensity downgraded depression october dissipated tropical cyclone caused reported damage casualties hurricane kevin kevin formed westward moving tropical wave emerged northwest coast africa september wave crossed september signs development convection better organized hours september tropical depression thirteen day located miles southeast acapulco depression moved west banding pattern pronounced depression upgraded tropical storm kevin later day centered miles south southeast acapulco convective banding increased hours kevin strengthened hurricane status september miles south southwest acapulco kevin continued strengthen eye intermittently appeared september september kevin defined eye feature persisted days hurricane continued strengthen october reached peak intensity centered miles south southwest southern tip baja california estimated mph maximum winds minimum pressure mbar inhg kevin moving west time turned west southwest strong high pressure system located northwest hurricane kevin began weaken gradually eye poorly defined october weakened october hurricane began turning northwest continued general motion days defined eye reappeared system kevin intensified low end category hurricane maximum winds mph minimum pressure inhg october short lived october hurricane began weaken october entered basin category hurricane crossing subsequently downgraded storm strength day october depression dissipated tropical cyclone day remnant circulation persist longer slowly drifted north finally lose identity late october despite long life hurricane kevin caused damage casualties kevin passed north hawaii effect land increased trade winds hurricane tropical wave ultimately produced hurricane emerged northwest coast africa september tracked westward tropical atlantic convection increased markedly approaching lesser antilles september tropical wave northern portion split north caused showers jamaica bahamas cuba southern continued crossed panama september group disorganized cloud clusters took days organize october organization improved wave tropical depression fourteen tropical depression moved northwest strengthening tropical storm hours drifted north upgraded hurricane october hurricane reached estimated peak intensity mph minimum central pressure inhg day began weaken following kevin track entered colder waters turned west northwest passed nautical miles caused mph sustained winds october later day weakened tropical storm october following kevin track cyclone continued weaken downgraded depression deep convection continued intermittently appear finally early october dissipated reported casualties damages october tropical wave crossed central_america began organize day based satellite classifications weather system upgraded tropical depression status miles south october tropical storm october named reached hurricane status early october moving parallel coast mexico occasions eye apparent satellite imagery fully developed upper trough forced moved northwest north bringing hurricane waters previously cooled hurricanes kevin disorganized weakened tropical storm trough forced northward moved area turned sharply west west southwest high pressure system weakened remained tropical depression finally dissipated october october threatening prompt mexican government issue tropical storm watch acapulco warning dropped october moved away associated casualties damages tropical cyclone hurricane november area convection associated tropical wave developed tropical depression located southeast acapulco mexico day depression moved northwest intensified tropical storm named later day day storm gradually intensified temporarily moving west flow field strengthening high pressure system located north november nhc noted developed eye reporting system developed category hurricane november peaked category hurricane november large trough moved west formed low shear increased disrupted convection low caused abrupt change course northeast weakened depression november dissipated day remnants continued northeast showing brief ups convection deaths damage reported occurred association despite probable rainfall totals mexican states storm names following names named storms formed eastern pacific names assigned marked gray names retired list season list season season subsequent seasons corrected initial spelling season storms form area responsibility encompassing area degrees west international date line names series rotating lists names slated use shown retirement retired spring replaced season seasonal effects
1991 Pacific hurricane season