The 1990 Pacific hurricane season saw a then-record 16 hurricanes form.[1] Throughout the year, 21tropical cyclones became named storms in the eastern Pacific Ocean. Hurricane Alma formed on May12, 1990, three days before the season's official start on May15. The Central Pacific hurricane season began on June1, covering tropical cyclone formation in the region between 140°W and International Dateline. Hurricane Trudy was the last storm to dissipate, doing so on November1, nearly a month before the Pacific hurricane season officially ended on November30.[2]
Quick Facts Timeline of the 1990 Pacific hurricane season, Season boundaries ...
The season produced twenty-seven tropical depressions, of which twenty-one became named storms, and sixteen strengthened into hurricanes. Six out of the sixteen hurricanes strengthened into major hurricanes.[nb 1] Despite high levels of activity, Rachel was the only system to make landfall, bringing floods to Northwestern Mexico and the Southwestern United States.[1] Thousands were left homeless, and there were 18confirmed fatalities.[4] Additionally, the remnants of Hurricane Boris brought light showers to California. At that time, Hurricane Hernan was the strongest Pacific hurricane to have its intensity estimated via satellite imagery; this record was matched by Hurricane Trudy months later.[1] One tropical storm formed in the Central Pacific Hurricane Center's warning zone and eventually crossed the International Dateline before dissipating.[5]
This timeline includes information that was not operationally released, meaning that data from post-storm reviews by the National Hurricane Center, such as a storm that was not operationally warned upon, has been included. This timeline documents tropical cyclone formations, strengthening, weakening, landfalls, and dissipations during the season.
May
May12
1800UTC (11a.m. PDT) – Tropical Depression One-E develops from a tropical wave while located about 580mi (935km)[nb 2] south of Zihuatanejo, Guerrero.[7][8]
May13
1800UTC (11a.m. PDT) – Tropical Depression One-E strengthens into Tropical Storm Alma, becoming an off-season tropical cyclone.[7]
1800UTC (11a.m. PDT) – Hurricane Alma weakens to a tropical storm.[7]
May17
1800UTC (11a.m. PDT) – Tropical Storm Alma weakens to a tropical depression.[7]
May18
1800UTC (11a.m. PDT) – Tropical Depression Alma dissipates while centered about 1,445mi (2,325km) southwest of San Diego, California.[7]
June
June1
The 1990Central Pacific hurricane season officially begins.[2]
June2
1800UTC (11a.m. PDT) – Tropical Depression Two-E develops from a tropical wave while located about 430mi (690km) south of Acapulco, Guerrero.[9][10]
June4
0000UTC (5p.m. PDT June3) – The depression strengthens into Tropical Storm Boris.[10]
June5
0000UTC (5p.m. PDT June4) – Tropical Storm Boris strengthens into a Category1 hurricane.[10]
1200UTC (5a.m. PDT) – Hurricane Boris attains its peak intensity with maximum sustained winds of 90mph (150km/h) and a minimum pressure of 977mbar (28.9inHg).[10]
June6
1200UTC (5a.m. PDT) –Hurricane Boris weakens back into a tropical storm.[10]
June7
0600UTC (11p.m. PDT June6) – The NHC downgrades Tropical Storm Boris into a tropical depression.[10]
June8
1200UUTC (5a.m. PDT) – Tropical Depression Three-E develops from a tropical wave located about 800mi (1,300km) south of the southern tip of Baja California Sur.[11][12]
1200UTC (5a.m. PDT) – Tropical Storm Cristina reaches its peak intensity with maximum sustained winds of 65mph (100km/h) and a minimum barometric pressure of 994mbar (29.4inHg).[12]
June14
0000UTC (5p.m. PDT June13) – Tropical Storm Cristina weakens to a tropical depression.[12]
1200UTC (5a.m. PDT) – Tropical Depression Cristina dissipates about 880mi (1,420km) southwest of Guadalupe Island.[12]
June19
0000UTC (5p.m. PDT June18) – Tropical Depression Four-E develops from a tropical wave while located about 230mi (370km) south of Acapulco.[13][14]
1200UTC (5a.m. PDT) – Tropical Storm Douglas attains its peak intensity with maximum sustained winds of 65mph (100km/h) and a minimum pressure of 992mbar (29.3inHg).[14]
June23
1200UTC (5a.m. PDT) – Tropical Storm Douglas weakens to a tropical depression.[14]
June24
0000UTC (5p.m. PDT June23) – Tropical Depression Douglas dissipates about 140mi (230km) south-southeast of the southern tip of Baja California.[14]
June26
0600UTC (11p.m. PDT June25) – Tropical Depression Five-E forms about 345mi (555km) south of Acapulco.[15][16]
0600UTC (11p.m. PDT June27) –Hurricane Elida attains its peak intensity with maximum sustained winds of 80mph (130km/h) and a minimum barometric pressure of 990mbar (29inHg). Simultaneously, Elida crosses over Socorro Island.[16]
June29
1200UTC (5a.m. PDT) – Hurricane Elida weakens to a tropical storm.[16]
1200UTC (5a.m. PDT) – The NHC upgrades Tropical Storm Fausto into a Category1 hurricane.[19]
July9
0000UTC (5p.m. PDT July8) –Hurricane Fausto attains its peak intensity with maximum sustained winds of 85mph (140km/h) and a minimum barometric pressure of 979mbar (28.9inHg).[19]
July10
0000UTC (5p.m. PDT July9) – Tropical Depression Eight-E develops from a tropical wave while located about 640mi (1,030km) west-northwest of Cabo Blanco, Costa Rica.[20][21]
0600UTC (11p.m. PDT July9) – Hurricane Fausto again attains its peak intensity with winds of 85mph (140km/h) and a minimum pressure of 979mbar (28.9inHg).[19]
1800UTC (11a.m. PDT) – Hurricane Fausto weakens to a tropical storm.[19]
July11
1800UTC (11a.m. PDT) – Tropical Storm Fausto degenerates into a tropical depression.[19]
1200UTC (5a.m.PDT) – Hurricane Genevieve attains its peak intensity with maximum sustained winds of 105mph (165km/h) and a minimum barometric pressure of 970mbar (29inHg).[21]
July16
0600UTC (11p.m.PDT July15) – Hurricane Genevieve weakens back to a Category1 hurricane.[21]
July17
0000UTC (5p.m.PDT July16) – Hurricane Genevieve degenerates into a tropical storm.[21]
July18
0000UTC (5p.m.PDT July17) – Tropical Storm Genevieve weakens to a tropical depression.[21]
1800UTC (11a.m.PDT) – Tropical Depression Genevieve dissipates about 380mi (610km) southwest of Guadalupe Island.[21]
July19
1200UTC (5a.m.PDT) – Tropical Depression Nine-E develops from a tropical wave while located about 510mi (820km) southwest of Acapulco.[22][23]
July20
1200UTC (5a.m.PDT) – Tropical Depression Ten-E forms from a tropical wave while located about 395mi (635km) south of Puerto Ángel, Oaxaca.[24][25]
1800UTC (11a.m. PDT) – Tropical Storm Hernan strengthens into a Category1 hurricane.[23]
July22
0600UTC (11p.m. PDT July21) –Hurricane Hernan is upgraded into a Category2 hurricane.[23]
1200UTC (5a.m. PDT) – Hurricane Hernan intensifies into a Category3 hurricane.[23]
1800UTC (11a.m. PDT) – Hurricane Hernan strengthens into a Category4 hurricane.[23]
1800UTC (11a.m. PDT) – Tropical Storm Iselle intensifies into a Category1 hurricane.[25]
July23
1800UTC (11a.m. PDT) – Hurricane Hernan attains its peak intensity with winds of 155mph (250km/h) and a minimum pressure of 928mbar (27.4inHg).[23]
1800UTC (11a.m. PDT) –Hurricane Iselle strengthens into a Category2 hurricane.[25]
July24
0000UTC (5p.m. PDT July23) – Tropical Depression Eleven-E develops about 1445mi (2,325km) west-southwest of the southern tip of the Baja California Peninsula.[17]
1200UTC (5a.m. PDT) – Hurricane Iselle strengthens into a Category3 hurricane.[25]
July25
0600UTC (11p.m. PDT July24) – Hurricane Hernan weakens to a Category3 hurricane.[23]
1200UTC (5a.m. PDT) – Hurricane Iselle attains its peak intensity with maximum sustained winds of 120mph (195km/h) and a minimum barometric pressure of 958mbar (28.3inHg).[25]
July26
0600UTC (11p.m.PDT July25) – Tropical Depression Eleven-E dissipates about 1,590mi (2,560km) east-southeast of Hilo, Hawaii.[17]
1800UTC (11a.m.PDT) – Hurricane Hernan weakens into a Category2 hurricane.[23]
July27
0000UTC (5p.m.PDT July26) – Hurricane Hernan weakens back to a Category1 hurricane.[23]
July28
0000UTC (5p.m.PDT July27) – Hurricane Hernan weakens to a tropical storm.[23]
July30
0000UTC (5p.m.PDT July29) – Tropical Storm Hernan weakens to a tropical depression.[23]
July31
0600UTC (11p.m.PDT July30) – Tropical Depression Hernan dissipates midway between Honolulu, Hawaii and Guadalupe Island.[23]
August
August7
1800UTC (9a.m. HST) – Tropical Depression One-C develops from an area of disturbed weather while located about 695mi (1,120km) south-southeast of Ka Lae, Hawaii.[5]
1200UTC (3a.m. HST) – Tropical Storm Aka attains its peak intensity with maximum sustained winds of 65mph (100km/h), though the minimum pressure is unknown.[5]
August10
1800UTC (9a.m. HST) – Tropical Depression Two-C develops from a tropical disturbance while located about 1,030mi (1,660km) east-southeast of Hilo.[5]
August13
0000UTC (3p.m. HST August12) – Tropical Depression Two-C dissipates about 600mi (965km) south-southeast of Hilo.[5]
0000UTC (5p.m. PDT August25) –Hurricane Kenna attains its peak intensity with maximum sustained winds of 85mph (140km/h) and a minimum barometric pressure of 980mbar (29inHg).[29]
August27
0600UTC (11p.m. PDT August26) – Tropical Storm Lowell strengthens into a Category1 hurricane.[30]
August28
0000UTC (5p.m. PDT August27) – Hurricane Kenna weakens to a tropical storm.[29]
0000UTC (5p.m. PDT August27) –Hurricane Lowell attains its peak intensity with winds of 75mph (120km/h) and a minimum pressure of 986mbar (29.1inHg).[30]
1800UTC (11a.m. PDT) – Hurricane Lowell weakens to a tropical storm.[30]
August29
0600UTC (11p.m. PDT August28) – Tropical Storm Kenna weakens to a tropical depression.[29]
August30
1800UTC (11a.m. PDT) – Tropical Depression Kenna dissipates about 1,125mi (1,810km) east of Hilo.[29]
August31
1200UTC (5a.m. PDT) – Tropical Storm Lowell weakens to a tropical depression.[30]
September
September1
1800UTC (11a.m. PDT) – Tropical Depression Lowell dissipates about 1,230mi (1,980km) east of Hilo.[30]
September7
1200UTC (5a.m. PDT) – Tropical Depression Sixteen-E originates from a tropical wave while situated about 870mi (1,400km) southwest of Socorro Island.[32][33]
0600UTC (11p.m. PDT September8) – Tropical Storm Marie is upgraded into a Category1 hurricane.[33]
1800UTC (11a.m. PDT) – Tropical Depression Eighteen-E forms about 225mi (360km) southwest of Acapulco.[17]
September10
0000UTC (5p.m. PDT September9) –Hurricane Marie strengthens into a Category2 hurricane.[33]
0000UTC (5p.m. PDT September9) – Tropical Depression Seventeen-E develops from a tropical wave while located about 455mi (730km) south-southwest of Socorro Island.[34][35]
1200UTC (5a.m. PDT) – Hurricane Marie strengthens into a Category3 hurricane.[33]
0000UTC (5p.m. PDT September10) – Hurricane Marie strengthens into a Category4 hurricane.[33]
0300UTC (8p.m. PDT September10) – Hurricane Marie attains its peak intensity with winds of 140mph (220km/h) and a minimum pressure of 944mbar (27.9inHg).[33]
September12
0000UTC (5p.m. PDT September11) – Hurricane Marie weakens to a Category3 hurricane.[33]
1200UTC (5a.m.PDT) – Hurricane Marie weakens to a Category2 hurricane.[33]
1800UTC (11a.m. PDT) – Tropical Depression Eighteen-E dissipates about 30mi (50km) northwest of Clarion Island.[17]
September13
1800UTC (11a.m. PDT) – Hurricane Marie regains Category3 hurricane strength.[33]
September14
0000UTC (5p.m. PDT September13) – Tropical Storm Norbert strengthens into a Category1 hurricane.[35]
0600UTC (11p.m. PDT September14) –Hurricane Norbert attains its peak intensity with maximum sustained winds of 80mph (130km/h) and a minimum barometric pressure of 983mbar (29.0inHg).[35]
1800UTC (11a.m. PDT) – Hurricane Norbert weakens to a tropical storm.[35]
September16
1800UTC (9a.m. HST) – Hurricane Marie rapidly weakens into a Category1 hurricane.[5]
September17
0600UTC (9p.m. HST September16) – Hurricane Marie weakens back to tropical storm status.[5]
September18
0600UTC (11p.m. PDT September17) – Tropical Storm Norbert weakens to a tropical depression.[35]
September19
0000UTC (3p.m. HST September18) – Tropical Storm Marie weakens to a tropical depression.[5]
1800UTC (11a.m. PDT) – Tropical Depression Norbert dissipates about 1,165mi (1,875km) southwest of San Francisco, California.[35]
September21
0000UTC (3p.m.HST September20) – Tropical Depression Marie dies about 400mi (640km) south-southwest of Honolulu, Hawaii.[5]
September23
1200UTC (5a.m.PDT) – Tropical Depression Nineteen-E develops from an area of disturbed weather while located approximately 565mi (910km) south-southeast of Socorro Island.[36][37]
1200UTC (5a.m.PDT) – Tropical Storm Odile intensifies into a Category1 hurricane.[37]
1800UTC (11a.m.PDT) –Hurricane Odile strengthens into a Category2 hurricane.[37]
September26
0600UTC (11p.m.PDT September25) – Hurricane Odile strengthens into a Category3 hurricane.[37]
1200UTC (5a.m.PDT) – Hurricane Odile strengthens into a Category4 hurricane. Simultaneously, Odile attains its peak intensity with maximum sustained winds of 145mph (230km/h) and a minimum barometric pressure of 935mbar (27.6inHg).[37]
September27
0000UTC (5p.m.PDT September 26) – Tropical Depression Twenty-E develops from a tropical wave while centered about 235mi (380km) south of Acapulco.[38][39]
September28
0000UTC (5p.m. PDT September27) – Hurricane Odile weakens to a Category3 hurricane.[37]
0600UTC (11p.m. PDT September27) – Hurricane Odile weakens to a Category2 hurricane.[37]
1800UTC (11a.m. PDT) – Hurricane Odile weakens to a Category1 hurricane.[37]
2100UTC (2p.m. PDT) – Tropical Depression Twenty-E develops from a tropical wave located about east of 1,390mi (2,240km) Hilo, Hawaii.[40]
September29
0600UTC (11p.m. PDT September28) – Hurricane Odile weakens to a tropical storm.[37]
0600UTC (11p.m. PDT September29) – Tropical Storm Odile weakens back to a tropical depression.[37]
0600UTC (11p.m. PDT September29) – Tropical Storm Polo strengthens into a Category1 hurricane.[40] Simultaneously, Polo peaks in intensity with maximum sustained winds of 75mph (120km/h) and a minimum barometric pressure of 987mbar (29.1inHg).[40]
0000UTC (3p.m. HST September30) – Tropical Storm Polo enters the Central Pacific Hurricane Center's area of responsibility.[5]
1200UTC (3a.m. HST) – Tropical Storm Polo weakens to a tropical depression.[5]
1800UTC (9a.m. HST) – Tropical Depression Polo ceases to exist as a tropical cyclone about 820mi (1,320km) east-southeast of Hilo, Hawaii.[5]
October2
0600UTC (11p.m. PDT October1) – Tropical Depression Odile dissipates about 1,380mi (2,220km) east of Ka Lae, Hawaii.[37]
0600UTC (11p.m. PDT October1) – Tropical Storm Rachel attains its peak intensity with maximum sustained winds of 65mph (100km/h) and a minimum barometric pressure of 944mbar (27.9inHg).[39]
1200UTC (5a.m. PDT) – Tropical Storm Rachel moves over the southern tip of Baja California Sur with winds of 65mph (100km/h).[39]
1900UTC (12p.m. PDT) – Tropical Storm Rachel makes another landfall roughly midway between Los Mochis and Culiacán, Sinaloa with winds of 60mph (90km/h).[39]
October3
0000UTC (5p.m. PDT October2) – Now over land, Tropical Storm Rachel is downgraded a tropical depression.[39]
0000UTC (5p.m.PDT October 8) – Tropical Depression Twenty Two-E develops from a tropical wave while located about 300mi (485km) south of Socorro Island.[41][42]
1800UTC (11a.m. PDT) – Tropical Storm Simon attains its peak intensity with winds of 70mph (110km/h) and a minimum pressure of 990mbar (29inHg).[42]
October13
1800UTC (11a.m. PDT) – Tropical Storm Simon weakens into a tropical depression.[42]
October15
0000UTC (5p.m. PDT October14) – Tropical Depression Simon dissipates about 1,195mi (1,925km) southwest of Los Angeles, California.[42]
October16
0000UTC (5p.m.PDT October 15) – Tropical Depression Twenty Three-E formers from a tropical wave while located about 455mi (730km) south of Acapulco.[43][44]
1200UTC (5a.m.PDT) – Tropical Storm Trudy strengthens into a Category1 hurricane.[44]
October19
0000UTC (5p.m.PDT October 18) –Hurricane Trudy strengthens into a Category2 hurricane.[44]
0600UTC (11p.m.PDT October 18) – Hurricane Trudy strengthens into a Category3 hurricane.[44]
1800UTC (11a.m.PDT) – Hurricane Trudy strengthens into a Category4 hurricane.[44]
October20
1200UTC (5a.m.PDT) – Hurricane Trudy attains its peak intensity with winds of 155mph (250km/h).[44]
October21
1200UTC (5a.m.PDT) – Hurricane Trudy weakens back to a Category3 hurricane.[44]
1800UTC (11a.m.PDT) – Tropical Depression Twenty Four-E develops from an area of disturbed weather while located about 380mi (610km) south of Acapulco.[45][46]
October22
0000UTC (5p.m.PDT October21) – Hurricane Trudy weakens to a Category2 hurricane.[44]
1800UTC (11a.m.PDT) – Hurricane Trudy weakens to a Category1 hurricane.[44]
0000UTC (5p.m.PDT October24) – Hurricane Trudy re-strengthens into a Category2 hurricane.[44]
1200UTC (5a.m.PDT) – The NHC upgrades Hurricane Trudy into a Category3 hurricane for a second time.[44]
1200UTC (5a.m.PDT) – Tropical Storm Vance strengthens into a Category1 hurricane.[46]
October 26
0000UTC (5p.m.PDT October25) –Hurricane Vance intensifies into a Category2 hurricane and attains its peak intensity with winds of 100mph (155km/h).[46]
0600UTC (11p.m.PDT October25) – Hurricane Trudy re-strengthens into a Category4 hurricane.[44]
October27
0000UTC (5p.m.PDT October26) – Hurricane Vance weakens to a Category1 hurricane.[46]
1800UTC (11a.m.PDT) – Hurricane Trudy weakens to a Category3 hurricane.[47]
1800UTC (11a.m.PDT) – Hurricane Vance weakens to a tropical storm.[46]
October28
1200UTC (5a.m.PDT) – The NHC reports that Hurricane Trudy has weakened to a Category2 hurricane.[47]
October29
0000UTC (5p.m.PDT October 28) – Hurricane Trudy weakens to a Category1 hurricane.[47]
1800UTC (11a.m.PDT) – Hurricane Trudy weakens to a tropical storm.[47]
October30
0600UTC (11p.m.PDT October 29) – Tropical Storm Vance weakens back into a tropical depression.[46]
October31
1200UTC (5a.m.PDT) – Tropical Storm Trudy weakens to a tropical depression.[47]
November
November1
0000UTC (5p.m. PDT October31) – Tropical Depression Vance dissipates about 700mi (1,125km) south of Guadalupe Island.[46]
1800UTC (11a.m. PDT) – Tropical Depression Trudy dissipates about 800mi (1,285km) southwest of Guadalupe Island.[47]
November30
2359UTC (4:59p.m. PDT) – The 1990Pacific hurricane season officially ends.[2]
2010 Tropical Cyclone Advisory Archive. National Hurricane Center (Archive). National Oceanic and Atmospheric Administration. February 7, 2009. Retrieved April 16, 2013.
Robert Case (1990). Preliminary Report: Hurricane Alma(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1. Retrieved April 16, 2013.
Max Mayfield (1990). Preliminary Report: Hurricane Boris(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1. Retrieved April 16, 2013.
Max Mayfield (1990). Preliminary best track, Hurricane Boris, 2–8June 1990(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.3. Retrieved April 16, 2013.
Max Mayfield (June 22, 1990). Preliminary Report: Tropical Storm Cristina(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1. Retrieved April 16, 2013.
Harold Gerrish (1990). Preliminary Report: Tropical Storm Douglas(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1.
Miles Lawrence (1990). Preliminary Report: Hurricane Elida(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1.
David Roth (2011). CLIQR database. Weather Prediction Center (Report). College Park, Maryland: National Oceanic and Atmospheric Administration. Retrieved December 21, 2011.
Miles Lawrence (1990). Preliminary Report: Hurricane Fausto(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1.
Robert Case (August 16, 1990). Preliminary Report: Hurricane Genevieve(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1.
Harold Gerrish (1990). Preliminary Report: Hurricane Hernan(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1.
Miles Lawrence (1990). Preliminary Report: Hurricane Julio(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1.
Robert Case (1990). Preliminary Report: Hurricane Kenna(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1.
Max Mayfield (1990). Preliminary Report: Hurricane Kenna(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1.
Miles Lawrence (1990). Preliminary Report: Hurricane Odile(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1.
Max Mayfield (1990). Preliminary Report: Tropical Storm Rachel(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1.
Robert Case (1990). Preliminary Report: Hurricane Polo(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1.
Harold Gerrish (1990). Preliminary Report: Tropical Storm Simon(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1.
Miles Lawrence (1990). Preliminary Report: Hurricane Vance(GIF). National Hurricane Center (Report). Miami, Florida: National Oceanic and Atmospheric Administration. p.1.