1975 Pacific hurricane season

Infobox hurricane season
Basin=EPac
Year=1975
Track=1975 Pacific hurricane season map.png First storm formed=June 2, 1975
Last storm dissipated=November 7, 1975
Strongest storm name=Denise
Strongest storm pressure=934
Strongest storm winds=120
Average wind speed=1
Total depressions=21
Total storms=17
Total hurricanes=9
Total intense=4
Fatalities=30
Da

Inflated=
five seasons=1973, 1974, 1975, 1976, 1977The 1975 Pacific hurricane season officially started May 15, 1975 in the eastern Pacific, and June 1, 1975 in the central Pacific, and lasted until November 30, 1975. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeast Pacific Ocean.

The 1975 Pacific hurricane season was near average, with 17 tropical storms forming. Of these, 9 became hurricanes, and 4 became major hurricanes by reaching Category 3 or higher on the Saffir-Simpson Hurricane Scale. The only notable storms are Hurricane Olivia, which killed 30 people and left thousands homeless when it made landfall in October; and an unnamed hurricane that developed at very high latitude.

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torms

Hurricane Agatha

Infobox Hurricane Small
Basin=EPac

---

Formed=June 2
Dissipated=June 5
1-min winds=70
Prepressure=≤
Pressure=1005

Tropical Storm Bridget

Infobox Hurricane Small
Basin=EPac

---

Formed=June 28
Dissipated=July 3
1-min winds=55

Hurricane Carlotta

Infobox Hurricane Small
Basin=EPac

---

Formed=July 2
Dissipated=July 11
1-min winds=110

Hurricane Denise

Infobox Hurricane Small
Basin=EPac

---

Formed=July 5
Dissipated=July 15
1-min winds=120Denise was the most intense storm of the season, but it had no effect on land. It was the strongest July storm since the 1971 season. Denise peaked on July 9, and dissipated July 15.

Tropical Storm Eleanor

Infobox Hurricane Small
Basin=EPac

---

Formed=July 10
Dissipated=July 12
1-min winds=35A tropical depression formed on July 10 south of Mexico. It moved northwestward, and after reaching a peak convert|40|mi/h|km/h|-1|abbr=on, Tropical Storm Eleanor hit southwestern Mexico as a tropical depression. It quickly dissipated.

Tropical Storm Francene

Infobox Hurricane Small
Basin=EPac

---

Formed=July 27
Dissipated=July 30
1-min winds=45

Tropical Storm Georgette

Infobox Hurricane Small
Basin=EPac

---

Formed=August 11
Dissipated=August 14
1-min winds=40

Tropical Storm Hilary

Infobox Hurricane Small
Basin=EPac

---

Formed=August 13
Dissipated=August 17
1-min winds=50

Hurricane Ilsa

Infobox Hurricane Small
Basin=EPac

---

Formed=August 18
Dissipated=August 26
1-min winds=90On August 18, a tropical depression formed south of the Gulf of Tehuantepec. It moved westward, and after four days, Ilsa reached its peak of convert|90|mi/h|km/h|-1|abbr=on over the open Eastern Pacific. It continued west-northwestward, and was absorbed by a cold core upper level. That triggered the development of an unnamed hurricane.

Hurricane Jewel

Infobox Hurricane Small
Basin=EPac

---

Formed=August 24
Dissipated=August 31
1-min winds=65

Hurricane Katrina

Infobox Hurricane Small
Basin=EPac

---

Formed=August 29
Dissipated=September 7
1-min winds=115Hurricane Katrina was the second strongest hurricane of the season, reaching top winds of convert|135|mi/h|km/h|0|abbr=on winds on September 3 without affecting land.If you want the destructive Atlantic storm of 2005 see Hurricane Katrina.

Hurricane Twelve

Infobox Hurricane Small
Basin=EPac


Track=1975 Pacific hurricane 12 track.pngFormed=August 31
Dissipated=September 5
1-min winds=65
Pressure=990A cold core low absorbed the remnant circulation of Hurricane Ilsa on September 2. Convection increased rapidly, and by the 5th, it had enough convection to be called a tropical depression. This system was located convert|800|mi|km|-1 northeast of Honolulu, Hawaii. It moved westward, reaching tropical storm strength the next day. It began to move rapidly northeastward. An eye was evident at this time, but it was not until it reached 40° north on the 4th did it become a hurricane. On September 4, a ship reported hurricane-force winds. The storm weakened to a tropical storm on the 5th, and became extratropical that night, located less than convert|300|nmi|km|-1 southwest of Juneau, Alaska. The extratropical low moved southeastward, retaining its identity until it reached Montana, where it was absorbed by a front.

It is not known why this hurricane went unnamed. Any statement about why is purely speculative at this point. The hurricane is the furthest north a tropical cyclone existed in the Eastern Pacific, and is also the northernmost existence for a Pacific hurricane.

Hurricane Lily

Infobox Hurricane Small
Basin=EPac

---

Formed=September 16
Dissipated=September 21
1-min winds=75

Tropical Storm Monica

Infobox Hurricane Small
Basin=EPac

---

Formed=September 28
Dissipated=October 2
1-min winds=45

Tropical Storm Nanette

Infobox Hurricane Small
Basin=EPac

---

Formed=September 28
Dissipated=October 4
1-min winds=45

Hurricane Olivia

Infobox Hurricane Small
Basin=EPac

---

Formed=October 22
Dissipated=October 25
1-min winds=100Hurricane Olivia was the strongest landfall of the season. A tropical storm formed on October 22 south of Mexico. It moved northwestward initially, followed by a northeast turn. Olivia then intensified steadily. It reached Category 3 intensity and a peak of convert|115|mi/h|km/h|0|abbr=on winds just before landfall. Late on October 24, Olivia smashed ashore close to Mazatlán. Olivia was the strongest landfall since 1967.

Mazatlán was extensively damaged. Near 30000 people were left homeless as 7000 houses were totally destroyed in Mazatlán and fourteen nearby villages. Olivia was Mazatlán's worst hurricane since an unnamed Category 4 came ashore in almost exactly the same place in 1957. Hurricane Olivia killed thirty people and injured 500. Ten of the deaths and all of the injuries occurred in Mazatlán and the surrounding region. Twenty other people were killed when three shrimp boats went down in the storm. [http://ams.allenpress.com/archive/1520-0493/104/4/pdf/i1520-0493-104-4-475.pdf]

Massive evacuations were started ahead of the hurricane. A total of 50000 people were evacuated. [http://ams.allenpress.com/archive/1520-0493/104/4/pdf/i1520-0493-104-4-475.pdf]

Tropical Storm Priscilla

Infobox Hurricane Small
Basin=EPac

---

Formed=November 2
Dissipated=November 7
1-min winds=55

1975 storm names

These names were used for storms in 1975. It is the same list used in the 1971 season. This is the last time this list was used, as modern naming began in 1978.

The central Pacific used names and numbers from the west Pacific's typhoon list. No names were used, as the one storm that formed in this area went unnamed.

ee also

*List of Pacific hurricanes
*List of Pacific hurricane seasons
*1975 Atlantic hurricane season
*1975 Pacific typhoon season
*1975 North Indian Ocean cyclone season
*Southern Hemisphere tropical cyclone seasons: 1974–75, 1975–76

References

* [http://weather.unisys.com/hurricane/e_pacific/1975/index.html Unisys archive] accessed November 8, 2005
* [http://www.prh.noaa.gov/cphc/summaries/1975.php CPHC 1975 report on the Unnamed Hurricane] accessed November 8, 2005
* [http://ams.allenpress.com/pdfserv/10.1175%2F1520-0493(1976)104%3C0804:UTDFAM%3E2.0.CO%3B2 Monthly Weather Review article on the Unnamed Hurricane] accessed June 3, 2006
* [http://www.usatoday.com/weather/wmexhurr.htm USA Today: West Mexico Hurricanes] accessed November 8, 2005
* [http://ams.allenpress.com/archive/1520-0493/104/4/pdf/i1520-0493-104-4-475.pdf Monthly Weather Review] accessed April 30, 2007

External links

* [http://ams.allenpress.com/archive/1520-0493/104/4/pdf/i1520-0493-104-4-475.pdf Eastern North Pacific Tropical Cyclones of 1975]
* [http://weather.unisys.com/hurricane/e_pacific/1975/index.html Unisys Weather archive for the Eastern Pacific, 1975]