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1965 Pacific hurricane season

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1965 Pacific hurricane season
Season summary map
Seasonal boundaries
First system formedJune 4, 1965
Last system dissipatedSeptember 27, 1965
Strongest storm
NameEmily
 • Maximum winds90 mph (150 km/h)
(1-minute sustained)
 • Lowest pressure980 mbar (hPa; 28.94 inHg)
Seasonal statistics
Total depressions11
Total storms10
Hurricanes1
Major hurricanes
(Cat. 3+)		0
Total fatalities6 total
Total damage$10 million (1965 USD)
Related articles
Pacific hurricane seasons
1963, 1964, 1965, 1966, 1967

The 1965 Pacific hurricane season officially started May 15, 1965, in the eastern Pacific, and June 1, 1965, in the central Pacific, and lasted until November 30, 1965. These dates conventionally delimit the period of each year when most tropical cyclones form in the northeast Pacific Ocean. A total of ten systems were observed. The most notable storm was Tropical Storm Hazel, which killed six people in Mexico.

Systems

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Tropical Storm Hazel (1965)Saffir–Simpson Hurricane Scale

Tropical Storm Victoria

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Tropical storm (SSHWS)
 
DurationJune 4 – June 7
Peak intensity85 km/h (50 mph) (1-min);
1005 hPa (mbar)

On June 4, a tropical depression formed 585 miles (945 km) southwest of Acapulco, Mexico Early the next day, the depression system intensified into the first tropical storm of the season and was named Victoria. At that time, the storm was at its peak intensity of 50 mph (85 km/h) which it retained while moving the northwest. Early on June 7, the tropical storm weakened into a tropical depression before dissipating six hours later. [1] In all, Tropical Storm Victoria stayed at sea.

Tropical Storm Wallie

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Tropical storm (SSHWS)
 
DurationJune 17 – June 18
Peak intensity85 km/h (50 mph) (1-min);
1000 hPa (mbar)

Early on the morning of June 17, a tropical depression formed 185 miles (300 km/h) west of Puerto Angel, Mexico. The depression strengthened into Tropical Storm Wallie. Meanwhile, Wallie was at its peak intensity of 50 mph (85 km/h).[1] Wallie headed northwest and degenerated into an area of low pressure just off the Mexican coast early on June 18.[1] The remnant low made landfall in the near Zihuatanejo, Mexico early on June 18. The low dissipated later that day.[1]

Damage in Mexico from Wallie was described as the worst in eight years. Monetary damages were described was being in the "thousands", however an exact damage total is unknown. No deaths were reported due to the storm.[2]

Tropical Storm Ava

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Tropical storm (SSHWS)
 
DurationJune 29 – July 5
Peak intensity85 km/h (50 mph) (1-min);
998 hPa (mbar)

Early on June 29, a tropical storm was identified 535 miles (860 km) south of Cabo San Lucas, Mexico and named Ava. At that time, the storm was at peak intensity of 50 mph (85 km/h). However, Tropical Storm Ava weakened into a tropical depression within 24 hours. Late on June 30, the depression re-strengthened into a tropical storm and regained peak intensity. At this time, the storm took a track that went north and back south gently. On July 3, Tropical Storm Ava weakened into a tropical depression. Ava dissipated early on July 5. The tropical storm stayed at sea, and no damage was reported. [1]

Tropical Storm Bernice

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Tropical storm (SSHWS)
 
DurationJune 30 – July 8
Peak intensity85 km/h (50 mph) (1-min);
983 hPa (mbar)

On June 30, Tropical Storm Bernice formed. At this time, the system was located 275 miles (445 km) south of Puerto Angel, Mexico. For the next few days, the storm moved northeastward, while maintaining peak intensity of 50 mph (85 km/h). On July 5, Bernice stopped its northeastward motion and began to turn east, Berice dissipating on July 8,[1] without ever impacting any land masses.

Tropical Storm Claudia

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Tropical storm (SSHWS)
 
DurationAugust 7 – August 10
Peak intensity85 km/h (50 mph) (1-min);
1004 hPa (mbar)

During the afternoon of August 7, a tropical depression formed 150 miles southwest of Cabo San Lucas, Mexico. On August 8, the cyclone strengthened into Tropical Storm Claudia. At that time, Claudia was reaching its peak intensity of 50 mph (85 km/h), while also beginning to recurve to the north. The storm remained at peak intensity while re-curving until August 10 when the wind speeds decreased slightly and advisories were discontinued. [1] The storm never affected land.

Tropical Storm Doreen

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Tropical storm (SSHWS)
 
DurationAugust 21 – August 31
Peak intensity85 km/h (50 mph) (1-min);
≥975 hPa (mbar)

Late on August 19, Tropical Storm Doreen was first located with a TIROS satellite image. The next day, a ship, the San Juan Prospector reported winds of 40 knots (45 mph, 70 km/h) and a pressure of 975 mbar (hPa). At this time, Doreen was moving to the northwest as 10 knots. On August 21, Doreen altered its course to the west, but reversed back to its original heading the next day. On August 22, the ship Kyoyu Maru, which was just north of the storm's center reported winds of 60 knots (70 mph, 115 km/h). Over the next few days, the storm gently recurved northward but then slowed down and headed to the southwest. On August 30, Tropical Storm Doreen crossed the Central Pacific where it dissipated the next morning. During the course of the system, 13 ships reported winds related to Doreen, [1][3] but no damage was reported.

Hurricane Emily

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Category 1 hurricane (SSHWS)
 
DurationAugust 30 – September 6
Peak intensity90 mph (150 km/h) (1-min);
983 mbar (hPa)

On August 30, a moderate tropical storm developed. It slowing intensified, becoming the first hurricane of this season at 1200 UTC August 31. Emily began to weaken while moving northward in the Eastern Pacific. On 0000 UTC time September 3, Emily weakened into a tropical depression. It hit Baja California at the same intensity on September 6. [1] According to one source, Emily was the first potentially hazardous storm in many years to approach Southern California.[4] It approached Southern California while the SEALAB II Project was underway at La Jolla, California. There was concern that waves from Emily would move the Berkone, a support ship for SEALAB, away from the SEALAB site as the project would have to be halted.[4] Rainfall totals reach 1 in (25 mm) in isolated areas.[5]

Tropical Storm Florence

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Tropical storm (SSHWS)
 
DurationSeptember 8 – September 15
Peak intensity85 km/h (50 mph) (1-min);
1006 hPa (mbar)

Tropical Storm Florence first formed on September 8 as a tropical depression. After 24 hours, Florence intensified into a tropical storm. At that time, the cyclone peaked with 50 mph (80 km/h) winds. However, on September 11, Florence suddenly weakened. After maintaining its intensity for a while, the depression was declared dissipated. [1] Florence stayed at sea and no deaths or damage were reported.

Tropical Storm Glenda

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Tropical storm (SSHWS)
 
DurationSeptember 13 – September 22
Peak intensity85 km/h (50 mph) (1-min);
1005 hPa (mbar)

Tropical Storm Glenda formed on September 13 and maintained the same intensity of 50 mph(85 km/h) for nine days before advisories were dropped. [1]

Tropical Storm Hazel

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Tropical storm (SSHWS)
 
DurationSeptember 24 – September 27
Peak intensity85 km/h (50 mph) (1-min);
986 hPa (mbar)
Main article: Tropical Storm Hazel (1965)

Hazel developed from a northward-moving disturbance that originated southeast of Socorro Island.[6] After reaching tropical storm strength on the Saffir–Simpson hurricane scale, the cyclone turned to the east-northeast – a motion confirmed by a ship report. The storm made landfall near Mazatlán on September 26 and quickly became extratropical. [1] Thousands more were left homeless. Mazatlán's shrimp fleet, which makes up the base of the city's economy, suffered major damage, while in southern Sinaloa, 55,000 acres of cotton, corn, and sorghum were lost. At least 50 boats were damaged or sunk by the storm. The damage from the storm was estimated at $10 million (1965 USD) and possibly more, making Hazel the costliest tropical cyclone of the season.[7]

Accumulated cyclone energy (ACE) rating

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ACE (104kt²) – Source[1]
1 8.3025 Doreen 6 2.2275 Florence
2 7.4925 Glenda 7 1.8225 Victoria
3 6.2775 Bernice 8 1.8225 Claudia
4 4.96 Emily 9 1.62 Hazel
5 2.835 Ava 10 0.81 Wallie
Total: 40.17

Accumulated cyclone energy (ACE) is a measure of the activity of a hurricane season. It is calculated by squaring the windspeed of a cyclone with at least tropical storm-force winds every six hours, summing the results, and dividing that total by 104. As a tropical cyclone does not have gale-force winds until it becomes a tropical storm, tropical depressions are not included in these tables.[8]

Storm names

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Main articles: Tropical cyclone naming, History of tropical cyclone naming, and List of historical tropical cyclone names

The following names were used for tropical storms that formed in the North Pacific Ocean east of 140°W during 1965. The names came from a series of four rotating lists. Names were used one after the other without regard to year, and when the bottom of one list was reached, the next named storm received the name at the top of the next list. As the final tropical storm of the 1964 season was given the "T" name from list 2, the first two storms of the 1965 season were given the "V" and "W" names from that list ("U" being excluded). However, when it came time to assign a name to the season's third storm, instead of moving to the "A" name on list 3 ("X", "Y", and "Z" being excluded), forecasters returned the list 2 "A" name and proceeded from there.[9]

  • Victoria
  • Wallie
  • Ava
  • Bernice
  • Claudia
  • Doreen
  • Emily
  • Florence

Had any tropical storms formed in the North Pacific between 140°W and the International Date Line in 1965, their names would have been drawn from the Western Pacific typhoon naming list.[9]

Retirement

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The name Hazel was retired following the 1965 season from further use in the Eastern Pacific basin, and replaced with Heather.[9][10]

See also

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References

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  1. ^ a b c d e f g h i j k l m National Hurricane Center; Hurricane Research Division; Central Pacific Hurricane Center (April 26, 2024). "The Northeast and North Central Pacific hurricane database 1949–2023". United States National Oceanic and Atmospheric Administration's National Weather Service. Archived from the original on May 29, 2024. A guide on how to read the database is available here. Public Domain This article incorporates text from this source, which is in the public domain.
  2. ^ "Storm Rips Acapulco". The Modesto Bee. June 14, 1965. Retrieved March 21, 2011.
  3. ^ "Central Pacific Hurricane Center Report on Tropical Storm Doreen". Central Pacific Hurricane Center. Retrieved November 11, 2009.
  4. ^ a b "Pacific Hurricane Threatens Sealab Project". The Miami News. Associated Press. September 2, 1965. p. 8A. Retrieved September 14, 2023 – via Newspapers.com. Free access icon
  5. ^ Jack Williams (May 17, 2005). "California's Tropical Cyclones". USA Today. Retrieved March 25, 2010.
  6. ^ United States Weather Bureau (1965). Climatological Data – National Summary. U.S. Department of Commerce, Weather Bureau. pp. 72–73. Retrieved March 25, 2011.
  7. ^ "Death Count Now 6 In Mazatlan Storm". Tucson Daily Citizen. Associated Press. September 28, 1965. Retrieved August 31, 2022 – via Newspapers.com. Free access icon
  8. ^ "Measuring total seasonal activity: The Accumulated Cyclone Energy (ACE) index". Climate Prediction Center. Archived from the original on August 26, 2010. Retrieved January 3, 2011.
  9. ^ a b c Padgett, Gary (July 11, 2008). "Monthly Global Tropical Cyclone Summary: November 2007 First Installment". Australian Severe Weather. Retrieved February 24, 2024.
  10. ^ "Tropical Cyclone Naming History and Retired Names". Miami, Florida: National Hurricane Center. Retrieved February 24, 2024.
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