1957 Pacific hurricane season
| 1957 Pacific hurricane season | |
|---|---|
Season summary map
|
|
| Seasonal boundaries | |
| First system formed | July 15, 1957 |
| Last system dissipated | December 6, 1957 |
| Strongest storm | |
| Name | Hurricane Twelve |
| • Maximum winds | 140 mph (220 km/h) (1-minute sustained) |
| Seasonal statistics | |
| Total storms | 13 |
| Hurricanes | 9 |
| Major hurricanes (Cat. 3+) |
1 |
| Total fatalities | 19 direct, 2 indirect |
| Total damage | $100,000 (1957 USD) |
| Related articles | |
| Category 1 hurricane (SSHWS) | |
  |
|
| Duration | July 15 – July 26 |
|---|---|
| Peak intensity | 85 mph (140 km/h) (1-min) 985 mbar (hPa) |
| Category 2 hurricane (SSHWS) | |
  |
|
| Duration | August 6 – August 16 |
|---|---|
| Peak intensity | 105 mph (165 km/h) (1-min) 987 mbar (hPa) |
| Category 1 hurricane (SSHWS) | |
 |
|
| Duration | August 9 – August 15 |
|---|---|
| Peak intensity | 85 mph (140 km/h) (1-min) 972 mbar (hPa) |
| Category 1 hurricane (SSHWS) | |
 |
|
| Duration | September 1 – September 9 crossed 180° |
|---|---|
| Peak intensity | 85 mph (140 km/h) (1-min) 980 mbar (hPa) |
| Tropical storm (SSHWS) | |
 |
|
| Duration | September 9 – September 11 |
|---|---|
| Peak intensity | 50 mph (85 km/h) (1-min) |
| Category 1 hurricane (SSHWS) | |
 |
|
| Duration | September 17 – September 18 |
|---|---|
| Peak intensity | 85 mph (140 km/h) (1-min) 984 mbar (hPa) |
| Tropical storm (SSHWS) | |
 |
|
| Duration | September 20 – September 23 |
|---|---|
| Peak intensity | 50 mph (85 km/h) (1-min) 991 mbar (hPa) |
| Tropical storm (SSHWS) | |
 |
|
| Duration | September 25 – September 28 |
|---|---|
| Peak intensity | 50 mph (85 km/h) (1-min) |
| Tropical storm (SSHWS) | |
 |
|
| Duration | September 26 – September 27 |
|---|---|
| Peak intensity | 50 mph (85 km/h) (1-min) 999 mbar (hPa) |
The 1957 Pacific hurricane season was a moderately active year in which 13 tropical cyclones formed. The hurricane season ran through the summer and fall months which conventionally delimit the period during which most tropical cyclones form in the northeastern Pacific Ocean. The first tropical cyclone developed on July 15. The final storm dissipated on December 6, becoming one of the few Pacific storms to exist outside of the seasonal dates. Of the season's 13 storms, five of these formed or crossed into the central Pacific.
During the season, five storms impacted land. Hurricane Twelve was the deadliest, leaving eight casualties in Mazatlán and the costliest was Hurricane Nina, causing an estimated $100,000 in losses. In addition to the damage, four people were killed by Nina in Hawaii. Hurricane Six killed seven people and Hurricane Ten killed two in Mexico.
The first hurricane of the season was identified by the National Weather Bureau in San Francisco, California on July 15. The previous day, the S.S. Garvel Park recorded sustained winds of 50 mph (85 km/h) when it was situated roughly 75 mi (120 km) south of Manzanillo, Mexico. Although listed as a Category 1 hurricane for its entire known existence by the hurricane database, the storm was not confirmed to have attained hurricane intensity until July 21. The storm took a steady westward track during the early portion of its existence in response to a strong ridge located north of Hawaii. On July 18, the National Weather Bureau discontinued advisories on the storm as no information on it was being received.
On July 21, a vessel named Cape Horn relayed information regarding the storm to the National Weather Bureau, leading to them re-issuing advisories on the storm, upgrading it to a hurricane. The following day, a reconnaissance mission from Oahu, Hawaii located the storm's 40 mi (65 km) wide eye and recorded sustained winds of 80 mph (130 km/h) and gusts up to 115 mph (185 km/h). Shortly after, the storm likely attained its peak intensity as a high-end Category 1 hurricane, with winds of 85 mph (140 km/h). Early on July 23, warning responsibility of the storm was given to the National Weather Bureau in Honolulu, Hawaii.
Upon transferring responsibility, the hurricane was given the name Kanoa, the Hawaiian name meaning "the free one". As the storm approached Hawaii, it began to weaken as convection filled the eye. The storm's track mirrored that of the shipping lane between the Panama Canal and Hawaii, leading to several ships being affected. Colder air also began to enter the circulation, leading to further weakening. By the time the system reached Hawaii, it was no more than an area of disturbed weather. The remnants of Kanoa persisted until July 26, at which time they dissipated over the Hawaiian Islands. The remnants of the storm brought beneficial rainfall to most of Hawaii, with heavy rains being reported in parts of the Big Island.
...
Wikipedia