1957 Pacific hurricane season
Encyclopedia
The 1957 Pacific hurricane season was a moderately active year in which 13 tropical cyclone
Tropical cyclone
A tropical cyclone is a storm system characterized by a large low-pressure center and numerous thunderstorms that produce strong winds and heavy rain. Tropical cyclones strengthen when water evaporated from the ocean is released as the saturated air rises, resulting in condensation of water vapor...

s 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
Pacific Ocean
The Pacific Ocean is the largest of the Earth's oceanic divisions. It extends from the Arctic in the north to the Southern Ocean in the south, bounded by Asia and Australia in the west, and the Americas in the east.At 165.2 million square kilometres in area, this largest division of the World...

. 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.

Hurricane Kanoa

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
Manzanillo, Colima
The name Manzanillo refers to the city as well as its surrounding municipality in the Mexican state of Colima. The city, located on the Pacific Ocean, contains Mexico's busiest port. Manzanillo was the third port created by the Spanish in the Pacific during the New Spain period...

. Although listed as a Category 1 hurricane for its entire known existence by the Atlantic hurricane database
HURDAT
The North Atlantic hurricane database, or HURDAT, is the database for all tropical cyclones in the Atlantic Ocean, Gulf of Mexico and Caribbean Sea, since 1851.-History:...

, 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
Ridge (meteorology)
A ridge is an elongated region of relatively high atmospheric pressure, the opposite of a trough....

 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
Eye (cyclone)
The eye is a region of mostly calm weather found at the center of strong tropical cyclones. The eye of a storm is a roughly circular area and typically 30–65 km in diameter. It is surrounded by the eyewall, a ring of towering thunderstorms where the second most severe weather of a cyclone...

 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
Atmospheric convection
Atmospheric convection is the result of a parcel-environment instability, or temperature difference, layer in the atmosphere. Different lapse rates within dry and moist air lead to instability. Mixing of air during the day which expands the height of the planetary boundary layer leads to...

 filled the eye. The storm's track mirrored that of the shipping lane between the Panama Canal
Panama Canal
The Panama Canal is a ship canal in Panama that joins the Atlantic Ocean and the Pacific Ocean and is a key conduit for international maritime trade. Built from 1904 to 1914, the canal has seen annual traffic rise from about 1,000 ships early on to 14,702 vessels measuring a total of 309.6...

 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
Hawaii (island)
The Island of Hawaii, also called the Big Island or Hawaii Island , is a volcanic island in the North Pacific Ocean...

.

Hurricane Two

Roughly two weeks after Kanoa dissipated, the season's second hurricane was identified over the open waters of the eastern Pacific on August 6. This storm traveled in a similar fashion to Kanoa in response to a high pressure system over the northern Pacific. By August 9, the system turned northwest and weakened. Cold, dry air began to enter the storm as it accelerated over cooler waters. Several reconnaissance missions were flown into the storm due to rapid changes in the storm's wind field and structure. Late on August 10, the system intensified into a Category 1 hurricane and its forward motion slowed as it turned more westward.

Although at an unusual latitude, the storm maintained this intensity for over a day before weakening to a tropical storm. During the afternoon of August 13, the small system re-intensified into a hurricane. Reconnaissance reported that gale-force winds extended no more than 100 mi (155 km) from the storm's eye. Shortly thereafter, the system further intensified into a Category 2 hurricane, attaining maximum winds of 105 mph (160 km/h). Weather maps at the time depicted the storm as having a minimum pressure of 987 mbar (hPa). By August 14, the storm began to weaken once more, gradually becoming a tropical storm on August 15. After tunrning northward, the cyclone became extratropical at a high latitude of 39.8°N.

Hurricane Three

As Hurricane Two intensified over open waters, the season's third storm was identified on August 9. Initially tracking westward, the hurricane turned sharply north, maintaining an intensity of 85 mph (140 km/h) during its known existence. Briefly slowing on August 11, the system quickly picked up forward speed as it turned northwestward, paralleling the coastline of the Baja California Peninsula
Baja California Peninsula
The Baja California peninsula , is a peninsula in northwestern Mexico. Its land mass separates the Pacific Ocean from the Gulf of California. The Peninsula extends from Mexicali, Baja California in the north to Cabo San Lucas, Baja California Sur in the south.The total area of the Baja California...

. On August 14, the hurricane turned north once more; however, it lost its identity the following day off the coast of Baja California
Baja California
Baja California officially Estado Libre y Soberano de Baja California is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is both the northernmost and westernmost state of Mexico. Before becoming a state in 1953, the area was known as the North...

.

Hurricane Della

Hurricane Della was first identified on September 1 southeast of Hawaii as a tropical depression. The depression quickly intensified into a tropical storm as it traveled northwest; however, operational advisories were not issued until September 3. By that time, a ship reported they had encountered a storm and recorded winds of 100 mph (155 km/h). Radar
Weather radar
Weather radar, also called weather surveillance radar and Doppler weather radar, is a type of radar used to locate precipitation, calculate its motion, estimate its type . Modern weather radars are mostly pulse-Doppler radars, capable of detecting the motion of rain droplets in addition to the...

 images also depicted an eye had developed within the storm. After becoming a hurricane, Della began a gradual turn towards the southwest. During the day on September 4, the storm passed roughly 10 mi (15 km) south of the French Frigate Shoals
French Frigate Shoals
The French Frigate Shoals is the largest atoll in the Northwestern Hawaiian Islands. Its name commemorates French explorer Jean-François de La Pérouse, who nearly lost two frigates when attempting to navigate the shoals...

, bringing strong winds gusting up to 110 mph (175 km/h). During the storm's passage, a pressure of 980 mbar (hPa) was recorded, the lowest in relation to the storm. By September 9, Della began to turn westward as it approached the International Date Line
International Date Line
The International Date Line is a generally north-south imaginary line on the surface of the Earth, passing through the middle of the Pacific Ocean, that designates the place where each calendar day begins...

 with winds of 85 mph (140 km/h).

During the day, the storm crossed 180°, entering the western Pacific basin and being re-designated as a typhoon. The storm tracked steadily northwestward, attaining a peak intensity of 125 mph (205 km/h), a high-end Category 3 storm, before turning back towards the east. The storm gradually weakened, transitioning into an extratropical cyclone
Extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are a group of cyclones defined as synoptic scale low pressure weather systems that occur in the middle latitudes of the Earth having neither tropical nor polar characteristics, and are connected with fronts and...

 on September 17 and again crossing the International Date Line. The system dissipated shortly thereafter over open waters. Throughout its existence, Hurricane/Typhoon Della traveled roughly 5000 mi (8,046.7 km), the longest known track of any Pacific hurricane at the time.

Tropical Storm Five

The fifth tropical cyclone of the season was first identified as a tropical storm several hundred miles southeast of Hawaii on September 9. The storm quickly attained winds of 50 mph (85 km/h) before weakening. By September 11, the system weakened to a tropical depression. Later that day, the system entered an area with no ships available for reporting. However, no ships reported a storm in the region for several days, signifying the depression's dissipation.

Hurricane Six

On September 17, a new hurricane was identified just off the southern coast of Mexico with winds of 85 mph (140 km/h). Moving northwestward, the storm eventually made landfall near Acapulco
Acapulco
Acapulco is a city, municipality and major sea port in the state of Guerrero on the Pacific coast of Mexico, southwest from Mexico City. Acapulco is located on a deep, semi-circular bay and has been a port since the early colonial period of Mexico’s history...

, Mexico at this intensity. Shortly after moving over land, the storm lost its identity.

High winds and heavy rains from the storm caused moderate damage to structures and vessels throughout Acapulco, Mexico. Several roads were washed out or flooded by the storm. Seven people were killed throughout the region by the storm, including one U.S. citizen who was electrocuted by a downed power line.

Tropical Storm Seven

Several days after Hurricane Six lost its identity over Mexico, a new tropical storm formed near the southern edge of the Gulf of California
Gulf of California
The Gulf of California is a body of water that separates the Baja California Peninsula from the Mexican mainland...

 on September 20. Some forecasters stated that the system may have been the remnants of the preceding storm which regenerated. However, the Hurricane Database did not confirm this. The system tracked nearly due north, attaining maximum winds of 50 mph (85 km/h), nearing the coastline of Mexico several times. However, the storm did not make landfall during its existence. On September 22, it turned westward before dissipating just off the coast of Baja California Sur.

Tropical Storm Eight

The fifth tropical cyclone to form or enter the central Pacific was first identified on September 25 several hundred miles south of the Hawaiian Islands. Traveling nearly due west, the storm attained an intensity of 50 mph (85 km/h) before weakening. By September 27, the storm weakened to a tropical depression and later dissipated on September 28 over open waters.

Tropical Storm Nine

The shortest lived storm of the season, Tropical Storm Nine, formed south of Mexico on September 26. The system attained peak winds of 50 mph (85 km/h) during its existence. Later that day, the center of the storm relocated several dozen miles to the west. Shortly thereafter, the storm dissipated on September 27 over open waters.

Hurricane Ten

The tenth known storm of the season was identified on October 1 several hundred miles southwest of the tip of the Baja California Peninsula. Maximum winds observed during the storm's existence reached 85 mph (140 km/h); however, no air pressure was recorded. Initially tracking westward, the system turned northwest and later northeast by October 3. After a brief acceleration on October 4, the hurricane slowed as it neared the coastline of Baja California. Early on October 5, the storm crossed the Peninsula as a Category 1 hurricane before entering the Gulf of California. The hurricane made another landfall near Navojoa, Mexico later that day. Rapid weakening took place as the storm moved over the high terrain over northern Mexico. Early on October 6, the system transitioned into an extratropical cyclone
Extratropical cyclone
Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are a group of cyclones defined as synoptic scale low pressure weather systems that occur in the middle latitudes of the Earth having neither tropical nor polar characteristics, and are connected with fronts and...

 over New Mexico
New Mexico
New Mexico is a state located in the southwest and western regions of the United States. New Mexico is also usually considered one of the Mountain States. With a population density of 16 per square mile, New Mexico is the sixth-most sparsely inhabited U.S...

 before dissipating several hours later.

At least two people were killed after their home collapsed on them a result of the storm in Mexico. Severe cotton crop damage was reported in the Mexican states of Sonora
Sonora
Sonora officially Estado Libre y Soberano de Sonora is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided into 72 municipalities; the capital city is Hermosillo....

 and Baja California Sur
Baja California Sur
Baja California Sur , is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. Before becoming a state on October 8, 1974, the area was known as the South Territory of Baja California. It has an area of , or 3.57% of the land mass of Mexico and comprises...

 and bridges were washed away by flood waters.

Hurricane Eleven

The season's eleven known storm identified several hundred miles south of Mexico on October 17. Quickly tracking northwestward, the storm attained an intensity of 85 mph (140 km/h) during its existence. Early on October 19, the hurricane turned due north, brushing the coastline of Mexico before dissipating just offshore the following day.

Hurricane Twelve

The strongest storm of the season, Hurricane Twelve, was first identified as a tropical depression several hundred miles southwest of Sonora
Sonora
Sonora officially Estado Libre y Soberano de Sonora is one of the 31 states which, with the Federal District, comprise the 32 Federal Entities of Mexico. It is divided into 72 municipalities; the capital city is Hermosillo....

, Mexico on October 20. Tracking northeastward, the system gradually intensified into a tropical storm. Late on October 21, the storm underwent a brief period of explosive intensification
Rapid deepening
Rapid deepening, also known as rapid intensification, is a meteorological condition that occurs when the minimum sea-level atmospheric pressure of a tropical cyclone decreases drastically in a short period of time. The National Weather Service describes rapid deepening as a decrease of...

, strengthening from a 50 mph (85 km/h) tropical storm to a 140 mph (220 km/h) Category 4 hurricane in roughly six hours. The hurricane maintained this intensity for a further six hours before making landfall near Mazatlán
Mazatlán
Mazatlán is a city in the Mexican state of Sinaloa; the surrounding municipio for which the city serves as the municipal seat is Mazatlán Municipality. It is located at on the Pacific coast, across from the southernmost tip of the Baja California peninsula.Mazatlán is a Nahuatl word meaning...

. Rapid weakening took place as the hurricane moved inland, with the system dissipating during the afternoon of October 22.

Throughout the affected region, eight people were killed by the storm. Extensive property damage was reported in the region, including the complete collapse of the local baseball stadium. Power lines and telegraph wires were downed throughout the region and high winds reportedly tossed vehicles into buildings. Many shrimp trawlers sank in the storm, leaving substantial losses in Mexico's shrimping industry.

Hurricane Nina

The last storm of the 1957 season, Hurricane Nina, was an unusually late-forming system. It was first identified on November 29 as a tropical storm to the southwest of Hawaii. Steadily tracking north-northeast, the storm intensified into a Category 1 hurricane, by which time it was given the name Nina. As it approached Hawaii, the National Weather Bureau issued warnings for the storm, advising residents to take precaution and possibly evacuate. However, the storm turned westward before moving over the Hawaiian Islands with winds of 85 mph (140 km/h). Gradual weakening took place as the storm continued to move over open waters. Nina eventually dissipated after turning south on December 6.

Waves up to 35 ft (10.7 m) damaged up to 50 homes across Hawaii and roughly 12 of them being destroyed on Kauai
Kauai
Kauai or Kauai, known as Tauai in the ancient Kaua'i dialect, is geologically the oldest of the main Hawaiian Islands. With an area of , it is the fourth largest of the main islands in the Hawaiian archipelago, and the 21st largest island in the United States. Known also as the "Garden Isle",...

 alone. One person was killed on land after being electrocuted by a downed power line. Offshore, a sampan
Sampan
A sampan is a relatively flat bottomed Chinese wooden boat from long. Some sampans include a small shelter on board, and may be used as a permanent habitation on inland waters. Sampans are generally used for transportation in coastal areas or rivers, and are often used as traditional fishing boats...

 called the Setsu Maru sent a distress call reporting that the boat was sinking 10 miles east of Niihau
Niihau
Niihau or Niihau is the seventh largest of the inhabited Hawaiian Islands in the U.S. state of Hawaii, having an area of . Niihau lies southwest of Kauai across the Kaulakahi Channel. Several intermittent playa lakes provide wetland habitats for the Hawaiian Coot, the Black-winged Stilt, and the...

. All three people aboard the boat were reported dead as a result. In all, damage from the hurricane was estimated at $100,000.

Storm names

During 1957, hurricanes that formed east of 140°W were not given names by the local warning center. Those that either crossed or formed west of that point were named by the National Weather Bureau in Honolulu, Hawaii
Honolulu, Hawaii
Honolulu is the capital and the most populous city of the U.S. state of Hawaii. Honolulu is the southernmost major U.S. city. Although the name "Honolulu" refers to the urban area on the southeastern shore of the island of Oahu, the city and county government are consolidated as the City and...

. These names were taken from the names used for Pacific typhoon
Pacific typhoon
A typhoon is a mature tropical cyclone that develops in the northwestern part of the Pacific Ocean between 180° and 100°E. This region is referred to as the northwest Pacific basin. For organizational purposes, the northern Pacific Ocean is divided into three regions: the eastern , central , and...

s. Three names were used in 1957, they were Kanoa, Della and Nina. Due to the lack of major damage from these storms, their names were not retired. However, once the Central Pacific adopted its own naming scheme, these names were no longer used.

Season effects

This is a table of the storms in 1957 and their landfall(s)
Landfall (meteorology)
Landfall is the event of a tropical cyclone or a waterspout coming onto land after being over water. When a waterspout makes landfall it is reclassified as a tornado, which can then cause damage inland...

, if any; the table does not include storms that did not make landfall, which is defined as the center of the storm moving over a landmass. Deaths in parentheses are additional and indirect (an example of an indirect death would be a traffic accident), but are still storm-related. Damage and deaths include totals while the storm was extratropical or a wave or low.

See also

  • List of Pacific hurricane seasons
  • 1957 Atlantic hurricane season
    1957 Atlantic hurricane season
    The 1957 Atlantic hurricane season officially began on June 15, 1957, and lasted until November 15, 1957. These dates conventionally delimit the period of each year when most tropical cyclones form in the Atlantic basin. The season was below average, with eight total storms and just three...

  • 1957 Pacific typhoon season
    1957 Pacific typhoon season
    The 1957 Pacific typhoon season has no official bounds; it ran year-round in 1957, but most tropical cyclones tend to form in the northwestern Pacific Ocean between June and December...


External links

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