The 1951 Pacific hurricane season ran through the summer and fall of 1951. Nine tropical systems were observed during the season. __TOC__

Systems

Tropical Storm One

A tropical storm hit near

Acapulco Acapulco de Juárez (), commonly called Acapulco ( , ; ), is a city and Port of Acapulco, major seaport in the Political divisions of Mexico, state of Guerrero on the Pacific Coast of Mexico, south of Mexico City. Located on a deep, semicirc ...

early in the season in May.

Hurricane Two

A hurricane hit near

early in the season in June.

Tropical Storm Three

Three came close to land.

Tropical Storm Four

Tropical Storm Four existed from July 5 to July 6.

Tropical Storm Five

Tropical Storm Five existed from August 3 to August 10.

Tropical Storm Six

On August 24, a tropical storm was first observed south of Mexico. It paralleled the coastline, and moved northward into

Baja California Baja California, officially the Free and Sovereign State of Baja California, is a state in Mexico. It is the northwesternmost of the 32 federal entities of Mexico. Before becoming a state in 1952, the area was known as the North Territory of B ...

on the 28th. It dissipated the next day, and caused moderate flooding in southern California.

Tropical Storm Seven

Tropical Storm Seven existed from September 11 to September 15.

Hurricane Eight

Hurricane Eight existed from September 23 to September 28.

Tropical Storm Nine

The final tropical cyclone of the season existed from November 27 to November 30.

Other system

A warm-core kona storm transitioned into a

tropical cyclone A tropical cyclone is a rapidly rotating storm system with a low-pressure area, a closed low-level atmospheric circulation, strong winds, and a spiral arrangement of thunderstorms that produce heavy rain and squalls. Depending on its locat ...

at 0000 UTC on March 21, west of the Necker Island. At that time, the

Joint Typhoon Warning Center The Joint Typhoon Warning Center (JTWC) is a joint United States Navy – United States Air Force command in Pearl Harbor, Hawaii. The JTWC is responsible for the issuing of tropical cyclone warnings in the North-West Pacific Ocean, South P ...

(JTWC) began tracking the storm with winds of , or tropical depression strength. The system began traveling eastward, and later to the northeast on March 22. Then, it turned sharply southward towards

Hawaii Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only sta ...

on the same day. The system turned southwest toward the Hawaiian Islands at 0600 UTC of March 25, making its first landfall near Hauula on

Oahu Oahu (, , sometimes written Oahu) is the third-largest and most populated island of the Hawaiian Islands and of the U.S. state of Hawaii. The state capital, Honolulu, is on Oahu's southeast coast. The island of Oahu and the uninhabited Northwe ...

at 1200 UTC that day. The system weakened below tropical storm intensity as it passed through the island of Oahu. By six hours later, the system left the island and continued southward. Then, the system slowed down and curved back north toward Oahu. The system made a second landfall on Oahu near Mākaha, just past 0000 UTC on March 28. Later, the system scrapped the northwestern coast of the island. It re-entered the Pacific six hours later and turned west. The system then sped up and made its last landfall near Kealia, just past 0000 UTC on March 29. The storm moved quickly across the island, and it left the island about six hours later. The JTWC stopped tracking the system east of the island of

Nihoa Nihoa (; or ), also known as Bird Island or Moku Manu, is the tallest of ten islands and atolls in the uninhabited Northwestern Hawaiian Islands (NWHI). The island is located at the southern end of the NWHI chain, southeast of Necker ...

eighteen hours later, after it had started to move across the

Northwestern Hawaiian Islands The Northwestern Hawaiian Islands also known as the Leeward Hawaiian Islands, are a series of islands and atolls located northwest of Kauai and Niihau, Niihau in the Hawaiian Islands, Hawaiian island chain. Politically, these islands are part of ...

. The system has been considered a tropical or an

extratropical cyclone Extratropical cyclones, sometimes called mid-latitude cyclones or wave cyclones, are low-pressure areas which, along with the anticyclones of high-pressure areas, drive the weather over much of the Earth. Extratropical cyclones are capable of p ...

. The JTWC and the

American Meteorological Society The American Meteorological Society (AMS) is a scientific and professional organization in the United States promoting and disseminating information about the atmospheric, oceanic, and hydrologic sciences. Its mission is to advance the atmosph ...

(AMS) both consider the storm to be a tropical cyclone. However, the

Regional Specialized Meteorological Center A Regional Specialized Meteorological Centre (RSMC) is responsible for the distribution of information, advisories, and warnings regarding the specific program they have a part of, agreed by consensus at the World Meteorological Organization as ...

s for the eastern north Pacific, the

National Hurricane Center The National Hurricane Center (NHC) is the division of the United States' NOAA/National Weather Service responsible for tracking and predicting tropical weather systems between the IERS Reference Meridian, Prime Meridian and the 140th meridian ...

(NHC) and

Central Pacific Hurricane Center The Central Pacific Hurricane Center (CPHC) of the United States National Weather Service is the official body responsible for tracking and issuing tropical cyclone warnings, watches, advisories, discussions, and statements for the Central Pacif ...

(CPHC) do not include the system in their archives. Due to this, the system was not considered tropical or

subtropical The subtropical zones or subtropics are geographical zone, geographical and Köppen climate classification, climate zones immediately to the Northern Hemisphere, north and Southern Hemisphere, south of the tropics. Geographically part of the Ge ...

officially. On March 25, tropical storm warnings were posted for the Hawaiian Islands. Winds of were reported in Oahu as the storm came near the island. In

Honolulu Honolulu ( ; ) is the List of capitals in the United States, capital and most populous city of the U.S. state of Hawaii, located in the Pacific Ocean. It is the county seat of the Consolidated city-county, consolidated City and County of Honol ...

, of rain was reported. The system contributed to the already above-average rainfall in the Hawaiian Islands. The rainfall amount for March 1951 was nearly 200 to 700 percent above normal. The rainfall set records for that month, but they were later broken in 2006.

References

{{Tropical cyclone season, 1951