The scope of this article is limited to the Pacific Ocean, north of the equator and west of the international date line. Storms that form east of the date line and north of the equator are called hurricanes; see 1958 Pacific hurricane season. Tropical Storms formed in the entire west pacific basin were assigned a name by the Fleet Weather Center on Guam.
At noon on December 31, a vortex was noted along the Intertropical Convergence Zone about south of Hawaii. On January 7, the relatively small tropical storm struck Jaluit Atoll within the southern Marshall Islands, killing 14 people. It rapidly intensified, and reached winds of the next day. Conditions became unfavorable, and steadily weakened to winds. Ponape was struck on January 10, where Ophelia tore off the roof of the United States Weather Bureau office. On January 11, Truk was struck. The Weather Bureau's inflation shelter was destroyed, with other buildings on site severely damaged. On the 12th, favorable conditions allowed Ophelia to reintensify, reaching a peak of on the 13th. Ophelia severely impacted Yap on January 13, removing the Weather Bureau office's sheet metal roof and damaging the inflation building, theodolite, and radio antenna. After maintaining that intensity for 18 hours, it quickly weakened as it drifted northward, and dissipated on the 17th. Typhoon Ophelia caused widespread on several islands of the Western Pacific. Ophelia also killed nine people when a USAFWB-50 crashed during a recon flightinto the storm on January 15.
JMA Tropical Storm Two
Tropical Storm 02 developed on April 29. It struck Philippines before dissipating on the following day.
Typhoon Phyllis
On May 29, Super Typhoon Phyllis attained a peak of, the strongest typhoon ever in the month of May. Phyllis remained over open waters, and dissipated on the 2nd to the southeast of Japan. Phyllis's record was surpassed by Typhoon Damrey in 2000, and later Typhoon Noul in 2015.
JMA Tropical Storm Four
Tropical Storm 04 developed in the South China Sea on May 26. It struck the Chinese province of Guangdong and Hainan, before dissipating on June 6.
Typhoon Rita
Typhoon Rita existed from June 7 to June 13.
JMA Tropical Storm Six
Tropical Storm 06 developed on June 8. It crossed the Ryukyu Islands of Japan, before dissipating on June 13.
Typhoon Tess developed in the vicinity of the Federated States of Micronesia on June 28. The storm moved generally west-northwestward and northwestward, reaching the Ryukyu Islands before dissipating on July 6.
Tropical Storm Winnie formed on July 12 to the east of Luzon. It moved northwestward, rapidly intensifying to a Category 4 typhoon within 12 hours. The typhoon weakened slightly, but rapidly strengthened to a super typhoon just before hitting eastern Taiwan on the 15th. Winnie rapidly weakened over the mountainous terrain, and after crossing the Formosa Strait Winnie hit southeastern China. It continued to weaken over land, and dissipated on the 17th. Winnie caused 31 casualties and 53 injuries in Taiwan while crossing.
Typhoon Betty existed in the South China Sea from July 13 to July 16.
Typhoon Alice
Tropical Storm Alice developed on July 14 in the open western Pacific Ocean. It moved to the northwest and attained typhoon status on the 16th. Alice rapidly intensified on the 19th to a super typhoon, and after turning to the northeast it weakened. Alice hit southeastern Japan on the 22nd, and became extratropical on the 24th near the Kamchatka Peninsula. Alice was responsible for 41 deaths and 61 injuries in Hokkaidō.
JMA Tropical Storm Fourteen
Tropical Storm Fourteen developed in the South China Sea on July 19. It struck Fujian before dissipating on July 25.
Typhoon 16 developed in the South China Sea on August 5. It struck China before dissipating on August 11.
Typhoon Elsie
Typhoon Elsie existed from August 4 to August 9.
Typhoon Flossie
On August 21, a tropical depression formed in the open ocean and moved northward. It reached tropical storm status later that day, and attained typhoon strength on the 22nd. Flossie peaked at on the 22nd, and weakened to a tropical storm just before hitting the southeastern coast of Japan on the 25th. Flossie turned to the east, and after becoming extratropical on the 26th the storm dissipated on the 27th. The storm caused 15 casualties and 39 injuries in Tokyo.
JMA Tropical Storm Eighteen
Tropical Storm 18 existed from August 25 to August 31.
Typhoon Grace
Another typhoon developed in the vicinity of the Federated States of Micronesia on August 29. The system moved northwestward and eventually strengthened into a super typhoon. Grace peaked with a minimum barometric pressure of. It later struck Zhejiang before becoming extratropical on September 5.
JMA Tropical Storm Twenty
Tropical Storm 24 existed from September 2 to September 13.
Typhoon Helen
Typhoon Helen, which formed on September 9, rapidly intensified to a super typhoon on the 14th. It moved to the northeast, and steadily weakened until hitting southeastern Japan as a typhoon on the 17th. It paralleled the Japanese coastline, and after turning northward it became extratropical on the 19th in the Sea of Okhotsk. Helen's effects caused 24 fatalities and 108 injuries.
Typhoon Ida
On September 20, Tropical Storm Ida formed in the central Western Pacific. It moved to the west, rapidly strengthening to a typhoon by the next day. On the 22nd Ida turned to the north and quickly intensified, reaching super typhoon status on the 23rd and peak winds of on the 24th. Such winds are speculative, due to the lack of satellite or quality in measurements, but Ida was likely a formidable typhoon with a record low pressure of 877 mbar. Ida weakened as it continued to the north-northeast, and made landfall on southeastern Honshū with winds of on the 26th. It became extratropical the next day, and dissipated on the 28th to the east of the country. Ida caused torrential flooding to southeastern Japan, resulting in over 1,900 mudslides. Damage along the coastline was extensive, including two small villages that were washed away completely. Nearly 500,000 were left homeless, 888 were killed, 496 were injured, and 381 were missing from the storm.
Typhoon June
Typhoon June existed from September 20 to September 22. It briefly crossed the dateline.
JMA Tropical Storm Twenty-four
Tropical Storm 24 existed from September 24 to September 29.
Typhoon Kathy
Typhoon Kathy developed just east of the Philippines on October 21. It moved across the islands and entered the South China Sea. There, the system strengthened, and subsequently dissipated on October 27.
Typhoon Lorna
Typhoon Lorna existed from October 23 to November 3.
Typhoon Marie
Typhoon Marie existed from October 26 to November 3.
Typhoon Nancy
Typhoon Nancy developed near Palau on November 21. The system strengthened into a super typhoon, peaking with a minimum barometric pressure of. Nancy dissipated on November 26.
