1958 Pacific typhoon season

Typhoon (JMA)
Category 5 super typhoon (SSHWS)
Duration	January 6 – January 17
Peak intensity	260 km/h (160 mph) (1-min)  940 hPa (mbar)

At noon on December 31, a vortex was noted along the Intertropical Convergence Zone about 1,300 miles (2,100 km) 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 140 miles per hour (230 km/h) the next day. Conditions became unfavorable, and steadily weakened to 105 miles per hour (169 km/h) 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 160 miles per hour (260 km/h) 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.[1] 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.[2] Ophelia also killed nine people when a USAF WB-50 crashed during a recon flight into the storm on January 15.[3]

Tropical storm (JMA)
Tropical storm (SSHWS)
Duration	April 29 – April 30
Peak intensity	95 km/h (60 mph) (1-min)  995 hPa (mbar)

Tropical Storm 02 developed on April 29. It struck Philippines before dissipating on the following day.

Typhoon (JMA)
Category 5 super typhoon (SSHWS)
Duration	May 23 – June 2
Peak intensity	295 km/h (185 mph) (1-min)  940 hPa (mbar)

On May 29, Super Typhoon Phyllis attained a peak of 185 miles per hour (298 km/h), 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.

Tropical storm (JMA)
Tropical storm (SSHWS)
Duration	May 26 – June 6
Peak intensity	90 km/h (55 mph) (1-min)  990 hPa (mbar)

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 (JMA)
Category 1 typhoon (SSHWS)
Duration	June 7 – June 13
Peak intensity	140 km/h (85 mph) (1-min)  985 hPa (mbar)

Typhoon Rita existed from June 7 to June 13.

Tropical storm (JMA)
Tropical storm (SSHWS)
Duration	June 8 – June 13
Peak intensity	70 km/h (45 mph) (1-min)  998 hPa (mbar)

Tropical Storm 06 developed on June 8. It crossed the Ryukyu Islands of Japan, before dissipating on June 13.

Typhoon (JMA)
Category 3 typhoon (SSHWS)
Duration	June 13 – June 17
Peak intensity	185 km/h (115 mph) (1-min)  985 hPa (mbar)

Typhoon Susan existed from June 13 to June 17.

Typhoon (JMA)
Category 1 typhoon (SSHWS)
Duration	June 28 – July 6
Peak intensity	140 km/h (85 mph) (1-min)  1000 hPa (mbar)

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.

Typhoon (JMA)
Category 3 typhoon (SSHWS)
Duration	July 8 – July 14
Peak intensity	185 km/h (115 mph) (1-min)  965 hPa (mbar)

Typhoon Viola existed from July 8 to July 14.

Typhoon (JMA)
Category 5 super typhoon (SSHWS)
Duration	July 11 – July 17
Peak intensity	280 km/h (175 mph) (1-min)  925 hPa (mbar)

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 175-mile-per-hour (282 km/h) 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.[4] Winnie caused 31 casualties and 53 injuries in Taiwan while crossing.[5]

Typhoon (JMA)
Tropical storm (SSHWS)
Duration	July 13 – July 16
Peak intensity	110 km/h (70 mph) (1-min)  985 hPa (mbar)

Typhoon Betty existed in the South China Sea from July 13 to July 16.

Typhoon (JMA)
Category 4 super typhoon (SSHWS)
Duration	July 13 – July 24
Peak intensity	240 km/h (150 mph) (1-min)  925 hPa (mbar)

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 150-mile-per-hour (240 km/h) 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.[4] Alice was responsible for 41 deaths (with 8 missing) and 61 injuries in Hokkaidō.[5]

Tropical storm (JMA)
Tropical storm (SSHWS)
Duration	July 19 – July 25
Peak intensity	95 km/h (60 mph) (1-min)  992 hPa (mbar)

Tropical Storm Fourteen developed in the South China Sea on July 19. It struck Fujian before dissipating on July 25.

Typhoon (JMA)
Category 4 super typhoon (SSHWS)
Duration	July 22 – July 29
Peak intensity	240 km/h (150 mph) (1-min)  935 hPa (mbar)

Typhoon Doris existed from July 22 to July 29.

Tropical storm (JMA)
Category 1 typhoon (SSHWS)
Duration	August 5 – August 11
Peak intensity	145 km/h (90 mph) (1-min)  995 hPa (mbar)

Typhoon 16 developed in the South China Sea on August 5. It struck China before dissipating on August 11.

Typhoon (JMA)
Category 1 typhoon (SSHWS)
Duration	August 4 – August 9
Peak intensity	140 km/h (85 mph) (1-min)  965 hPa (mbar)

Typhoon Elsie existed from August 4 to August 9.

Typhoon (JMA)
Category 2 typhoon (SSHWS)
Duration	August 21 – August 26
Peak intensity	165 km/h (105 mph) (1-min)  970 hPa (mbar)

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 105 miles per hour (169 km/h) on the 22nd, and weakened to a 70-mile-per-hour (110 km/h) 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.[4] The storm caused 15 casualties (with 30 missing) and 39 injuries in Tokyo.[5]

Tropical storm (JMA)
Tropical storm (SSHWS)
Duration	August 25 – August 31
Peak intensity	105 km/h (65 mph) (1-min)  994 hPa (mbar)

Tropical Storm 18 existed from August 25 to August 31.

Typhoon (JMA)
Category 5 super typhoon (SSHWS)
Duration	August 27 – September 10
Peak intensity	305 km/h (190 mph) (1-min)  905 hPa (mbar)

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 905 mbar (26.7 inHg). It later struck Zhejiang before becoming extratropical on September 5.

Tropical storm (JMA)
Tropical storm (SSHWS)
Duration	September 2 – September 13
Peak intensity	105 km/h (65 mph) (1-min)  986 hPa (mbar)

Tropical Storm 24 existed from September 2 to September 13.

Typhoon (JMA)
Category 5 super typhoon (SSHWS)
Duration	September 9 – September 20
Peak intensity	280 km/h (175 mph) (1-min)  920 hPa (mbar)

Typhoon Helen, which formed on September 9, rapidly intensified to a 175-mile-per-hour (282 km/h) super typhoon on the 14th. It moved to the northeast, and steadily weakened until hitting southeastern Japan as a 105-mile-per-hour (169 km/h) typhoon on the 17th. It paralleled the Japanese coastline, and after turning northward it became extratropical on the 19th in the Sea of Okhotsk.[4] Helen's effects caused 24 fatalities (with 44 missing) and 108 injuries.[5]

Typhoon (JMA)
Category 5 super typhoon (SSHWS)
Duration	September 20 – September 27
Peak intensity	325 km/h (200 mph) (1-min)  877 hPa (mbar)

On September 20, Tropical Storm Ida formed in the central Western Pacific. It moved to the west, rapidly strengthening to a 115-mile-per-hour (185 km/h) 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 200 miles per hour (320 km/h) 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 (at the time) of 877 mbar.[6] Ida weakened as it continued to the north-northeast, and made landfall on southeastern Honshū with winds of 80 miles per hour (130 km/h) on the 26th. It became extratropical the next day, and dissipated on the 28th to the east of the country.[4] 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,[7] 888 were killed, 496 were injured, and 381 were missing from the storm.[8]

Typhoon (JMA)
Category 1 typhoon (SSHWS)
Duration	September 20 – September 22
Peak intensity	120 km/h (75 mph) (1-min)  990 hPa (mbar)

Typhoon June existed from September 20 to September 22. It briefly crossed the dateline.

Tropical storm (JMA)
Tropical storm (SSHWS)
Duration	September 24 – September 29
Peak intensity	70 km/h (45 mph) (1-min)  1000 hPa (mbar)

Tropical Storm 24 existed from September 24 to September 29.

Typhoon (JMA)
Category 3 typhoon (SSHWS)
Duration	October 21 – October 27
Peak intensity	185 km/h (115 mph) (1-min)  975 hPa (mbar)

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 (JMA)
Category 3 typhoon (SSHWS)
Duration	October 23 – November 3
Peak intensity	205 km/h (125 mph) (1-min)  940 hPa (mbar)

Typhoon Lorna existed from October 23 to November 3.

Typhoon (JMA)
Category 4 typhoon (SSHWS)
Duration	October 26 – November 3
Peak intensity	220 km/h (140 mph) (1-min)  940 hPa (mbar)

Typhoon Marie existed from October 26 to November 3.

Typhoon (JMA)
Category 5 super typhoon (SSHWS)
Duration	November 21 – November 26
Peak intensity	260 km/h (160 mph) (1-min)  920 hPa (mbar)

Typhoon Nancy developed near Palau on November 21. The system strengthened into a super typhoon, peaking with a minimum barometric pressure of 920 mbar (27 inHg). Nancy dissipated on November 26.

Tropical storm (JMA)
Tropical storm (SSHWS)
Duration	November 30 – December 4
Peak intensity	85 km/h (50 mph) (1-min)  1000 hPa (mbar)

Tropical Storm Pamela existed from November 30 to December 4.

Typhoon (JMA)
Category 4 typhoon (SSHWS)
Duration	December 2 – December 8
Peak intensity	230 km/h (145 mph) (1-min)  950 hPa (mbar)

Typhoon Olga existed from December 2 to December 8.

Tropical storm (JMA)
Category 1 typhoon (SSHWS)
Duration	December 9 – December 12
Peak intensity	125 km/h (80 mph) (1-min)  985 hPa (mbar)

Typhoon 31 existed from December 9 to December 12.