It has no official bounds; it ran year-round in 1971, but most tropical cyclones tend to form in the northwestern Pacific Ocean between June and December.

These dates conventionally delimit the period of each year when most tropical cyclones form in the northwestern Pacific Ocean.

The scope of this article is limited to the Pacific Ocean, north of the equator and west of the International Date Line.

Tropical Storms formed in the entire west pacific basin were assigned a name by the Joint Typhoon Warning Center.

[2] During January 8, the JMA started to monitor a tropical depression that had developed, about 500 km (310 mi) to the east of Ngerulmud, Palau.

[4] Sarah's extratropical remnants were subsequently tracked as they moved north-eastwards, until it made landfall on Canada and broke up over the mountains of British Columbia during January 17.

The cyclone then rapidly intensified into a Category 5 super typhoon with 1-minute sustained winds of 280 km/h (175 mph) on May 2, with the JMA estimating a minimum central pressure of 890 mb (hPa; 26.28 inHg),[9] although the JTWC estimated a slightly higher pressure of 895 mbar (hPa; 26.43 inHg), while noting a compact eye 10 nautical miles across.

The storm began to weaken by May 4 and was last noted as producing tropical-storm force winds on May 7,[11] after which Amy was absorbed by a frontal system.

Despite the intensity of the storm, damage was relatively light, with Camp Eagle reporting some roofs blown off from 120 km/h (75 mph) winds.

[19] The strongest typhoon to strike the Philippines that year, this cyclone moved towards the region from the Marianas as a slow pace.

Gusty southwest winds impacted western portions of Visayas and Luzon, including Manila, as the cyclone passed by on the 21st.

Nadine dissipated the next day over China, after causing 28 deaths (with 25 missing) and heavy damage on Taiwan from the flooding.

[citation needed] 85 mph (137 km/h) Typhoon Olive, which developed on July 29 from the near equatorial trough, hit southwestern Japan on August 4.

An extremely small cyclone with a wind field of 150 nautical miles (280 km) across, Rose quickly strengthened, and became a typhoon later that day.

It weakened to a minimal typhoon over the mountainous terrain, but after reemerging in the South China Sea, Rose rapidly intensified, and peaked at 140 mph (230 km/h) winds on the 16th.

As it approached the coast of Hong Kong, the inflow became disrupted, but Rose still hit as a 100 mph (200 km/h) typhoon on the 16th.

The typhoon dissipated the next day, after causing 130 deaths in Hong Kong and leaving 5,600 people homeless.

It became extratropical on September 7 just east of Japan, after dropping more heavy rain causing 56 casualties from numerous landslides.

Steering currents became weak, and a northwest flow forced Faye southeastward back into the Philippines.

[6] Developing as a tropical depression on October 18 near Palau Island, Hester gradually intensified as it moved westward towards the Philippines.

[21][22] The most significant impact from Typhoon Hester was felt in South Vietnam were winds in excess of 155 km/h (100 mph) caused extensive damage to several United States Army bases.

[21] Newspaper reports indicated that 100 Vietnamese lost their lives due to the storm, including 33 following a plane crash near Quy Nhơn.

[23][24] In the wake of the storm, the South Vietnamese government provided the hardest hit areas with relief funds and supplies.