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.

An area of disturbed weather in the Philippine Sea moved westward and organized into a tropical depression on April 22.

As it accelerated over open waters, the system brushed the islands of Iwo Jima and Chichi-jima before transitioning into an extratropical cyclone on June 1.

These rains, amounting to 406 mm (16 in) in the suburbs of Manila,[3] triggered destructive floods that left some areas under 4.6 m (15 ft) of water.

[6] A trough of low pressure spawned a tropical depression in the South China Sea on June 3 and moved slowly westward.

Favorable conditions allowed it to quickly strengthen into Tropical Storm Mary, and after turning northward it attained typhoon status on the 7th.

Mary continued to intensify to a 90 mph (140 km/h) typhoon just before making landfall 20 miles (32 km) west of Hong Kong on the 8th.

Its 14.12 inches (359 mm) of rain, mudslides, and strong winds caused extreme damage across Hong Kong and southern China, leaving over 100 dead and over 18,000 homeless.

[7] In addition to its impact in Hong Kong, Mary brought heavy rains and flooding in Taiwan, especially in the capital city of Taipei.

It entered nearly ideal conditions as it moved to the west-northwest, and, just 42 hours after forming, reached peak intensity of 145 mph (233 km/h).

Due to lack of inflow from the archipelago to its west, Olive weakened to a 125 mph (201 km/h) typhoon at the time of its eastern Philippine landfall.

During rescue attempts, many coastal defense force ships were either sunk or ran aground due to 7.3 m (24 ft) swell produced by Olive.

[8] China and Hong Kong received heavy rainfall from Olive, causing moderate crop damage, though there were no reported casualties there.

Moving to the northwest, it encountered favorable conditions for development, and rapidly intensified to a 155 mph (249 km/h) super typhoon just 48 hours after forming, with an eyewall only 7 miles (11 km) wide.

Shirley continued to the northwest, and struck northeastern Taiwan as a slightly weaker 140 mph (230 km/h) typhoon on the July 31.

The mountainous terrain ripped apart the typhoon's circulation, and after crossing the Taiwan Strait, it made landfall on southeastern China as a tropical storm.

Shirley's 140 mph (230 km/h) winds and torrential rains devastated Taiwan, overflowing many rivers and trapping thousands.

Carmen lost intensity as it continued to the north, and made landfall on South Korea as a 50 mph (80 km/h) tropical storm on the 23rd.

The storm brought 50-foot (15 m) waves to the Korean peninsula, flooding coastal cities and sinking ships offshore.

Typhoon Lola hit the Philippines just days after Kit made landfall, resulting in an additional $15 million in damage, much of it to the rice crop.

The former was removed in light of the considerable loss of life in the Philippines; the latter was stricken due to its unusually long track.