[4] Over next two months, however, fluctuations in sea surface temperatures, particularly those in the Central Pacific, caused the group to revise their predictions downward and indicated the probability for a slightly below average typhoon season in their June forecast.

[12] The JTWC also issued warnings on storms within the basin, operating from Pearl Harbor in Hawaii to represent the interests of the United States Armed Forces in the Indian and Pacific Oceans.

[1] Three of the four tropical storms monitored by the JMA approached or hit Japan,[12] including Typhoon Soudelor, which brought heavy rainfall and wind across the Ryukyu Islands and the Korean Peninsula.

[12] The second half of July, however, featured the development of typhoons Imbudo and Koni, which both tracked westward across the Philippines before striking areas near Saipan and other regions of southeastern China.

[12] Whilst the JTWC indicated that Yanyan peaked in strength late on January 18 with 1-minute sustained winds of 60 km/h (37 mph),[30] the JMA considered the system to have maintained the same intensity throughout its stint as a tropical storm.

[30] The JMA downgraded Yanyan to tropical depression at 1200 UTC on January 20 before the storm transitioned into an extratropical cyclone as its low-level circulation center decoupled from the primary mass of convection due to strong wind shear.

Intensification continued and late on April 15, Kujira reached its peak intensity with winds of 165 km/h (103 mph) and a minimum barometric pressure of 930 mbar (hPa; 27.46 inHg).

[17] Shortly after developing, Kujira caused two fatalities in Pohnpei in addition to minor agricultural and infrastructural damage;[17] similar effects were felt in Guam.

[31] Several days later, the typhoon prompted cyclone warnings and other precautionary measures in the Philippines after forecasts indicated the potential for strong winds and rain.

Gradual intensification followed, and at 1800 UTC that day Chan-hom reached its peak intensity with maximum sustained winds of 155 km/h (96 mph) and a minimum pressure of 940 millibars (940 hPa; 28 inHg).

However, after passing to the northeast, winds from the typhoon fanned volcanic ash from the recently erupting Anatahan volcano towards the island, prompting precautionary measures in Guam.

[1] Afterwards Linfa began reintensifying and reached its peak intensity on May 29 with maximum sustained winds of 100 km/h (62 mph) and a barometric pressure of 980 mbar (hPa; 28.94 inHg).

[1][12] Throughout the course of the day, Nangka continued to strengthen as it accelerated northeast, and peaked in strength with a barometric pressure of 985 mbar (985 hPa; 29.1 inHg) and maximum sustained winds of 95 km/h (59 mph), making it a severe tropical storm.

[12] However, upon moving through the Bashi Channel, conditions began to deteriorate due to increased wind shear, weakening the system and resulting in its downgrade to tropical depression status by the JMA at 1200 UTC on June 3.

[12] Due to its track away from landmasses, damage remained minimal; however, as Nangka passed to the south and east of Japan, the storm brought light rainfall to the country, peaking at 81 mm (3.2 in) in Minamidaitō, Okinawa.

[12] The storm rapidly intensified to the east of Taiwan as it developed a well-defined eye,[18] and while doing so passed over the Japanese island of Iriomote-jima at around 2030 UTC on June 17.

The tropical storm continued to weaken as it moved over the Gulf of Tonkin prior to a final landfall near Hanoi, Vietnam the following day.

[61] After moving into the South China Sea, turbulence produced by the storm resulted in an aviation incident involving a commercial airliner off the western Philippines.

[12] This intensity was held for several hours until less conducive atmospheric conditions slightly weakened the system; this was followed by Morakot making landfall on southern Taiwan on August 3.

[12] Once again at typhoon intensity, Krovanh clipped Hainan before moving over the Leizhou Peninsula on its way to a final landfall near Cẩm Phả, Vietnam on August 25.

Quick weakening due to land interaction occurred as Krovanh moved across northern Vietnam, where the storm met its demise the following day.

[16] On August 20, the JMA assessed Vamco as dissipating in the Taiwan Strait,[12] although the JTWC continued advisories until the storm moved ashore in southeastern China.

[73] On mainland China, rainfall peaked at 101 mm (4.0 in) in Wenzhou, Zhejiang, which were largely beneficial in easing drought conditions, while winds gusted to 100 km/h (62 mph).

[16] On the Chinese mainland, strong winds left 90% of the city of Shenzhen without power,[79] and killed 16 construction workers due to a half-finished building collapsing.

That day, it quickly intensified due to favorable conditions, developing a well-defined eye and reaching peak maximum sustained winds of 195 km/h (121 mph).

[23] In the middle of September, the monsoon trough spawned a rapidly organizing disturbance east-northeast of Luzon,[13] with weak wind shear and favorable conditions.

With favorable outflow, Ketsana quickly intensified into a typhoon on October 20 after developing an eye, and two days later, the JMA estimated peak winds of 165 km/h (103 mph).

[12] Simultaneously, the cyclone entered the area of responsibility of the Philippine Atmospheric, Geophysical and Astronomical Services Administration, which named it Tropical Storm Weng.

[102] On Hainan, the storm helped end one of the worst summer droughts in almost 65 years,[13] although it also left heavy crop damage, wrecking 64,000 ha (160,000 acres) of fields and killing 400 head of livestock.

[16] On October 5, the JMA monitored a tropical depression southeast of Taiwan that later passed near the island, producing heavy rainfall that peaked at 153 mm (6.0 in) in Ilan County.