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

[15][nb 6] During this time, Tropical Storm Kammuri struck southern China with a large area of rainfall that damaged or destroyed 245,000 houses.

[10] Around that time, Tapah developed an eye feature beneath its convection, prompting both the JTWC and PAGASA to estimate peak winds of 95 km/h (59 mph).

[21] High winds and heavy rainfall affected the state, causing an islandwide power outage and destroying hundreds of houses.

[10] The JTWC estimated peak 1-minute winds of 260 km/h (160 mph) when the storm was about 610 km (380 mi) east of Catanduanes in the Philippines; this made Mitag became a super typhoon, the first one on record in the month of March.

[11] The system developed into a tropical depression on May 14 about 500 km (310 mi) southwest of Chuuk Lagoon,[10] and early the next day the JTWC initiated advisories.

[11] For several days the depression remained weak, until it intensified into a tropical storm named "Hagibis" on May 16, about 200 km (120 mi) southwest of Guam.

[nb 7][32] Rammasun was the first of four typhoons to contribute to heavy rainfall and deadly flooding in the Philippines in July; there were 85 deaths related to the four storms,[14] with 2,463 homes damaged or destroyed.

[37][38] After weakening into a tropical storm, Rammasun passed just west of the South Korean island of Jejudo,[11] where high waves killed one person.

[43] The rain produced floods up to 1.5 m (4.9 ft) deep,[44] causing deadly landslides across the island that killed 47 people; this made Chataan become the deadliest natural disaster in Micronesia's history.

[49] Halong struck southeastern Japan, dropping heavy rainfall and producing strong winds that left $89.8 million (¥10.3 billion JPY) in damage.

Taiwan had experienced drought conditions prior to Rammasun earlier, and additional rainfall from Nakri eliminated all remaining water restrictions.

[12] Fengshen gradually weakened while approaching Japan, and it crossed over the country's Ōsumi Islands on July 25 as a severe tropical storm.

[66] After affecting Japan, Fengshen weakened in the Yellow Sea into a tropical depression, before moving across China's Shandong Peninsula and dissipating on July 28.

An increase in convection the next day prompted the JTWC to upgrade the system to a tropical storm before it moved over Luzon and the Metro Manila area.

[24] Juan dropped heavy rainfall in the Philippines during its passage,[11] only weeks after several consecutive tropical systems caused deadly flooding in the country.

[10] On July 22, the storm began undergoing the Fujiwhara effect with the larger Typhoon Fengshen to the east, causing Fung-wong to turn southwestward.

[12] The combination of cooler waters, wind shear, and dry air caused weakening,[11] and the storm deteriorated into a tropical depression on July 27.

[11] Deep convection with outflow persisted around a circulation,[12] and at 06:00 UTC on July 20 the JMA classified the system as a tropical depression, just east of the date line and about 980 km (610 mi) west-southwest of Johnston Atoll.

[12] Kalmaegi moved northwestward due to a ridge to the north, and initially a tropical upper tropospheric trough provided favorable conditions.

[10] The storm produced a record wind gust there of 204 km/h (127 mph),[18] and just south of the city, high waves destroyed several piers and a large boat.

[98] Moving to the west due to a ridge to the north,[11] it slowly organized,[98] forming into a tropical depression on September 9 in the South China Sea.

[11] For several days the depression failed to organize further, despite favorable conditions; however, late on September 24 the circulation developed rainbands and a weak eye feature.

[10] Wind shear was weak and outflow was good, which allowed for slow strengthening; however, the system was elongated, with a separate circulation to the west.

[10] Despite the broad structure,[106] with an exposed circulation at the peak, the JTWC estimated winds as high as 130 km/h (81 mph), making Bavi a typhoon.

[10] On two occasions, the JTWC assessed Maysak as briefly intensifying into a typhoon,[107] based on an eye feature, although increased shear later caused weakening.

[97] Despite favorable inflow patterns and warm sea surface temperatures,[106] Huko only strengthened to reach peak winds of 140 km/h (87 mph).

Dry air caused Huko to weaken slightly, and on November 4 the typhoon passed about 95 km (59 mi) northeast of Wake Island.

[11] After striking Guam, Pongsona began moving to the north and later to the northeast, quickly weakening due to the presence of dry air and interaction with an approaching mid-latitude storm.

[116] The JMA monitored a tropical depression east of Iwo Jima on July 25, although by the next day the agency was no longer tracking the system.