These agencies included the Tropical Storm Risk (TSR) Consortium of University College London, PAGASA and Taiwan's Central Weather Bureau.

[4] On March 15, the Vietnamese National Center for Hydro Meteorological forecasts (VNCHMF) predicted that roughly twelve to thirteen tropical cyclones would affect Vietnam during 2018, which is above average.

Systems like Tropical Storms Son-Tinh, Ampil, Josie, Wukong, Jongdari, Shanshan, Yagi, Leepi, Bebinca, and Rumbia formed between late July and early August.

[23] Due to strong southwesterly wind shear, the cyclone remained poorly organized, with disorganized convection near an exposed low-level circulation.

[24] Conditions gradually became more favorable for further development, resulting in Jelawat steadily strengthening and gaining organization before intensifying into a severe tropical storm at 18:00 UTC on March 28.

[26] Explosive intensification then ensued over the following 36 hours as the eye became sharply defined, and Jelawat attained its peak intensity later that morning, with estimated 10-minute sustained winds of 195 km/h (121 mph) and a central pressure of 915 hPa (27.0 inHg).

[28] Immediately after peaking in intensity, Jelawat began weakening rapidly due to a sharp increase in wind shear and dry air, and the storm fell below typhoon strength late on March 31.

Jelawat yielded 20 inches of rainfall on parts of the island of Pohnpei, resulting in flooding and landslides that caused critical damage to infrastructure and one death.

[51] Moving northward, Maliksi continued to intensify until it reached its peak strength early on June 10 with winds of 110 km/h (68 mph), just shy of typhoon intensity, and a minimum pressure of 970 hPa.

[57] Despite being affected by moderate to severe wind shear, the system was located over relatively warm sea-surface temperatures as it produced patches of convection, and this prompted the JTWC to upgrade 07W to a tropical storm.

[72][73] Favorable environmental conditions, including moderate vertical wind shear, poleward outflow enhanced by tropical upper tropospheric trough (TUTT) cells located to the northeast and to the northwest, sea surface temperatures between 30 and 31 °C, were contributing to the development of the system on July 4.

[75] Six hours later, when the storm struck Guam directly, surface observations at Andersen Air Force Base recorded one-minute maximum sustained winds of 50 knots (93 km/h; 58 mph) and a minimum pressure of 984 hPa (29.06 inHg), indicating a rapidly consolidating system.

At around 01:10 UTC on July 11, Maria made landfall over the Huangqi Peninsula of Lianjiang County, Fuzhou in Fujian, China with ten-minute maximum sustained winds of 155 km/h (96 mph) and a central pressure of 955 hPa (28.20 inHg).

[99] Late on July 21, the JTWC began to issue advisories on Tropical Depression 14W as it developed about 603 km (375 mi) east-southeast of the Japanese island of Minami-Tori-shima.

[101] Within the next 24 hours, 14W began to organize with deep convection obscuring its LLCC,[102] and at 12:00 UTC on July 23, the JMA upgraded the system to a tropical storm, naming it Wukong.

[108] After slow consolidation for several days, the system was upgraded to a tropical storm near Okinotorishima at around 18:00 on July 24 by the JMA and the JTWC, being assigned the international name Jongdari.

[112] On July 26, as Jongdari started to interact with an upper-level cold-core low to the north which significantly enhanced poleward outflow,[113] it intensified to a typhoon in the afternoon despite increasingly unfavorable vertical wind shear.

[114] Over the warm sea surface temperatures between 29 and 30 °C (84 and 86 °F) near the Ogasawara Islands, JMA reported that Jongdari had reached peak intensity at 00:00 UTC on July 27, with ten-minute maximum sustained winds of 140 km/h (87 mph) and a minimum central pressure of 965 hPa (28.5 inHg).

[118][119] The storm weakened rapidly inland before making its second landfall over Buzen, Fukuoka Prefecture, at around 17:30 JST (08:30 UTC), with ten-minute sustained winds of 75 km/h (47 mph) and a central pressure of 992 hPa (29.3 inHg).

Kyoto Station received a lot of damage, the glass above the atrium covering the central exit, shops and hotel, collapsed, narrowly missing a few by centimeters.

The terrain of Khabarovsk Krai contributed to the steadily weakening trend as the system moved inland northwestward and then northward; extratropical low passed northeast of Ayan early on September 7.

On September 12, at 3 pm Philippine Standard Time, Mangkhut entered the PAR as a Category 5 super typhoon, and accordingly, PAGASA named the storm Ompong.

The JTWC noted additional strengthening on September 12, and assessed Mangkhut to have reached its peak intensity at 18:00 UTC, with maximum one-minute sustained winds of 285 km/h (177 mph).

Over the next 2 days, Tropical Storm Barijat moved westward across the South China Sea, reaching its peak intensity with 10-minute maximum sustained wind speeds of 85 km/h on the night of September 11.

During this period of time, another eyewall replacement cycle that eventually failed later on, coupled with decreasing sea surface temperatures, started to slowly weaken Trami, although it still remained an organized storm.

[178] Over the next couple of days, the system moved westward and organized into a tropical depression on September 27, and the JMA initiated advisories on the storm, while the JTWC issued a TCFA.

Affected by vertical wind shear, low ocean heat content and decreasing sea surface temperatures, the storm gradually weakened to a Category 3 typhoon on October 3 while undergoing an eyewall replacement cycle.

[190][191] After making landfall on Tinian, Yutu underwent an eyewall replacement cycle, which it successfully completed on the next day, and the storm strengthened back to Category 5 super typhoon status on October 26, at 15:00 UTC.

However, after completing an anticyclonic loop due to the influences of nearby weather systems, entering and exiting the PAR multiple times, Man-yi dipped to Category 1 status and moved into cooler waters.

[199] While passing over the Philippines, Usman brought heavy rains that caused several landslides, which killed 156 people, with damages amounting to Php5.41 billion (US$103 million).