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

[8] On July 16, the Guy Carpenter Asia-Pacific Climate Impact Centre (GCACIC) and the City University of Hong Kong's School of Energy, released their seasonal forecast for the period between June 1 – November 30.

[15] Tropical Storm Mekkhala, on January 13, developed and approached the Philippines where it caused minor damages and also notably interrupted Pope Francis's visit to the country.

During the opening days of March 2015, a major westerly wind burst occurred, which subsequently contributed to the development of the 2014–16 El Niño event and Tropical Storm Bavi.

[65] Bavi and its precursor tropical disturbance impacted eastern Micronesia, with strong to gale-force winds of between 45–65 km/h (30–40 mph), reported on various atolls in the Marshall Islands.

High winds, measured up to 114 km/h (71 mph) at the local National Weather Service office, downed numerous trees, power lines, and tore off roofs.

[85] Haishen remained at low-level tropical storm strength until its center became fully exposed with its deepest convection deteriorating due to wind shear.

[87] Haishen knocked down several fruit trees on Fananu, while the heavy rains were considered to be a positive blessing, as they restored water levels on the island, that had been damaged a few days earlier by Maysak.

[105][106] During June 19 the JMA started to monitor a tropical depression that had developed within the South China Sea about 940 km (585 mi) to the southeast of Hanoi, Vietnam.

[174] After three days of slow strengthening, Nangka was upgraded to a severe tropical storm on July 6, because of favorable environments such as a symmetrical cyclone, an improving outflow and low vertical windshear .

[207][208] An improved convective signature, expanding moisture field and shallow banding wrapped into the system prompted both agencies to upgrade it to a tropical storm early on July 20.

[240] Because of a well-defined but an exposed low-level circulation center with deep flaring convection over the storm's eastern periphery, the JTWC upgraded the system to a tropical depression, designating it as 14W.

[250] During the next day, Molave entered in an area of marginally favorable conditions with low to moderate vertical wind shear, with its circulation becoming partially exposed.

[261][262] During the night of August 15, the JMA upgraded Goni to a severe tropical storm as windshear started to calm whilst deep convective banding wrapping into its circulation.

[281] Later that day, satellite imagery showed that Atsani was more symmetric and deep with feeder bands wrapping tighter into an expanded 34 nautical-mile diameter eye.

[285][286] Vertical windshear started to intensify to a moderate scale and dry air persisted within the north and western part of Atsani and its eyewall began to erode.

[289] Atsani maintained that intensity as it started to move in a northeastward direction and began to interact with higher vertical wind shear associated by the mid-latitude baroclinic zone late on August 23.

[292] The JTWC issued its final warning later that day;[293] During August 25, Atsani became an extra-tropical cyclone, while it was located about 1,650 km (1,025 mi) to the northeast of Tokyo, Japan.

[360] The convective core started to struggle due to dry air over the western periphery and Krovanh moved in an area of increasing vertical windshear, resulting in a weakening trend.

[382][383] With favorable environments aloft, evident by excellent radial outflow, deep convective banding and very low shear, Dujuan maintained its intensity.

[384] However, on September 28, Dujuan's large symmetrical eye began to be cloud-filled as it interacted with the mountainous country of Taiwan, resulting in weakening[385] and then landfall over Nan'ao, Yilan.

[401][402] Due to favorable conditions aloft, Mujigae explosively intensified into a Category 4-equaivlent typhoon (based on JTWc data) as cooling clouds tops surrounded the eye.

[411][412] Despite favorable conditions, Choi-wan maintained its intensity as a weak system due to a large and very broad circulation; mesovortices were seen on satellite imagery rotating cyclonically in its center.

[418][419] Later that day, the JTWC issued its final warning as Choi-wan moved further northward with increasing and high vertical wind shear and was downgraded to high-end tropical storm intensity.

[437] On October 20, the JMA started to monitor a tropical depression embedded within a moderately conducive environment aloft, about 400 km (250 mi) to the southwest of Wake Island.

[453][454] The depression's low level circulation center was fully exposed, while isolated amounts of deep atmospheric convection flared over the systems southwestern quadrant.

[454] Following an increase in convection of the center,[455] the JTWC subsequently initiated advisories on the system and classified it as Tropical Depression 26W during October 22, while it was located about 1,430 km (890 mi) to the east of Iwo To, Japan.

[489] Due to the severe damage brought about by the typhoon in the provinces of Southern Luzon, Oriental Mindoro, and Visayas, Philippine President Benigno Aquino III declared a "State of National Calamity" in the country.

[500][501] Over the next day the system moved into an area of moderate vertical wind shear, with atmospheric convection becoming displaced to the west of the fully exposed low level circulation center.

[529] While the name Nonoy was originally included on the list, it was changed to Nona as it bears similarity to the term "Noynoy", the incumbent president's nickname at that time.