Noru underwent rapid intensification as it approached Luzon, with 10-minute maximum sustained winds intensifying by 85 km/h (50 mph) in the span of 24 hours.

Noru continued to re-intensify over the South China Sea, reaching winds of up to 155 km/h (100 mph) before making its third and final landfall in Da Nang, Vietnam.

On September 21 at 00:00 UTC, the Japan Meteorological Agency (JMA) began tracking a tropical depression at 22°N 141°E / 22°N 141°E / 22; 141, far east of the Philippine Sea.

[2] The Joint Typhoon Warning Center (JTWC) also began tracking the disturbance later on as the system slowly moved eastwards, deeper into the Pacific Ocean.

Analysis from the JTWC indicated that the system was in a favorable environment for development, with warm sea surface temperatures, low vertical wind shear, and medium radial outflow.

Around the same time, the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAGASA) noted the system's formation into a tropical depression.

As a system formed within the Philippine Area of Responsibility (PAR), it was immediately given the local name Karding, and the agency began releasing bulletins on the storm.

[7] After a lack of steering flow stalled the depression, it began tracking westward along a mid-level subtropical high, maintaining its intensity as it failed to consolidate further despite its favorable environment.

[12] Up until this point, forecasts from all three agencies expected wind speeds of only up to 55 knots (100 km/h; 65 mph); the JTWC further cited a weak upper-level outflow and dry air as hindrances to rapid intensification.

[18] Intensifying 20 knots (35 km/h; 25 mph) in the course of 12 hours, the JMA and the PAGASA upgraded the storm into a typhoon by 12:00 UTC; the JTWC following shortly after as Noru's eye began to form.

[19][20][21] Under very favorable conditions for development, Noru continued its trend of rapid intensification, reaching its peak intensity of 95 knots (175 km/h; 110 mph) 10-minute maximum sustained winds with a minimum central barometric pressure at 940 hectopascals (940 mbar; 28 inHg) by 00:00 UTC on September 25, a mere 230 kilometres (140 mi) east of Infanta, Quezon.

[25] Following interaction with land over the Polillo Islands, the PAGASA downgraded the system to a high-end typhoon, just prior to its second landfall over Dingalan, Aurora at 20:20 PHT (12:20 UTC).

[26] Now tracking westward over Central Luzon, Noru weakened further as it interacted with land and the rugged terrain of the Sierra Madre mountain range; the eye of the system later disappeared from multispectral satellite imaging.

[29][28] As the typhoon re-entered the South China Sea, it was met with a neutral environment for development, but was able to re-consolidate and form a 17 nautical miles (31 km; 20 mi) eye.

[32] Returning to favorable conditions over the South China Sea, Noru re-intensified to a Category 4-equivalent super typhoon on September 27, reaching 10-minute maximum sustained winds of 155 km/h (100 mph).

[35][36] At 21:00 UTC, the cyclone made landfall just south of Da Nang, Vietnam; the JTWC released its final warning on the storm shortly after.

[47][48] On September 24, the Magat Dam began discharging excess water at a rate of 200 cubic centimetres (12 cu in) per second in preparation for the storm.

[53] The Office of Civil Defense (OCD) in Cagayan Valley was put on red alert; bans on sailing, fishing, and the sale of liquor were imposed on the region.

[54] The Department of Social Welfare and Development (DSWD) and the provincial disaster agency for Cagayan also secured funds for immediate response and prepared food packs and personnel throughout the region.

[56] The National Disaster Risk Reduction and Management Council (NDRRMC) was also put on red alert as it activated its Emergency Operations Center teams.

[62][63] The DPWH also began preparing quick response teams consisting of maintenance personnel and equipment which will oversee the possibility of roads in affected areas.

[68] In the morning of September 25 (PHT), following a sustained period of rapid intensification, the PAGASA assessed the storm's development into a super typhoon.

[81] The cities and lone municipality of Metro Manila, with the exception of Makati, all independently declared the suspensions of classes on all levels for the following day, September 26 (a Monday).

[85][86] National Collegiate Athletic Association and Shakey's Super League games were canceled as the storm neared Metro Manila — under Signal No.

[96] In the province of Nghệ An, floodings caused by Noru inflicted substantial damages that worth approximately 1 trillion VND (US$41.8 million).

[123] In Thừa Thiên Huế province, attributable property damages caused by Noru and its floodings reached 1.102 trillion VND (US$45.8 million).

The mountain range, which serves as a natural barrier protecting much of eastern Luzon from tropical cyclones, has been the subject of destructive human activity, most notably the recent construction of the Kaliwa Dam in the Quezon province.

"Where is the president") on social media and called the move insensitive, citing the undergoing evacuations, expected agricultural losses, and affected farmers and fisherfolk.

[141] On September 26, DSWD Secretary Erwin Tulfo made visits to municipalities in the provinces of Quezon and Aurora and led the distribution of financial aid to affected families.

[146] Philippine Red Cross staff and volunteers also provided meals in evacuation centers, helped in cleaning operations, and assisted evacuees returning to their homes.