Typhoon Nida made landfall on Monday near Hong Kong on the coast of China. At 5:00 p.m. EDT on Monday the center of Typhoon Nida was located at latitude 22.8°N and longitude 114.4°E which put it about 50 miles (80 km) east-northeast of Hong Kong. Nida was moving toward the northwest t 13 m.p.h. The maximum sustained wind speed was 95 m.p.h. (155 km/h) and there were wind gusts to 115 m.p.h. (185 km/h). The minimum surface pressure was 963 mb.
Typhoon Nida made landfall on the southeast coast of China just to the north of Hong Kong. The core of Nida is large and the typhoon is capable of causing wind damage on a regional scale. Wind blowing toward the coast could also generate a storm surge until Typhoon Nida moves farther inland. However, very heavy rain and fresh water flooding are much greater risks as Nida moves farther inland over China.
A subtropical ridge north of Nida is steering the typhoon toward the northwest and that general motion is expected to continue for the next several days. The ridge will steer Nida farther inland over southeastern China. Typhoon Nida’s fairly slow motion and large size mean that heavy rain could fall over an expansive area. The risk for flooding will continue as Nida moves inland.
Typhoon Nida brought wind and rain to northern Luzon on Sunday as it continued to move toward Hong Kong on the coast of China. At 11:00 p.m. EDT on Sunday the center of Typhoon Nida was located at latitude 20.4°N and longitude 118.3°E which put it about 340 miles (545 km) east-southeast of Hong Kong. Nida was moving toward the west-northwest at 17 m.p.h. (27 km/h). The maximum sustained wind speed was 75 m.p.h. (120 km/h) and there were wind gusts to 90 m.p.h. (145 km/h). The minimum surface pressure was 974 mb.
The Hurricane Intensity Index (HII) for Typhoon Nida is 10.4. The Hurricane Size Index (HSI) is 13.1 and the Hurricane Wind Intensity Size Index (HWISI) is 23.5. These indices suggest that Typhoon Nida will be capable of causing minor wind damage on a regional scale.
The structure of Typhoon Nida changed significantly on Sunday. The primary rainband wrapped around the core of the circulation and a very large eye was created at the center. The diameter of the eye is approximately 50 miles (80 km). The strongest winds are occurring in the ring of thunderstorms that surrounds the eye. Other spiral bands of thunderstorms are rotating around the large eye. The thunderstorms were generating upper level divergence which pumped out mass and allowed the surface pressure to decrease.
Typhoon Nida is in an environment that would favor intensification. It is moving over water where the Sea Surface Temperature is near 30°C. Easterly winds are blowing in the upper levels, but there is not much vertical wind shear. The large size of the eye of Nida is the major factor inhibiting intensification. It takes more energy to increase the wind speed in a large typhoon than it does in a smaller storm. If the eye contracts, then Typhoon Nida could intensify more before it makes landfall.
A subtropical ridge north of Nida is steering the typhoon toward the west-northwest and that general motion is expected to continue for another day or so. On its anticipated track Typhoon Nida will be very near Hong Kong in about 24 hours.
As mentioned above, the large size of Typhoon Nida means that it will be capable of causing wind damage on a regional scale. In addition, Typhoon Nida will be capable of creating a significant storm surge when it moves into the coast of China. A large slow moving typhoon like Nida will also produce heavy rain and flooding as it moves inland.