Typhoon Ofelia, known as Typhoon Bising in the Philippines, was the first of two typhoons in 1990 to directly affect the Philippines within a week. Typhoon Ofelia originated from an area of disturbed weather embedded in the monsoon trough situated near the Caroline Islands. Slowly organizing, the disturbance tracked westward, and was designated a tropical depression on June 15. After an increase in convection, the depression was upgraded into a tropical storm on June 17. On June 19, Ofelia turned northwest and after development of a central dense overcast, Ofelia was upgraded into a typhoon late on June 20. After turning north, Ofelia obtained its maximum intensity following the development of an eye. The typhoon skirted past the northeastern tip of Luzon and near the east coast of Taiwan, commencing a rapid weakening trend. On the evening on June 23, Ofelia struck the southern portion of Zhejiang. The storm then began to track north, recurving towards the Korean Peninsula. The storm tracked through the province of Jiangsu, and at 00:00 UTC on June 24, transitioned into an extratropical cyclone, only to merge with a frontal zone on June 25.
Although the inner core avoided the Philippines, the storm's large size resulted in inundation across the northern Philippines. The province of La Union was the hardest hit by the typhoon, where 22 people were killed and 90 homes were crushed. Three children perished and six others sustained injuries in Pasig. Overall, 56 people were killed and over 85,000 individuals were forced to flee their homes. Taiwan bore a direct landfall from Ofelia, dropping up to of rain. Hualien City was the hardest hit by the typhoon, where five people were killed. In all, Ofelia was the worst to hit eastern Taiwan in 30 years. More than 200 houses were destroyed or damaged and roughly of rice paddies and vegetables were flooded. Roads and highways were blocked by landslides and floods. Agricultural losses exceeded NT$2.55 billion (US$94.7 million). Seventeen people died and twenty-three were missing due to flooding and mudslides. Although during a weakening phase at the time, the typhoon drenched central China. In Wenzhou, 12 people were killed and monetary damage was estimated at 205 million RMB (US$42.8 million). In the province of Zhejiang, 15 fatalities were reported and 21 others were injured. In the neighboring province of Fujian, 15 people perished and 9,044 houses were demolished. About of farmland were inundated and damage was estimated at 338 million RMB (US$70.5 million). Nationwide, 40 people were killed by Ofelia.
Meteorological history
Typhoon Ofelia, the third typhoon of the season and first of June, originated from the monsoon trough situated near the Caroline Islands. On the morning of June 15, the Joint Typhoon Warning Center (JTWC) began to track an area of persistent convection with winds of . Eighteen hours later the Japan Meteorological Agency (JMA) upgraded the system into a tropical depression. Initially, the depression tracked westward along the periphery of a subtropical ridge and in an environment of high wind shear that slowed the rate of organization. Following an increase in convection and curved banding features and an improvement in outflow, the JTWC issued a tropical cyclone formation alert for the system on the morning of June 17. An increase in organization warranted the JTWC to classify the system as a tropical depression at noon that day. At the time, the depression was located roughly west of Yap. At 18:00 UTC on June 17, the JMA opted to upgrade the depression into a tropical storm. Based on a Dvorak intensity estimate of T2.5/, the JTWC upgraded the depression into a tropical storm at 00:00 UTC on June 18.