Typhoon Yunya (1991)

Typhoon Yunya (Diding)
Yunya as a Category 2 typhoon on June 13
Meteorological history
FormedJune 11, 1991
DissipatedJune 17, 1991
Typhoon
10-minute sustained (JMA)
Highest winds150 km/h (90 mph)
Lowest pressure950 hPa (mbar); 28.05 inHg
Category 3-equivalent typhoon
1-minute sustained (SSHWS/JTWC)
Highest winds195 km/h (120 mph)
Overall effects
Fatalities6 direct, 320 indirect
Areas affectedPhilippines, Taiwan
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Part of the 1991 Pacific typhoon season

Typhoon Yunya, known in the Philippines as Typhoon Diding, was a strong tropical cyclone whose landfall in the Philippines coincided with the 1991 eruption of Mount Pinatubo. A small tropical cyclone, Yunya rapidly developed from a tropical disturbance near East Samar on June 11. By June 13 the storm had reached typhoon status as it moved west-northwest near the Philippines. Yunya attained its peak intensity the following day with estimated winds of 145 km/h (90 mph);[nb 1] however, strong wind shear soon impacted the typhoon and caused it to rapidly decay. The storm struck southern Luzon early on June 15 as a minimal typhoon before moving over the South China Sea later that day. After turning north and weakening to a tropical depression, the system brushed the southern tip of Taiwan on June 16 before dissipating the following day.

Across the Philippines, Yunya produced heavy rains that triggered significant flooding. Hundreds of homes and several bridges were washed away by swollen rivers. Six people were killed as a direct result of the storm, 2,013 homes were destroyed, and 24 others were damaged. Although the storm itself caused significant damage, the worst effects were related to the system's heavy rains mixing with volcanic ash from Mount Pinatubo, creating massive lahars that killed 320 people.
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