Typhoon Rose (1971)

Meteorological history

On August 6, the Japan Meteorological Agency (JMA) began monitoring an area of disturbed weather in the vicinity of the Federated States of Micronesia.{{cite report|title=1971 ROSE (1971218N08161)

Rose intensified further while tracking generally westward at 16 mph. Around midday on August 13, the typhoon attained a primary peak intensity with winds of 125 mph, equivalent to a Category 3 hurricane on the Saffir–Simpson hurricane wind scale. Rose weakened slightly before making landfall in Palanan, Isabela, Philippines, with winds of 110 mph. The storm weakened further while crossing island of Luzon and emerged into the South China Sea early on August 14 as a minimal typhoon. Rose immediately began to re-intensify. A high-pressure area that had steered the typhoon for the last several days weakened significantly, causing Rose to re-curving northwestward and decelerated to a forward speed of 8 mph. Deepening continued, with the typhoon peaking with maximum sustained winds of 140 mph – equal to a Category 4 hurricane on the Saffir–Simpson hurricane wind scale – early on August 16. Later that day, a ship in the vicinity of the eye observed a barometric pressure of 950 mbar – the lowest in relation to the cyclone.

At around 12:00 UTC on August 16, reports from the JTWC indicate that Rose weakened slightly while approaching the Hong Kong and the coast of China. Hours later, the storm made landfall at Lantau Island with winds of 105 mph. Rose was the most intense typhoon to strike Hong Kong since Wanda in 1962. Moving inland, the system rapidly weakened to a tropical storm early on August 17 and dissipated shortly thereafter.

Preparations

In Hong Kong and the Royal Observatory, a strong wind signal, no. 3, was hoisted at 13:05 UTC on August 16. That day, the Royal Observatory warned that because of the small size of Rose, winds might increase rapidly. The storm signal, no. 7, was raised at 05:50 UTC on August 17. Less than three hours later, the storm signal was changed to no. 8.

Impact

In the Philippines, a Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) station in Tuguegarao observed sustained winds speeds up to 86 mph. However, impact was relatively minor, with Luzon escaping serious damage. Downed communication lines and damage to houses were reported.

Rose produced a fog bank before making landfall, which is unusual for a tropical cyclone. The storm was the strongest cyclone to strike Hong Kong since Typhoon Wanda in 1962. Along the coast, the typhoon generated waves of 9.5 m and a storm surge of 0.375 m was recorded in Lantau. The storm surge and heavy waves proved dangerous to ships offshore, at least 300 boats sank or were badly damaged by the typhoon. Eighty-eight deaths occurred after the Hong Kong-Macau ferry capsized. The USS Regulus, a United States Navy vessel, was among the ships that suffered damage. Three United States Seventh Fleet rescue ships searched for survivors. Additionally, Royal Navy minesweepers and Royal Air Force whirlwind helicopters also arrived at Hong Kong, with the latter coordinating with the marine police. Overall, the sinking ships resulted in 110 fatalities, as well as 300 injuries.

Strong winds were reported, including a gust up to 278 km/h at Tai Mo Shan. Many scaffolds, signboards, trees, and boughs were knocked down. Fire broke out around 15:00 UTC on August 16 at a large power sub-station in Kwun Tong. Due to the strong winds, firefighters were unable to sometimes unable to control the flames. By 16:30 UTC, the fire was put out. However, it triggered power outages, with blackouts in the Kowloon Peninsula and New Territories. Thousands of people were trapped in elevators during the widespread electrical failures. Heavy rainfall was also recorded, with up to 161.7 mm of precipitation. Several low-lying areas were flooded. Numerous landslides blocked approximately 110 roads, 30 of which were severely obstructed. One landslide buried four children after crashing into their village hut, killing two, while one survived and was taken to the hospital, and the fourth remained missing.

A total of 5,644 people – approximately 1,032 families – were left homeless, with 653 huts destroyed. Twenty-four buildings were damaged, with six beyond repair or demolished. Communications were disrupted, with 30,000 telephones out of service. Hundreds of pigs and over 40,000 chickens as well as other poultry were killed. Roughly 1,356 hectares of vegetable and garden crops damaged. Additionally, 20,000 fruit trees were blown down. Considerable loss of pond fish due to overflow was also reported. On land, Rose was attributed to 24 fatalities.

References

References

1. Joint Typhoon Warning Center. (1971). "Annual Tropical Cyclone Report: 1971". United States Navy, United States Air Force.
2. (August 14, 1971). "Typhoon's Rains Pass Philippines". [[Charleston Daily Mail]].
3. (August 17, 1971). "Typhoon Rose Lashes Hong Kong". [[Sarasota Journal]].
4. (August 18, 1971). "Typhoon toll may top 100". [[The Canberra Times]].
5. (December 18, 2012). "Typhoon Rose August 10 - 17, 1971". [[Hong Kong Observatory]].
6. (August 21, 1971). "Typhoon takes nine more lives". The Canberra Times.