Typhoon Olive (1978)

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Map key
  Tropical depression (≤38 mph, ≤62 km/h)
  Tropical storm (39–73 mph, 63–118 km/h)
  Category 1 (74–95 mph, 119–153 km/h)
  Category 2 (96–110 mph, 154–177 km/h)
  Category 3 (111–129 mph, 178–208 km/h)
  Category 4 (130–156 mph, 209–251 km/h)
  Category 5 (≥157 mph, ≥252 km/h)
  Unknown
Storm type
Disc Plain black.svg Tropical cyclone
Solid black.svg Subtropical cyclone
ArrowUp.svg Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

In April 1978, the near-equatorial trough steadily tracked northwards, making cyclogenesis more likely to occur. On 12:00 UTC on April 11, the Joint Typhoon Warning Center (JTWC) began to monitor a surface circulation which had formed within the trough. Five days later, the JTWC issued their first warning on the system as Tropical Depression 02W as the nascent system began coalescing. [1] On April 18, the system entered the Philippine Area of Responsibility, resulting in the Philippine Atmospheric, Geophysical and Astronomical Services Administration (PAGASA) naming the system Atang. [2] Later that day, the system intensified into a tropical storm, resulting in it being named Olive. Soon after, Olive crossed the Leyte Gulf and the Philippine Islands, which hindered intensification. [1]

Olive would steadily intensify after it entered the South China Sea on April 20, being in an environment with good outflow aloft and warm Sea surface temperatures, resulting in it intensifying into a typhoon on 6:00 UTC on April 22. Olive would recurve due to a break in the subtropical ridge, peaking with sustained winds of 100 mph (160 km/h) the next day. Olive would accelerate to the east-northeast, steadily weakening due to intruding cool and dry air, resulting in the system becoming extratropical early on April 26. [1]

Preparations and impacts

As Olive passed the Philippines, it would affect nearly 370,000 people in the nation, leaving 3,500 homeless. [2] [3] The MV Leyte, a lengthened ship of the Compania Maritima was caught in it, being wrecked in the southwestern portion of Sibuyan Island as she was on a Manila-Cebu voyage. [4] The Hong Kong Observatory would hoist its Stand-By Signal No. 1 on April 24 as Olive neared the island but would lower it hours later as it left the area. Despite not affecting the island in any way, Olive would bring some light storm surges to the island. [5] In total, 66 people died, mainly in the Philippines. [2]

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References

  1. 1 2 3 1978 TCR – Joint Typhoon Warning Center (Retrieved 1/17/24)
  2. 1 2 3 "DESTRUCTIVE TYPHOONS 1970-2003". baseportal.com. Retrieved January 18, 2024.
  3. "Typhoon". The Canberra Times . April 27, 1978. Retrieved October 23, 2016 via Trove.
  4. "Typhoon "Atang" | Philippine Ship Spotters Society". psssonline.wordpress.com. Retrieved October 23, 2016.
  5. "Meteorological Statistics 1978: Part 3 (Tropical Cyclone Summaries)" (PDF). Hong Kong Observatory : 14. 1979.
Typhoon Olive (Atang)
Temporary cyclone north.svg