Typhoon Vanessa

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Saffir–Simpson scale
  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

A low pressure area developed from a near equatorial trough southeast of Ponape on October 20, moving northwest until being well north of the island as it slowly developed. The disturbance strengthened into a tropical depression on October 22 and a tropical storm ( receiving the name Vanessa ) on October 23. The next day, Vanessa strengthened into a minimal typhoon. [1]

Moving west-northwest, Vanessa began to explosively intensify on October 25, becoming a super typhoon two days later. Super Typhoon Vanessa continued to intensify throughout the day, reaching its peak intensity with maximum sustained wind speeds of 180 miles per hour (290 km/h) well west of the Philippines. At its peak, it had a pressure of 880 mb, which makes it tied as the seventh most intense tropical cyclone on record, behind Ida of 1958 and only 10 millibars higher than the record-setting Typhoon Tip of 1979. Vanessa's central pressure had fallen at a near-record pace of 100 mb in 48 hours. The intense cyclone recurved to the northeast on October 27 and 28 as a cold front approached from the northwest. Vanessa slowly weakened and began to merge with the frontal boundary, becoming a storm-force extratropical cyclone late on October 30 before being absorbed by the front later that day. [1]

Impact

Typhoon Vanessa (Toyang)
Vanessa 1984-10-26 1200Z.png
Vanessa at peak intensity on October 26
Most intense Pacific typhoons
TyphoonSeasonPressure
hPa inHg
1 Tip 1979 87025.7
2 June 1975 87525.8
Nora 1973
4 Forrest 1983 876 [2] 25.9
5 Ida 1958 87725.9
6 Rita 1978 87826.0
7 Kit 1966 88026.0
Vanessa 1984
9 Nancy 1961 88226.4
10 Irma 1971 88426.1
11 Nina 1953 88526.1
Joan 1959
Megi 2010
Source: JMA Typhoon Best Track Analysis
Information for the North Western Pacific Ocean. [3]

As a minimal typhoon, Vanessa moved about 165 kilometres (103 mi) south of Guam, where winds gusted to 59 knots (109 km/h) on Nimitz Hill. Damage on the island totaled US$1.7 million (1984 dollars, US$4.98 million in 2023), mainly to the banana crop. [1]

Though the storm did not directly impact the Philippines, its outer bands triggered flooding that killed 63 people. [4]

References

  1. 1 2 3 Joint Typhoon Warning Center; Naval Pacific Meteorology and Oceanography Center (1987). Annual Tropical Cyclone Report: 1984 (PDF) (Report). United States Navy, United States Air Force. Retrieved May 19, 2017.
  2. ↑ "World Tropical Cyclone Records". World Meteorological Organization . Arizona State University . Retrieved December 12, 2013.
  3. ↑ Japan Meteorological Agency. "RSMC Best Track Data (Text)" (TXT).
  4. ↑ "Destructive Typhoons 1970–2003". National Disaster Coordinating Council. November 9, 2004. Archived from the original on November 9, 2004. Retrieved April 22, 2013.
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