Typhoon Vanessa (1984)

Super Typhoon Vanessa, known in the Philippines as Typhoon Toyang was a Super typhoon that formed in October 1984. Vanessa was the strongest storm of 1984 Pacific typhoon season.

Super Typhoon Vanessa (Toyang)
Typhoon (JMA scale)
Category 5 super typhoon (SSHWS)
Vanessa (28 Oct)
FormedOctober 22, 1984
DissipatedOctober 30, 1984
Highest winds10-minute sustained: 220 km/h (140 mph)
1-minute sustained: 305 km/h (190 mph)
Lowest pressure880 hPa (mbar); 25.99 inHg
Part of the 1984 Pacific typhoon season

Meteorological history
Most intense Pacific typhoons
Typhoon Season Pressure
hPa inHg
1 Tip 1979 870 25.7
2 June 1975 875 25.8
Nora 1973
4 Forrest 1983 876[1] 25.9
5 Ida 1958 877 25.9
6 Kit 1966 880 26.0
Rita 1978
Vanessa 1984
9 Irma 1971 884 26.1
10 Nina 1953 885 26.1
Joan 1959
Megi 2010
Source:JMA Typhoon Best Track Analysis
Information for the North Western Pacific Ocean.[2]
track of Vanessa

This system formed in the near equatorial trough southeast of Ponape a few days after Thad on October 20. The system moved northwest to just north of Ponape as it slowly developed. The disturbance strengthened into a tropical depression by October 22 and a tropical storm October 23 despite some northwesterly shear from Thad. 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), mainly to the banana crop.[3] Moving west-northwest, Vanessa continued to strengthen, becoming a super typhoon. Super Typhoon Vanessa was the strongest typhoon of the season, reaching maximum sustained wind speeds of 190 miles per hour (310 km/h) over the open waters of the West Pacific. At its peak, it had a pressure of 880 mb, only 10 millibars higher than the record-setting Typhoon Tip of 1979. Its central pressure fell 100 mb in 48 hours. The intense cyclone recurved on October 27 and October 28 as a cold front approached from the northwest. Vanessa slowly merged with the frontal boundary, becoming a storm-force extratropical cyclone late on October 30.[4]

Impact

Though the storm did not directly impact the Philippines, its outer bands triggered flooding that killed 63 people.[5]

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References
  1. "World Tropical Cyclone Records". World Meteorological Organization. Arizona State University. Retrieved December 12, 2013.
  2. Japan Meteorological Agency. "RSMC Best Track Data (Text)" (TXT).
  3. Joint Typhoon Warning Center (1985). Super Typhoon Vanessa. Retrieved on 2007-01-13. Archived June 7, 2011, at the Wayback Machine
  4. Joint Typhoon Warning Center (1985). Super Typhoon Vanessa. Retrieved on 2007-01-13. Archived June 7, 2011, at the Wayback Machine
  5. "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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