Typhoon Bobbie (Asiang)
Bobby near peak intensity on June 26
Meteorological history
FormedJune 23, 1992
ExtratropicalJuly 1, 1992
DissipatedJuly 3, 1992
Very strong typhoon
10-minute sustained (JMA)
Highest winds165 km/h (105 mph)
Lowest pressure950 hPa (mbar); 28.05 inHg
Category 4-equivalent typhoon
1-minute sustained (SSHWS/JTWC)
Highest winds220 km/h (140 mph)
Lowest pressure922 hPa (mbar); 27.23 inHg
Overall effects
FatalitiesNone
Injuries1
DamageUnknown
Areas affectedPhilippines (primarily Luzon), Japan

Part of the 1992 Pacific typhoon season

Typhoon Bobbie, known in the Philippines as Typhoon Asiang,[1] was an intense typhoon which affected the Philippines and Japan during June 1992. The third tropical depression, storm, and first typhoon of the 1992 Pacific typhoon season, Bobbie developed from a weak area of convection in the monsoon trough. Intensifying as it underwent a binary interaction with nearby Chuck, on 25 June, Bobbie became a typhoon. Further developing as it tracked northwards, two days later, Bobbie peaked as a very strong typhoon. Soon after, Bobbie began weakening as it recurved northeastward, transitioning into an extratropical cyclone on 1 July. It was at this time when Bobbie made its closest approach to Japan, just southeast of Kyushu. The extratropical remnants of the former typhoon persevered until they dissipated on 3 July.

As the typhoon passed east of northern Luzon, torrential rains associated with Bobble and Chuck caused widespread flooding and mudslides over the northern Philippine Islands. Despite that, Bobbie primarily had a beneficial effect there. In Japan, intense winds and heavy rainfall in the prefectures of Okinawa, Kōchi, Miyazaki, Kagoshima, and Tokyo caused landslides and wave damage. However, due to preparations, no one die. As a weakening Bobbie passed near Kadena Air Base, one trailer was overturned while a woman received head injuries when she was knocked down by Bobbie's strong wind.

Meteorological history

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File:Bobbie 1992 path.png
Map plotting the storm's track and intensity, according to the Saffir–Simpson scale
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
  Extratropical cyclone, remnant low, tropical disturbance, or monsoon depression

On 20 June, a poorly organized area of convection south of Guam near the central Caroline Islands began developing. Embedded in the monsoon trough, the disturbance's circulation began consolidating, prompting the Joint Typhoon Warning Center (JTWC), an American military organization, issued a Tropical Cyclone Formation Alert (TCFA) on the disturbance.[2]

Preparations

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Public Storm Warning Signals were issued for portions of Northern Luzon, with PSWS #3 being hoisted for Cagayan and Batanes.[3] In Botolan, a town near Mount Pinatubo, officials warned residents to evacuate to higher ground due to the threat of rain-triggered mudflows. Initially, a warning to evacuate for people living near the Sacobia river was issued, however, soon after, this was upgraded, as thousands of residents living along the banks of the Sacobia, Pasig-Portrero, and Santo Tomas rivers, were on alert to evacuate.[4]

In Okinawa Island, schools were closed and bus service was cancelled prior to Bobbie making landfall there.[5] Elsewhere, in Sasebo, many scheduled hockey and soccer matches were cancelled.[6]

Impact

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Bobbie would primarily bring beneficial rainfall to Luzon, as mostly light showers had persevered over the region.[7] However, combined with the effects of nearby Chuck, heavy rainfall would produce mudflows pouring down the Bucao, Balinquero and Maraunot rivers, causing them to rise up 6 ft (1.8 m). The rains loosened many tons of debris which were produced by Pinatubo in a prior eruption, sending them pouring down river channels to impact villages around the volcano.[4] In Santa Rita, a town in Pampanga province, 80 people evacuated after lahar thundered down the Pasig-Portrero river.[3]

References

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  1. ^ Marshall, J. Lee; Nilo, Prisco D.; Servando, Nathaniel T.; Rouse, B.; Adug, E.A. (1995). Typhoon Monitoring and Trajectory Prediction in the Philippine Region using a PC-based NOAA Direct Readout System and an integrated Data Base (PDF). University of Wisconsin-Madison. p. 3.
  2. ^ 1992 Annual Tropical Cyclone Report (PDF) (Report). Guam, Mariana Islands: Joint Typhoon Warning Center. 1993. p. 52-55. Retrieved August 24, 2024.
  3. ^ a b "Typhoon Bobbie spared the main island of Luzon from..." United Press International. 27 June 1992. Retrieved 25 August 2024.
  4. ^ a b "Officials Sunday advised residents of a town near the..." United Press International. 28 June 1992. Retrieved 25 August 2024.
  5. ^ "Typhoon Slams Okinawa". United Press International. 29 June 1992. Retrieved 25 August 2024.
  6. ^ "Rugby goes on; despite typhoon". Trove. Royal Australian Navy News. 14 August 1992. Retrieved 25 August 2024.
  7. ^ Weekly Weather and Crop Bulletin. Vol. 79. The Bureau. 1992. Retrieved 25 August 2024.