Betty (1987, Western North Pacific): Track, Intensity and Historical Data

Cyclone Betty formed during the 1987 Western North Pacific season, following a tracked path across the region between August 7, 1987, and August 17, 1987. Official historical records maintained by NOAA/NCEI (using International Best Track Archive for Climate Stewardship version 04r01 data) document the system's progression, intensity metrics, and coordinates over an 85-point track record evaluated by the WMO responsible agency in Tokyo.

Lifecycle and Track Summary

The system began its tracked progression on August 7, 1987, at 00:00:00 CE, located at latitude 8.4 and longitude 134.2. Over the course of 85 recorded track points, the cyclone moved across the Western North Pacific basin (subbasin MM), registering a mean track latitude of 13.41 and a mean track longitude of 121.38.

Representative geographic coordinates from the official track record illustrate the movement of the system over time:

• August 7, 1987, 00:00:00 CE: Latitude 8.4, Longitude 134.2
• August 9, 1987, 15:00:00 CE: Latitude 10.9, Longitude 131.9
• August 12, 1987, 06:00:00 CE: Latitude 12.6, Longitude 124.3
• August 14, 1987, 21:00:00 CE: Latitude 16.0, Longitude 111.3
• August 17, 1987, 12:00:00 CE: Latitude 18.8, Longitude 99.3

The final recorded track point in the main track data occurred on August 17, 1987, at 12:00:00 CE. This date marks the end of the documented historical record for the system in the dataset; it does not indicate current activity.

Intensity and Pressure Measurements

Intensity evaluations for Betty are anchored by official agency assessments from the WMO responsible agency in Tokyo. According to the dataset:

• Maximum Wind: 110.0 knots (approximately 203.7 km/h), recorded with maximum wind basis attributed to the WMO responsible agency.
• Minimum Pressure: 890.0 mb, evaluated under the minimum pressure basis of the WMO responsible agency.

The official records classify the system under parameters indicating very intense low-pressure development alongside reported sustained winds meeting high-threshold criteria.