On October 6, 1974, the
Joint Typhoon Warning Center (JTWC) began monitoring a tropical disturbance several hundred miles southeast of
Guam. Tracking quickly westward to west-northwestward in response to a strong
subtropical ridge to the north, the system gradually organized, passing near
Ulithi atoll on October 7. Accompanied by a broad
monsoonal flow, the disturbance featured multiple
centers of circulation. On October 8, it developed into a tropical depression and soon into a tropical storm, at which time it was assigned the name
Bess. Early on October 9, an
aircraft reconnaissance mission into Bess revealed that a new dominant center of circulation had developed to the north of the original low. The southern low soon dissipated as the northern one became a tropical storm. The northern system retained the name Bess and is considered the same storm by the JTWC. After the northern circulation became the dominant center on October 9, a deepening
trough in the
westerlies caused a decrease in
synoptic pressures, resulting in Bess' forward motion greatly decreasing. Later that day, Bess made
landfall in northern
Luzon, roughly south of
Escarpada Point, with winds estimated at . Though classified a minimal typhoon by the JTWC, Inland, a
barometric pressure of 976.9
mbar (
hPa; 28.85
inHg) was recorded in
Tuguegarao as the typhoon passed to the north. Due to the interaction with the high terrain of northern Luzon, Bess temporarily weakened to a tropical storm before regaining typhoon strength over the
South China Sea during the afternoon of October 11. As the storm emerged back over water, satellite images revealed a relatively large system with clouds spanning an area in diameter. Upon reintensifying, Bess turned due west in response to a dominating
high-pressure area over Southern China. With a large difference in pressures between the two systems, a strong northeasterly flow developed between them. This resulted in gale-force winds occurring up to from Bess's center. During the evening of October 12, the combined effects of a winter monsoon and entrainment of cool, dry air from mainland China began to weaken the system. By the following morning, Bess had weakened to tropical storm as it passed south of
Hong Kong. The system later struck
Hainan Island with winds of before lessening to a tropical depression. The dissipating system emerged over the
Gulf of Tonkin on October 14 and ultimately dissipated as it began moving ashore in northern
Vietnam later that day. ==Impact==