A large
monsoon trough was anchored south of
Guam towards the end of July. By July 21, three areas of disturbed weather had formed. Although the westernmost disturbance dissipated, the easternmost two continued to develop, one of which would later become Typhoon Andy. A
Tropical Cyclone Formation Alert (TCFA) was issued for the easternmost system at 1900
UTC on July 21 as sea level pressures fell and convection increased within the vicinity of the disturbance. After becoming better organized, the
Japan Meteorological Agency (JMA) started monitoring the system. Later on July 22, the
Joint Typhoon Warning Center (JTWC) started monitoring the same system as it developed
rainbands and a further increase in thunderstorm activity. Initially, the JTWC correctly predicted the low to move northwest.
Hurricane Hunters indicated that the
low and mid-level centers were not vertically aligned. On July 28, the system turned northwest along the southwestern edge of the ridge. That afternoon, the JMA estimated winds of . Subsequently, Typhoon Bess entered an episode of
rapid deepening. Only a few hours later, the JMA reported that Bess had attained its peak intensity of , which it would maintain for 12 hours. At 0000 UTC on July 29, according to the JMA, the typhoon attained a minimum
barometric pressure of . Later that morning, the JTWC estimated that Bess attained its peak intensity of , a Category 5 hurricane-equivalent on the SSHWS, though JMA data suggests that Bess was weakening by this time. At this time, Typhoon Bess was located 460 km (285 mi) to the southeast of
Iwo Jima. After slowing down further, Bess curved north along the southern periphery of a weakness in the
subtropical ridge. Even though the JTWC expected Bess to recurve well east of Japan within 36 hours, this did not materialize. On July 30, the JMA lowered the intensity of the typhoon to . During the evening hours of July 31, the JMA further the intensity of the storm to . Bess continued to weaken while accelerating. The next day, August 1, the JMA downgraded Bess into a severe tropical storm. Later that morning, the JMA downgraded Bess into a tropical storm. Around this time, the tropical storm made
landfall along central
Honshu. Shortly thereafter, the JTWC reported that Bess was no longer a typhoon. On August 2, Bess merged with a
low pressure area over the
Sea of Japan. The JMA ceased monitoring the typhoon midday on August 3. ==Impact and aftermath==