On July 23, both the JMA and JTWC upped the depression into a tropical storm. Bess then began to intensify. At 0600 UTC on July 24, Bess was upgraded to a severe tropical storm by the JMA.
Bess's trajectory took a significant turn on July 23, as both the JMA and JTWC upgraded it to a tropical storm. By July 24 morning, at 0600 UTC, Bess had reached severe tropical storm status under the JMA's evaluation.