On July 11, a low-pressure zone formed near the Mariana Islands, and the United States Naval Research Laboratory began tracking the system.

[citation needed] At 8 pm, the Joint Typhoon Warning Center gave the system a low chance for tropical cyclogenesis.

On the morning of July 15, the JMA issued a gale warning, and the Central Weather Bureau (CWB) of Taiwan upgraded it to a tropical depression.

[citation needed] The weakening trend also accelerated on July 20 due to the drop in sea surface temperatures to 23 °C (73 °F) near landfall.

[1] At 12:45 UTC on July 21, Danas transitioned into an extratropical low in the Sea of Japan, and the JMA issued their final advisory on the storm.