Fujiwhara effect
On August 26, the Central Weather Bureau issued a sea warning as they were no longer expecting a Fujiwhara effect, which could possibly pull Nanmadol away from Taiwan. Nanmadol was anticipated to brush Taiwan's eastern coast. All ships passing through the Bashi Channel were warned to stay updated about the typhoon. Also, Taiwanese residents were warned about possible heavy rains and strong winds from Monday, 29 August.