A lokaci guda, duk da haka, rahotannin jirgin ruwa guda biyu sun nuna cewa Yahaya ya ci gaba da iskar iskar da ta kai aƙalla knots 55 (100 km / h, 65 mph), wanda ya fi ƙarfin ƙarfin shawara na knots 35 (65 km / h, 40 mph). Yahaya zai ci gaba da sake ƙarfafawa zuwa cikin ƙaƙƙarfan Category 1 bayan ya sake shiga tsakiyar Arewacin Pacific, yana ƙalubalantar duk tsinkayen JTWC. Bayan sake nazari daga baya, JTWC ya ɗaga ƙididdigar saurin iska na Yahaya ga kowane mai ba da shawara daga 1200 UTC Satumba 1 zuwa shawarwarinsa na ƙarshe daidai mako guda daga baya ta aƙalla knots 5 km (9 km / h, 6 mph) kuma har zuwa knots 25 (46 km / h, 29 mph). Tambaya: Nawa ne knots 55 a kowace awa?
65 mph da sa'a