Mezue ahịrịokwu na-esonụ: Na September 4, mgbe Irma mesịrị banye n'ọnọdụ ndị ka mma, ọ ghọrọ oké ifufe nke Òtù nke Anọ. Ka ọ gara n'ihu na-abịaru nso na agwaetiti Leeward, Irma gafere oge nke abụọ na nke siri ike nke ịbawanye ngwa ngwa, na-aghọ oke ifufe nke 5 site na 12:00 UTC na ụbọchị na-esote, na ifufe nke 175 mph (280 km / h). Oké ifufe ahụ siri ike nọgidere na-esiwanye ike, na oke ifufe na-aga n'ihu na 180 mph (285 km/h) na nso 18:00 UTC na Septemba 5. Irma nwetara njiri mara gburugburu oge a, na oke mmiri ozuzo na-egosipụta nnukwu, symmetric CDO na ihe ngosi satịlaịtị dị egwu. Irma nọgidere na-esiwanye ike ka ọ na-eru nso n'Agwaetiti Leeward ndị dị n'ebe ugwu. Ihe fọrọ nke nta ka ọ bụrụ awa asatọ ka e mesịrị, ihe dị ka elekere 05:45 UTC na Septemba 6, Irma rutere n'ụsọ oké osimiri dị n'ebe ugwu nke Barbuda na oke ike, ebe nrụgide kacha nta nke oké ifufe ahụ dara na <unk> nke a bụ nke kachasị ala na Atlantic kemgbe
Dean n'afọ 2007; oke ifufe ahụ mekwara ka ikuku nke 180 mph (285 km/h). Irma gara n'ihu na-ejigide oke ike ya ruo elekere 12:00 UTC na Septemba 6 wee mee ka ndị ọzọ na-aga n'ihu na-aga n'ihu n'otu ụbọchị ahụ, na 11:15 UTC na Sint Maarten, na 16:30 UTC na Virgin Gorda, na British Virgin Islands, ọ bụ ezie na nrụgide dị n'etiti oke ifufe ahụ arịgoro ntakịrị tupu ọbịbịa nke atọ ya.