<prompt> Bhala okuqhubekayo kwalesi sigaba - Ngo-September 4, ngemva kokuthuthela ezimweni ezikahle, i-Irma yaqina yaba isiphepho esiseSigabeni 4. Njengoba yayilokhu isondela eziQhingini zaseLeeward, i-Irma yathola inkathi yesibili futhi enamandla yokuqina okusheshayo, yaba yisiphepho soHlelo 5 ngo-12: 00 UTC ngosuku olulandelayo, nemimoya engu-175 mph 280 km h. Lesi siphepho esinamandla kakhulu saqhubeka nokuqina, nemimoya ephakeme kakhulu eqhubekayo ifinyelela ku-180 mph 285 km h cishe ngo-18: 00 UTC ngoSepthemba 5. I-Irma yathola izici ezinjengendandatho ngalesi sikhathi, nesiphepho esibonisa i-CDO enkulu, elinganayo kanye nokubukeka kwesathelayithi okumangalisayo. I - Irma yaqhubeka iqina njengoba yayisondela eziQhingini ZaseLeeward ezisenyakatho. Cishe amahora ayisishiyagalombili kamuva, cishe ngo-05: 45 UTC ngoSepthemba 6, u-Irma wafika ogwini olusenyakatho yeBarbuda ngamandla amakhulu, kanti ingcindezi encane yesiphepho yayiphansi kakhulu e-Atlantic kusukela ngo-Dean  <response>: ngo-2007; isiphepho futhi safika ogwini nomoya omkhulu oqhubekayo ongu-180 mph 285 km h. I-Irma yaqhubeka nokugcina amandla ayo aphezulu kwaze kwaba ngu-12: 00 UTC ngoSepthemba 6 futhi yenza ukuqhuma komhlaba okwengeziwe ngalolo suku olufanayo, ngo-11: 15 UTC eSint Maarten, futhi ngo-16: 30 UTC eVirgin Gorda, eBritish Virgin Islands, yize ingcindezi emaphakathi yesiphepho yayikhuphuke kancane ngaphambi kokuqhuma kwayo kwesithathu. 