<prompt> Bhala ukuqhubeka kwalesi sigaba - U-Irma waphinde waqina waba yisiphepho soHlelo 3 ngo-12: 00 UTC ngoSepthemba 3 njengoba wayehamba eningizimu-ntshonalanga ngaphansi kwethonya lomhlathi. Ekuqaleni kosuku olulandelayo, iso laqala ukukhula ngobukhulu futhi libukeka kangcono, kuyilapho ukuzungeza okujulile okuzungeze iso kwaba okufana ncamashí. Ngaphezu kwalokho, lesi siphepho sabhekisa amabombo emazingeni okushisa aphakeme olwandle njengoba sasisondela eziQhingini ZaseLeeward. Ngenxa yalokho, i-Irma yabhekana nesinye isikhathi sokuqina okusheshayo, yafinyelela ku-Category 4 ngamandla ngo-18: 00 UTC ngoSepthemba 4 kanye nesimo se-Category 5 ngo-12: 00 UTC ngoSepthemba 5. Lesi siphepho esinamandla kakhulu sakhula ngobukhulu futhi saba nokulingana okwandayo, sathola izici ezinjengendandatho, lapho kubhekwa khona ama-mesovortices ngaphakathi kweso elichazwe kahle, okukhombisa ukuqina okuqhubekayo kwesiphepho. Imimoya eqhubekayo ifinyelele ku-180 mph 285 km h eduze kuka-18: 00 UTC ngoSepthemba 5 yize ihlolwe ngokusebenza ku-185 mph 295 km h. Ekuseni ngoSepthemba 6, isiphepho safinyelela ingcindezi yaso ephansi ye-barometric ngaphambi nje kuka-06:00 UTC, isilinganiso esisekelwe ekuboneni kwengcindezi ye-dropsonde nokulinganisa okuvela eBarbuda naseSaint Barthélemy. Lokhu kwaba ingcindezi ephansi kunawo wonke e-Atlantic kusukela uDean  <response>: ngowezi-2007. 