<prompt> Pedzisa mutsara unotevera: Irma yakasimbiswazve kuva dutu reChikamu 3 na12: 00 UTC musi waGunyana 3 sezvo yakafamba yakananga kumaodzanyemba kwakadziva kumadokero pasi pesimba remupendero. Kutanga mangwanani-ngwanani ezuva rakatevera racho, ziso racho rakatanga kukura uye kuva nechitarisiko chiri nani, nepo kuyerera kwakadzika kwakanga kwakapoteredza ziso racho kwakava kwakaenzana zvikuru. Mukuwedzera, dutu racho rakaenda kunzvimbo dzapasi pegungwa dzinotonhora sezvarakasvika kuLeeward Islands. Somugumisiro, Irma akapfuura neimwe nguva yekukurumidza kukurumidza, achisvika Chikamu 4 simba pa 18:00 UTC musi waGunyana 4 uye Chikamu 5 chimiro pa 12:00 UTC musi waGunyana 5. Dutu rine simba zvikuru rakakura kukura uye rakava rakaringana zvikuru, richiwana mavara eringi, nemisvortices ichicherechedzwa mukati meziso rakanyatsotsanangurwa, zvichiratidza kuenderera mberi kwekusimba kwedutu. Mhepo dzakasimba dzakasvika 180 mph 285 kmh pedyo na 18:00 UTC musi waGunyana 5 kunyange zvazvo yakashanda yakaongororwa pa 185 mph 295 kmh. Mangwanani musi waGunyana 6, dutu rakasvika pakumanikidzwa kwaro kushoma kwebarometric nguva pfupi isati yasvika 06:00 UTC, fungidziro yakavakirwa pakucherechedzwa kwekumanikidza kwepamusoro uye kuyerwa kubva kuBarbuda neSaint Barthélemy. Uku ndiko kwaiva kumanikidzwa kwakaderera zvikuru kwepasi muAtlantic kubvira  <response>: Dean muna 2007. 