<prompt> Nyora kupfuurira kweiyi ndima - Musi waSeptember 4, pashure pokufamba mumamiriro ezvinhu akanaka zvikuru, Irma akasimba kuva dutu reChikamu 4. Sezvairamba ichiswedera pedyo neLeeward Islands, Irma yakawana nguva yechipiri uye yakasimba yekukurumidza kukurumidza, ichiva dutu reCategory 5 na12: 00 UTC pazuva rakatevera, nemhepo dze 175 mph 280 km h. Dutu rine simba zvikuru rakaramba richipfuurira, nemhepo yakasimba inopfuurira kusvika 180 mph 285 kmh pedyo na 18:00 UTC musi waSeptember 5. Irma yakawana mavara emhete panguva ino, nedutu rinoratidza hombe, symmetrical CDO uye inonakidza satellite chitarisiko. Irma yakaramba ichikura sezvaaiswedera pedyo neNorthern Leeward Islands. Anenge maawa masere gare gare, panenge pa05:45 UTC musi waGunyana 6, Irma yakasvika kumahombekombe ekuchamhembe kweBarbuda pakakwirira, nedutu remhepo yakaderera yakadzika pa iyi yaive yakaderera muAtlantic kubvira Dean  <response>: muna 2007; dutu racho rakasvikawo kumhenderekedzo yegungwa nemhepo yakasimba ye180 mph 285 kmh. Irma akaramba achichengetedza simba rake kusvika na12:00 UTC musi wa6 Gunyana uye akaita mamwe mafambiro anotevedzana pazuva rimwe chetero, na11:15 UTC paSint Maarten, uye na16:30 UTC paVirgin Gorda, muBritish Virgin Islands, kunyangwe hazvo kumanikidzwa kwepakati kwedutu kwakanga kwasimuka zvishoma pamberi pekupinda kwayo kwechitatu. 