美国国家飓风中心起初预计飓风会进一步增强,最终达到萨菲尔-辛普森飓风等级下的四级飓风标准[8]。但从索科罗岛南侧海域经过后,气旋开始因水温降低而缓慢减弱[2],风速逐渐下降,风眼增大,雷暴活动也相应消退[9]。风暴北侧的高压脊减弱,促使伊莱亚娜的前进速度放缓,并朝西北偏西转向。8月26日清晨,飓风降级成热带风暴,当晚,气旋内的对流大幅消退,于8月27日清晨进一步减弱成热带低气压[2]。8月27日晚,伊莱亚娜内部已连续约18小时没有深层对流存在[10],气象机构因此宣布伊莱亚娜已退化成大范围残留低气压区。风暴残留继续缓慢西进,最终于8月29日在下加利福尼亚半岛最南端的卡波圣卢卡斯(Cabo San Lucas)西北偏西方向约1340公里洋面逐渐消散。[2]
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^Staff Writer. Hurricane Ileana brings heavy rainfall to Mexico. Monsters and Critics. Deutsche Presse-Agentur. 2006-08-23 [2012-09-04]. (原始内容存档于2012-09-04).