洪水警报于9月18日美国山地时间上午2:52发布，有效期至9月18日美国山地时间晚上10:00，由美国国家气象局波卡特洛分局发布。
* 内容……在Big Rock烧伤区域，强降雨可能引发山洪暴发和泥石流。 * 地点……爱达荷州东南部部分地区，包括以下区域：上蛇河……
* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over the Big Rock burn scar.
* WHERE...A portion of southeast Idaho, including the following area, Upper Snake River Plain.
* WHEN...Through this evening.
* IMPACTS...Heavy rainfall over the Big Rock burn scar is expected during the period of the watch. Anyone in or near the Big Rock burn scar should prepare for potential debris flow moving through the Big Rock burn scar. Be sure to stay up to date with information from local authorities. Heavy rainfall could trigger flash flooding and debris flows in and near recent wildfire burn scars.
* ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall over the Big Rock burn scar, which may lead to flash flooding and debris flows. - Some locations that may experience flash flooding include... Heise. - http://www.weather.gov/safety/flood
Affected area: Upper Snake River Plain