美国国家气象局大瀑布城蒙大拿办公室于9月18日山地夏令时间凌晨3:21发布山洪预警,有效期至9月20日山地夏令时间午夜12:00。
* 内容摘要……由于降雨量过大,马格里奇(Horse Gulch)地区及2026年夏季火烧迹地区域有可能发生山洪暴发和泥石流。 * 影响范围……中南部和西南部部分地区……
* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over the Horse Gulch area and burn scars from the summer of 2026.
* WHERE...Portions of central and southwest Montana, including the following areas, in central Montana, Big Belt, Bridger and Castle Mountains, Elkhorn and Boulder Mountains and Little Belt and Highwood Mountains. In southwest Montana, Gallatin Valley.
* WHEN...From this evening through Saturday evening.
* IMPACTS...Heavy rainfall over the Horse Gulch and Burn Scars of 2026 is expected up to and during the period of the watch. Residents near he Horse Gulch area and burn scars from the summer of 2026 should prepare for potential debris flow. Be sure to stay up to date with information from local authorities. Heavy rainfall could trigger flash flooding of low-lying areas, urbanized street flooding, and debris flows in and near recent wildfire burn scars.
* ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall over recent burn scars, which may lead to flash flooding and debris flows. - Some locations that may experience flash flooding include... Areas near recent burn scars from the summer 2026 and the Horse Gulch area. - http://www.weather.gov/safety/flood
Affected area: Little Belt and Highwood Mountains; Big Belt, Bridger and Castle Mountains; Elkhorn and Boulder Mountains; Gallatin Valley