Rain, Snow – Now Montana Has Flooding Issues on Monday

With significant amounts of rain, slush, and snow falling in many counties of southern Montana - Flooding of creeks, streams, and rivers is now an issue for Monday.

• For South Central Montana: A FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY EVENING.
• WHAT...Flooding caused by rain and snowmelt continues to be possible, but the threat of higher end impacts has decreased.
• WHERE...Portions of south central Montana, including the following areas, Bighorn Canyon, Pryor/Northern Bighorn Mountains and Southern Big Horn and north central Wyoming, including the following areas, Northeast Bighorn Mountains and Sheridan Foothills.
• WHEN...Through Monday evening.
• IMPACTS...Excessive runoff may result in flooding of streams and other low-lying and flood-prone locations close to the foothills.
• Some higher foothills roads may become impassable.
• Any heavy rainfall over the Elk burn area could result in Flash Flooding and Debris Flows.
• ADDITIONAL DETAILS...Heavy rainfall fell just off the snowpack last evening with half an inch to an inch of precipitation reported along the I-90 corridor.
• Temperatures are beginning to cool over the higher terrain turning rain to snow over the higher foothills.
• This will limit the higher end impact potential that was previously anticipated.
• However, there remains the threat of at least minor flooding in the foothills due to heavy rain that fell earlier tonight combined with continued light to moderate rainfall that is forecast through this morning.

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• For the Livingston area/Absaroka/Beartooth Mountains, Beartooth Foothills, Crazy Mountains: A FLOOD WATCH REMAINS IN EFFECT THROUGH MONDAY AFTERNOON.
• WHAT...Flooding caused by rain and snowmelt continues to be possible, but the threat of higher end impacts has decreased.
• WHERE...A portion of south central Montana, including the following areas, Absaroka/Beartooth Mountains, Beartooth Foothills, Crazy Mountains, Livingston Area, Melville Foothills, Northern Carbon, Northern Park, Northern Stillwater, Northern Sweet Grass, Paradise Valley, Red Lodge Foothills and Southeastern Carbon.
• WHEN...Through Monday afternoon.
• IMPACTS...Excessive runoff may result in flooding of streams and other low-lying and flood-prone locations close to the foothills.
• Some roads may become impassable.
• Any heavy rainfall over the American Fork or Robertson Draw burn areas could result in Flash Flooding and Debris Flows.
• ADDITIONAL DETAILS...Heavy rainfall fell just off the snowpack last afternoon and evening.
• Temperatures are beginning to cool over the higher terrain turning rain to snow over the higher foothills.
• This will limit the higher end impact potential that was previously anticipated.
• However, there remains the threat of at least minor flooding in the foothills due to heavy rain that fell earlier tonight combined with continued light to moderate rainfall that is forecast through this morning.
• Several stream gages are rising rapidly north of Red Lodge due to this runoff. A gauge near Fishtail reported around 3 inches of rain so far.