Montana

Gallatin County

Flood Watch issued July 21 at 12:59PM MDT until July 23 at 6:00AM MDT by NWS Riverton WY

12:59 PM — July 22nd, 8:00 AM

* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Portions of central, north central, northwest, south central, southwest, and west central Wyoming, including the following areas, in central Wyoming, Casper Mountain, Green Mountains and Rattlesnake Range, Lander Foothills, Natrona County Lower Elevations, Owl Creek and Bridger Mountains, Southwest Bighorn Basin, Upper Wind River Basin, Wind River Basin, Wind River Mountains East and Wind River Mountains West. In north central Wyoming, Bighorn Mountains Southeast, Bighorn Mountains West, Northeast Johnson County, Southeast Bighorn Basin and Southeast Johnson County. In northwest Wyoming, Absaroka Mountains, Cody Foothills, Jackson Hole, North Bighorn Basin, Teton and Gros Ventre Mountains and Yellowstone National Park. In south central Wyoming, East Sweetwater County, Flaming Gorge and Rock Springs and Green River. In southwest Wyoming, South Lincoln County. In west central Wyoming, Salt River and Wyoming Ranges, Star Valley, Upper Green River Basin and Upper Green River Basin Foothills. * WHEN...Until late Wednesday night. The most likely period of possible flooding is Wednesday afternoon through Wednesday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Slow moving showers and thunderstorms and abnormally high moisture in the air can bring locally heavy rainfall that could lead to flooding. - http://www.weather.gov/safety/flood

Flood Watch issued July 21 at 12:43PM MDT until July 22 at 9:00PM MDT by NWS Pocatello ID

12:43 PM — July 22nd, 6:00 AM

* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of eastern and southeast Idaho, including the following areas, in eastern Idaho, Big Hole Mountains, Centennial Mountains - Island Park and Teton Valley. In southeast Idaho, Bear Lake Valley, Bear River Range, Blackfoot Mountains, Caribou Range, Franklin/Eastern Oneida Region and Marsh and Arbon Highlands. * WHEN...From Wednesday afternoon through Wednesday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - An abnormally moist airmass will overspread eastern Idaho later tonight and continue into the day tomorrow. Thunderstorms are expected to be efficient rainfall producers and flash flooding will be possible across the watch area. - http://www.weather.gov/safety/flood

Flood Watch issued July 21 at 12:11PM MDT until July 23 at 12:00AM MDT by NWS Great Falls MT

12:11 PM — 8:15 PM

* WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...A portion of southwest Montana, including the following areas, Gallatin and Madison County Mountains and Centennial Mountains, Northwest Beaverhead County and Ruby Mountains and Southern Beaverhead Mountains. * WHEN...From Wednesday afternoon through Wednesday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Slow moving thunderstorms capable of producing heavy rain are expected Wednesday afternoon and evening. - http://www.weather.gov/safety/flood

Flood Watch issued July 21 at 9:03AM MDT until July 23 at 2:00AM MDT by NWS Billings MT

9:03 AM — July 22nd, 9:15 AM

The combination of a moist and unstable air mass with slow moving thunderstorms capable of producing very heavy rain, will bring a risk of flash flooding Wednesday afternoon and evening. * WHAT...Flash flooding caused by excessive rainfall is possible. * WHERE...Portions of south central Montana, including the following areas, Absaroka/Beartooth Mountains, Beartooth Foothills, Bighorn Canyon, Livingston Area, Northern Carbon, Paradise Valley, Pryor/Northern Bighorn Mountains, Red Lodge Foothills, Southeastern Carbon and Southern Big Horn and north central Wyoming, including the following areas, Northeast Bighorn Mountains and Sheridan Foothills. * WHEN...From Wednesday afternoon through late Wednesday night. * IMPACTS...Excessive runoff may result in flooding of rivers, streams, and other low-lying and flood-prone locations. Recent burn scars, including the Robertson Draw and East Side south of Red Lodge, and the Elk along the eastern slopes of the Bighorn Mountains, are at risk of experiencing flash flooding and debris flows. * ADDITIONAL DETAILS... - Thunderstorms capable of producing very heavy rain are expected Wednesday afternoon and evening. These storms may cause localized flash flooding. - http://www.weather.gov/safety/flood

Flood Advisory issued July 21 at 7:22PM MDT until July 21 at 9:15PM MDT by NWS Pocatello ID

7:22 PM — 9:15 PM

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...East Central Fremont County in southeastern Idaho... * WHEN...Until 915 PM MDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. * ADDITIONAL DETAILS... - At 722 PM MDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 0.5 and 1 inch of rain has fallen. - Some locations that will experience flooding include... Last Chance, Ponds Lodge, Ashton Reservoir, Island Park Reservoir, Warm River, Mesa Falls State Park, Ashton Hill and Harriman State Park. - http://www.weather.gov/safety/flood

Flood Advisory issued July 21 at 5:49PM MDT until July 21 at 8:45PM MDT by NWS Riverton WY

5:49 PM — 8:45 PM

* WHAT...Flooding caused by excessive rainfall is expected. * WHERE...West Central Teton County in northwestern Wyoming along the Idaho border... * WHEN...Until 845 PM MDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Rises in small streams. * ADDITIONAL DETAILS... - At 545 PM MDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. Between 0.5 and 1 inch of rain has fallen. - This includes the following streams and drainages... Darby Creek, Moose Creek, North Fork Game Creek, Teton Creek, Kiln Creek and South Fork Game Creek. - Some locations that will experience flooding include... Alta, Teton Canyon and other drainages on the west side of the Tetons. - http://www.weather.gov/safety/flood