Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Fire Weather Watch |
| Area(s): | Eastern Glacier/Toole/Central/Eastern Pondera/Liberty; Hill and Blaine Counties; Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front; Chouteau and Fergus Counties; Central and Eastern Lewis and Clark National Forest Areas |
| Effective: | 2026-07-23 @ 1:31 am -> 2026-07-23 @ 6:30 pm |
| Onset: | 2026-07-24 @ 11:00 am -> 2026-07-25 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-07-23 @ 1:31 am |
| Headline: | Fire Weather Watch issued July 23 at 12:31AM MDT until July 25 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
The National Weather Service in Great Falls has issued a Fire Weather Watch for hot temperatures, gusty winds, and low relative humidity, which is in effect from Friday morning through Saturday evening. * AFFECTED AREA...Eastern Glacier/Toole/Central/Eastern Pondera/Liberty, Hill and Blaine Counties, Lewis and Clark National Forest Rocky Mountain District-Rocky Mountain Front, Chouteau and Fergus Counties and Central and Eastern Lewis and Clark National Forest Areas. * WINDS...Westerly 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...As low as 10 to 15 percent. * TEMPERATURES...Mostly 90s and 100s. * THUNDERSTORMS...Isolated to widely scattered showers and thunderstorms may cause localized strong, and erratic wind gusts and lightning, mostly over zones 115 and 117 Saturday afternoon. * IMPACTS...Containment of any ongoing or new fires may be very difficult. |
| Alert: | Extreme Heat Watch |
| Area(s): | Western and Central Chouteau County; Cascade County below 5000ft; Judith Basin County and Judith Gap |
| Effective: | 2026-07-23 @ 12:53 am -> 2026-07-23 @ 6:00 pm |
| Onset: | 2026-07-24 @ 11:00 am -> 2026-07-26 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-07-23 @ 12:53 am |
| Headline: | Extreme Heat Watch issued July 22 at 11:53PM MDT until July 26 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Dangerously hot conditions with afternoon temperatures 95 to 105 degrees possible. * WHERE...Cascade County below 5000ft, Judith Basin County and Judith Gap, and Western and Central Chouteau County. * WHEN...From Friday morning through Sunday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...The most intense heat is expected Friday and Saturday. |
| Alert: | Extreme Heat Watch |
| Area(s): | Hill County; Northern Blaine County; Bears Paw Mountains and Southern Blaine; Fergus County below 4500ft |
| Effective: | 2026-07-23 @ 12:53 am -> 2026-07-23 @ 6:00 pm |
| Onset: | 2026-07-24 @ 11:00 am -> 2026-07-26 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-07-23 @ 12:53 am |
| Headline: | Extreme Heat Watch issued July 22 at 11:53PM MDT until July 26 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Dangerously hot conditions with afternoon temperatures 95 to 110 degrees possible. * WHERE...Bears Paw Mountains and Southern Blaine, Fergus County below 4500ft, Hill County, and Northern Blaine County. * WHEN...From Friday morning through Sunday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...The most intense heat is expected Friday and Saturday. |
| Alert: | Extreme Heat Watch |
| Area(s): | Musselshell; Treasure; Northern Rosebud; Custer; Fallon; Northern Stillwater; Powder River; Carter; Golden Valley; Red Lodge Foothills; Northern Big Horn; Southern Rosebud; Judith Gap; Beartooth Foothills; Southern Big Horn; Southeastern Carbon; Northern Sweet Grass; Bighorn Canyon; Northern Carbon; Melville Foothills; Northeastern Yellowstone; Southern Wheatland; Southwestern Yellowstone; Sheridan Foothills |
| Effective: | 2026-07-22 @ 11:51 pm -> 2026-07-24 @ 12:00 am |
| Onset: | 2026-07-24 @ 10:00 am -> 2026-07-26 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Billings MT on 2026-07-22 @ 11:51 pm |
| Headline: | Extreme Heat Watch issued July 22 at 10:51PM MDT until July 26 at 9:00PM MDT by NWS Billings MT |
| Description: |
* WHAT...Dangerously hot conditions with temperatures 95 to 110 possible. * WHERE...Portions of central, south central, and southeast Montana and north central Wyoming. * WHEN...From Friday morning through Sunday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. |
| Alert: | Flood Watch |
| Area(s): | Red Lodge Foothills; Paradise Valley; Livingston Area; Beartooth Foothills; Absaroka/Beartooth Mountains; Southern Big Horn; Southeastern Carbon; Bighorn Canyon; Northern Carbon; Pryor/Northern Bighorn Mountains; Northeast Bighorn Mountains; Sheridan Foothills |
| Effective: | 2026-07-22 @ 4:16 pm -> 2026-07-23 @ 3:00 am |
| Onset: | 2026-07-22 @ 4:16 pm -> 2026-07-23 @ 3:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Billings MT on 2026-07-22 @ 4:16 pm |
| Headline: | Flood Watch issued July 22 at 3:16PM MDT until July 23 at 2:00AM MDT by NWS Billings MT |
| Description: |
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 late this 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...Until 2 AM MDT Thursday. * 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 late this afternoon and evening. These storms may cause localized flash flooding. - http://www.weather.gov/safety/flood |
| Alert: | Fire Weather Watch |
| Area(s): | Dawson/McCone/Prairie/Richland/Wibaux Counties; Northern Valley and Northern Phillips Counties; The Little Rockies; The Lower Missouri River Breaks including the Charles M Russell National Wildlife Refuge; Southern Petroleum and Southern Garfield Counties |
| Effective: | 2026-07-22 @ 12:51 pm -> 2026-07-23 @ 7:00 am |
| Onset: | 2026-07-24 @ 11:00 am -> 2026-07-24 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Glasgow MT on 2026-07-22 @ 12:51 pm |
| Headline: | Fire Weather Watch issued July 22 at 11:51AM MDT until July 24 at 9:00PM MDT by NWS Glasgow MT |
| Description: |
The National Weather Service in Glasgow has issued a Fire Weather Watch, which is in effect from Friday morning through Friday evening. * AFFECTED AREA...Fire weather zones 122, 134, 135, 136, and 137. * WIND...West at 15 to 25 mph with gusts to 35 mph. * HUMIDITY...As low as 15 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
| Alert: | Extreme Heat Watch |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Western Roosevelt; Petroleum; Garfield; McCone; Richland; Dawson; Prairie; Wibaux; Northern Phillips; Southwest Phillips; Northern Valley; Eastern Roosevelt |
| Effective: | 2026-07-22 @ 11:03 am -> 2026-07-23 @ 4:00 pm |
| Onset: | 2026-07-24 @ 11:00 am -> 2026-07-26 @ 11:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Glasgow MT on 2026-07-22 @ 11:03 am |
| Headline: | Extreme Heat Watch issued July 22 at 10:03AM MDT until July 26 at 10:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Dangerously hot conditions with heat index values up to 101 possible. * WHERE...A portion of northeast Montana. * WHEN...From Friday morning through Sunday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. |