Yellowstone National Park, Wyoming
Regional Weather Alerts
| 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: | 2026-07-23 @ 5:09 am -> 2026-07-23 @ 6:00 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 2026-07-23 @ 5:09 am |
| Headline: | Extreme Heat Watch issued July 23 at 4:09AM MDT until July 26 at 10:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Dangerously hot conditions with highs up to 108 possible. * WHERE...Most of northeast Montana. * WHEN...From Friday morning through Sunday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. |
| 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: | 2026-07-23 @ 5:02 am -> 2026-07-23 @ 6:00 pm |
| 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 2026-07-23 @ 5:02 am |
| Headline: | Fire Weather Watch issued July 23 at 4:02AM MDT until July 24 at 9:00PM MDT by NWS Glasgow MT |
| Description: |
* 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): | 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: | 2026-07-23 @ 3:37 am -> 2026-07-24 @ 3:45 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 2026-07-23 @ 3:37 am |
| Headline: | Extreme Heat Watch issued July 23 at 2:37AM 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: | 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. |