Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Special Weather Statement |
| Area(s): | Central and Southern Valley; Garfield; McCone |
| Effective: | 2026-07-30 @ 5:03 am -> 2026-07-30 @ 6:00 am |
| Onset: | 2026-07-30 @ 5:03 am |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-07-30 @ 5:03 am |
| Headline: | Special Weather Statement issued July 30 at 4:03AM MDT by NWS Glasgow MT |
| Description: |
At 402 AM MDT, Doppler radar was tracking a strong thunderstorm near The Pines Rec Area, or 29 miles south of Glasgow, moving east at 20 mph. HAZARD...Winds in excess of 40 mph and penny size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Fort Peck, The Pines Rec Area, Fort Peck Marina, Duck Creek Rec Area, Rock Creek Rec Area, Haxby, and Park Grove. |
| 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; Lincoln Ranger District of the Helena National Forest; Central and Eastern Lewis and Clark National Forest Areas; Helena and Townsend Ranger Districts of the Helena National Forest |
| Effective: | 2026-07-30 @ 1:37 am -> 2026-07-30 @ 4:45 pm |
| Onset: | 2026-08-01 @ 3:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-07-30 @ 1:37 am |
| Headline: | Fire Weather Watch issued July 30 at 12:37AM MDT until August 2 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* 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, Lincoln Ranger District of the Helena National Forest, Central and Eastern Lewis and Clark National Forest Areas and Helena and Townsend Ranger Districts of the Helena National Forest. * WINDS...West 15 to 25 mph, with gusts up to 50 mph. Along the Rocky Mountain Front, west winds 30 to 40 mph with gusts up to 60 mph and isolated cases of 75 mph. * RELATIVE HUMIDITY...As low as 8 percent. * TEMPERATURES...Up to 110 degrees on Saturday. * COLD FRONT...A strong, dry cold front will arrive Saturday evening. * IMPACTS...Any fires that develop will spread rapidly. Containment of any ongoing or new fires may be very difficult. Outdoor burning is not recommended. |
| Alert: | Extreme Heat Watch |
| Area(s): | Eastern Pondera and Eastern Teton; Cascade County below 5000ft; Judith Basin County and Judith Gap |
| Effective: | 2026-07-30 @ 1:16 am -> 2026-07-30 @ 7:15 pm |
| Onset: | 2026-08-01 @ 1:00 pm -> 2026-08-02 @ 4:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-07-30 @ 1:16 am |
| Headline: | Extreme Heat Watch issued July 30 at 12:16AM MDT until August 2 at 3:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Dangerously hot conditions. High temperatures between 100 to 105 degrees are possible. * WHERE...Cascade County below 5000ft, Eastern Pondera and Eastern Teton, and Judith Basin County and Judith Gap. * WHEN...From Saturday afternoon through late Saturday night. * IMPACTS...Heat related illnesses increase significantly during extreme heat. |
| Alert: | Extreme Heat Watch |
| Area(s): | Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine; Fergus County below 4500ft |
| Effective: | 2026-07-30 @ 1:16 am -> 2026-07-30 @ 7:15 pm |
| Onset: | 2026-08-01 @ 1:00 pm -> 2026-08-02 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-07-30 @ 1:16 am |
| Headline: | Extreme Heat Watch issued July 30 at 12:16AM MDT until August 2 at 12:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Dangerously hot conditions. High temperatures on Saturday between 100 to 110 degrees, with overnight lows Saturday night between 70 to 75 degrees are possible. * WHERE...Bears Paw Mountains and Southern Blaine, Fergus County below 4500ft, and Western and Central Chouteau County. * WHEN...From Saturday afternoon through Sunday morning. * IMPACTS...Heat related illnesses increase significantly during extreme heat. |
| Alert: | High Wind Watch |
| Area(s): | East Glacier Park Region; Northern High Plains; Eastern Glacier, Western Toole, and Central Pondera |
| Effective: | 2026-07-30 @ 1:16 am -> 2026-07-30 @ 7:15 pm |
| Onset: | 2026-08-01 @ 10:00 pm -> 2026-08-02 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-07-30 @ 1:16 am |
| Headline: | High Wind Watch issued July 30 at 12:16AM MDT until August 2 at 12:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...West winds 30 to 40 mph, with gusts up to 60 mph possible. Isolated wind gusts up to 75 mph along the immediate eastern slopes of the Rocky Mountain Front. * WHERE...East Glacier Park Region, Northern High Plains, and Eastern Glacier, Western Toole, and Central Pondera Counties. * WHEN...From Saturday evening through Sunday morning. * IMPACTS...Travel could be difficult, especially for high profile vehicles. Recreationists should be aware of any trees that could fall while establishing camps or hiking. * ADDITIONAL DETAILS...The most intense winds are likely to occur between 12 AM and 8 AM Sunday when mountain activity will be at its peak. |
| Alert: | Extreme Heat Watch |
| Area(s): | Musselshell; Treasure; Northern Rosebud; Custer; Fallon; Northern Stillwater; Powder River; Carter; Northern Park; Golden Valley; Red Lodge Foothills; Northern Big Horn; Southern Rosebud; Judith Gap; Paradise Valley; Livingston Area; 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: | 2026-07-30 @ 12:40 am -> 2026-07-31 @ 12:45 am |
| Onset: | 2026-08-01 @ 1:00 pm -> 2026-08-02 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Billings MT on 2026-07-30 @ 12:40 am |
| Headline: | Extreme Heat Watch issued July 29 at 11:40PM MDT until August 2 at 12:00AM MDT by NWS Billings MT |
| Description: |
* WHAT...Dangerously hot conditions with high temperatures of 100 to 108 expected. * WHERE...Portions of central, south central, and southeast Montana and north central Wyoming. * WHEN...From Saturday afternoon through Saturday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. Please protect yourself from the heat. |
| Alert: | Extreme Heat Watch |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; Northern Phillips; Southwest Phillips; Northern Valley |
| Effective: | 2026-07-29 @ 11:59 pm -> 2026-07-30 @ 6:00 pm |
| Onset: | 2026-08-01 @ 1:00 pm -> 2026-08-02 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Glasgow MT on 2026-07-29 @ 11:59 pm |
| Headline: | Extreme Heat Watch issued July 29 at 10:59PM MDT until August 2 at 12:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Dangerously hot conditions with heat index values up to 110 possible. * WHERE...Central and Southeast Phillips, Central and Southern Valley, Garfield, Northern Phillips, Northern Valley, Petroleum, and Southwest Phillips Counties. * WHEN...From Saturday afternoon through Sunday morning. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. |
| Alert: | Extreme Heat Watch |
| Area(s): | Daniels; Sheridan; Western Roosevelt; McCone; Richland; Dawson; Prairie; Wibaux; Eastern Roosevelt |
| Effective: | 2026-07-29 @ 11:59 pm -> 2026-07-30 @ 6:00 pm |
| Onset: | 2026-08-01 @ 1:00 pm -> 2026-08-02 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Future |
| Issued By: | NWS Glasgow MT on 2026-07-29 @ 11:59 pm |
| Headline: | Extreme Heat Watch issued July 29 at 10:59PM MDT until August 2 at 6:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Dangerously hot conditions with heat index values up to 105 possible. * WHERE...Daniels, Dawson, Eastern Roosevelt, McCone, Prairie, Richland, Sheridan, Western Roosevelt, and Wibaux Counties. * WHEN...From Saturday afternoon through Sunday afternoon. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. |
| Alert: | Fire Weather Watch |
| Area(s): | Kootenai National Forest/Talley Lake District/fnf; Flathead National Forest/Glacier Park/Bob Marshall And Mission Mountain Wilderness; Western Lolo National Forest; Salish and Kootenai Indian Reservation; Eastern Lolo National Forest/Welcome Creek And Scapegoat Wildernesses; Bitterroot National Forest |
| Effective: | 2026-07-29 @ 9:45 am -> 2026-07-31 @ 1:15 pm |
| Onset: | 2026-08-01 @ 3:00 pm -> 2026-08-02 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2026-07-29 @ 9:45 am |
| Headline: | Fire Weather Watch issued July 29 at 8:45AM MDT until August 2 at 12:00AM MDT by NWS Missoula MT |
| Description: |
...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS CANYON AND CLEARWATER/NEZ PERCE... ...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SATURDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR A PORTION OF MT... ...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD AND EAST BEAVERHEAD... ... .A dry cold front on Saturday will bring critical fire weather conditions to the region. The National Weather Service in Missoula MT has issued a Fire Weather Watch. * AFFECTED AREA...Fire Weather Zones 104, 105, 106, 107, 108, and 109 in Northwest and west-central Montana. * TIMING...From Saturday afternoon through Saturday evening. * WINDS...West winds 10 to 25 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...Relative Humidity between 15 to 25 percent. * Winds remain elevated in Fire Weather Zone 105 into late Saturday night and early Sunday morning but relative humidities will recover into the 40 and 50% range above valley floors. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |
| Alert: | Fire Weather Watch |
| Area(s): | Deerlodge/Western Beaverhead National Forest; Eastern Beaverhead National Forest |
| Effective: | 2026-07-29 @ 9:45 am -> 2026-07-31 @ 1:15 pm |
| Onset: | 2026-08-01 @ 3:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2026-07-29 @ 9:45 am |
| Headline: | Fire Weather Watch issued July 29 at 8:45AM MDT until August 2 at 9:00PM MDT by NWS Missoula MT |
| Description: |
...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY MORNING THROUGH SATURDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS CANYON AND CLEARWATER/NEZ PERCE... ...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SATURDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR A PORTION OF MT... ...FIRE WEATHER WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH SUNDAY EVENING DUE TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD AND EAST BEAVERHEAD... ... .A dry cold front on Saturday will bring critical fire weather conditions to the region. The National Weather Service in Missoula MT has issued a Fire Weather Watch. * AFFECTED AREA...Fire Weather Zones 110 and 111 in southwest Montana. * TIMING...From Saturday afternoon through Sunday evening. * WINDS...West winds 15 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...Relative Humidity between 5 to 20 percent. * Late Saturday night into Sunday morning, winds decrease to 5-15 mph with gusts up to 25 mph especially in higher terrain. Relative humidities recover into the 40% range above valley floors. Wind speeds increase and relative humidities drop again to critical thresholds by Sunday afternoon. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |