Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Red Flag Warning |
| Area(s): | Sioux Ranger District Custer National Forest |
| Effective: | 2026-08-01 @ 3:44 pm -> 2026-08-02 @ 3:45 pm |
| Onset: | 2026-08-02 @ 1:00 am -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-08-01 @ 3:44 pm |
| Headline: | Red Flag Warning issued August 1 at 2:44PM MDT until August 2 at 9:00PM MDT by NWS Billings MT |
| Description: |
The National Weather Service in Billings has issued a Red Flag Warning...which is in effect from midnight tonight to 9 PM MDT Sunday. * IMPACTS: Low humidities, hot temperatures, gusty winds, and a wind shift with a cold front will create erratic fire behavior. * AFFECTED AREA: In Southeast MT and Northwest SD Fire Zone...133. * COUNTIES AFFECTED: In Northwest SD...Harding. In Southeast MT...Carter...Fallon. * COLD FRONT: A cold front moves through early Sunday morning shifting winds to the northwest and increasing wind speeds. * WIND: Southeast 10 to 20 mph with gusts up to 30 mph tonight becoming northwest 15 to 25 mph with gusts up to 35 mph along and behind the front Sunday morning. * HUMIDITY: 25 to 40 percent Sunday morning becoming as low as 10 percent by Sunday afternoon. * TEMPERATURES: High temperatures of 90 to 100 degrees on Sunday. |
| Alert: | Red Flag Warning |
| Area(s): | Crow Indian Reservation/Big Horn Canyon Rec Area; Northern Rosebud/Northern Treasure Counties; Northern Cheyenne Indian Reservation/Ashland Ranger District Custer Natl Forest; Custer County; Sheridan County/Casper BLM; Bighorn National Forest |
| Effective: | 2026-08-01 @ 3:44 pm -> 2026-08-02 @ 3:45 pm |
| Onset: | 2026-08-02 @ 1:00 am -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-08-01 @ 3:44 pm |
| Headline: | Red Flag Warning issued August 1 at 2:44PM MDT until August 2 at 9:00PM MDT by NWS Billings MT |
| Description: |
* IMPACTS: Low humidities, hot temperatures, gusty winds, and a wind shift with a cold front will create erratic fire behavior. * AFFECTED AREA: In North Central WY Fire Zones...274...284. In South Central MT Fire Zone...129. In Southeast MT Fire Zones...130...131...132. * COUNTIES AFFECTED: In North Central WY...Big Horn...Johnson...Sheridan...Washakie. In South Central MT...Big Horn...Carbon...Yellowstone. In Southeast MT...Custer...Powder River...Rosebud...Treasure. * COLD FRONT: A cold front moves through tonight into early Sunday morning shifting winds to the northwest and increasing wind speeds. * WIND: South 10 to 20 mph ahead of the front becoming northwest 10 to 20 mph with gusts up to 35 mph along and behind the front. Winds become northeast to east Sunday afternoon. * HUMIDITY: 20 to 35 percent Sunday morning becoming as low as 10 percent Sunday afternoon. * TEMPERATURES: Up to 100 degrees. |
| Alert: | Red Flag Warning |
| Area(s): | Gallatin National Forest; Wheatland County/Sweet Grass County; Stillwater County; Beartooth Ranger District Custer National Forest; Golden Valley County/Musselshell County; Yellowstone County |
| Effective: | 2026-08-01 @ 3:44 pm -> 2026-08-02 @ 3:45 pm |
| Onset: | 2026-08-01 @ 3:44 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-08-01 @ 3:44 pm |
| Headline: | Red Flag Warning issued August 1 at 2:44PM MDT until August 2 at 9:00PM MDT by NWS Billings MT |
| Description: |
* IMPACTS: Low humidities, hot temperatures, gusty winds, and a wind shift with a cold front will create erratic fire behavior. * AFFECTED AREA: In South Central MT Fire Zones...123...124...125...126...127 128. * COUNTIES AFFECTED: In Central MT...Golden Valley...Musselshell...Wheatland. In South Central MT...Carbon...Park...Stillwater...Sweet Grass Yellowstone. In Southwest MT...Gallatin. * WIND: Southwest 10 to 20 mph with gusts up to 35 mph today, becoming northwest 10 to 15 with gusts to 25 mph along and behind a cold front tonight into Sunday morning. Winds become east over the plains and southwest over the mountains Sunday afternoon. * HUMIDITY: As low as 5 percent today and 10 percent Sunday. * TEMPERATURES: Up to 105 degrees today and 100 degrees Sunday. * COLD FRONT: A cold front moves through tonight shifting winds from the southwest to the northwest. |
| Alert: | High Wind Warning |
| Area(s): | East Glacier Park Region; Northern High Plains |
| Effective: | 2026-08-01 @ 3:32 pm -> 2026-08-02 @ 6:45 am |
| Onset: | 2026-08-01 @ 7:00 pm -> 2026-08-02 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-08-01 @ 3:32 pm |
| Headline: | High Wind Warning issued August 1 at 2:32PM MDT until August 2 at 12:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...West winds 25 to 35 mph with gusts up to 65 mph expected. Isolated wind prone areas along the Rocky Mountain Front will see gusts to 75 mph. * WHERE...East Glacier Park Region Zone, and Northern High Plains. * WHEN...From 6 PM this evening to noon MDT Sunday. * IMPACTS...Damaging winds will blow down trees and power lines. 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 9 PM Saturday and 6 AM Sunday when mountain wave activity will be at its peak. |
| Alert: | Extreme Heat Warning |
| Area(s): | Western and Central Chouteau County; Bears Paw Mountains and Southern Blaine; Fergus County below 4500ft |
| Effective: | 2026-08-01 @ 3:32 pm -> 2026-08-02 @ 6:45 am |
| Onset: | 2026-08-01 @ 3:32 pm -> 2026-08-02 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-08-01 @ 3:32 pm |
| Headline: | Extreme Heat Warning issued August 1 at 2:32PM 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. * WHERE...Bears Paw Mountains and Southern Blaine, Fergus County below 4500ft, and Western and Central Chouteau County. * WHEN...Until noon MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat. |
| Alert: | Extreme Heat Warning |
| Area(s): | Cascade County below 5000ft; Judith Basin County and Judith Gap; Madison River Valley; Gallatin Valley |
| Effective: | 2026-08-01 @ 3:32 pm -> 2026-08-02 @ 4:00 am |
| Onset: | 2026-08-01 @ 3:32 pm -> 2026-08-02 @ 4:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-08-01 @ 3:32 pm |
| Headline: | Extreme Heat Warning issued August 1 at 2:32PM MDT until August 2 at 3:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Dangerously hot conditions. High temperatures between 100 and 105 degrees expected. * WHERE...Cascade County below 5000ft, Judith Basin County and Judith Gap, Gallatin Valley, and Madison River Valley. * WHEN...Until 3 AM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat. |
| Alert: | Heat Advisory |
| Area(s): | Eastern Toole and Liberty; Hill County; Northern Blaine County; Eastern Pondera and Eastern Teton; Gates of the Mountains; Snowy and Judith Mountains; Helena Valley; Meagher County Valleys; Elkhorn and Boulder Mountains; Canyon Ferry Area; Missouri Headwaters; Beaverhead and Western Madison below 6000ft |
| Effective: | 2026-08-01 @ 3:32 pm -> 2026-08-02 @ 4:00 am |
| Onset: | 2026-08-01 @ 3:32 pm -> 2026-08-02 @ 4:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-08-01 @ 3:32 pm |
| Headline: | Heat Advisory issued August 1 at 2:32PM MDT until August 2 at 3:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...High temperatures up to 102 degrees expected. * WHERE...Portions of central, north central, and southwest Montana. * WHEN...Until 3 AM MDT Sunday. * IMPACTS...Hot temperatures may cause heat illnesses. |
| Alert: | Heat Advisory |
| Area(s): | Eastern Glacier, Western Toole, and Central Pondera |
| Effective: | 2026-08-01 @ 3:32 pm -> 2026-08-02 @ 6:45 am |
| Onset: | 2026-08-01 @ 3:32 pm -> 2026-08-02 @ 4:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-08-01 @ 3:32 pm |
| Headline: | Heat Advisory issued August 1 at 2:32PM MDT until August 2 at 3:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...For the Heat Advisory, high temperatures around 100 degrees expected. For the High Wind Warning, west winds 30 to 40 mph, with gusts up to 60 mph expected. * WHERE...Eastern Glacier, Western Toole, and Central Pondera. * WHEN...For the Heat Advisory, until 3 AM MDT Sunday. For the High Wind Warning, from 6 PM this evening to noon MDT Sunday. * IMPACTS...Damaging winds will blow down trees and power lines. Travel could be difficult, especially for high profile vehicles. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...The most intense winds are likely to occur between 9 PM Saturday and 6 AM Sunday when mountain wave activity will be at its peak. |
| Alert: | High Wind Warning |
| Area(s): | Eastern Glacier, Western Toole, and Central Pondera |
| Effective: | 2026-08-01 @ 3:32 pm -> 2026-08-02 @ 6:45 am |
| Onset: | 2026-08-01 @ 7:00 pm -> 2026-08-02 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-08-01 @ 3:32 pm |
| Headline: | High Wind Warning issued August 1 at 2:32PM MDT until August 2 at 12:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...For the Heat Advisory, high temperatures around 100 degrees expected. For the High Wind Warning, west winds 30 to 40 mph, with gusts up to 60 mph expected. * WHERE...Eastern Glacier, Western Toole, and Central Pondera. * WHEN...For the Heat Advisory, until 3 AM MDT Sunday. For the High Wind Warning, from 6 PM this evening to noon MDT Sunday. * IMPACTS...Damaging winds will blow down trees and power lines. Travel could be difficult, especially for high profile vehicles. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...The most intense winds are likely to occur between 9 PM Saturday and 6 AM Sunday when mountain wave activity will be at its peak. |
| Alert: | Red Flag Warning |
| 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: | 2026-08-01 @ 3:29 pm -> 2026-08-02 @ 6:30 am |
| Onset: | 2026-08-01 @ 3:29 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-08-01 @ 3:29 pm |
| Headline: | Red Flag Warning issued August 1 at 2:29PM 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 10 to 20 mph with gusts up to 45 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 10 percent. * TEMPERATURES...Up to 104. * COLD FRONT...A series of dry cold fronts will push through the area. The first will be this evening, with a second cold front arriving Sunday 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 Warning |
| 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: | 2026-08-01 @ 2:09 pm -> 2026-08-02 @ 1:00 am |
| Onset: | 2026-08-01 @ 2:09 pm -> 2026-08-02 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-08-01 @ 2:09 pm |
| Headline: | Extreme Heat Warning issued August 1 at 1:09PM MDT until August 2 at 12:00AM MDT by NWS Billings MT |
| Description: |
* WHAT...Dangerously hot conditions with high temperatures of 98 to 108. * WHERE...Portions of central, south central, and southeast Montana and north central Wyoming. * WHEN...Until midnight MDT tonight. * IMPACTS...Heat related illnesses increase significantly during extreme heat events. * ADDITIONAL DETAILS...Low temperatures in the 60s and 70s tonight followed by high temperatures in the 90s Sunday may cause lingering heat stress, especially for those without relief from the heat. Much cooler temperatures arrive by Monday. |
| Alert: | Red Flag Warning |
| Area(s): | Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties; 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: | 2026-08-01 @ 1:43 pm -> 2026-08-02 @ 7:00 am |
| Onset: | 2026-08-01 @ 3:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-08-01 @ 1:43 pm |
| Headline: | Red Flag Warning issued August 1 at 12:43PM MDT until August 2 at 9:00PM MDT by NWS Glasgow MT |
| Description: |
...CRITICAL FIRE WEATHER CONCERNS THIS WEEKEND... * WIND...Southeast winds today will become west and northwest on Sunday with speeds at 15 to 25 mph with gusts to 35 mph. * HUMIDITY...minimum relative humidity ranging 8 to 20%. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
| Alert: | Extreme Heat Warning |
| Area(s): | McCone |
| Effective: | 2026-08-01 @ 12:47 pm -> 2026-08-02 @ 1:15 pm |
| Onset: | 2026-08-01 @ 1:00 pm -> 2026-08-02 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-08-01 @ 12:47 pm |
| Headline: | Extreme Heat Warning issued August 1 at 11:47AM MDT until August 2 at 6:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...For the Extreme Heat Warning, dangerously hot temperatures with highs today in the low to mid 100s. For the Lake Wind Advisory, west winds 10 to 20 mph with gusts up to 30 mph expected. * WHERE...McCone County. * WHEN...For the Extreme Heat Warning, until 6 PM MDT Sunday. For the Lake Wind Advisory, from 6 PM this evening to 6 PM MDT Sunday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Low temperatures on Sunday morning will be in the upper 60s to mid 70s. Poor overnight recovery will add to heat related stress. |
| Alert: | Extreme Heat Warning |
| Area(s): | Daniels; Sheridan; Western Roosevelt; Richland; Dawson; Prairie; Wibaux; Eastern Roosevelt |
| Effective: | 2026-08-01 @ 12:47 pm -> 2026-08-02 @ 1:15 pm |
| Onset: | 2026-08-01 @ 1:00 pm -> 2026-08-02 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-08-01 @ 12:47 pm |
| Headline: | Extreme Heat Warning issued August 1 at 11:47AM MDT until August 2 at 6:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Dangerously hot temperatures with highs today in the mid 90s to mid 100s. * WHERE...Daniels, Dawson, Eastern Roosevelt, Prairie, Richland, Sheridan, Western Roosevelt, and Wibaux Counties. * WHEN...Until 6 PM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Low temperatures on Sunday morning will be in the upper 60s to low 70s. Poor overnight recovery will add to heat related stress. |
| Alert: | Lake Wind Advisory |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield |
| Effective: | 2026-08-01 @ 12:47 pm -> 2026-08-02 @ 1:15 pm |
| Onset: | 2026-08-01 @ 7:00 pm -> 2026-08-02 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-08-01 @ 12:47 pm |
| Headline: | Lake Wind Advisory issued August 1 at 11:47AM MDT until August 2 at 6:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...For the Extreme Heat Warning, dangerously hot temperatures with highs on today between 100 and 108 degrees. For the Lake Wind Advisory, west winds 10 to 20 mph with gusts up to 30 mph expected. * WHERE...Central and Southeast Phillips, Central and Southern Valley, Garfield, and Petroleum Counties. * WHEN...For the Extreme Heat Warning, until noon MDT Sunday. For the Lake Wind Advisory, from 6 PM this evening to 6 PM MDT Sunday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Low temperatures on Sunday morning will be in the upper 60s to mid 70s. Poor overnight recovery will add to heat related stress. |
| Alert: | Lake Wind Advisory |
| Area(s): | McCone |
| Effective: | 2026-08-01 @ 12:47 pm -> 2026-08-02 @ 1:15 pm |
| Onset: | 2026-08-01 @ 7:00 pm -> 2026-08-02 @ 7:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-08-01 @ 12:47 pm |
| Headline: | Lake Wind Advisory issued August 1 at 11:47AM MDT until August 2 at 6:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...For the Extreme Heat Warning, dangerously hot temperatures with highs today in the low to mid 100s. For the Lake Wind Advisory, west winds 10 to 20 mph with gusts up to 30 mph expected. * WHERE...McCone County. * WHEN...For the Extreme Heat Warning, until 6 PM MDT Sunday. For the Lake Wind Advisory, from 6 PM this evening to 6 PM MDT Sunday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Low temperatures on Sunday morning will be in the upper 60s to mid 70s. Poor overnight recovery will add to heat related stress. |
| Alert: | Extreme Heat Warning |
| Area(s): | Northern Phillips; Southwest Phillips; Northern Valley |
| Effective: | 2026-08-01 @ 12:47 pm -> 2026-08-02 @ 1:00 pm |
| Onset: | 2026-08-01 @ 1:00 pm -> 2026-08-02 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-08-01 @ 12:47 pm |
| Headline: | Extreme Heat Warning issued August 1 at 11:47AM MDT until August 2 at 12:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Dangerously hot conditions with highs today in the upper 90s to mid 100s. * WHERE...Northern Phillips, Northern Valley, and Southwest Phillips Counties. * WHEN...Until noon MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Low temperatures on Sunday morning will be in the upper 60s to mid 70s. Poor overnight recovery will add to heat related stress. |
| Alert: | Extreme Heat Warning |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield |
| Effective: | 2026-08-01 @ 12:47 pm -> 2026-08-02 @ 1:15 pm |
| Onset: | 2026-08-01 @ 1:00 pm -> 2026-08-02 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-08-01 @ 12:47 pm |
| Headline: | Extreme Heat Warning issued August 1 at 11:47AM MDT until August 2 at 12:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...For the Extreme Heat Warning, dangerously hot temperatures with highs on today between 100 and 108 degrees. For the Lake Wind Advisory, west winds 10 to 20 mph with gusts up to 30 mph expected. * WHERE...Central and Southeast Phillips, Central and Southern Valley, Garfield, and Petroleum Counties. * WHEN...For the Extreme Heat Warning, until noon MDT Sunday. For the Lake Wind Advisory, from 6 PM this evening to 6 PM MDT Sunday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Heat related illnesses increase significantly during extreme heat and high humidity events. * ADDITIONAL DETAILS...Low temperatures on Sunday morning will be in the upper 60s to mid 70s. Poor overnight recovery will add to heat related stress. |
| 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: | 2026-07-31 @ 2:11 pm -> 2026-07-31 @ 2:26 pm |
| Onset: | 2026-08-01 @ 3:00 pm -> 2026-08-02 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Past |
| Issued By: | NWS Missoula MT on 2026-07-31 @ 2:11 pm |
| Headline: | The Fire Weather Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation. |
| Description: |
The Fire Weather Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation. |
| Alert: | Red Flag Warning |
| 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: | 2026-07-31 @ 2:11 pm -> 2026-07-31 @ 10:15 pm |
| Onset: | 2026-08-01 @ 3:00 pm -> 2026-08-02 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-07-31 @ 2:11 pm |
| Headline: | Red Flag Warning issued July 31 at 1:11PM MDT until August 2 at 12:00AM MDT by NWS Missoula MT |
| Description: |
...FIRE WEATHER WATCH IS CANCELLED FOR CLEARWATER/NEZ PERCE... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM PDT SATURDAY DUE TO WIND SHIFT, MOISTURE DROP AND WIND, LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS CANYON... ...RED FLAG WARNING IN EFFECT FROM 2 PM SATURDAY TO MIDNIGHT MDT SATURDAY NIGHT DUE TO WIND AND LOW RELATIVE HUMIDITY FOR A PORTION OF MT... ...RED FLAG WARNING IN EFFECT FROM 2 PM SATURDAY TO 9 PM MDT SUNDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD AND EAST BEAVERHEAD... ... .A ridge breakdown and dry frontal passage will bring critical fire weather to the region. The National Weather Service in Missoula MT has issued a Red Flag Warning in effect from 2 PM Saturday to midnight MDT Saturday Night. * AFFECTED AREA...A portion of MT. * TIMING...From 2 PM Saturday to midnight MDT Saturday Night. * WINDS...West winds 15 to 25 mph with gusts up to 40 mph and isolated gusts up to 50 mph in higher terrain especially along the Continental Divide. * RELATIVE HUMIDITY...Relative Humidity between 9 to 20 percent. * 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: | 2026-07-31 @ 2:11 pm -> 2026-07-31 @ 2:26 pm |
| Onset: | 2026-08-01 @ 3:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Past |
| Issued By: | NWS Missoula MT on 2026-07-31 @ 2:11 pm |
| Headline: | The Fire Weather Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation. |
| Description: |
The Fire Weather Watch has been replaced. Please see the latest information from NWS Missoula MT on this developing situation. |
| Alert: | Red Flag Warning |
| Area(s): | Deerlodge/Western Beaverhead National Forest; Eastern Beaverhead National Forest |
| Effective: | 2026-07-31 @ 2:11 pm -> 2026-07-31 @ 10:15 pm |
| Onset: | 2026-08-01 @ 3:00 pm -> 2026-08-02 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-07-31 @ 2:11 pm |
| Headline: | Red Flag Warning issued July 31 at 1:11PM MDT until August 2 at 9:00PM MDT by NWS Missoula MT |
| Description: |
...FIRE WEATHER WATCH IS CANCELLED FOR CLEARWATER/NEZ PERCE... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 8 PM PDT SATURDAY DUE TO WIND SHIFT, MOISTURE DROP AND WIND, LOW RELATIVE HUMIDITY FOR PALOUSE/HELLS CANYON... ...RED FLAG WARNING IN EFFECT FROM 2 PM SATURDAY TO MIDNIGHT MDT SATURDAY NIGHT DUE TO WIND AND LOW RELATIVE HUMIDITY FOR A PORTION OF MT... ...RED FLAG WARNING IN EFFECT FROM 2 PM SATURDAY TO 9 PM MDT SUNDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR DEERLODGE/WEST BEAVERHEAD AND EAST BEAVERHEAD... ... .A ridge breakdown and dry frontal passage will bring critical fire weather to the region. The National Weather Service in Missoula MT has issued a Red Flag Warning in effect from 2 PM Saturday to 9 PM MDT Sunday. * AFFECTED AREA...Fire Weather Zones 110 and 111. * TIMING...From 2 PM Saturday to 9 PM MDT Sunday. * WINDS...West winds 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...Relative Humidity between 8 to 20 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |