Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Severe Thunderstorm Warning |
| Area(s): | Dawson, MT; McCone, MT; Richland, MT; Roosevelt, MT |
| Effective: | 2026-05-26 @ 6:15 pm -> 2026-05-26 @ 7:15 pm |
| Onset: | 2026-05-26 @ 6:15 pm -> 2026-05-26 @ 7:15 pm |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Glasgow MT on 2026-05-26 @ 6:15 pm |
| Headline: | Severe Thunderstorm Warning issued May 26 at 5:15PM MDT until May 26 at 6:15PM MDT by NWS Glasgow MT |
| Description: |
SVRGGW The National Weather Service in Glasgow has issued a * Severe Thunderstorm Warning for... South central Roosevelt County in northeastern Montana... Northeastern McCone County in northeastern Montana... Northwestern Dawson County in northeastern Montana... Northwestern Richland County in northeastern Montana... * Until 615 PM MDT. * At 515 PM MDT, a severe thunderstorm was located 8 miles northeast of Richey, or 29 miles southeast of Poplar, moving north at 15 mph. HAZARD...60 mph wind gusts and penny size hail. SOURCE...Radar indicated. IMPACT...Expect damage to roofs, siding, and trees. * Locations impacted include... Poplar, Brockton, Sprole, Fort Kipp, and Enid. |
| Alert: | Special Weather Statement |
| Area(s): | Big Belt, Bridger and Castle Mountains; Canyon Ferry Area; Missouri Headwaters; Gallatin Valley |
| Effective: | 2026-05-26 @ 6:08 pm -> 2026-05-26 @ 7:00 pm |
| Onset: | 2026-05-26 @ 6:08 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-05-26 @ 6:08 pm |
| Headline: | Special Weather Statement issued May 26 at 5:08PM MDT by NWS Great Falls MT |
| Description: |
At 507 PM MDT, Doppler radar was tracking strong thunderstorms along a line extending from 6 miles southwest of Manhattan to near Belgrade. Movement was northwest at 30 mph. HAZARD...Wind gusts of 45 to 55 mph and half inch hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Bozeman, Belgrade, Three Forks, Manhattan, Logan, Amsterdam, Trident, Church Hill, Willow Creek, Menard, Madison Buffalo Jump State Park, and Missouri Headwaters State Park. |
| Alert: | Special Weather Statement |
| Area(s): | Central and Southern Valley; Daniels; Western Roosevelt; Northern Valley |
| Effective: | 2026-05-26 @ 5:54 pm -> 2026-05-26 @ 7:00 pm |
| Onset: | 2026-05-26 @ 5:54 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-05-26 @ 5:54 pm |
| Headline: | Special Weather Statement issued May 26 at 4:54PM MDT by NWS Glasgow MT |
| Description: |
At 453 PM MDT, Doppler radar was tracking a strong thunderstorm 7 miles southeast of Peerless, or 16 miles southwest of Scobey, moving northwest at 20 mph. HAZARD...Wind gusts of 50 to 55 mph. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Locations impacted include... Richland, Peerless, West Fork, and Four Buttes. |
| Alert: | Special Weather Statement |
| Area(s): | Upper Blackfoot and MacDonald Pass; Gates of the Mountains |
| Effective: | 2026-05-26 @ 5:50 pm -> 2026-05-26 @ 6:30 pm |
| Onset: | 2026-05-26 @ 5:50 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-05-26 @ 5:50 pm |
| Headline: | Special Weather Statement issued May 26 at 4:50PM MDT by NWS Great Falls MT |
| Description: |
At 450 PM MDT, Doppler radar was tracking a strong thunderstorm 17 miles southeast of Lincoln, or 24 miles northwest of Helena, moving northwest at 15 mph. HAZARD...Wind gusts up to 50 mph and nickel size hail. SOURCE...Radar indicated. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor hail damage to vegetation is possible. Locations impacted include... Lincoln. |
| Alert: | Special Weather Statement |
| Area(s): | Western Roosevelt; McCone; Richland; Dawson; Eastern Roosevelt |
| Effective: | 2026-05-26 @ 5:40 pm -> 2026-05-26 @ 6:45 pm |
| Onset: | 2026-05-26 @ 5:40 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-05-26 @ 5:40 pm |
| Headline: | Special Weather Statement issued May 26 at 4:40PM MDT by NWS Glasgow MT |
| Description: |
At 440 PM MDT, Doppler radar was tracking a strong thunderstorm 8 miles northeast of Richey, or 31 miles southeast of Poplar, moving northwest at 10 mph. HAZARD...Wind gusts of 50 to 55 mph and pea 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... Poplar, Culbertson, Brockton, Richey, Lambert, Sprole, Fort Kipp, and Enid. |
| Alert: | Heat Advisory |
| Area(s): | Northern Blaine County |
| Effective: | 2026-05-26 @ 12:25 pm -> 2026-05-27 @ 7:00 am |
| Onset: | 2026-05-26 @ 1:00 pm -> 2026-05-27 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-05-26 @ 12:25 pm |
| Headline: | Heat Advisory issued May 26 at 11:25AM MDT until May 27 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Afternoon temperatures in the middle to upper 90s through Wednesday with poor overnight temperature recovery. * WHERE...Northern Blaine County. * WHEN...Until 9 PM MDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. Poor overnight temperature recovery may make cooling difficult for those without air conditioning. |
| Alert: | Heat Advisory |
| Area(s): | Hill County |
| Effective: | 2026-05-26 @ 12:25 pm -> 2026-05-27 @ 7:00 am |
| Onset: | 2026-05-26 @ 1:00 pm -> 2026-05-27 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-05-26 @ 12:25 pm |
| Headline: | Heat Advisory issued May 26 at 11:25AM MDT until May 27 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Afternoon temperatures in the middle to upper 90s through Wednesday with poor overnight temperature recovery. * WHERE...Hill County. * WHEN...Until 9 PM MDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. Poor overnight temperature recovery may make cooling difficult for those without air conditioning. |
| Alert: | Red Flag Warning |
| Area(s): | Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties; Dawson/McCone/Prairie/Richland/Wibaux Counties |
| Effective: | 2026-05-25 @ 10:49 pm -> 2026-05-26 @ 5:00 pm |
| Onset: | 2026-05-26 @ 1:00 pm -> 2026-05-26 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-05-25 @ 10:49 pm |
| Headline: | Red Flag Warning issued May 25 at 9:49PM MDT until May 26 at 9:00PM MDT by NWS Glasgow MT |
| Description: |
...RED FLAG WARNING IN EFFECT FROM NOON TO 10 PM MDT WEDNESDAY FOR LOW RELATIVE HUMIDITY AND STRONG WINDS FOR FIRE WEATHER ZONES 120 AND 122... The National Weather Service in Glasgow has issued a Red Flag Warning, which is in effect from noon to 10 PM MDT Wednesday. * AFFECTED AREA...Fire weather zones 120 and 122. * WIND...Southeast at 15 to 25 mph with gusts to 40 mph. * HUMIDITY...As low as 14 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
| Alert: | Red Flag Warning |
| Area(s): | Fort Peck Reservation and Daniels/Roosevelt/Sheridan Counties; Dawson/McCone/Prairie/Richland/Wibaux Counties |
| Effective: | 2026-05-25 @ 10:49 pm -> 2026-05-26 @ 5:00 pm |
| Onset: | 2026-05-27 @ 1:00 pm -> 2026-05-27 @ 11:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-05-25 @ 10:49 pm |
| Headline: | Red Flag Warning issued May 25 at 9:49PM MDT until May 27 at 10:00PM MDT by NWS Glasgow MT |
| Description: |
...RED FLAG WARNING IN EFFECT FROM NOON TO 10 PM MDT WEDNESDAY FOR LOW RELATIVE HUMIDITY AND STRONG WINDS FOR FIRE WEATHER ZONES 120 AND 122... The National Weather Service in Glasgow has issued a Red Flag Warning, which is in effect from noon to 10 PM MDT Wednesday. * AFFECTED AREA...Fire weather zones 120 and 122. * WIND...Southeast at 15 to 25 mph with gusts to 40 mph. * HUMIDITY...As low as 14 percent. * IMPACTS...Any fires that develop will likely spread rapidly. Outdoor burning is not recommended. |
| Alert: | Heat Advisory |
| Area(s): | Petroleum |
| Effective: | 2026-05-25 @ 10:44 pm -> 2026-05-26 @ 5:00 pm |
| Onset: | 2026-05-26 @ 1:00 pm -> 2026-05-26 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-05-25 @ 10:44 pm |
| Headline: | Heat Advisory issued May 25 at 9:44PM MDT until May 26 at 9:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...For the Lake Wind Advisory, southeast winds 15 to 25 mph with gusts up to 40 mph expected. For the Heat Advisory on Tuesday, temperatures as high as 104 degrees. For the Heat Advisory on Wednesday, temperatures as high as 102. * WHERE...Petroleum County. * WHEN...For the Lake Wind Advisory, from 9 AM Tuesday to 6 AM MDT Thursday. For the Heat Advisory, from noon to 9 PM MDT Tuesday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Wave heights as high as 5 feet are expected. |
| Alert: | Heat Advisory |
| Area(s): | Daniels; Sheridan; Western Roosevelt; Richland; Dawson; Prairie; Wibaux; Northern Phillips; Northern Valley; Eastern Roosevelt |
| Effective: | 2026-05-25 @ 10:44 pm -> 2026-05-26 @ 5:00 pm |
| Onset: | 2026-05-26 @ 1:00 pm -> 2026-05-26 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-05-25 @ 10:44 pm |
| Headline: | Heat Advisory issued May 25 at 9:44PM MDT until May 26 at 9:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...For the Heat Advisory on Tuesday, temperatures as high as 104 degrees. For the Heat Advisory on Wednesday, temperatures as high as 102. * WHERE...Daniels, Dawson, Eastern Roosevelt, Northern Phillips, Northern Valley, Prairie, Richland, Sheridan, Western Roosevelt, and Wibaux Counties. * WHEN...For the first Heat Advisory, from noon to 9 PM MDT Tuesday. For the second Heat Advisory, from noon to 9 PM MDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. |
| Alert: | Heat Advisory |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Garfield; McCone |
| Effective: | 2026-05-25 @ 10:44 pm -> 2026-05-26 @ 5:00 pm |
| Onset: | 2026-05-26 @ 1:00 pm -> 2026-05-26 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-05-25 @ 10:44 pm |
| Headline: | Heat Advisory issued May 25 at 9:44PM MDT until May 26 at 9:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...For the Lake Wind Advisory, southeast winds 15 to 25 mph with gusts up to 40 mph expected. For the Heat Advisory on Tuesday, temperatures as high as 104 degrees. For the Heat Advisory on Wednesday, temperatures as high as 102. * WHERE...Central and Southeast Phillips, Central and Southern Valley, Garfield, and McCone Counties. * WHEN...For the Lake Wind Advisory, from 9 AM Tuesday to 6 AM MDT Thursday. For the first Heat Advisory, from noon to 9 PM MDT Tuesday. For the second Heat Advisory, from noon to 9 PM MDT Wednesday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Wave heights as high as 5 feet are expected. |
| Alert: | Heat Advisory |
| Area(s): | Daniels; Sheridan; Western Roosevelt; Richland; Dawson; Prairie; Wibaux; Northern Phillips; Northern Valley; Eastern Roosevelt |
| Effective: | 2026-05-25 @ 10:44 pm -> 2026-05-26 @ 5:00 pm |
| Onset: | 2026-05-27 @ 1:00 pm -> 2026-05-27 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-05-25 @ 10:44 pm |
| Headline: | Heat Advisory issued May 25 at 9:44PM MDT until May 27 at 9:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...For the Heat Advisory on Tuesday, temperatures as high as 104 degrees. For the Heat Advisory on Wednesday, temperatures as high as 102. * WHERE...Daniels, Dawson, Eastern Roosevelt, Northern Phillips, Northern Valley, Prairie, Richland, Sheridan, Western Roosevelt, and Wibaux Counties. * WHEN...For the first Heat Advisory, from noon to 9 PM MDT Tuesday. For the second Heat Advisory, from noon to 9 PM MDT Wednesday. * IMPACTS...Hot temperatures may cause heat illnesses. |
| Alert: | Heat Advisory |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Garfield; McCone |
| Effective: | 2026-05-25 @ 10:44 pm -> 2026-05-26 @ 5:00 pm |
| Onset: | 2026-05-27 @ 1:00 pm -> 2026-05-27 @ 10:00 pm |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-05-25 @ 10:44 pm |
| Headline: | Heat Advisory issued May 25 at 9:44PM MDT until May 27 at 9:00PM MDT by NWS Glasgow MT |
| Description: |
* WHAT...For the Lake Wind Advisory, southeast winds 15 to 25 mph with gusts up to 40 mph expected. For the Heat Advisory on Tuesday, temperatures as high as 104 degrees. For the Heat Advisory on Wednesday, temperatures as high as 102. * WHERE...Central and Southeast Phillips, Central and Southern Valley, Garfield, and McCone Counties. * WHEN...For the Lake Wind Advisory, from 9 AM Tuesday to 6 AM MDT Thursday. For the first Heat Advisory, from noon to 9 PM MDT Tuesday. For the second Heat Advisory, from noon to 9 PM MDT Wednesday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Wave heights as high as 5 feet are expected. |
| Alert: | Lake Wind Advisory |
| Area(s): | Petroleum |
| Effective: | 2026-05-25 @ 10:44 pm -> 2026-05-26 @ 5:00 pm |
| Onset: | 2026-05-26 @ 10:00 am -> 2026-05-28 @ 7:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-05-25 @ 10:44 pm |
| Headline: | Lake Wind Advisory issued May 25 at 9:44PM MDT until May 28 at 6:00AM MDT by NWS Glasgow MT |
| Description: |
* WHAT...For the Lake Wind Advisory, southeast winds 15 to 25 mph with gusts up to 40 mph expected. For the Heat Advisory on Tuesday, temperatures as high as 104 degrees. For the Heat Advisory on Wednesday, temperatures as high as 102. * WHERE...Petroleum County. * WHEN...For the Lake Wind Advisory, from 9 AM Tuesday to 6 AM MDT Thursday. For the Heat Advisory, from noon to 9 PM MDT Tuesday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Hot temperatures and high humidity may cause heat illnesses. * ADDITIONAL DETAILS...Wave heights as high as 5 feet are expected. |
| Alert: | Lake Wind Advisory |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Garfield; McCone |
| Effective: | 2026-05-25 @ 10:44 pm -> 2026-05-26 @ 5:00 pm |
| Onset: | 2026-05-26 @ 10:00 am -> 2026-05-28 @ 7:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-05-25 @ 10:44 pm |
| Headline: | Lake Wind Advisory issued May 25 at 9:44PM MDT until May 28 at 6:00AM MDT by NWS Glasgow MT |
| Description: |
* WHAT...For the Lake Wind Advisory, southeast winds 15 to 25 mph with gusts up to 40 mph expected. For the Heat Advisory on Tuesday, temperatures as high as 104 degrees. For the Heat Advisory on Wednesday, temperatures as high as 102. * WHERE...Central and Southeast Phillips, Central and Southern Valley, Garfield, and McCone Counties. * WHEN...For the Lake Wind Advisory, from 9 AM Tuesday to 6 AM MDT Thursday. For the first Heat Advisory, from noon to 9 PM MDT Tuesday. For the second Heat Advisory, from noon to 9 PM MDT Wednesday. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. Hot temperatures may cause heat illnesses. * ADDITIONAL DETAILS...Wave heights as high as 5 feet are expected. |