Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Special Weather Statement |
| Area(s): | Cascade County below 5000ft; Judith Basin County and Judith Gap; Little Belt and Highwood Mountains |
| Effective: | 2026-09-13 @ 8:37 pm -> 2026-09-13 @ 9:15 pm |
| Onset: | 2026-09-13 @ 8:37 pm |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Great Falls MT on 2026-09-13 @ 8:37 pm |
| Headline: | Special Weather Statement issued September 13 at 7:37PM MDT by NWS Great Falls MT |
| Description: |
At 737 PM MDT, Doppler radar was tracking a strong thunderstorm 18 miles southwest of Belt, or 26 miles south of Great Falls, moving northeast at 40 mph. HAZARD...Wind gusts up to 40 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... Belt, Geyser, Sluice Boxes State Park, Raynesford, and Armington. |
| Alert: | High Wind Watch |
| Area(s): | Judith Basin County and Judith Gap; Fergus County below 4500ft; Snowy and Judith Mountains |
| Effective: | 2026-09-13 @ 6:48 pm -> 2026-09-14 @ 10:00 am |
| Onset: | 2026-09-14 @ 10:00 am -> 2026-09-14 @ 7:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-09-13 @ 6:48 pm |
| Headline: | High Wind Watch issued September 13 at 5:48PM MDT until September 14 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...West to northwest winds 25 to 35 mph with gusts up to 60 mph possible. * WHERE...Snowy and Judith Mountains, Fergus County below 4500ft, and Judith Basin County and Judith Gap. * WHEN...From Monday morning through Monday afternoon. * IMPACTS...Travel could be difficult, especially for high profile vehicles. |
| Alert: | Lake Wind Advisory |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone |
| Effective: | 2026-09-13 @ 11:58 am -> 2026-09-14 @ 7:00 am |
| Onset: | 2026-09-13 @ 11:58 am -> 2026-09-15 @ 1:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-09-13 @ 11:58 am |
| Headline: | Lake Wind Advisory issued September 13 at 10:58AM MDT until September 15 at 12:00AM MDT by NWS Glasgow MT |
| Description: |
* WHAT...Southeast winds of 15 to 25 mph, gusting to 35 mph through Sunday evening before briefly diminishing at night. Winds on Monday will increase to 20 to 30 mph, gusting to 45 mph. * WHERE...Fort Peck Lake. * WHEN...Until midnight MDT Monday Night. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. * ADDITIONAL DETAILS...Wave heights as high as 4 to 5 feet on Monday. |
| Alert: | Red Flag Warning |
| Area(s): | Eastern Beaverhead National Forest |
| Effective: | 2026-09-12 @ 10:15 am -> 2026-09-13 @ 10:00 pm |
| Onset: | 2026-09-13 @ 1:00 pm -> 2026-09-13 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Missoula MT on 2026-09-12 @ 10:15 am |
| Headline: | Red Flag Warning issued September 12 at 9:15AM MDT until September 13 at 9:00PM MDT by NWS Missoula MT |
| Description: |
...RED FLAG WARNING IN EFFECT FROM NOON TO 9 PM MDT SUNDAY DUE TO WIND AND LOW RELATIVE HUMIDITY FOR EAST BEAVERHEAD... The National Weather Service in Missoula MT has issued a Red Flag Warning in effect from noon to 9 PM MDT Sunday. * AFFECTED AREA...Fire Weather Zone 111. * TIMING...From noon to 9 PM MDT Sunday. * WINDS...Southwest winds 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...Relative Humidity between 15 to 25 percent. * IMPACTS...Any fires that develop will spread rapidly. Outdoor burning is not recommended. |
