Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Lake Wind Advisory |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone |
| Effective: | 2026-09-12 @ 2:39 pm -> 2026-09-13 @ 5:45 am |
| Onset: | 2026-09-13 @ 11:00 am -> 2026-09-14 @ 1:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-09-12 @ 2:39 pm |
| Headline: | Lake Wind Advisory issued September 12 at 1:39PM MDT until September 14 at 12:00AM MDT by NWS Glasgow MT |
| Description: |
* WHAT...East winds 15 to 20 mph with gusts up to 35 mph expected. * WHERE...Fort Peck Lake. * WHEN...From 10 AM Sunday to midnight MDT Sunday Night. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. * ADDITIONAL DETAILS...Wave heights up to 3 feet Sunday afternoon. West winds will strengthen again Monday morning. |
| Alert: | High Wind Watch |
| Area(s): | Madison River Valley |
| Effective: | 2026-09-12 @ 1:39 pm -> 2026-09-13 @ 4:45 am |
| Onset: | 2026-09-13 @ 1:00 pm -> 2026-09-13 @ 10:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-09-12 @ 1:39 pm |
| Headline: | High Wind Watch issued September 12 at 12:39PM MDT until September 13 at 9:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Southwest winds 30 to 40 mph, with gusts up to 60 mph possible. * WHERE...Madison River Valley. * WHEN...From Sunday afternoon through Sunday evening. * IMPACTS...Travel could be difficult, especially for high profile vehicles. |
| Alert: | High Wind Watch |
| Area(s): | Fergus County below 4500ft; Snowy and Judith Mountains |
| Effective: | 2026-09-12 @ 1:39 pm -> 2026-09-13 @ 4:45 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 2026-09-12 @ 1:39 pm |
| Headline: | High Wind Watch issued September 12 at 12:39PM MDT until September 14 at 6:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...West winds 25 to 40 mph with gusts up to 60 mph possible. * WHERE...Snowy and Judith Mountains and Fergus County below 4500ft. * WHEN...From Monday morning through Monday afternoon. * IMPACTS...Travel could be difficult, especially for high profile vehicles. |
| 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. |
