Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Special Weather Statement |
| Area(s): | Northeastern Yellowstone; Southwestern Yellowstone |
| Effective: | 2026-09-07 @ 3:11 am -> 2026-09-07 @ 3:45 am |
| Onset: | 2026-09-07 @ 3:11 am |
| Severity: | Moderate |
| Certainty: | Observed |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-09-07 @ 3:11 am |
| Headline: | Special Weather Statement issued September 7 at 2:11AM MDT by NWS Billings MT |
| Description: |
At 211 AM MDT, Doppler radar was tracking a strong thunderstorm near Billings Heights, or 6 miles northeast of Billings, moving east at 20 mph. HAZARD...Wind gusts of 45 to 55 mph, pea size hail, and heavy rainfall. SOURCE...Radar indicated. Billings airport reported a gust of 53 mph as this storm moved through. IMPACT...Gusty winds could knock down tree limbs and blow around unsecured objects. Minor damage to outdoor objects is possible. Locations impacted include... Billings, Shepherd, Huntley, Lockwood, Billings Heights and Worden. |
| Alert: | Severe Thunderstorm Warning |
| Area(s): | Valley, MT |
| Effective: | 2026-09-07 @ 2:55 am -> 2026-09-07 @ 4:00 am |
| Onset: | 2026-09-07 @ 2:55 am -> 2026-09-07 @ 4:00 am |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Glasgow MT on 2026-09-07 @ 2:55 am |
| Headline: | Severe Thunderstorm Warning issued September 7 at 1:55AM MDT until September 7 at 3:00AM MDT by NWS Glasgow MT |
| Description: |
SVRGGW The National Weather Service in Glasgow has issued a * Severe Thunderstorm Warning for... Northern Valley County in northeastern Montana... * Until 300 AM MDT. * At 154 AM MDT, a severe thunderstorm was located 16 miles west of Opheim, moving northeast at 30 mph. HAZARD...60 mph wind gusts and quarter size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect wind damage to roofs, siding, and trees. * Locations impacted include... Opheim, Port Of Opheim, Thoeny, Baylor, and Glentana. |
| Alert: | Lake Wind Advisory |
| Area(s): | Central and Southeast Phillips; Central and Southern Valley; Petroleum; Garfield; McCone |
| Effective: | 2026-09-06 @ 2:39 pm -> 2026-09-07 @ 1:00 pm |
| Onset: | 2026-09-07 @ 3:00 pm -> 2026-09-09 @ 1:00 am |
| Severity: | Moderate |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Glasgow MT on 2026-09-06 @ 2:39 pm |
| Headline: | Lake Wind Advisory issued September 6 at 1:39PM MDT until September 9 at 12:00AM MDT by NWS Glasgow MT |
| Description: |
* WHAT...West winds 20 to 30 mph with gusts up to 45 mph expected. * WHERE...Fort Peck Lake. * WHEN...From 2 PM Monday to midnight MDT Tuesday Night. * IMPACTS...Strong winds and rough waves on area lakes will create hazardous conditions for small craft. * ADDITIONAL DETAILS...Waves as high as 5 feet. |
| Alert: | Flood Watch |
| Area(s): | East Glacier Park Region; Northern High Plains; Eastern Glacier, Western Toole, and Central Pondera; Eastern Toole and Liberty; Southern Rocky Mountain Front; Southern High Plains; Eastern Pondera and Eastern Teton |
| Effective: | 2026-09-06 @ 12:32 pm -> 2026-09-07 @ 7:15 am |
| Onset: | 2026-09-06 @ 4:00 pm -> 2026-09-08 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-09-06 @ 12:32 pm |
| Headline: | Flood Watch issued September 6 at 11:32AM MDT until September 8 at 12:00PM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Flooding caused by excessive rainfall is possible. * WHERE...A portion of north central Montana, including the following areas, East Glacier Park Region, Eastern Glacier, Western Toole, and Central Pondera, Eastern Pondera and Eastern Teton, Eastern Toole and Liberty, Northern High Plains, Southern High Plains and Southern Rocky Mountain Front. * WHEN...From 3 PM MDT this afternoon through Tuesday morning. * IMPACTS...Excessive runoff may result in minor flooding of creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage areas. Rural gravel and dirt roads can become muddy and may become difficult to travel. Rock/debris slides are possible in the mountains. * ADDITIONAL DETAILS... - Thunderstorms today will be capable of producing 0.50 to 1 inch per hour rain rates. Periods of moderate to heavy rainfall will be possible Monday through Tuesday morning. Widespread 0.75 to 1.5 inches of rain have already fallen along the Rocky Mountain Front over the past 24 hours. Additional widespread rain accumulations of 1 to 3 inches are possible along the Rocky Mountain Front and Sweet Grass Hills with isolated 4 inches possible along and north of US Highway 2 this afternoon through Tuesday morning. - http://www.weather.gov/safety/flood |
| Alert: | Flood Watch |
| Area(s): | West Glacier Region; Flathead/Mission Valleys; Potomac/Seeley Lake Region |
| Effective: | 2026-09-06 @ 10:51 am -> 2026-09-08 @ 1:00 pm |
| Onset: | 2026-09-06 @ 4:00 pm -> 2026-09-08 @ 1:00 pm |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2026-09-06 @ 10:51 am |
| Headline: | Flood Watch issued September 6 at 9:51AM MDT until September 8 at 12:00PM MDT by NWS Missoula MT |
| Description: |
* WHAT...Flooding caused by excessive rainfall is possible. * WHERE...Portions of northwest and west central Montana, including the following areas, in northwest Montana, Flathead/Mission Valleys and West Glacier Region. In west central Montana, Potomac/Seeley Lake Region. * WHEN...From 3 PM MDT this afternoon through Tuesday morning. * IMPACTS...Excessive runoff may result in flooding of creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Thunderstorms capable of rainfall rates of 0.75" to 1.00" per hour are possible this afternoon and evening (Sept 6), which could lead to localized debris flows. This period will then be followed by prolonged moderate to heavy rainfall Monday into Tuesday morning of an additional 1 to 3 inches in the valleys, with 2 to 4 inches in the higher terrain, especially along the Continental Divide and in Glacier National Park. - https://www.weather.gov/mso/hydrology |
| Alert: | Hydrologic Outlook |
| Area(s): | Flathead, MT; Lake, MT; Missoula, MT |
| Effective: | 2026-09-05 @ 11:43 am -> 2026-09-08 @ 6:00 am |
| Onset: | 2026-09-05 @ 11:43 am |
| Severity: | Unknown |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Missoula MT on 2026-09-05 @ 11:43 am |
| Headline: | Hydrologic Outlook issued September 5 at 10:43AM MDT by NWS Missoula MT |
| Description: |
ESFMSO What: Widespread moderate rainfall over a prolonged period of time. Storm total amounts between 1 to 3 inches for valleys and 2 to 3 inches for the mountains. There is a 10 percent chance of isolated rainfall amounts up to 4 inches along the Continental Divide. Where: Flathead and Lake Counties in northwest Montana, including Glacier National Park. Missoula county in west-central Montana. Timing: Beginning Sunday morning, continuing through Monday night. Heaviest rainfall rates anticipated Monday into Monday night. Significant rainfall totals will bring potential for rapid rises on streams and creeks, rock and debris slides and runoff issues in poor drainage areas. Those recreating in the backcountry should take caution on backcountry roadways for falling debris. |
