Yellowstone National Park, Wyoming
Regional Weather Alerts
| Alert: | Severe Thunderstorm Warning |
| Area(s): | Rosebud, MT |
| Effective: | 2026-07-16 @ 11:46 pm -> 2026-07-17 @ 12:30 am |
| Onset: | 2026-07-16 @ 11:46 pm -> 2026-07-17 @ 12:30 am |
| Severity: | Severe |
| Certainty: | Observed |
| Urgency: | Immediate |
| Issued By: | NWS Billings MT on 2026-07-16 @ 11:46 pm |
| Headline: | Severe Thunderstorm Warning issued July 16 at 10:46PM MDT until July 16 at 11:30PM MDT by NWS Billings MT |
| Description: |
SVRBYZ The National Weather Service in Billings has issued a * Severe Thunderstorm Warning for... Central Rosebud County in southeastern Montana... * Until 1130 PM MDT. * At 1046 PM MDT, a severe thunderstorm was located near Forsyth, moving northeast at 10 mph. HAZARD...70 mph wind gusts and half dollar size hail. SOURCE...Radar indicated. IMPACT...Hail damage to vehicles is expected. Expect considerable tree damage. Wind damage is also likely to mobile homes, roofs, and outbuildings. * Locations impacted include... Forsyth. |
| Alert: | Flood Advisory |
| Area(s): | Rosebud, MT; Treasure, MT; Yellowstone, MT |
| Effective: | 2026-07-16 @ 11:24 pm -> 2026-07-17 @ 2:15 am |
| Onset: | 2026-07-16 @ 11:24 pm -> 2026-07-17 @ 2:15 am |
| Severity: | Minor |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-07-16 @ 11:24 pm |
| Headline: | Flood Advisory issued July 16 at 10:24PM MDT until July 17 at 1:15AM MDT by NWS Billings MT |
| Description: |
A line of thunderstorms producing very heavy rain is impacting locations along Interstate 94 from Custer to Forsyth. * WHAT...Flooding caused by excessive rainfall is expected. * WHERE...East Central Yellowstone County in south central Montana... Rosebud County in southeastern Montana... Central Treasure County in southeastern Montana... * WHEN...Until 115 AM MDT. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Water over roadways. Ponding of water in urban areas. * ADDITIONAL DETAILS... - At 1020 PM MDT, Doppler radar indicated heavy rain due to thunderstorms. Minor flooding is ongoing or expected to begin shortly in the advisory area. - Travel on Interstate 94 between Custer and Forsyth will be impacted by poor visibility and ponded water. Drive carefully! - Some locations that will experience flooding include... Forsyth, Custer and Bighorn. - http://www.weather.gov/safety/flood |
| Alert: | Flood Advisory |
| Area(s): | Musselshell, MT; Rosebud, MT; Treasure, MT; Yellowstone, MT |
| Effective: | 2026-07-16 @ 9:43 pm -> 2026-07-17 @ 12:30 am |
| Onset: | 2026-07-16 @ 9:43 pm -> 2026-07-17 @ 12:30 am |
| Severity: | Minor |
| Certainty: | Likely |
| Urgency: | Expected |
| Issued By: | NWS Billings MT on 2026-07-16 @ 9:43 pm |
| Headline: | Flood Advisory issued July 16 at 8:43PM MDT until July 16 at 11:30PM MDT by NWS Billings MT |
| Description: |
Thunderstorms with very heavy rain will produce localized flooding across the area this evening. * WHAT...Areas of flooding caused by excessive rainfall are expected. * WHERE...Musselshell County in central Montana... Northeastern Yellowstone County in south central Montana... Northern Rosebud County in southeastern Montana... Northern Treasure County in southeastern Montana... * WHEN...Until 1130 PM MDT. * IMPACTS...Expect localized flooding in low-lying and poor drainage areas, rises in small streams and normally dry drainages, ponding of water in urban areas. * ADDITIONAL DETAILS... - At 836 PM MDT, Doppler radar indicated heavy rain due to thunderstorms. Flooding is ongoing or expected to begin shortly in the advisory area. Between 1 and 2 inches of rain have fallen, and pockets of very heavy rain continue. - Additional rainfall amounts up to 1 inch are expected over the area. This additional rain will result in areas of flooding. - Some locations that may experience flooding include... Roundup, Hysham, Melstone, Musselshell, Klein and Ingomar. - The heaviest rain is occurring north of Interstate 94. - http://www.weather.gov/safety/flood |
| Alert: | Flash Flood Watch |
| Area(s): | Big Belt, Bridger and Castle Mountains |
| Effective: | 2026-07-15 @ 12:51 pm -> 2026-07-17 @ 1:00 am |
| Onset: | 2026-07-16 @ 3:00 pm -> 2026-07-17 @ 1:00 am |
| Severity: | Severe |
| Certainty: | Possible |
| Urgency: | Future |
| Issued By: | NWS Great Falls MT on 2026-07-15 @ 12:51 pm |
| Headline: | Flash Flood Watch issued July 15 at 11:51AM MDT until July 17 at 12:00AM MDT by NWS Great Falls MT |
| Description: |
* WHAT...Flash flooding and debris flows caused by excessive rainfall are possible over the Horse Gulch Burn Scar. * WHERE...A portion of central Montana, including the following area, Big Belt, Bridger and Castle Mountains. * WHEN...From Thursday afternoon through Thursday evening. * IMPACTS...Heavy rainfall over the Horse Gulch Burn Scar is expected up to and during the period of the watch. Rainfall rates of 0.25 to 0.75 of an inch per hour are possible with thunderstorms. Residents near the Horse Gulch Burn Scar should prepare for potential debris flow. Be sure to stay up to date with information from local authorities. Heavy rainfall could trigger flash flooding of low-lying areas, urbanized street flooding, and debris flows in and near recent wildfire burn scars. * ADDITIONAL DETAILS... - National Weather Service Meteorologists are forecasting heavy rainfall over the burn scar, which may lead to flash flooding and debris flows. - Some locations that may experience flash flooding include... Maudlow, Trident and York. - http://www.weather.gov/safety/flood |