Weather Alerts for Upper Snake River PlainIssued by the National Weather Service |
 WINTER STORM WATCH |
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| UPPER SNAKE RIVER PLAIN | ||
Areas Affected: Yellowstone National Park - Absaroka Mountains - Teton and Gros Ventre Mountains - Wind River Mountains West - Wind River Mountains East - Salt River and Wyoming Ranges |
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| Effective: Mon, 12/15 12:58pm | Updated: Mon, 12/15 11:05pm | Urgency: Future |
| Expires: Tue, 12/16 4:00am | Severity: Severe | Certainty: Possible |
Details:
* WHAT...Heavy snow possible. Total snow accumulations 6 to 10 inches above 8000 feet possible, with near 12 inches at the highest elevations. Widespread westerly winds gusting 40 to 60 mph, with isolated stronger winds. * WHERE...Portions of central, northwest, and west central Wyoming. * WHEN...From late Tuesday night through Wednesday evening. * IMPACTS...Travel will likely be very difficult, namely along mountain passes like Teton, Togwotee, and South Pass due to a combination of strong winds and falling snow reducing visibilities. * ADDITIONAL DETAILS...Areas of winds near 75 mph possible, especially for eastern mountain slopes, like the eastern Absaroka and Wind River Mountains. The heaviest snow occurs between about 1 AM and noon MST Wednesday. Information: Monitor the latest forecasts for updates on this situation. |
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 HIGH WIND WATCH |
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| UPPER SNAKE RIVER PLAIN | ||
Areas Affected: Shoshone/Lava Beds - Arco/Mud Lake Desert - Upper Snake River Plain - Lower Snake River Plain - Eastern Magic Valley - Southern Hills/Albion Mountains - Raft River Region - Marsh and Arbon Highlands - Blackfoot Mountains - Teton Valley - Lost River Valleys - Challis/Pahsimeroi Valleys - Wood River Foothills |
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| Effective: Mon, 12/15 3:08pm | Updated: Mon, 12/15 11:05pm | Urgency: Future |
| Expires: Tue, 12/16 4:30pm | Severity: Severe | Certainty: Possible |
Details:
* WHAT...Southwest winds 25 to 35 mph with gusts to 60 mph possible. * WHERE...Challis/Pahsimeroi Valleys, Lost River Valley, Wood River Foothills, Teton Valley, Eastern Magic Valley, Shoshone/Lava Beds, Arco/Mud Lake Desert,p to Blackfoot Mountains, Lower Snake River Plain, Marsh and Arbon Highlands, Raft River Region, Southern Hills/Albion Mountains, and Upper Snake River Plain. * WHEN...From 5 AM to 5 PM Wednesday. * IMPACTS...Travel could be difficult, especially for high profile vehicles. Isolated damage to trees, powerlines, signs, and outbuildings is possible, along with isolated power outages. Loose outdoor objects could be blown around. Information: Monitor the latest forecasts and warnings for updates on this situation. Secure loose objects or shelter objects in a safe location prior to the onset of winds. Drivers of high profile vehicles should consider scheduling travel outside the period of expected high winds. |
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| HIGH WIND WATCH |
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| UPPER SNAKE RIVER PLAIN | ||
Areas Affected: Big Hole Mountains - Lost River Range - Frank Church Wilderness - Sawtooth/Stanley Basin - Sun Valley Region - Big Lost Highlands/Copper Basin |
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| Effective: Mon, 12/15 3:08pm | Updated: Mon, 12/15 11:05pm | Urgency: Future |
| Expires: Tue, 12/16 4:30pm | Severity: Severe | Certainty: Possible |
Details:
* WHAT...West winds 25 to 35 mph with gusts up to 65 mph possible. 6 to 10 inches of snow above 7,000 feet combined with gusty winds could result in visibility reductions due to blowing and drifting snow. * WHERE...Big Lost Highlands/Copper Basin, Frank Church Wilderness, Lost River Range, Sawtooth/Stanley Basin, Sun Valley Region, and Big Hole Mountains. * WHEN...From 5 AM to 5 PM Wednesday. * IMPACTS...Travel could be difficult, especially for high profile vehicles. Isolated damage to trees, powerlines, signs, and outbuildings is possible, along with isolated power outages. Loose outdoor objects could be blown around. Blowing and drifting snow could result in decreased visibility. Information: Monitor the latest forecasts and warnings for updates on this situation. Secure loose objects or shelter objects in a safe location prior to the onset of winds. Drivers of high profile vehicles should consider scheduling travel outside the period of expected high winds. |
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