Winter Storm Warning issued December 14 at 1:14AM MST until December 15 at 5:00PM MST by NWS Riverton WY
* WHAT...Heavy snow. Total snow accumulations of 10 to 16 inches expected. Snow accumulations of 2 to 4 inches are expected along South Pass. Winds gusting as high as 50 mph. * WHERE...Salt River and Wyoming Ranges and the Western Wind River Mountains. * WHEN...From 11 AM this morning to 5 PM MST Sunday. * IMPACTS...Travel could be very difficult to impossible along mountain passes, including Salt River Pass and South Pass. * ADDITIONAL DETAILS...Along South Pass, though snowfall amounts will be lesser than the rest of the mountain range, very strong winds with gusts around 50 mph will lead
High Wind Warning issued December 14 at 12:52AM MST until December 15 at 5:00PM MST by NWS Riverton WY
* WHAT...Southwest winds 25 to 35 mph with gusts 55 to 65 mph expected. * WHERE...Natrona County Lower Elevations. * WHEN...From 7 PM this evening to 5 PM MST Sunday. * IMPACTS...Strong winds may impact travel for light and high profile vehicles Saturday night through Sunday morning, especially along Outer Drive in Casper. * ADDITIONAL DETAILS...Strongest winds will occur along WY Hwy 258 Outer Drive on the south side of Casper, where gusts 65 to 70 mph are possible. For north Casper, there is only a 60% chance that winds will gust over 60 mph. Wind speeds will generally decrease
Winter Weather Advisory issued December 14 at 2:43AM MST until December 15 at 5:00PM MST by NWS Great Falls MT
* WHAT...Snow expected. Total snow accumulations between 4 and 8 inches near the Idaho border with locally higher amounts across the highest elevations in the Henrys Lake and Centennial ranges. Winds gusting as high as 40 mph. * WHERE...Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From 11 AM this morning to 5 PM MST Sunday. * IMPACTS...Travel could be very difficult over Targhee and Raynolds Passes. * ADDITIONAL DETAILS...Moderate to heavy snow likely near the Idaho border this afternoon. Lighter snow and winter weather impacts are expected further north across the Madison and Gallatin ranges.
Winter Storm Warning issued December 13 at 7:43PM MST until December 15 at 5:00PM MST by NWS Pocatello ID
* WHAT...Heavy snow expected. Total snow accumulations between 5 and 10 inches below 7000 feet. Total snow accumulations between 10 and 14 inches above 7000 feet with locally higher totals above pass level. Winds gusting as high as 35 mph Saturday night through Sunday. * WHERE...Big Hole Mountains, Centennial Mountains - Island Park, Teton Valley, Bear River Range, and Caribou Range. * WHEN...From 8 AM Saturday to 5 PM MST Sunday. * IMPACTS...Travel could be very difficult to impossible.
Winter Storm Watch issued December 13 at 12:17AM MST until December 15 at 5:00PM MST by NWS Riverton WY
* WHAT...Heavy snow possible. Total snow accumulations over 1 foot for southwest Yellowstone, 6 to 10 inches near Old Faithful, and up to 2 to 5 inches from Mammoth to Tower Junction. * WHERE...Yellowstone National Park. * WHEN...From Saturday afternoon through Sunday evening. * IMPACTS...Travel could be very difficult to impossible.
Winter Storm Watch issued December 13 at 1:20AM MST until December 15 at 5:00PM MST by NWS Pocatello ID
* WHAT...Heavy snow possible. Total snow accumulations between 5 and 12 inches possible for valley floors, and 10 to 20 inches above passes. Winds could gust as high as 35 mph. * WHERE...Big Hole Mountains, Centennial Mountains - Island Park, Teton Valley, Bear River Range, and Caribou Range. * WHEN...From Saturday morning through Sunday afternoon. * IMPACTS...Travel could be very difficult to impossible.
High Wind Warning issued December 13 at 3:07AM MST until December 14 at 5:00PM MST by NWS Cheyenne WY
* WHAT...West winds 30 to 40 mph with gusts up to 60 mph expected. * WHERE...North Snowy Range Foothills including Arlington and Elk Mountain along Interstate 80. * WHEN...From 8 PM this evening to 5 PM MST Saturday. * IMPACTS...Mainly to transportation. Strong cross winds will be hazardous to light weight or high profile vehicles, including campers and tractor trailers.
Gale Warning issued December 12 at 6:09AM EST until December 12 at 5:00PM EST by NWS Boston/Norton MA
* WHAT...West winds 20 to 25 kt with gusts up to 40 kt and seas 5 to 8 feet. * WHERE...In Massachusetts coastal waters, Nantucket Sound, Vineyard Sound and Buzzards Bay. In Rhode Island coastal waters, Rhode Island Sound and Block Island Sound. * WHEN...Until 5 PM EST this afternoon. * IMPACTS...Strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility.
High Wind Warning issued December 11 at 1:29AM MST until December 11 at 5:00PM MST by NWS Cheyenne WY
* WHAT...West winds 30 to 40 mph with gusts up to 65 mph possible. * WHERE...South Laramie Range and Foothills including the Interstate 80 Summit between Cheyenne and Laramie, and North Snowy Range Foothills including Arlington and Elk Mountain along Interstate 80. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Mainly to transportation. Strong cross winds will be hazardous to light weight or high profile vehicles, including campers and tractor trailers.
Winter Weather Advisory issued December 11 at 12:59AM MST until December 11 at 5:00PM MST by NWS Rapid City SD
* WHAT...Snow. Additional snow accumulations between 2 and 4 inches. * WHERE...In South Dakota, Northern Black Hills. In Wyoming, Wyoming Black Hills. * WHEN...Until 5 PM MST this afternoon. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Wednesday morning and evening commutes.