Winter Weather Advisory issued February 22 at 1:50PM MST until February 24 at 11:00AM MST by NWS Pocatello ID
* WHAT...Snow expected above 7000 feet with a rain and snow mix below 7000 feet. Total snow accumulations above 7000 feet of 5 to 10 inches with 10 to 20 inches above pass level. Total snow accumulations below 7000 feet of 1 to 5 inches. Winds gusting as high as 40 mph across higher elevations. * WHERE...Sawtooth/Stanley Basin and Sun Valley Region. * WHEN...From 2 AM Sunday to 11 AM MST Monday. * IMPACTS...Travel could be difficult at times, especially over Galena Summit. The hazardous conditions could impact the Monday morning commute.
Hydrologic Outlook issued February 22 at 5:15AM MST by NWS Boise ID
ESFBOI Moderate to heavy rain and low elevation snowmelt Sunday and Monday will lead to rises on rivers, creeks, and streams across portions of southeast Oregon and southwest Idaho (particularly the Weiser River Basin). Saturated or frozen soils in some areas will increase runoff. Snow and ice may clog culverts and ditches causing water to back-up and pond in low lying and poor drainage areas. Additionally, ice jams could develop on any rivers, creeks, or streams with existing ice cover and cause localized flooding. Rivers in these areas will continue to run high through next week with some waterways potentially
Flood Watch issued February 22 at 3:56AM MST until February 24 at 2:00PM MST by NWS Missoula MT
* WHAT...Flooding caused by rain and/or snowmelt and/or ice jam continues to be possible. * WHERE...Clearwater and Idaho Counties in Idaho. * WHEN...From 2 PM MST /1 PM PST/ this afternoon through Monday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, 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. Runoff will increase the risk for rock and mudslides below steep terrain. * ADDITIONAL DETAILS... - An atmospheric river will bring a significant warm up along with widespread rain through Monday
High Wind Warning issued February 21 at 2:53PM MST until February 25 at 11:00PM MST by NWS Cheyenne WY
* WHAT...West winds 30 to 40 mph with gusts up to 60 mph Saturday into Sunday morning. Gusts up to 75 mph are anticipated Sunday afternoon onwards. * WHERE...North Snowy Range Foothills including Arlington and Elk Mountain along Interstate 80. * WHEN...From 9 AM Saturday to 11 PM MST Tuesday. * IMPACTS...Mainly to transportation. Strong cross winds will be hazardous to light weight or high profile vehicles, including campers and tractor trailers. In addition, areas of blowing snow could lead to reduced visibility, even whiteout conditions, and slick roads. * ADDITIONAL DETAILS...This will be a long duration wind event. While
High Wind Watch issued February 21 at 2:53PM MST until February 25 at 11:00PM MST by NWS Cheyenne WY
* WHAT...West winds 30 to 40 mph with gusts up to 60 mph Saturday night into Sunday morning. Gusts up to 75 mph are anticipated Sunday afternoon onwards. * WHERE...South Laramie Range and Foothills including the Interstate 80 Summit between Cheyenne and Laramie. * WHEN...From Saturday evening through Tuesday evening. * IMPACTS...Mainly to transportation. Strong cross winds will be hazardous to light weight or high profile vehicles, including campers and tractor trailers. In addition, areas of blowing snow could lead to reduced visibility and slick roads. * ADDITIONAL DETAILS...This will be a long duration wind event. While strong winds with
Hydrologic Outlook issued February 21 at 11:50AM MST by NWS Riverton WY
ESFRIW Low elevation snowpack of around 6 to 12 inches exists across much of the northern portion of the Bighorn Basin including Greybull, Lovell, Powell, and Cody. This snowpack contains an estimated 2 to 4 inches of Snow Water Equivalent (SWE). Temperatures beginning Sunday are expected to climb into the mid 40s to low 50s. The warm temperatures are expected to persist through at least the middle of next week. The warm temperatures, combined with the significant low elevation snowpack, could result in significant melting and injection into local rivers and streams. Ice break up on the Bighorn and Nowood
Avalanche Advisory issued February 21 at 6:47AM MST by NWS Salt Lake City UT
SABSLC * WHAT...The avalanche danger is considerable in many areas. * WHERE...For the mountains of Utah, including the Wasatch Range, Bear River Range, Uinta Mountains, Wasatch Plateau, and Manti Skyline. * WHEN...In effect from 6 AM MST this morning to 6 AM MST Sunday. * IMPACTS...A series of storms in the last week has left a thick blanket of snow at all elevations, creating excellent powder riding conditions while also elevating the backcountry avalanche danger. Don't let the fresh snow and sunshine influence your decision-making - avalanche conditions remain dangerous, and careful snowpack and terrain analysis are required for backcountry
High Wind Warning issued February 21 at 3:15PM MST until February 24 at 5:00PM MST by NWS Billings MT
* WHAT...West winds 30 to 40 mph with gusts up to 65 mph expected. * WHERE...Judith Gap, Southern Wheatland, Melville Foothills, and Northern Sweet Grass. * WHEN...From 5 AM Saturday to 5 PM MST Monday. * IMPACTS...Strong crosswinds will make travel difficult along Interstate 90 around Big Timber and Highway 191 from Big Timber into Judith Gap. * ADDITIONAL DETAILS...The strongest winds are expected Saturday night through Sunday.
Wind Advisory issued February 21 at 3:15PM MST until February 24 at 5:00PM MST by NWS Billings MT
* WHAT...Southwest wind gusts of 60 to 70 mph expected. * WHERE...Beartooth Foothills and Livingston Area. * WHEN...From 8 PM this evening to 5 PM MST Monday. * IMPACTS...Travel along Interstate 90 will be impacted by strong crosswinds. Gusty winds will blow around unsecured objects. * ADDITIONAL DETAILS...The strongest winds are expected Saturday night through Sunday. A brief period of localized blowing and drifting snow is possible tonight into Saturday morning.
High Wind Watch issued February 21 at 1:30PM MST until February 23 at 11:00PM MST by NWS Great Falls MT
* WHAT...Southwest winds 25 to 40 mph with gusts up to 65 mph possible. * WHERE...The Interstate 15 Corridor north of Power, Southern Rocky Mountain Front and adjacent foothills and plains, Cascade County below 5000ft, and Judith Basin County and Judith Gap. * WHEN...From Saturday evening through Sunday evening. * IMPACTS...Travel could be difficult, especially for high profile vehicles.