High Wind Watch issued January 15 at 4:24PM MST until January 17 at 11:00AM MST by NWS Cheyenne WY
* WHAT...West winds 30 to 40 mph with gusts up to 65 mph possible. * WHERE...South Laramie Range including the Interstate 80 Summit between Cheyenne and Laramie. * WHEN...From Thursday morning through Friday morning. * IMPACTS...Mainly to transportation. Strong cross winds will be hazardous to light weight or high profile vehicles, including campers and tractor trailers.
Air Stagnation Advisory issued January 15 at 3:41AM MST until January 17 at 11:00AM MST by NWS Boise ID
* WHAT...An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. * WHERE...Portions of south central, southwest, and west central Idaho and northeast and southeast Oregon. * WHEN...Until 11 AM MST /10 AM PST/ Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
Air Stagnation Advisory issued January 14 at 1:27PM MST until January 17 at 11:00AM MST by NWS Boise ID
* WHAT...An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. * WHERE...Portions of southwest Idaho and southeast Oregon. * WHEN...Until 11 AM MST /10 AM PST/ Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
Winter Weather Advisory issued January 13 at 12:48PM MST until January 14 at 11:00AM MST by NWS Rapid City SD
* WHAT...Snow. Additional snow accumulations between 3 and 7 inches. The highest amounts will be between Cheyenne Crossing, Buckhorn and Moskee. * WHERE...In South Dakota, Northern Black Hills. In Wyoming, Wyoming Black Hills. * WHEN...Until 11 AM MST Tuesday. * IMPACTS...Plan on slippery road conditions. The hazardous conditions could impact the Monday evening and Tuesday morning commutes.
Cold Weather Advisory issued January 13 at 8:56PM EST until January 14 at 11:00AM EST by NWS Baltimore MD/Washington DC
* WHAT...For the first Cold Weather Advisory, very cold wind chills as low as 15 below expected. For the second Cold Weather Advisory, very cold wind chills as low as 22 below expected. * WHERE...In Maryland, Garrett County. In Virginia, Western Highland County. In West Virginia, Western Grant and Western Pendleton Counties. * WHEN...For the first Cold Weather Advisory, from 1 AM to 11 AM EST Tuesday. For the second Cold Weather Advisory, from 6 PM Tuesday to noon EST Wednesday. * IMPACTS...The cold wind chills as low as 15 below zero could result in hypothermia if precautions are not
Air Stagnation Advisory issued January 13 at 1:24PM MST until January 17 at 11:00AM MST by NWS Boise ID
* WHAT...An extended period of stagnant air, with light winds and little vertical mixing. This is due to an inversion near the surface that will continue to trap pollutants. * WHERE...Portions of south central, southwest, and west central Idaho and northeast and southeast Oregon. * WHEN...From 9 PM MST /8 PM PST/ this evening to 11 AM MST /10 AM PST/ Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
Winter Weather Advisory issued January 11 at 5:01PM MST until January 12 at 11:00AM MST by NWS Rapid City SD
* WHAT...Snow. Additional snow accumulations between 1 and 3 inches. Winds gusting as high as 45 mph. * WHERE...Northern Campbell and Western Crook. * WHEN...Until 11 AM MST Sunday. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Visibilities may drop below 1/4 mile due to falling and blowing snow. Plan on slippery road conditions. Gusty winds could bring down tree branches.
Winter Weather Advisory issued January 11 at 10:26AM MST until January 12 at 11:00AM MST by NWS Missoula MT
* WHAT...Snow. Likelihood of ongoing minor to moderate impacts from 1 to 3 inches of snow is greater than 80 percent, and 3 to 6 inches of snow is 25 percent. * WHERE...Highway 11 Pierce to Headquarters, Elk River, Pierce, Highway 12 Bald Mountain to Lolo Pass, Elk City, and Dixie. * WHEN...Until 10 AM PST Sunday. * IMPACTS...Winter traveling conditions. For MINOR impacts from snow, expect a few inconveniences to normal activities. For MODERATE impacts from snow, expect longer travel times to reach your destination. Use caution while driving, especially around curves.
Winter Weather Advisory issued January 11 at 5:47AM MST until January 11 at 11:00AM MST by NWS Missoula MT
* WHAT...Snow. Likelihood of developing or ongoing minor to moderate impacts from around 1 to 3 inches of snow is 50 percent, and 3 to 6 inches of snow is 10 percent. * WHERE...Greer Grade, Camas Prairie, and Grangeville and vicinity. * WHEN...Until 10 AM PST this morning. * IMPACTS...For MINOR impacts from snow, expect a few inconveniences to normal activities. Use caution while driving. Winter traveling conditions.
High Wind Warning issued January 10 at 5:05PM MST until January 11 at 11:00AM MST by NWS Cheyenne WY
* WHAT...West winds 30 to 50 mph with gusts up to 80 mph. * WHERE...Bordeaux area along Interstate 25 between Chugwater and Wheatland. * WHEN...Until 11 AM MST Saturday. * 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.