Freezing Fog Advisory issued December 5 at 5:17PM PST until December 6 at 11:00AM PST by NWS Pendleton OR
* WHAT...Visibility one quarter of a mile or less in freezing fog. * WHERE...John Day Basin. * WHEN...Until 11 AM PST Friday. * IMPACTS...Low visibility and slick roads could make driving conditions hazardous.
Dense Fog Advisory issued December 5 at 4:03PM PST until December 6 at 11:00AM PST by NWS Portland OR
* WHAT...For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. For the Dense Fog Advisory, visibility frequently below one quarter mile in dense fog and areas of freezing fog. * WHERE...South Willamette Valley. * WHEN...For the Air Stagnation Advisory, until 4 AM PST Saturday. For the Dense Fog Advisory, until 11 AM PST Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. * ADDITIONAL DETAILS...Fog
Freezing Fog Advisory issued December 5 at 5:03PM MST until December 6 at 11:00AM MST by NWS Missoula MT
* WHAT...Visibility to one quarter mile in freezing fog. * WHERE...Missoula/Bitterroot Valleys. * WHEN...Until 11 AM MST Friday. * IMPACTS...Low visibility could make driving conditions hazardous. Watch out for black ice, particularly on bridges.
Dense Fog Advisory issued December 6 at 1:25AM MST until December 7 at 11:00AM MST by NWS Boise ID
* WHAT...For the Dense Fog Advisory, visibility one quarter mile or less in dense fog. For the Air Stagnation Advisory in valleys, 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...Treasure Valley Zones and the Weiser Basin. * WHEN...For the Dense Fog Advisory, until 11 AM MST Saturday. For the Air Stagnation Advisory, until 5 PM MST Saturday. * IMPACTS...Low visibility could make driving conditions hazardous. Poor air quality may cause issues for people with respiratory problems. * ADDITIONAL
High Wind Watch issued December 6 at 1:42AM MST until December 7 at 11:00AM MST by NWS Cheyenne WY
* WHAT...For the first High Wind Watch, west winds 25 to 35 mph with gusts up to 60 mph possible. For the second High Wind Watch, west winds 35 to 45 mph with gusts up to 75 mph possible. * WHERE...Bordeaux area along Interstate 25 between Chugwater and Wheatland. * WHEN...For the first High Wind Watch, from this evening through Saturday morning. For the second High Wind Watch, from Saturday evening through late Sunday night. * 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 5 at 8:59AM PST until December 5 at 11:00AM PST by NWS Spokane WA
* WHAT...Freezing drizzle and freezing fog. * WHERE...Cheney, Airway Heights, Medical Lake, and Davenport. * WHEN...Until 11 AM PST this morning. * IMPACTS...Freezing drizzle and freezing fog are leading to slick conditions. This will impact travel especially on I-90 and US-2. Use extra caution, reduce speeds, and allow extra travel time.
Freezing Fog Advisory issued December 4 at 10:18PM PST until December 5 at 11:00AM PST by NWS Portland OR
* WHAT...For the Freezing Fog Advisory, visibility one quarter mile or less in fog and freezing fog. For the Air Stagnation Advisory, light winds and limited air movement will lead to a period of stagnant air conditions. This scenario could result in the build up of air pollutants over time. * WHERE...South Willamette Valley. * WHEN...For the Air Stagnation Advisory, until 4 AM PST Saturday. For the Freezing Fog Advisory, until 11 AM PST Thursday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems. Low visibility could make driving conditions hazardous. With temperatures at or just below
Freezing Fog Advisory issued December 4 at 5:42PM PST until December 5 at 11:00AM PST by NWS Pendleton OR
* WHAT...Visibility one quarter mile or less in freezing fog. * WHERE...Central Oregon. * WHEN...Until 11 AM PST Thursday. * IMPACTS...Low visibility and slick roads could make driving conditions hazardous.
High Wind Watch issued December 5 at 1:31AM MST until December 8 at 11:00AM MST by NWS Great Falls MT
* WHAT...Southwest winds 35 to 50 mph with gusts up to 85 mph possible. * WHERE...The Rocky Mountain Front and adjacent foothills and plains. * WHEN...From Friday afternoon through Sunday morning. * IMPACTS...High winds may move loose debris, damage property and cause power outages. Travel could be difficult, especially for high profile vehicles. * ADDITIONAL DETAILS...After a period of stronger winds Friday evening, a brief lull in the strongest winds is forecast early Saturday before the strongest period of winds Saturday night.
Dense Fog Advisory issued December 5 at 1:31AM MST until December 5 at 11:00AM MST by NWS Great Falls MT
* WHAT...For the Dense Fog Advisory, visibility one-half mile or less in dense freezing fog. For the High Wind Watch, west winds 30 to 40 mph with gusts up to 70 mph possible. * WHERE...Eastern Glacier, Western Toole, and Central Pondera Counties. * WHEN...For the Dense Fog Advisory, until 11 AM MST this morning. For the High Wind Watch, from Friday afternoon through Sunday morning. * IMPACTS...Through this morning...low visibility and icy roadways could make driving conditions hazardous. Friday evening into Sunday morning...high winds may move loose debris, damage property and cause power outages. Travel could also be difficult, especially