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Winter Weather Advisory issued January 9 at 3:07PM PST until January 11 at 6:00AM PST by NWS Seattle WA

2 months 3 weeks ago
* WHAT...Snow expected at or above elevations greater than 2500 ft. Total snow accumulations up to 6 to 12 inches. * WHERE...West Slopes North Central Cascades and Passes. * WHEN...From 6 AM Friday to 6 AM PST Saturday. * IMPACTS...Travel could be very difficult. * ADDITIONAL DETAILS...Convergence zone showers late Friday may locally enhance snowfall amounts and cause heavy snow at times through the central Cascade Passes.
NWS

Air Stagnation Advisory issued January 9 at 1:15PM MST until January 10 at 11:00AM MST by NWS Boise ID

2 months 3 weeks ago
* 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 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.
NWS

Air Stagnation Advisory issued January 9 at 9:54AM PST until January 10 at 12:00PM PST by NWS Medford OR

2 months 3 weeks ago
* WHAT...Strong valley inversions will result in weak winds, poor mixing and ventilation. This will result in stagnant air conditions that will trap pollutants near the surface. * WHERE...Lake County and eastern Klamath County, and Klamath Basin. This includes the cities of Klamath Falls and Lakeview. * WHEN...Until noon PST Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
NWS

Air Stagnation Advisory issued January 9 at 9:54AM PST until January 10 at 12:00PM PST by NWS Medford OR

2 months 3 weeks ago
* WHAT...Strong valley inversions will result in weak winds, poor mixing and ventilation. This will result in stagnant air conditions that will trap pollutants near the surface. * WHERE...For the Air Stagnation Advisory, Central Douglas County, Eastern Curry County and Josephine County, and Jackson County. This includes the cities of Roseburg, Grants Pass, Cave Junction and Medford. * WHEN...Until noon PST Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
NWS

Special Weather Statement issued January 9 at 6:12AM PST by NWS Pendleton OR

2 months 3 weeks ago
Patchy dense freezing fog has developed along the Highway 97 corridor south of Bend, as visibilities of one quarter of a mile or less have been observed on area webcams and local weather stations. Fog is expected to persist through the morning, likely dissipating around 11 AM. motorists are urged to use caution as visibilities may vary or change drastically, and roadways may be slick due to ice depositing on the road surface.
NWS

Winter Weather Advisory issued January 9 at 5:33AM PST until January 11 at 6:00AM PST by NWS Seattle WA

2 months 3 weeks ago
* WHAT...Snow expected at or above elevations greater than 2500 ft. Total snow accumulations up to 8 to 12 inches. * WHERE...West Slopes North Central Cascades and Passes. * WHEN...From 6 AM Friday to 6 AM PST Saturday. * IMPACTS...Travel could be very difficult to impossible. * ADDITIONAL DETAILS...Convergence zone showers late Friday may locally enhance snowfall amounts and cause heavy snow at times through the central Cascade Passes.
NWS

Air Stagnation Advisory issued January 9 at 12:48AM PST until January 10 at 12:00PM PST by NWS Medford OR

2 months 3 weeks ago
* WHAT...Strong valley inversions will result in weak winds, poor mixing and ventilation. This will result in stagnant air conditions that will trap pollutants near the surface. * WHERE...Lake County and eastern Klamath County, and Klamath Basin. This includes the cities of Klamath Falls and Lakeview. * WHEN...Until noon PST Friday. * IMPACTS...Poor air quality may cause issues for people with respiratory problems.
NWS