SEVERE WX : Air Stagnation Advisory - Winter Weather Advisory View Alerts

Severe Weather Alerts

Last Updated: 8:42 PM

Air Stagnation Advisory

Areas Affected: Central Douglas County; Central and Eastern Lake County; Eastern Curry County and Josephine County; Eastern Douglas County Foothills; Jackson County; Klamath Basin; Northern and Eastern Klamath County and Western Lake County; Siskiyou Mountains and Southern Oregon Cascades; South Central Oregon Cascades

NWS Medford (Southwest Oregon and Northern California)

...AIR STAGNATION ADVISORY IN EFFECT FROM 5 PM THURSDAY TO 11 AM PST MONDAY...

* WHAT...High pressure over the area during the advisory period will result in light winds, strong valley inversions, and limited mixing. These conditions are likely to result in periods of diminished air quality during the advisory period.

* WHERE...The valleys of Central Douglas County, Eastern Curry County and Josephine County, Eastern Douglas County Foothills, Jackson County, South Central Oregon Cascades, Siskiyou Mountains and Southern Oregon Cascades, Klamath Basin, Northern and Eastern Klamath County and Western Lake County and Central and Eastern Lake County.

* WHEN...From 5 PM Thursday to 11 AM PST Monday.

* IMPACTS...Air stagnation is likely to result in diminishing air quality with time, especially in and near areas with significant sources of air pollution. Diminished air quality is likely to cause health issues for people with respiratory problems if precautions are not taken.

* ADDITIONAL DETAILS...An incoming frontal system is expected to result in improving air quality Monday afternoon.

* View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD

People with respiratory illness should follow their physician`s advice for dealing with diminished air quality. N95 masks are effective at filtering out the majority of harmful air particulates. State air quality agencies highly recommend that no outdoor burning occur and that residential wood burning devices be limited as much as possible. According to state air quality agencies, prolonged periods of stagnant air can hold pollutants close to the ground where people live and breathe. Check with your local burn agency for any current restrictions in your area.


Winter Weather Advisory

Areas Affected: Siskiyou Mountains and Southern Oregon Cascades; South Central Oregon Cascades

NWS Medford (Southwest Oregon and Northern California)

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 AM PST THURSDAY...

* WHAT...Snow showers. Additional snow accumulations of 1 to 4 inches in the advisory area. Hourly accumulation rates of one half to one inch per hour are expected in moderate to heavier showers this afternoon into this evening. Wind gusts of 20 to 30 mph are also expected in exposed mountainous areas resulting in reduced visibility due to blowing snow.

* WHERE...Southern Oregon Cascades from Howard Prairie northward and the Siskiyou Mountains near Mount Ashland. This includes Howard Prairie, Highway 140 near Fish Lake and Lake of the Woods, Highway 62 near Union Creek and Crater Lake, Highway 230 and 138 near Diamond Lake and Highway 58 near Crescent Lake.

* WHEN...Until 1 AM PST Thursday.

* IMPACTS...Difficult travel conditions are expected due to slippery road conditions and periods of reduced visibility due to blowing snow, especially from Highway 140 northward.

* View the hazard area in detail at https://www.wrh.noaa.gov/mfr/HAZARD

* Slow down and allow extra time to reach your destination. * Carry tire chains and be prepared for snow covered roads and limited visibilities. * See https://www.tripcheck.com or http://quickmap.dot.ca.gov for latest road conditions. * A Winter Weather Advisory for snow means that periods of snow will cause travel difficulties.


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