DOUGLAS COUNTY, Ore. -- The National Weather Service has issued an air stagnation advisory, that will last through Thursday.
According to forecasts, strong high pressure will settle over our area, bringing an increase in trapped pollution.
Officials say smoke from wood stoves will become trapped as well, making the air quality even worse.
Authorities say people with asthma and breathing conditions should be aware of the drop in air quality.
The NOAA says that the pollutants will mostly be trapped in the valleys from Roseburg south to Jackson County.
Air Stagnation Advisory
URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE MEDFORD OR 1146 AM PST MON JAN 14 2013 ORZ023>026-150400- /O.CON.KMFR.AS.Y.0001.000000T0000Z-130117T2100Z/ CENTRAL DOUGLAS COUNTY-EASTERN CURRY COUNTY AND JOSEPHINE COUNTY- EASTERN DOUGLAS COUNTY FOOTHILLS-JACKSON COUNTY- INCLUDING THE CITIES OF...ROSEBURG...GREEN...MYRTLE CREEK... CANYONVILLE...GRANTS PASS...CAVE JUNCTION...STEAMBOAT...MEDFORD... ASHLAND 1146 AM PST MON JAN 14 2013 ...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 1 PM PST THURSDAY... AN AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 1 PM PST THURSDAY. * SYNOPSIS...STRONG HIGH PRESSURE WILL SETTLE OVER THE AREA. STRONG AND PERSISTENT TEMPERATURE INVERSIONS WILL DEVELOP OVER THE VALLEYS. THESE INVERSIONS WILL TRAP POLLUTANTS IN THE VALLEYS...AND AIR QUALITY WILL DETERIORATE THROUGH MOST OF THE WEEK. * LOCATIONS INCLUDE: ROSEBURG...GREEN...MYRTLE CREEK... CANYONVILLE...STEAMBOAT...CAVE JUNCTION...GRANTS PASS... MEDFORD...ASHLAND. * IMPACTS...POLLUTANTS MAY REACH UNHEALTHFUL LEVELS THIS WEEK. * FOR A DETAILED VIEW OF THE HAZARD AREA...VISIT HTTP://WWW.WRH.NOAA.GOV/WRH/WHV/?WFO=MFR PRECAUTIONARY/PREPAREDNESS ACTIONS... AN AIR STAGNATION ADVISORY INDICATES THAT DUE TO LIMITED MOVEMENT OF AN AIRMASS ACROSS THE ADVISORY AREA...POLLUTION WILL INCREASE.