A WEAK FRONTAL SYSTEM WILL PRODUCE EAST OR SOUTHEAST WINDSBETWEEN 5 AND 10 MPH ACROSS SOUTHEAST WASHINGTON AND THE SOUTHERN IDAHO PANHANDLE THIS AFTERNOON BRINGING IMPROVED DISPERSION TO PLACES LIKE LEWISTON, PULLMAN, SPOKANE AND COEUR D'ALENE. HOWEVER, WINDS WON'T INCREASE MUCH IN FAR NORTH IDAHO, THE SHELTERED VALLEYS OF NORTHEAST WASHINGTON, OR IN CENTRAL WASHINGTON UNTIL THURSDAY. THE AIR STAGNATION ADVISORY FOR CENTRAL WASHINGTON AND THE COUNTIES OF FAR NORTHEAST WASHINGTON WILL BE EXTENDED THROUGH NOON THURSDAY. * AIR QUALITY...LIGHT WINDS AND STABLE CONDITIONS WILL PERSIST THROUGH THURSDAY MORNING.

* TIMING...THROUGH THURSDAY MORNING. INCREASING WINDS AND PRECIPITATION THURSDAY AND FRIDAY WILL IMPROVE GROUND LEVEL DISPERSION.

* IMPACTS...AIR QUALITY WILL BE LOCALLY DEGRADED THROUGH THURSDAY MORNING. BEFORE BURNING LEAVES OR YARD WASTE, CHECK FOR LOCAL BURN BANS.