000 FLUS46 KPDT 091250 HWOPDT HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PENDLETON OREGON 450 AM PST TUE NOV 9 2004 ORZ041>050-WAZ024>030-101300- NORTH CENTRAL OREGON-CENTRAL OREGON-LOWER COLUMBIA BASIN (OR)- FOOTHILLS OF THE BLUE MOUNTAINS (OR)-BLUE MOUNTAINS-JOHN DAY BASIN- OCHOCO-JOHN DAY HIGHLANDS-GRANDE RONDE VALLEY-WALLOWA COUNTY- EASTERN COLUMBIA RIVER GORGE (WA)- EAST SLOPES OF THE SOUTHERN CASCADES-KITTITAS VALLEY-YAKIMA VALLEY- LOWER COLUMBIA BASIN (WA)-FOOTHILLS OF THE BLUE MOUNTAINS (WA)- NORTHWEST BLUE MOUNTAINS- 450 AM PST TUE NOV 9 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL AND NORTHEAST OREGON AS WELL AS SOUTH CENTRAL AND SOUTHEAST WASHINGTON. .DAY ONE... HIGH PRESSURE ALOFT WILL ALLOW DRY AND STABLE CONDITIONS TO PERSIST ACROSS THE REGION. IT WILL ALSO COMBINE WITH LIGHT WINDS AND STRONG SURFACE BASED INVERSIONS TO CREATE POOR AIR QUALITY ACROSS THE WASHINGTON PORTIONS OF THE LOWER COLUMBIA BASIN AND BLUE MOUNTAIN FOOTHILLS...AS WELL AS THE YAKIMA AND KITTITAS VALLEYS. THEREFORE...AN AIR STAGNATION ADVISORY HAS BEEN ISSUED THROUGH MONDAY FOR THESE AREAS. FOR MORE INFORMATION...PLEASE REFER TO PDXASAPDT (AEUS46 KPDT). THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN... A LOW PRESSURE SYSTEM WILL PASS SOUTH OF THE REGION WEDNESDAY AND THURSDAY WITH PRECIPITATION THREAT ACROSS CENTRAL OREGON. ANOTHER WEATHER SYSTEM COULD MOVE INTO THE REGION LATE THIS WEEKEND WITH ANOTHER CHANCE OF PRODUCING PRECIPITATION. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME. WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. PROTOTYPE GRAPHICAL FORECASTS OF WEATHER HAZARDS OUT TO SEVEN DAYS ARE DISPLAYED ON THE WORLD WIDE WEB AT: WWW.WRH.NOAA.GOV/PENDLETON/FORECAST/HWOGRAPHICS/HWOGRAPHICS.PHP ALL LETTERS IN THE ABOVE URL ARE LOWER CASE...EXCEPT THE G IN HWOGRAPHICS AND THE G IN HWOGRAPHICS.PHP. $$