Freezing Fog Advisory
URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE PENDLETON OR 1138 AM PST THU JAN 15 2009 ORZ044-501-WAZ027>029-160700- /O.CAN.KPDT.FG.Y.0001.000000T0000Z-090115T2000Z/ /O.NEW.KPDT.ZF.Y.0001.090115T1938Z-090116T2300Z/ /O.CON.KPDT.AS.Y.0001.000000T0000Z-090121T0000Z/ LOWER COLUMBIA BASIN OF OREGON- FOOTHILLS OF THE BLUE MOUNTAINS OF OREGON-YAKIMA VALLEY- LOWER COLUMBIA BASIN OF WASHINGTON- FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON- INCLUDING THE CITIES OF...ARLINGTON...BOARDMAN...HERMISTON... HEPPNER...PENDLETON...SUNNYSIDE...YAKIMA...CONNELL...PROSSER... TRI-CITIES...DAYTON...WAITSBURG...WALLA WALLA 1138 AM PST THU JAN 15 2009 ...FREEZING FOG ADVISORY IN EFFECT UNTIL 3 PM PST FRIDAY... ...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST TUESDAY... ...DENSE FOG ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A FREEZING FOG ADVISORY...WHICH IS IN EFFECT UNTIL 3 PM PST FRIDAY. THE DENSE FOG ADVISORY HAS BEEN CANCELLED. AN AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST TUESDAY. A RIDGE OF HIGH PRESSURE WILL CONTINUE ACROSS EASTERN WASHINGTON AND EASTERN OREGON THIS WEEK AND INTO EARLY NEXT WEEK. LIGHT WINDS AND STRONG TEMPERATURE INVERSIONS WILL RESULT IN LITTLE MIXING OF THE AIR...WITH THE POTENTIAL FOR POLLUTANTS TO BE TRAPPED NEAR GROUND LEVEL. AN AIR STAGNATION ADVISORY INDICATES THAT DUE TO LIMITED MOVEMENT OF AN AIRMASS ACROSS THE ADVISORY AREA...POLLUTION WILL INCREASE. CHECK WITH YOUR LOCAL AIR QUALITY AGENCY FOR POSSIBLE RESTRICTIONS IN YOUR AREA. FOR ADDITIONAL WEATHER INFORMATION... CHECK OUR WEBSITE AT WWW.WEATHER.GOV/PENDLETON. TEMPERATURES WILL REMAIN AT OR BELOW FREEZING TODAY THROUGH FRIDAY MORNING ACROSS THE LOWER COLUMBIA BASIN...FOOTHILLS OF THE BLUE MOUNTAINS AND IN THE YAKIMA VALLEY. THEREFORE...AREAS OF FREEZING FOG...WITH OCCASIONAL SNOW FLURRIES AND LIGHT FREEZING DRIZZLE...WILL CONTINUE INTO TOMORROW. DRIVERS ARE URGED TO SLOW DOWN AND ALLOW FOR EXTRA TIME WHILE TRAVELING AS ROADWAYS MAY BE SLIPPERY...AND VISIBILITIES MAY DROP TO ONE HALF MILE OR LESS IN PLACES. A FREEZING FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE REDUCED TO ONE QUARTER MILE OR LESS WITH TEMPERATURES AT OR BELOW FREEZING. IF DRIVING...SLOW DOWN...USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU. ALSO...BE ALERT FOR ICE FORMING ON ROADWAYS...BRIDGES AND OVERPASSES. FOR ADDITIONAL WEATHER INFORMATION...CHECK OUR WEB SITE AT WWW.WEATHER.GOV/PENDLETON. $$