SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PORTLAND OR
400 PM PST WED DEC 29 2010
THE AIR MASS OVER NORTHWEST OREGON AND SOUTHWEST WASHINGTON IS
COOL AND UNSTABLE THIS AFTERNOON AND EVENING DUE TO THE RECENT
PASSAGE OF A COLD FRONT. THIS PATTERN CAN PRODUCE WHAT IS CALLED
COLD AIR FUNNEL CLOUDS. THESE FUNNELS DO NOT USUALLY TOUCH THE
GROUND. HOWEVER...IF THEY DO TOUCH THE GROUND THEY ARE DANGEROUS
AND CAN BE DAMAGING. HAD A THIRD PARTY REPORT OF WHAT APPEARS TO BE
ONE OF THESE NEAR TANGENT OREGON THIS AFTERNOON. IN THE LAST
HOUR...SOME THUNDERSTORMS HAVE BEGUN TO DEVELOP OVER PORTIONS OF
THE AREA. THE POTENTIAL FOR THIS EVENT SHOULD DECREASE AFTER SUNSET.
