AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE PENDLETON OR 542 AM PST FRI MAR 7 2014 CANCELED FLOOD WATCH .SHORT TERM...TODAY THROUGH SUNDAY...A DEPARTING WEATHER SYSTEM EARLY THIS MORNING HAS LEFT A FEW SHOWERS IN ITS WAKE OVER THE NORTHERN BLUE MOUNTAINS WITH ADDITIONAL SHOWERS NEAR THE CREST OF THE CASCADES. THESE HAVE BEEN DECREASING AND EXPECT THAT TO CONTINUE THROUGH THIS MORNING AND THE MOUNTAIN SHOWERS WILL END BY THIS AFTERNOON. HIGH PRESSURE ALOFT WILL BUILD OVER THE REGION TODAY AND CONTINUE INTO SATURDAY. HOWEVER...CLOUDS AND PRECIPITATION WILL INCREASE AGAIN OVER THE WASHINGTON CASCADE EAST SLOPES BY LATE SATURDAY AFTERNOON AND THEN IT WILL SPREAD OVER THE CWA FROM WEST TO EAST SATURDAY NIGHT AND SUNDAY. SNOW LEVELS HAVE LOWERED AND THEREFORE SNOW MELT RUNOFF HAS DECREASED. RIVERS AND STREAMS HAVE BEEN DROPPING AREA WIDE. CURRENTLY THERE ARE NO MAIN STEM RIVERS FLOODING AND FLOODING IS NO LONGER EXPECTED. THEREFORE THE FLOOD WATCH FOR MUCH OF THE FORECAST AREA HAS BEEN CANCELLED. THE SMALL STREAM FLOOD ADVISORY FOR KITTITAS COUNTY WILL ALSO EXPIRE AT 6 AM THIS MORNING. TEMPERATURES WILL CONTINUE TO BE ABOUT 10 DEGREES ABOVE NORMAL TODAY WITH MAXIMUM READINGS IN THE UPPER 50S TO LOWER 60S IN THE LOWER ELEVATIONS AND 40S TO LOWER 50S OVER THE MOUNTAINS. WINDS HAVE DECREASED AND EXPECT ONLY LIGHT WINDS TODAY...THOUGH THERE COULD BE SOME LOCALLY BREEZY CONDITIONS THIS MORNING...MAINLY OVER THE OPEN TERRAIN OF THE LOWER COLUMBIA BASIN AND BLUE MOUNTAIN FOOTHILLS...AS WELL AS THE BLUE MOUNTAINS AND THE SIMCOE HIGHLANDS. 88 .LONG TERM...SUNDAY NIGHT THROUGH FRIDAY...THERE IS STRONG MODEL AGREEMENT ON A SHORTWAVE TROUGH AND ASSOCIATED COLD FRONT FOR LATE SUNDAY EVENING INTO MONDAY. SNOW LEVELS ARE EXPECTED TO BE HIGH WHEN THE BULK OF THE MOISTURE FALLS WITH THIS SYSTEM...THEREFORE NOT EXPECTING ANY SIGNIFICANT SNOW ACCUMULATIONS DURING THIS PERIOD. IN ADDITION...FRONTAL PASSAGE MAY BRING GUSTY WINDS TO THE AREA. PRECIPITATION IS EXPECTED TO GRADUALLY END TUESDAY AND WEDNESDAY...THOUGH A SLIGHT CHANCE OF SHOWERS MAY LINGER ALONG THE HIGHER ELEVATIONS. A FAIRLY STRONG RIDGE OF HIGH PRESSURE IS EXPECTED TO MOVE OVER THE AREA WEDNESDAY AND THURSDAY WITH DRIER CONDITIONS. THE GFS AND DGEX MODELS BRING IN A CLOSED LOW PRESSURE SYSTEM FOR LATE THURSDAY INTO FRIDAY...WITH THE ECMWF SWITCHING TO BRINGING A SHORTWAVE THROUGH LATE FRIDAY. HAVE OPTED TO GRADUALLY INCREASE POPS STARTING THURSDAY NIGHT INTO FRIDAY TO CAPTURE THIS POTENTIAL CHANGE...THOUGH ONLY KEPT MOST REGIONS TO A SLIGHT CHANCE OF SHOWERS.
Posted on: Fri, 07 Mar 2014 14:39:59 +0000
Trending Topics
Recently Viewed Topics
© 2015