Weather Advisory

posted Jan 11, 2012, 4:07 PM by smike@guemesfire.org   [ updated Jan 11, 2012, 4:16 PM ]
214 PM PST WED JAN 11 2012.

..A COLD FRONT WILL BRING COLDER TEMPERATURES AND A CHANCE OF LOWLAND SNOW THIS WEEKEND.
..A SERIES OF ACTIVE STORM SYSTEMS NEXT WEEK WILL BRING PERIODS OF WINTER WEATHER TO WESTERN WASHINGTON...

A STRONG COLD FRONT IS FORECAST TO MOVE THROUGH WESTERN WASHINGTON LATER SATURDAY...USHERING IN A COLDER AIR MASS WHICH WILL LINGER INTO MONDAY. THIS WILL LOWER SNOW LEVELS TO NEAR 500 FEET SATURDAY NIGHT AND POTENTIALLY TO SEA-LEVEL SUNDAY MORNING. HIT AND MISS SHOWERS WILL DEVELOP WITH A THREAT OF A CONVERGENCE ZONE SETTING UP FROM SNOHOMISH COUNTY NORTHWARD LATE SATURDAY NIGHT AND SUNDAY. THE SHOWERS COMBINED WITH THE EXPECTED SNOW LEVEL BRINGS A THREAT OF SOME SNOW ACCUMULATIONS TO PARTS OF THE LOWLANDS. AT THIS TIME PREDICTING WHERE AND HOW MUCH SNOW WILL FALL THIS WEEKEND IS NOT POSSIBLE BUT IT IS MORE LIKELY OVER HILLTOPS AND UNDER THE CONVERGENCE ZONE AND HEAVIER SHOWERS.

...FROM TUESDAY ONWARD A SERIES OF STORM SYSTEMS WILL MOVE ACROSS THE PACIFIC NORTHWEST...BRINGING A THREAT FOR A VARIETY OF WINTER WEATHER TO WESTERN WASHINGTON. THESE STORMS WILL SPREAD SIGNIFICANT SNOW ACROSS THE MOUNTAINS RAISING THE POTENTIAL FOR AVALANCHES AND PERIODS OF DIFFICULT TRAVEL ACROSS THE PASSES. THE EXPECTED OVERALL AIR MASS OVER THE REGION THROUGH THIS PERIOD WILL BE COLD ENOUGH THAT THERE WILL CONTINUE TO BE A THREAT FOR PERIODS OF SNOW OVER THE LOWLANDS. VARIATIONS IN THE INTENSITY AND TRACK OF THESE SYSTEMS WILL SIGNIFICANTLY AFFECT THE PRECIPITATION TYPE AND AMOUNTS...

THE NATIONAL WEATHER WEATHER SERVICE WILL CONTINUE TO MONITOR THIS RISING POTENTIAL FOR WINTER WEATHER GOING INTO THE HOLIDAY WEEKEND AND THROUGH MUCH OF NEXT WEEK. STAY TUNED FOR FUTURE STATEMENTS AND FORECASTS FOR THE LATEST INFORMATION.
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