Weather Forecast Dec 4 2012 thru Dec 6 2012

Weather Forecast December 4, 2012 thru December 6, 2012

Weather Forecast Tuesday December 4 thru Thursday December 6, 2012. WEATHER FORECAST DEC 04 2012 – THU DEC 06 2012, U.S. OUTLOOK: HEAVY RAIN AND HIGHER ELEVATION SNOW FOR PARTS OF THE NORTHWEST, AND A NARROW BAND OF SHOWERS AND THUNDERSTORMS ASSOCIATED WITH A FRONT IN THE EASTERN U.S.

STORMY FORECAST FOR WESTERN U.S.: HEAVY RAIN AND SNOW TUESDAY. HEAVY RAIN MOVING ONSHORE INTO THE PACIFIC NORTHWEST AND NORTHERN CALIFORNIA. FLOOD WATCHES HAVE BEEN ISSUED FOR EXTREME NORTHERN CALIFORNIA, MUCH OF WESTERN OREGON, AND PARTS OF WESTERN WASHINGTON. FLOOD WARNINGS REMAIN IN EFFECT FOR THE SOUTHERN PART OF THE OLYMPIC PENINSULA. WINTER STORM WATCHES AND WINTER WEATHER ADVISORIES ARE IN EFFECT FOR THE CASCADES IN WASHINGTON STATE, AS WELL AS MUCH OF WESTERN WYOMING. HIGH WIND WATCHES, WARNINGS, AND WIND ADVISORIES ARE IN EFFECT FOR PORTIONS OF EXTREME NORTHERN CALIFORNIA AND SOUTHERN OREGON, PARTS OF COASTAL WASHINGTON STATE, AS WELL AS PARTS OF THE NORTHERN ROCKIES. THE UPPER LEVEL SYSTEM AND ASSOCIATED SURFACE FRONT IN THE PACIFIC NORTHWEST WILL CONTINUE TO BRING MODERATE RAIN FROM NORTHERN CALIFORNIA NORTHWARD INTO WASHINGTON. THE HEAVIEST OF THE RAIN SHOULD START COMING TO AN END BY WEDNESDAY MORNING, ONCE THE FRONT PUSHES FAR ENOUGH INLAND OVER THE NORTHERN ROCKIES.

IN THE REST OF THE U.S., AN EXPANSIVE AREA OF LOW PRESSURE WITH A CENTRAL PRESSURE OF 985 MB, 29.09 INCHES, REMAINED ANCHORED IN THE GULF OF ALASKA. A STRONG COLD FRONT, WHICH EXTENDS FROM NORTHERN QUEBEC SOUTHWESTWARD TO THE SOUTHERN HIGH PLAINS, WILL CONTINUE TO ADVANCE EASTWARD. SHOWERS ARE POSSIBLE ALONG AND JUST AHEAD OF THIS SYSTEM IN THE OHIO AND TENNESSEE RIVER VALLEYS ON TUESDAY, AND THE EAST COAST ON WEDNESDAY. FARTHER SOUTH ACROSS THE GULF STATES, THUNDERSTORMS WITH EMBEDDED MODERATE RAIN ARE POSSIBLE ON WEDNESDAY, GIVEN THE UNSTABLE AIR AND INFLOW OF MOISTURE FROM THE GULF OF MEXICO. BEHIND THE FRONT, HIGH PRESSURE WILL CONTINUE TO BUILD, LEADING TO MORE STABLE CONDITIONS AND TEMPERATURES RETURNING TO NEAR NORMAL FOR THIS TIME OF THE YEAR. HIGH PRESSURE ACROSS THE CENTRAL U.S. AND DESERT SOUTHWEST SHOULD KEEP THE WEATHER RELATIVE QUIET ACROSS THESE REGIONS.


Weather Forecast December 4, 2012 thru December 6, 2012

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