690
FXUS01 KWBC 060735
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
234 AM EST FRI NOV 06 2009
VALID 12Z FRI NOV 06 2009 - 00Z SUN NOV 08 2009
A LARGE STORM SYSTEM ASSOCIATED WITH A STRONG CLOSED LOW OVER THE
GULF OF ALASKA HAS MOVED ONSHORE INTO THE PACIFIC
NORTHWEST...BRINGING MODERATE RAIN TO THE COASTAL STATES.
RAIN...ALONG WITH SOME SNOW IN THE HIGHER TERRAIN...WILL SPREAD
EASTWARD INTO THE INTERMOUNTAIN WEST BY MID MORNING FRIDAY.
PRECIPITATION IS EXPECTED TO PERSIST OVER THE AREA THROUGH THE
WEEKEND...SUSTAINED BY MULTIPLE DISTURBANCES THAT WILL SWING
AROUND THE CLOSED LOW BEHIND THE FRONT. THESE POCKETS OF
UPPER-LEVEL ENERGY WILL DRAW ADDITIONAL MOISTURE FROM THE PACIFIC
BEFORE MOVING INLAND INTO THE ALREADY SOGGY NORTHWESTERN U.S.
HIGH PRESSURE REIGNS ACROSS THE SOUTHER TIER OF THE COUNTRY
PROVIDING SUNNY CONDITIONS FOR THE END OF THE WORK WEEK AND
CONTINUING INTO THE WEEKEND. THIS LACK OF CLOUD COVER IN THE SOUTH
EAST WILL RESULT IN CHILLIER THAN USUAL OVERNIGHT TEMPERATURES.
OVERNIGHT TEMPERATURES IN THE SOUTHWEST WILL FARE BETTER BECAUSE
CLOUD COVER WILL BE GREATER IN THIS REGION... HOLDING IN MORE OF
THE HEAT GAINED DURING DAYLIGHT HOURS.
PRECIPITATION ASSOCIATED WITH THE DEEPENING LOW OFF THE
NORTHEASTERN U.S. COAST IS DIMINISHING AS THE LOW CENTER MOVES
FURTHER EAST OFFSHORE. SOME MODERATE RAIN MAY CONTINUE TO FALL
ALONG THE NEW ENGLAND COAST THROUGH MID MORNING FRIDAY. HOWEVER
THE MAJORITY OF THE PRECIPITATION STILL ASSOCIATED WITH THIS
SYSTEM INLAND WILL BE LIGHT SNOW...WHICH WILL TAPER OFF AS
SATURDAY APPROACHES.
COLLINS
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