613
FXUS01 KWBC 142045
PMDSPD
SHORT RANGE FORECAST DISCUSSION
NWS HYDROMETEOROLOGICAL PREDICTION CENTER CAMP SPRINGS MD
439 PM EDT WED OCT 14 2009
VALID 00Z THU OCT 15 2009 - 12Z FRI OCT 16 2009
RAIN SHOWERS ALONG THE COAST AND SNOW SHOWERS IN THE MOUNTAINS
WILL BE ON THE DECREASE TONIGHT ACROSS THE WEST...WITH HIGH
PRESSURE BUILDING IN FROM THE EASTERN PACIFIC FOR THURSDAY. A
STRONG WARM FRONT ASSOCIATED WITH ANOTHER PACIFIC SYSTEM WILL MOVE
ACROSS THE PACIFIC NORTHWEST BETWEEN LATE THURSDAY NIGHT AND
FRIDAY MORNING...WITH PATCHY DRIZZLE AND LIGHT RAINFALL DEVELOPING
ALONG THE COAST FROM THE OREGON/CALIFORNIA BORDER NORTHWARD TO
PUGET SOUND. MODERATE RAINFALL SHOULD DEVELOP ALONG THE WASHINGTON
COAST AND NORTHWEST OREGON COAST BY FRIDAY NIGHT. MOST OF
CALIFORNIA AND THE DESERT SOUTHWEST WILL RECEIVE A WARM AND DRYING
TREND HEADING INTO THE WEEKEND.
AN ALBERTA CLIPPER WILL MOVE ACROSS THE NORTHERN PLAINS AND
MIDWEST TONIGHT...BRINGING THE THREAT OF ACCUMULATING SNOW AND A
MIX OF RAIN AND SNOW TO PORTIONS OF NORTH DAKOTA...MINNESOTA...AND
WISCONSIN. THE CLIPPER SYSTEM WILL MOVE EAST INTO THE MIDWEST AND
WEAKEN ON THURSDAY...WITH LIGHT PRECIPITATION DEVELOPING ACROSS
IOWA...ILLINOIS AND INDIANA THROUGH THURSDAY NIGHT. THE CLIPPER
MAY PRODUCE A LIGHT RAIN AND SNOW SHOWER MIX EARLY FRIDAY MORNING
ACROSS THE GREAT LAKES AND MIDWEST.
A COOLING TREND AND WET CONDITIONS ARE EXPECTED ACROSS THE SOUTH
TONIGHT AND THURSDAY AS A COLD FRONT MOVES THROUGH THE SOUTH. WEAK
LOW PRESSURE ALONG THE FRONT WILL DEVELOP THURSDAY MORNING ACROSS
EAST TEXAS AND MOVE SLOWLY EASTWARD ACROSS THE SOUTH THROUGH EARLY
FRIDAY MORNING...BRINGING THE THREAT OF RAIN AND SCATTERED
THUNDERSTORMS TO THE GULF COAST...INCLUDING NORTHERN AND CENTRAL
SECTIONS OF FLORIDA. THE LOW PRESSURE SYSTEM WILL MOVE OFF THE
GEORGIA...SOUTH CAROLINA COAST FRIDAY MORNING WITH THE COLD FRONT
SWEEPING SOUTHWARD INTO THE CENTRAL GULF OF MEXICO.
RAPIDLY-DEVELOPING LOW PRESSURE OFF THE CAROLINA COAST WILL BRING
PERIODS OF CLOUDY...COOL AND RAINY WEATHER TO THE EASTERN SEABOARD
INCLUDING SOUTHERN NEW ENGLAND THROUGH FRIDAY MORNING. COLD AIR
OVER EASTERN CANADA WILL BE DRAWN INTO THE STRENGTHENING
SYSTEM...WITH RAIN CHANGING OVER TO SNOW ACROSS THE MOUNTAINS AS
THE STORM SYSTEM PASSES TO THE EAST OF THE DELMARVA AND JERSEY
SHORES BY FRIDAY MORNING. ACCUMULATING SNOWFALL...HEAVY AT
TIMES...IS ANTICIPATED ACROSS CENTRAL AND NORTHERN
PENNSYLVANIA...AND THE HIGHER ELEVATIONS OF WESTERN MARYLAND AND
WEST VIRGINIA LATE THURSDAY NIGHT INTO FRIDAY MORNING. A RAIN AND
SNOW MIX WILL TRANSITION OVER TO LIGHT AND MODERATE RAINFALL AT
LOWER ELEVATIONS...INCLUDING PORTIONS OF EASTERN
PENNSYLVANIA...NORTHWEST NEW JERSEY AND SOUTHEASTERN NEW YORK.
ISOLATED HEAVY RAINFALL MAY EXTEND INLAND FROM THE COAST BETWEEN
NORTHEASTERN NORTH CAROLINA AND LONG ISLAND AS THE SYSTEM MOVES
NORTHWARD THROUGH TIME. RAINFALL IS EXPECTED TO REACH SOUTHERN NEW
ENGLAND BY THURSDAY EVENING BASED ON THE CURRENT TRACK OF THIS
COASTAL STORM.
VOJTESAK
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