Hydrometeorological Discussion
Issued by NWS Middle Atlantic RFC

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AGUS71 KRHA 201355
HMDRHA

HYDROMETEOROLOGICAL DISCUSSION
MIDDLE ATLANTIC RIVER FORECAST CENTER
NATIONAL WEATHER SERVICE STATE COLLEGE PA
 955 AM EDT SAT SEP 20 2014

HIGH PRESSURE CENTERED OVER THE NEW ENGLAND STATES FRIDAY PROVIDED
MAINLY DRY WEATHER TO THE MID-ATLANTIC REGION. SCATTERED SHOWERS ACROSS
SOUTHERN VIRGINIA AMOUNTED TO ONE QUARTER INCH OR LESS OF RAINFALL.

  Value  County                St  Location
   0.27  Roanoke               VA  Roanoke 8N
   0.22  Botetourt             VA  Troutville 4.3WNW CO
   0.20  Botetourt             VA  Carvin Creek IFLOWS
   0.13  Roanoke               VA  Roanoke AP
   0.11  Bedford               VA  Big Island
   0.10  Appomattox            VA  Pamplin MADIS
   0.10  Campbell              VA  Lynchburg AP
   0.09  Montgomery            VA  Blacksburg 2.4ENE CO
   0.08  Botetourt             VA  Apple Orchard Mt IFL
   0.08  Botetourt             VA  Cloverdale IFLOWS
   0.08  Roanoke               VA  Mason Cove IFLOWS
   0.08  Botetourt             VA  North Fork IFLOWS
   0.05  Campbell              VA  Lynchburg 6.7ESE COC
   0.05  independent city      VA  Lynchburg 2.5WSW COC
   0.04  Craig                 VA  Abbott IFLOWS

HIGH PRESSURE WILL MOVE OFF THE NEW ENGLAND COAST TODAY AS LOW PRESSURE
OFF THE CAROLINA COAST MOVES NORTHEAST. THE NET RESULT WILL BE MORE DRY
WEATHER FOR MOST OF THE REGION. SCATTERED SHOWERS WILL ONLY AFFECT
COASTAL AREAS.

BY SUNDAY, LOW PRESSURE WILL WILL MOVE FURTHER OFFSHORE AS A COLD FRONT
ARRIVES FROM THE NORTHWEST. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS
ARE EXPECTED INTO SUNDAY NIGHT WITH THE MOST ORGANIZED ACTIVITY
AFFECTING THE SUSQUEHANNA AND DELAWARE BASINS. THE HIGHEST EXPECTED
RAINFALL AMOUNTS WILL BE ONE HALF TO THREE QUARTERS OF AN INCH ACROSS
THE NORTH.

DRIER WEATHER WILL RETURN MONDAY BUT INSTABILITY SHOWERS ARE EXPECTED
ACROSS THE UPPER SUSQUEHANNA BASIN WITH COLD AIR ALOFT AND CHILLY AIR
FLOWING ACROSS LAKES ERIE AND ONTARIO. ANY PRECIPITATION AMOUNTS WILL BE
LIGHT.

ON AREA RIVERS AND CREEKS, MINOR CHANGES WILL CONTINUE INTO TUESDAY FROM
THE POTOMAC BASIN SOUTHWARD. MINOR RISES ARE EXPECTED LATER SUNDAY INTO
MONDAY ACROSS PORTIONS OF THE SUSQUEHANNA AND DELAWARE BASINS.

ALL DAILY RIVER FORECASTS HAVE BEEN ISSUED.

TJR
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