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Hydrometeorological Discussion
Issued by NWS Middle Atlantic RFC

000
AGUS71 KRHA 231347
HMDRHA

HYDROMETEOROLOGICAL DISCUSSION
MIDDLE ATLANTIC RIVER FORECAST CENTER
NATIONAL WEATHER SERVICE STATE COLLEGE PA
 947 AM EDT THU MAY 23 2013


SHOWERS AND THUNDERSTORMS WERE NUMEROUS ACROSS MOST OF OUR BASINS
DURING THE PAST 24 HOURS. THE HIGHEST AMOUNTS FROM 12Z WEDNESDAY TO
12Z THURSDAY:

  Value  County                St  Location
   1.90  Nelson                VA  Montebello Fish Nurs
   1.34  Alleghany             VA  Covington
   1.27  Craig                 VA  Abbott IFLOWS
   1.15  Loudoun               VA  Round Hill 2.7WSW CO
   1.14  Hardy                 WV  Wardensville 2.6S
   1.08  Monroe                PA  Mount Pocono
   1.06  Delaware              NY  Cannonsville Reservo
   1.03  Highland              VA  Mill Gap 1SW COOP
   1.03  Otsego                NY  Unadilla COOP
   0.99  Botetourt             VA  Apple Orchard Mt IFL
   0.98  Loudoun               VA  Lovettsville GOES
   0.98  Carroll               MD  Taneytown 3.2NE COCO
   0.97  Rockbridge            VA  Natural Bridge RAWS
   0.97  Sullivan              PA  Laporte
   0.92  Sullivan              NY  Neversink Reservoir

AN AMPLIFYING UPPER-LEVEL TROUGH AND ITS ASSOCIATED COLD FRONTS WILL
CROSS THE REGION OVER THE NEXT 48 HOURS. CANADIAN HIGH PRESSURE WILL
BUILD SOUTHEAST FROM THE GREAT LAKES THROUGH THE MEMORIAL DAY
WEEKEND. THE OVERALL PATTERN WILL BE UNSETTLED THROUGH FRIDAY WITH
SLOWLY IMPROVING CONDITIONS EXPECTED DURING THE WEEKEND.

DAY ONE QPF RANGES FROM A THIRD IN FAR WESTERN BASINS WITH 1 TO 1 1/3
INCHES ACROSS EASTERN PA/NY BASINS AND AN INCH OR LESS IN NJ. DAY TWO
IS A TENTH OR LESS IN WESTERN BASINS TO A QUARTER/HALF AN INCH IN
NJ. DAY THREE IS ZERO IN WESTERN BASINS TO A QUARTER INCH IN EASTERN
NY AND NORTHERN NEW JERSEY.

1 TO 4 FOOT RISES ARE FORECAST FOR THE DELAWARE BASINS WITH POSSIBLE
SHARP RISES ALONG SMALL STREAMS OR CREEKS IN LOCALLY HEAVY
DOWNPOURS. RISES OF A FEW FEET OR LESS ARE EXPECTED IN THE SUSQUEHANNA
BASIN DURING THE NEXT COUPLE OF DAYS.

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