HYDROMETEOROLOGICAL DISCUSSION
MIDDLE ATLANTIC RIVER FORECAST CENTER
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1010 AM EDT TUE OCT 27 2009

LOW PRESSURE MOVING UP THE MID ATLANTIC COAST WILL BRING A PERIOD OF
RAIN TO PARTS OF SOUTHEAST NEW YORK, SOUTHEAST PENNSYLVANIA SOUTHWARD
INTO DELAWARE THROUOGH 18Z TODAY. BASIN AVERAGE RAINFALL SHOULD BE
ONE HALF /0.50/ INCH OR LESS.

ANOTHER STORM SYSTEM WILL MOVE NORTHEASTWARD FROM THE TENNESSEE RIVER
VALLEY AND BRING PERIODS OF RAIN TO THE MID ATLANTIC REGION. RAIN
WILL OVERSPREAD THE REGION FROM SW TO NE FROM LATER THIS AFTERNOON
INTO TONIGHT AND WEDNESDAY.

TOTAL QPF FROM 12Z TUESDAY THROUGH 12Z THURSDAY IS FORECAST TO RANGE
FROM ONE HALF /0.50/ TO ONE AND ONE HALF /1.50/ INCHES ACROSS MARFC'S
HYDROLOGIC SERVICE AREA. 1 TO 3 FOOT RISES CAN BE EXPECTED ON THE
PASSAIC AND RARITAN RIVERS IN NEW JERSEY, 2 TO 4 FOOT RISES ACROSS THE
SOUTHEAST PA STREAMS, WITH GENERAL 1 TO 2 FOOT RISES EXPECTED
ELSEWHERE ACROSS THE LARGER RIVERS AND TRIBUTARIES ACROSS THE MID
ATLANTIC REGION.

MARFC'S RVF'S ARE ON THE STREET. UPDATED HEADWATER AND FLASH FLOOD
GUIDANCE WILL BE ISSUED BY 11AM.
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