Hydrometeorological Discussion
Issued by NWS Middle Atlantic RFC

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AGUS71 KRHA 051302
HMDRHA

HYDROMETEOROLOGICAL DISCUSSION
MIDDLE ATLANTIC RIVER FORECAST CENTER
NATIONAL WEATHER SERVICE STATE COLLEGE PA
 902 AM EDT SUN JUL 05 2015

Areas of rain and scattered thunderstorms moved across the Mid
Atlantic region over the past 24 hours.  The steadiest rainfall
was over parts of Pennsylvania, Northern New Jersey into Eastern
New York.  Below is a list of a few highest observed rainfall
reports over the past 24 hours ending 8am Sunday.

 AMT    LOCATION                       COUNTY           ST
 1.49   Bremo Bluff                    Fluvanna         VA
 1.18   Richmond AP                    Henrico          VA
 1.16   Gordonsville 10.4S COCO        Louisa           VA
 1.15   Raystown Dam DCP               Huntingdon       PA
 1.11   Benton                         Columbia         PA
 0.99   New Albany MADIS               Bradford         PA
 0.98   Oxon Hill                      Prince Georges   MD
 0.98   Oxon Hill 1.1W COCO            Prince Georges   MD
 0.93   Lewistown                      Mifflin          PA
 0.91   Bodines IFLOWS                 Lycoming         PA
 0.90   Stevenson Dam                  Cameron          PA
 0.90   Slate Run F/P Precip           Lycoming         PA
 0.90   Mifflinburg 1.4NW COOP         Union            PA
 0.86   Dulles AP                      Fairfax          VA
 0.86   Blackwater NWR                 Dorchester       MD

A weak ridge of high pressure will build over the northern
New England.  Meanwhile an upper level low over eastern
Tennessee will move northeastward into southwestern PA
late Monday.  Moisture will be drawn northward ahead of
the upper low and bring periods of showers and thunderstorms.
The combination of good moisture plume transport, deep SSE
flow and UVV`s will bring rainy periods from south to north
across MARFC`s hydrologic service area tonight into Monday.
With high PW`s, areas of locally heavy rainfall will be
possible.

The heaviest rainfall over the next 48 hours is expected to
extend from the West Branch Susquehanna and Juniata river
basin southward into the Potomac, Shenandoah, Rappahannock
and James river basin.

72 hour basin average rainfall forecast through 12Z Wednesday
is expected to range from two tenths /0.20/ to one and one
half /1.50/ inches.  Locally 2 to 3 inches of rain will be
possible in persistent rain bands.

MARFC Hydrologists are running the river model at this time
and RVF`s will be issued shortly.  If any WFO`s have any
questions or concerns, just call MARFC.

DAS

and
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