STORM SUMMARY NUMBER 3 FOR MID-ATLANTIC HEAVY RAIN EVENT
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
1100 AM EDT SAT JUL 29 2017

...HEAVY RAIN MOVING OFF THE MID-ATLANTIC COAST...

FLOOD WARNINGS AND FLASH FLOOD WATCHES REMAIN IN EFFECT OVER
INTERIOR MID-ATLANTIC WEST OF THE CHESAPEAKE BAY INTO PART OF THE
CENTRAL APPALACHIANS.

FOR A DETAILED GRAPHICAL DEPICTION OF THE LATEST
WATCHES...WARNINGS AND ADVISORIES...PLEASE SEE WWW.WEATHER.GOV

A COASTAL STORM NOT TYPICAL DURING MID-SUMMER IN THE MID-ATLANTIC
REGION HAD MOVED OFF THE DELMARVA PENINSULAR.  AT 1000 AM EDT...IT
WAS CENTERED ABOUT 60 MILES EAST-SOUTHEAST OF OCEAN
CITY...MARYLAND...WITH AN ESTIMATED CENTRAL PRESSURE OF 1000
MB...OR 29.53 INCHES...MOVING QUICKLY TOWARD THE EAST-NORTHEAST
AWAY FROM THE MID-ATLANTIC COAST.  A COLD FRONT EXTENDED
SOUTHWESTWARD FROM THE LOW ACROSS THE SOUTHERN MID-ATLANTIC AND
INTO THE DEEP SOUTH.  NATIONAL WEATHER SERVICE RADARS AND SURFACE
OBSERVATIONS INDICATED THAT MUCH OF THE HEAVY RAIN ASSOCIATED WITH
THE LOW PRESSURE SYSTEM HAD MOVED OFF THE MID-ATLANTIC COAST
DURING THE PAST FEW HOURS.  A BATCH OF MODERATE TO HEAVY RAIN WAS
LOCATED FURTHER INLAND OVER THE MARYLAND PANHANDLE INTO NORTHERN
WEST VIRGINIA AND SOUTHWEST PENNSYLVANIA.  THIS AREA OF RAIN WAS
ROTATING AROUND THE EAST AND NORTH FLANK OF AN UPPER-LEVEL LOW AS
IT MOVES TOWARD THE SOUTHEAST.  PATCHES OF LIGHT RAIN WERE MOVING
SOUTHWESTWARD FROM LONG ISLAND AND DOWN ACROSS THE MID-ATLANTIC
STATES.  ELSEWHERE...SCATTERED THUNDERSTORMS AHEAD OF THE COLD
FRONT WERE MOVING ACROSS COASTAL SECTIONS OF THE SOUTHEAST INTO
THE GULF COAST.

...SELECTED STORM TOTAL RAINFALL IN INCHES FROM 800 AM EDT FRI JUL
28 THROUGH 1000 AM EDT SAT JUL 29...

...WASHINGTON DC...
MANOR PARK                            4.45                    
WASHINGTON 1 E                        3.31                    

...DELAWARE...
LAUREL                                5.85                    
MILFORD 2.6 S                         5.83                    
ELLENDALE 3.4 ENE                     4.87                    
HARRINGTON                            4.78                    
SEAFORD                               4.75                    
SEAFORD 0.7 SW                        4.75                    
ELLENDALE                             4.64                    
DELMAR 4.3 E                          4.57                    
BLACKBIRD                             2.97                    
LEWES                                 2.74                    

...MARYLAND...
OLNEY                                 6.86                    
WHEATON HILLS                         6.74                    
SILVER SPRING 5.7 NW                  6.38                    
ELKRIDGE 1.8 W                        6.10                    
MONTGOMERY VILLAGE 1.3 SSW            6.00                    
EASTON                                5.67                    
ELKRIDGE                              5.54                    
GAITHERSBURG 3.1 NE                   5.53                    
SOMERSET                              4.25                    
BALTIMORE                             4.13                    
SILVER SPRING 1 SSW                   3.79                    
SALISBURY-OCEAN CITY WICOMICO ARPT    3.78                    
PLUM POINT 1 NW                       3.54                    
PATTERSON PARK                        3.22                    
BLOOMFIELD 1 SSE                      3.12                    
COLLEGE PARK 1 SW                     3.11                    
WALDORF                               2.87                    
COLUMBIA 1 SSE                        2.84                    
ANDREWS AFB/CAMP SPRINGS              2.70                    
HERALD HARBOR 1 NW                    2.30                    
WESTMINSTER 2 SE                      1.87                    

...NORTH CAROLINA...
GRANDY 0.6 E                          5.28                    
SOUTH MILLS 0.1 SW                    4.36                    
HERTFORD 11.4 E                       4.06                    
COROLLA 11.7 NNW                      3.95                    
ELIZABETH CITY RGNL ARPT              3.57                    
WAKE FOREST 2.4 N                     3.56                    
GRANDY                                3.25                    

...NEW JERSEY...
ATLANTIC CITY INTL AIRPORT            5.81                    
WILDWOOD CREST                        5.03                    
CAPE MAY AIRPORT                      4.48                    

...PENNSYLVANIA...
CHARLEROI 2.6 W                       4.95                    
VENETIA 0.7 WNW                       3.50                    
ORRTANNA 3.2 NNW                      3.29                    
LEECHBURG 1.4 SW                      3.28                    
PITTSBURGH                            3.17                    

...VIRGINIA...
LOTTSBURG 2.3 NNE                     7.51                    
FALLS CHURCH 3.0 SW                   7.18                    
ALEXANDRIA 6.6 WNW                    5.97                    
HARRISONBURG 4.2 SSE                  5.45                    
PLEASANT VALLEY 3 E                   5.25                    
SEMINARY HILLS                        4.75                    
UPPER MARLBORO                        4.57                    
FALLS CHURCH                          4.54                    
BERRYVILLE 0.9 NNW                    4.44                    
DEL RAY E BELLEFONTE                  4.24                    
BAILEYS CROSSROADS 1 N                3.70                    
LEESBURG                              3.60                    
PRINCE WILLIAM                        3.29                    
WINCHESTER 2 S                        2.40                    
PHILOMONT 1 SE                        2.11                    
STEPHENS CITY 2 ESE                   1.97                    
FRONT ROYAL 3 ESE                     1.68                    
CHARLOTTESVILLE ARPT                  1.57                    

...WEST VIRGINIA...
HARPERS FERRY 7.2 SSW                 4.20                    
WALLACE 2.2 S                         3.69                    
WASHINGTON COUNTY ARPT                3.56                    
KINGWOOD 0.6 E                        3.17                    
BUNKER HILL                           3.10                    
INWOOD                                3.10                    
BAYARD                                3.08                    
KLINE GAP 2 ESE                       2.10                    


AS MUCH AS 7 INCHES OF RAIN HAD ALREADY FALLEN ACROSS THE
MID-ATLANTIC REGION.  A PERIOD OF MODERATE RAIN COULD ROTATE
ACROSS THE MID-ATLANTIC REGION TODAY AS THE UPPER-LEVEL LOW DROPS
SOUTHEASTWARD.  GENERALLY LESS THAN AN INCH OF ADDITIONAL
RAIN...WITH LOCALLY HIGHER AMOUNTS ARE POSSIBLE ACROSS THE
MID-ATLANTIC BEFORE THE RAIN FINALLY TAPERS OFF AND MOVES OFF THE
MID-ATLANTIC COAST LATER TONIGHT.  GIVEN ALREADY VERY SATURATED
GROUND...ANY ADDITIONAL RAINFALL WILL PROLONG THE THREAT OF
FLOODING AND FLASH FLOODING IN THE MID-ATLANTIC.

THE NEXT STORM SUMMARY WILL BE ISSUED BY THE WEATHER PREDICTION
CENTER AT 500 PM EDT. PLEASE REFER TO YOUR LOCAL NATIONAL WEATHER
SERVICE OFFICE FOR ADDITIONAL INFORMATION ON THIS EVENT.

KONG