STORM SUMMARY NUMBER 01 FOR MID-ATLANTIC HEAVY RAIN EVENT
NWS WEATHER PREDICTION CENTER COLLEGE PARK MD
1100 PM EDT FRI JUL 28 2017

...HEAVY RAINFALL WILL CONTINUE ACROSS MUCH OF THE MID-ATLANTIC
STATES TONIGHT...

FLOOD AND FLASH FLOOD WARNINGS...WATCHES...AND ADVISORIES ARE IN
EFFECT ACROSS PARTS OF THE MID-ATLANTIC FROM NORTHERN VIRGINIA TO
CENTRAL PENNSYLVANIA AND BACK INTO THE CENTRAL APPALACHIANS.

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

AT 1000 PM EDT...A DEEP AND ANOMALOUS UPPER LEVEL LOW WAS LOCATED
OVER EASTERN PORTIONS OF THE OHIO VALLEY. AT THE SURFACE...A
SURFACE LOW WITH A CENTRAL PRESSURE OF 1005 MB...OR 29.68
INCHES...WAS LOCATED OVER NORTHERN VIRGINIA. A WAVY
QUASI-STATIONARY BOUNDARY WAS ALSO DRAPED FROM THE NORTHEAST
COAST...THROUGH THE MID-ATLANTIC REGION AND BACK INTO THE TENNESEE
VALLEY. NATIONAL WEATHER SERVICE RADARS AND SURFACE OBSERVATIONS
INDICATED MODERATE TO VERY HEAVY RAINFALL ACROSS MUCH OF THE
MID-ATLANTIC STATES WITH SOME EMBEDDED THUNDERSTORMS...ESPECIALLY
SOUTH AND EAST OF THE SURFACE LOW.

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

...WASHINGTON DC...
MANOR PARK                            4.45                    
WASHINGTON/NATIONAL ARPT              2.09                    

...DELAWARE...
LAUREL                                3.49                    

...MARYLAND...
WHEATON HILLS                         6.74                    
OLNEY                                 4.25                    
GAITHERSBURG                          4.12                    
SALISBURY-OCEAN CITY WICOMICO ARPT    3.78                    
PATTERSON PARK                        3.22                    
COLUMBIA 1 SSE                        2.84                    
ANDREWS AFB/CAMP SPRINGS              2.70                    
COLLEGE PARK 1 ESE                    2.48                    
HERALD HARBOR 1 NW                    2.30                    
PLUM POINT 1 NW                       2.29                    
WINCHESTER ON THE SEVERN              2.19                    
BALTIMORE SCIENCE CENTER              1.51                    

...NORTH CAROLINA...
ELIZABETH CITY RGNL ARPT              3.57                    
GRANDY                                3.25                    

...VIRGINIA...
SEMINARY HILLS                        4.75                    
UPPER MARLBORO                        4.57                    
FALLS CHURCH                          4.54                    
DEL RAY E BELLEFONTE                  4.24                    
CHARLOTTESVILLE ARPT                  1.57                    


EXPECT HEAVY RAINFALL TO CONTINUE OVERNIGHT TONIGHT AS THE SURFACE
LOW DRIFTS SLOWLY EASTWARD AND OFF THE MID-ATLANTIC COAST BY
SATURDAY MORNING. AN ADDITIONAL 2 TO 4 INCHES...WITH LOCALLY
HIGHER AMOUNTS...IS POSSIBLE FROM SOUTHWEST PENNSYLVANIA TO THE
DELMARVA. GIVEN ALREADY VERY SATURATED GROUND...FLOODING AND FLASH
FLOODING WILL BE A THREAT THROUGH SATURDAY MORNING.

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

SANTORELLI