329  
FGUS71 KPHI 041826  
ESFPHI  
DEC001-003-005-MDC011-015-029-035-041-NJC001-005-007-009-011-015-  
019-021-023-025-027-029-033-035-037-041-PAC011-017-025-029-045-  
077-089-091-095-101-061830-  
 
WINTER/SPRING FLOOD POTENTIAL OUTLOOK  
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ  
226 PM EDT THU APR 4 2019  
 
WINTER/SPRING FLOOD POTENTIAL OUTLOOK...NUMBER 7  
 
THIS IS THE SEVENTH, AND LAST, IN A SERIES OF ANNUAL FLOOD  
POTENTIAL STATEMENTS INTENDED TO PROVIDE INSIGHT INTO THE  
LIKELIHOOD OF RIVER FLOODING (NOT FLASH FLOODING) ACROSS THE  
MIDDLE/LOWER DELAWARE, LEHIGH, SCHUYLKILL, PASSAIC AND RARITAN  
RIVER BASINS. THESE STATEMENTS WILL PROVIDE INFORMATION ON FLOOD  
THREAT CONDITIONS SUCH AS RECENT PRECIPITATION, SOIL MOISTURE,  
SNOW COVER AND ITS WATER EQUIVALENT, RIVER ICE CONDITIONS,  
STREAMFLOW, FUTURE PRECIPITATION AND OTHERS.  
 
THIS OUTLOOK DOES NOT ADDRESS THE SEVERITY OR EXTENT OF ANY  
FUTURE RIVER FLOODING.  
 
IN THE MID-ATLANTIC REGION, HEAVY RAINFALL IS THE PRIMARY FACTOR  
WHICH LEADS TO RIVER FLOODING. IT IS IMPORTANT TO NOTE THAT HEAVY  
RAINFALL CAN RAPIDLY CAUSE RIVER FLOODING ANY TIME OF YEAR, EVEN  
WHEN THE OVERALL RIVER FLOOD POTENTIAL IS CONSIDERED TO BE LOW.  
 
THIS OUTLOOK IS VALID BETWEEN APRIL 4-18, 2019.  
 
IN THE MOUNT HOLLY, NEW JERSEY HYDROLOGIC SERVICE AREA (HSA), THE  
OVERALL RIVER FLOOD POTENTIAL IS NORMAL THROUGH THE TWO WEEK  
PERIOD.  
 
NOTE - FOR THE HEADWATERS OF THE DELAWARE RIVER, SEE THE  
STATEMENT  
(FGUS71 KBGM ESFBGM) FROM OUR BINGHAMTON (BGM) NEW YORK OFFICE.  
 
CURRENT FLOODING - NONE.  
 
RECENT PRECIPITATION - BELOW NORMAL TO NORMAL. BETWEEN 2.0 AND  
4.0 INCHES OF LIQUID HAVE BEEN RECORDED OVER THE LAST 30 DAYS  
ACROSS THE ENTIRE HSA. PRECIPITATION DEPARTURE MAPS CAN BE FOUND  
AT WWW.WEATHER.GOV/MARFC (UNDER THE WATER SUPPLY TAB).  
 
SNOW COVER - NORMAL. NO SNOW IS BEING OBSERVED ACROSS THE HSA.  
DEPTH AND BASIN-AVERAGE WATER EQUIVALENT ESTIMATES CAN BE FOUND  
AT WWW.WEATHER.GOV/MARFC (UNDER THE SEASONAL INTEREST TAB) OR  
WWW.NOHRSC.NOAA.GOV (UNDER THE NATIONAL ANALYSIS TAB).  
 
RIVER ICE - NORMAL. NO RIVER ICE IS BEING OBSERVED ON AREA RIVERS.  
 
STREAMFLOW - VARIABLE, BUT MAINLY NORMAL. REAL TIME WATER DATA IS  
AVAILABLE FROM THE UNITED STATES GEOLOGICAL SURVEY (USGS) BY  
VISITING HTTP://WATER.USGS.GOV.  
 
SOIL MOISTURE - VARIABLE, NORMAL TO MUCH ABOVE NORMAL. SOIL  
MOISTURE MONITORING CHARTS (LONG TERM PALMER DROUGHT SEVERITY  
INDEX) FROM NOAA'S CLIMATE PREDICTION CENTER CAN BE FOUND AT THE  
FOLLOWING WEBSITES...  
WWW.CPC.NCEP.NOAA.GOV/PRODUCTS/ANALYSIS_MONITORING/REGIONAL_  
MONITORING/PALMER.GIF AS WELL AS WWW.DROUGHT.GOV.  
 
GROUND WATER - USGS MONITORING WELLS INDICATE THAT CURRENT GROUND  
WATER LEVELS ACROSS THE REGION ARE VARIABLE, RANGING FROM BELOW  
NORMAL TO MUCH ABOVE ABOVE NORMAL. ADDITONAL INFORMATION CAN BE  
FOUND AT HTTP://GROUNDWATERWATCH.USGS.GOV.  
 
RESERVOIR CONDITIONS - WATER SUPPLY AND FLOOD CONTROL RESERVOIRS  
IN THE AREA ARE RUNNING NORMAL TO ABOVE NORMAL.  
 
FUTURE WEATHER CONDITIONS - HIGH PRESSURE WILL PROGRESS THROUGH THE  
NORTHEAST TODAY AND TONIGHT. A WEAK SYSTEM WILL MOVE THROUGH THE  
EASTERN U.S. FRIDAY AND FRIDAY NIGHT, FOLLOWED BY ANOTHER SURFACE  
HIGH BUILDING INTO THE AREA FOR THE WEEKEND. A STRONGER STORM  
SYSTEM WILL LIKELY AFFECT THE REGION EARLY NEXT WEEK. THE OVERALL  
8 TO 14 DAY OUTLOOK CALLS FOR BELOW NORMAL TEMPERATURES AND ABOVE  
NORMAL PRECIPITATION.  
 
SUMMARY - TAKING ALL OF THE INCLUDED VARIABLES INTO CONSIDERATION,  
THE OVERALL FLOOD POTENTIAL IS NORMAL FOR THE TWO WEEK PERIOD.  
 
FOR COMPLETE WEATHER INFORMATION, VISIT OUR WEBSITE AT:  
WWW.WEATHER.GOV/PHI  
 
THIS IS THE LAST FLOOD OUTLOOK OF THE SEASON.  
 

 
 
SUMMARY/OVERVIEW OF FLOOD POTENTIAL THROUGH APRIL 18, 2019:  
 
OVERALL FLOOD POTENTIAL...NORMAL  
FLOODING...NONE  
RECENT PRECIPITATION...BELOW NORMAL TO NORMAL  
SNOW COVER...NORMAL  
RIVER ICE...NORMAL  
STREAMFLOW...MAINLY NORMAL  
SOIL MOISTURE...VARIABLE, NORMAL TO MUCH ABOVE NORMAL  
GROUND WATER...VARIABLE, BELOW NORMAL TO MUCH ABOVE NORMAL  
RESERVOIR CONDITIONS...NORMAL TO ABOVE NORMAL  
 

 
 
KRUZDLO  
 
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