284  
FXUS61 KPHI 130527  
AFDPHI  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ  
127 AM EDT SUN JUL 13 2025  
   
SYNOPSIS  
 
A COLD FRONT APPROACHES THE REGION TODAY INTO MONDAY BEFORE  
SLOWLY CROSSING THROUGH LATER MONDAY INTO TUESDAY. THEREAFTER,  
THE FRONT STALLS NEAR/OVER THE REGION BEFORE LIFTING BACK NORTH  
AS A WARM FRONT LATER WEDNESDAY INTO THURSDAY. ANOTHER COLD  
FRONT APPROACHES TOWARDS THE END OF WEEK.  
 
 
   
NEAR TERM /THROUGH TONIGHT/  
 
TODAY LOOKS MOSTLY LIKE A REPEAT OF YESTERDAY AS EASTERLY FLOW  
CONTINUES TO DOMINATE. THIS MEANS MORE LOW CLOUDS AND PATCHY FOG  
TO START, WITH SUN BREAKING THROUGH TOWARDS MIDDAY/EARLY  
AFTERNOON. ALSO IT MEANS THAT CONVECTION WILL BE MOSTLY  
CONFINED TO WELL INLAND/HIGHER TERRAIN LOCALES, WITH I-95 AND  
POINTS SOUTHEAST SEEING JUST SLIGHT CHANCE OF A SHOWER OR STORM.  
HIGHS WELL INTO THE 80S WITH HEAT INDICES IN THE 90S.  
 
TONIGHT, THINGS START TO CHANGE AS A FRONT APPROACHES. BETTER  
CHANCE THAT SOME WEAKENING CONVECTION FROM THE WEST REACHES OUR  
WESTERN LOWER ELEVATION ZONES THAN THE LAST FEW DAYS DURING THE  
EVENING, THEN REMNANT SHOWERS MAY CROSS THE ENTIRE AREA  
OVERNIGHT. OTHERWISE, LOOKS LIKE ANOTHER ROUND OF LOW  
CLOUDS/PATCHY FOG BY LATE AT NIGHT. LOWS MOSTLY NEAR OR ABOVE  
70.  
 
 
   
SHORT TERM /MONDAY THROUGH TUESDAY/  
 
A COLD FRONT APPROACHES OUR REGION FROM THE WEST MONDAY WHILE  
SLOWING DOWN AND UNDERGOING FRONTOLYSIS. VERY SLOWLY, THIS FRONT  
MAKES ITS WAY THROUGH THE REGION MONDAY INTO TUESDAY BEFORE  
EVENTUALLY STALLING OVER/NEAR THE REGION FOR THE REMAINDER OF  
THE TERM.  
 
GIVEN THIS SITUATION, EXPECT THE SHOWERY SUMMERTIME PATTERN TO  
CONTINUE. SOME SPOTTY SHOWERS LEFTOVER FROM TONIGHT COULD  
LINGER FOR AREAS DURING THE MONDAY MORNING TIME FRAME, DEPENDING  
ON THE TIME FRAME OF FRONTAL MOVEMENT. ANOTHER ROUND OF SHOWERS  
AND THUNDERSTORMS EXPECTED FOR THE REGION MONDAY AFTERNOON INTO  
THE NIGHTTIME PERIOD AS THE FRONT ONLY SAGS EVER SO SIGHTLY TO  
THE SOUTHEAST WITH TIME. WHILE THERE IS MAINLY ONLY A SLIGHT  
CHANCE OF POPS FOR TUESDAY, SOME SPOTTY SHOWERS AND  
THUNDERSTORMS SHOULD NOT BE RULED OUT FOR THE AFTERNOON TIME  
FRAME ONWARDS GIVEN THE LOCATION/PROXIMITY OF THE STALLED FRONT.  
 
FOG FORMATION IS POSSIBLE FOR AREAS DURING THE LATE NIGHTTIME  
AND EARLY MORNING PERIODS, BUT THIS WILL BE DEPENDENT ON  
PRECIPITATION OCCURRENCE AND MIXING.  
 
 
   
LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/  
 
STATIONARY BOUNDARY LOOKS TO PLAGUE THE REGION BEFORE AN  
APPROACHING LOW PRESSURE SYSTEMS LIFTS IT THROUGH AS A WEAK WARM  
FRONT WEDNESDAY/THURSDAY. THEREAFTER, ANOTHER COLD FRONT  
APPROACHES, LOOKING TO PASS THROUGH SOMETIME NEAR/DURING THE  
WEEKEND (E.G, LATE FRIDAY/EARLY SATURDAY).  
 
UNFORTUNATELY, THIS SYNOPTIC SITUATION SUPPORTS A CONTINUATION  
OF THE SHOWERY SUMMERTIME PATTERN. CHANCES FOR SHOWERS AND  
THUNDERSTORMS WEDNESDAY/THURSDAY/FRIDAY, MAINLY DURING THE  
AFTERNOON AND EVENING TIME FRAMES WITH DIURNAL HEATING IN PLACE.  
END OF THE WEEK/WEEKEND COLD FRONT WILL BE WATCHED FOR EXACT  
TIME FRAME OF APPROACH/PASSAGE, AND ITS SEVERE WEATHER  
POTENTIAL.  
 
HEAT HEADLINES MAY BE NEEDED FOR AREAS  
WEDNESDAY/THURSDAY/FRIDAY. GUIDANCE SUPPORTS HEAT INDICES  
APPROACHING CRITERIA.  
 
 
   
AVIATION /05Z SUNDAY THROUGH THURSDAY/  
 
THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG,  
KILG, KMIV, KACY AND SURROUNDING AREAS.  
 
THRU 12Z...LOW CLOUDS DEVELOPING GENERALLY WITH MOST AREAS  
SEEING CIGS DROP TO IFR OR LOWER. THE SET UP LOOKS MORE  
FAVORABLE FOR LOW CLOUDS THAN FOG, EXCEPT NEAR THE COAST,  
INCLUDING KACY, WHERE BOTH THE LOWEST CEILINGS AND LOWEST  
VISIBILITIES ARE LIKELY TO OCCUR. BY 09Z, EXPECT MOST LOCATIONS  
TO HAVE IFR CONDITIONS. WINDS REMAIN LIGHT (5 KT OR LESS),  
GENERALLY FAVORING THE SOUTHEASTERLY DIRECTION, BUT COULD BE  
VARIABLE AT TIMES. HIGH CONFIDENCE IN OVERALL PATTERN, LOW  
CONFIDENCE IN TIMING/PLACEMENT OF DEVELOPMENT OF FOG AND  
VISIBILITY RESTRICTIONS.  
 
TODAY...ONCE LOW CLOUDS AND FOG DISSIPATE, WILL SEE A RETURN TO  
VFR CONDITIONS. STORMS WILL BEGIN TO APPROACH THE AREA FROM THE  
NORTHWEST BY 00Z, BUT IMPACTS MOSTLY CONFINED TO KRDG/KABE.  
MODERATE CONFIDENCE,  
 
TONIGHT...VFR WITH A FEW T-STORMS NEAR KRDG/KABE TO START, THEN  
CIGS DROP TO IFR AGAIN MOST TERMINALS. A FEW SHOWERS COULD MAKE  
THEIR WAY ACROSS THE REST OF THE TERMINALS AFTER 6Z. LOW  
CONFIDENCE.  
 
OUTLOOK...  
 
MONDAY THROUGH THURSDAY...OVERALL, VFR CONDITIONS. HOWEVER,  
AFTERNOON AND EVENING SHRA/TSRA MAY RESULT IN BRIEF PERIODS OF  
SUB-VFR CONDITIONS DAILY. SUB-VFR CONDITIONS ARE ALSO POSSIBLE  
OVERNIGHTS/EARLY MORNINGS DUE TO LOW CLOUDS AND FOG, BUT  
UNCERTAINTY REMAINS ON THIS POTENTIAL, SO CONFIDENCE IS LOW.  
 
 
   
MARINE  
 
WINDS AND SEAS SHOULD STAY BELOW SMALL CRAFT ADVISORY CRITERIA  
THROUGH TONIGHT.  
 
OUTLOOK...  
 
SUNDAY NIGHT THROUGH THURSDAY...NO MARINE HEADLINES EXPECTED.  
WINDS GENERALLY REMAIN 15 KT OR LESS WITH SEAS AROUND 2-4 FEET.  
SHOWERS AND THUNDERSTORMS ARE POSSIBLE DAILY, PRIMARILY IN THE  
AFTERNOON AND EVENING HOURS, WITH THE GREATEST PROBABILITY OF  
SHOWERS AND STORMS BEING ON MONDAY.  
 
RIP CURRENTS...  
 
TODAY, WINDS WILL BE OUT OF THE SOUTHEAST AT AROUND 10 MPH WITH  
BREAKING WAVES AROUND 1 TO 2 FEET. THIS COMBINED WITH A LOWER  
SOUTHEAST SWELL AND LOWER WAVE HEIGHTS RESULTS IN A LOW RISK FOR  
THE DEVELOPMENT OF DANGEROUS AND LIFE THREATENING RIP CURRENTS  
AT THE JERSEY SHORE AND AT DELAWARE BEACHES.  
 
RIP CURRENTS OCCUR OFTEN IN THE VICINITIES OF JETTIES AND PIERS  
AND THE SPEED OF THE CURRENTS ARE GENERALLY MAXIMIZED AT LOW  
TIDES.  
 
FOR SPECIFIC BEACH FORECASTS, VISIT WEATHER.GOV/BEACH/PHI  
 
 
   
PHI WATCHES/WARNINGS/ADVISORIES  
 
PA...NONE.  
NJ...NONE.  
DE...NONE.  
MD...NONE.  
MARINE...NONE.  
 
 
 
 
 
SYNOPSIS...RCM/WUNDERLIN  
NEAR TERM...JOHNSON/RCM  
SHORT TERM...WUNDERLIN  
LONG TERM...WUNDERLIN  
AVIATION...COOPER/DESILVA/JOHNSON/RCM/STAARMANN/WUNDERLIN  
MARINE...DESILVA/JOHNSON/RCM/STAARMANN/WUNDERLIN  
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