114  
FXUS61 KCTP 020520  
AFDCTP  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE STATE COLLEGE PA  
120 AM EDT WED JUL 2 2025  
   
SYNOPSIS  
 
* SHOWERS AND THUNDERSTORMS, SOME WITH LOCALLY HEAVY DOWNPOURS,  
WILL DIMINISH OVERNIGHT  
* DRIER/LESS HUMID/MORE COMFORTABLE CONDITIONS ARE LIKELY FOR  
MID TO LATE WEEK, WITH A HIGH CONFIDENCE OF DRY WEATHER AND  
SEASONABLE TEMPERATURES ON INDEPENDENCE DAY  
* TRENDING WARMER AND MORE HUMID THIS WEEKEND; UNSETTLED PATTERN  
RETURNS BY SUNDAY  
 
 
   
NEAR TERM /THROUGH TODAY/  
 
11 PM UPDATE... ISOLATED-WIDELY SCATTERED SHOWERS AND  
THUNDERSTORMS ALONG THE SURFACE COLD FRONT ARE LOSING STEAM AS  
THEY PUSH SOUTHEAST ACROSS THE COMMONWEALTH AND ENCOUNTER AN AIR  
MASS CHEWED UP/STABILIZED BY EARLIER CONVECTION. IN THE  
MEANTIME, A FEW LIGHT SHOWERS/SPRINKLES ARE TRAVERSING THE LOWER  
SUSQUEHANNA VALLEY. ALL OF THIS ACTIVITY SHOULD CONTINUE TO  
DWINDLE OVERNIGHT, AS A SOMEWHAT DRIER AIR MASS AND SUBSIDENCE  
ALOFT SLOWLY OVERTAKE THE REGION.  
 
THE EARLIER FLOOD WATCH FOR AREAS NEAR AND SOUTH OF I-80 HAS  
BEEN DISCONTINUED.  
 
PREVIOUS DISCUSSION... 615 PM UPDATE... THE MOST ROBUST  
CONVECTION IS NOW LARGELY ALONG AND EAST/SOUTHEAST OF A PRE-  
FRONTAL SURFACE TROUGH OVER THE COASTAL PLAIN, WHERE DEEPER  
INSTABILITY AND HIGHER PRECIPITABLE WATER VALUES EXIST. ALTHOUGH  
HIT AND MISS SHOWERS AND THUNDERSTORMS COULD STILL IMPACT  
CENTRAL PA THIS EVENING, AHEAD OF THE MAIN SURFACE COLD FRONT  
THAT WILL BE SLOWLY COMING THROUGH THE REGION, SEVERE STORMS  
WOULD SEEM EXTREMELY UNLIKELY, THUS THE CANCELLATION OF THE  
SEVERE THUNDERSTORM WATCH.  
 
GIVEN ONGOING RUNOFF ISSUES AND EXTREMELY WET ANTECEDENT  
CONDITIONS, PARTICULARLY NEAR AND SOUTH OF I-78/US-22 IN THE  
SUSQUEHANNA VALLEY, THE FLOOD WATCH WILL STAY IN TACT AT THIS  
TIME.  
 
 
   
SHORT TERM /TONIGHT THROUGH FRIDAY/  
 
SHOWER ACTIVITY SLOWLY SHIFTS TO THE SOUTHEAST TONIGHT WITH ANY  
POST FRONTAL CLEARING EXPECTED TO RESULT IN FOG FORMATION INTO  
WEDNESDAY MORNING. THE LATEST HREF ALSO SUGGESTS SOME LOW CLOUDS  
AND STRATUS MAY LINGER INTO THE EARLY MORNING WEDNESDAY.  
 
ON BALANCE, THIS PERIOD WILL FEATURE A DRYING TREND WITH LITTLE  
TO NO RAINFALL AND MORE COMFORTABLE HUMIDITY. BEST ODDS FOR A  
COUPLE OF PM SHOWERS/T-STORM WILL BE THURSDAY AFTERNOON  
ASSOCIATED WITH A SECONDARY COLD FRONT MOVING SOUTHEAST FROM  
EASTERN CANADA AND THE NORTHERN GREAT LAKES.  
 
WE CONTINUE TO HAVE HIGH CONFIDENCE/CONVICTION IN A REALLY NICE  
INDEPENDENCE DAY WITH A NEAR ZERO CHANCE FOR RAIN AND GREAT  
VIEWING FOR FIREWORKS. MIN TEMPS FRIDAY NIGHT WILL BE QUITE  
COMFORTABLE IN THE LOW 50S TO LOW 60S.  
 
HUMIDITY LEVELS START TO CREEP UPWARD TO START THE FIRST  
WEEKEND OF JULY; HOWEVER IT WILL REMAIN DRY WITH UNSETTLED  
WEATHER EXPECTED TO RETURN SUNDAY INTO EARLY NEXT WEEK.  
 
 
   
LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/  
 
LOW PRESSURE APPROACHING THE GREAT LAKES BY SUNDAY MORNING WILL  
BRING ABOUT INCREASING CHANCES FOR PRECIPITATION FOR THE SECOND  
HALF OF THE WEEKEND AND INTO THE BEGINNING OF NEXT WEEK.  
 
 
   
AVIATION /05Z WEDNESDAY THROUGH SUNDAY/  
 
AS OF 1 AM, STARTING TO SEE SOME FOG AT BFD AND A FEW OTHER  
SITES.  
 
ASIDE FROM THE FOG, MAIN ISSUE OVERNIGT INTO THE FIRST PART  
OF WEDNESDAY WILL BE SHOWERS AT MDT AND LNS.  
 
SOME MINOR ADJUSTMENTS TO THE TAFS FOR THE 06Z SET.  
 
EARLIER DISCUSSION BELOW.  
 
GIVEN WIDESPREAD RAINFALL THIS AFTERNOON AND EARLY EVENING, PLUS  
ONLY SLOW INFUSION OF DRIER AIR IN THE LOWER LEVELS OF THE  
ATMOSPHERE OVERNIGHT, PATCHES OF LOWER CLOUDS AND FOG SEEM  
LIKELY. WE HAVE THE HIGHEST CONFIDENCE IN THAT SCENARIO OVER  
THE ALLEGHENIES (KBFD AND KJST), WHERE SOME IFR IS EXPECTED.  
 
ON WEDNESDAY, A BETTER PUSH OF DRY AIR SHOULD RESULT IN VFR  
CONDITIONS AREA-WIDE (VERY HIGH CONFIDENCE).  
 
OUTLOOK...  
 
THU...PRIMARILY VFR; STRAY PM SHOWER/T-STORM POSSIBLE.  
 
FRI-SUN...AM FOG POSSIBLE; OTHERWISE VFR.  
 
 
   
CTP WATCHES/WARNINGS/ADVISORIES  
 
NONE.  
 
 
 
 
 
SYNOPSIS...STEINBUGL  
NEAR TERM...JUREWICZ/STEINBUGL  
SHORT TERM...STEINBUGL  
LONG TERM...BANGHOFF/NPB  
AVIATION...JUREWICZ/MARTIN/BOWEN  
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