717  
FXUS61 KPBZ 172305  
AFDPBZ  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE PITTSBURGH PA  
705 PM EDT FRI AUG 17 2018  
   
SYNOPSIS
 
 
PERIODIC SHOWERS AND THUNDERSTORMS ARE EXPECTED THROUGH SATURDAY  
ASSOCIATED WITH A SERIES OF CROSSING DISTURBANCES. DRY WEATHER  
RETURNS SUNDAY WITH HIGH PRESSURE.  
 

 
   
NEAR TERM /UNTIL 6 AM SATURDAY MORNING/
 
 
AN EARLY EVE UPDATE WAS ISSUED TO ADJUST POPS AND WX BASED ON  
THE LATEST RADAR TRENDS.  
 
PREVIOUS...  
A CROSSING SHORTWAVE IN SOUTHWEST FLOW ALOFT IS SUPPORTING THE  
CONVECTION MOVING ACROSS THE REGION THIS AFTERNOON. LIMITED  
INSTABILITY SHOULD PRECLUDE ANY SUSTAINED SEVERE THREAT AND  
MOVEMENT ANY FLOODING OUTSIDE OF AREAS THAT EXPERIENCE TRAINING.  
THAT "TRAINING" POTENTIAL WILL HAVE TO BE MONITORED THOUGH GIVEN  
THE UNIDIRECTIONAL FLOW OVER THE REGION.  
 

 
   
SHORT TERM /6 AM SATURDAY MORNING THROUGH SUNDAY/
 
 
SHOWER AND THUNDERSTORM CHANCES ARE EXPECTED TO CONTINUE  
THROUGH SATURDAY AS THE MAIN UPPER TROUGH, AND ITS ASSOCIATED  
SURFACE COLD FRONT, CROSS THE REGION. TAPERED POPS DOWN FROM N-S  
LATE SAT AND SATURDAY EVENING AS THE FRONT SINKS S. EXPECT  
MAINLY DRY CONDITIONS AREA WIDE BY LATE SATURDAY NIGHT AND  
SUNDAY.  
 

 
   
LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/
 
 
MOST OF MONDAY WILL BE MORE COMFORTABLE WITH DEWPOINTS AROUND  
60 AND DRY CONDITIONS. THE NEXT TROUGH IS PROGGED TO ADVANCE OUT  
OF THE PLAINS AND APPROACH/CROSS OUR REGION TUESDAY THROUGH  
PART OF WEDNESDAY. MAINTAINED LIKELY POPS TUE AS THE TROUGH AND  
ITS ASSOCIATED SFC LOW/COLD FRONT TRACKS ACROSS THE REGION.  
SLIGHT TO LOW CHANCE POPS WERE INCLUDED FOR WEDNESDAY UNTIL THE  
TROUGH EXITS E. NEAR TO ABOVE AVERAGE TEMPERATURES SHOULD FALL  
TO BELOW AVERAGE READINGS BY MIDWEEK.  
 

 
   
AVIATION /23Z FRIDAY THROUGH WEDNESDAY/
 
 
RESTRICTIONS ARE LIKELY THIS EVE AS CONVECTION MOVES ACROSS THE  
REGION. IN ADDITION, MOIST AND WARM SOUTHWEST FLOW IN ADVANCE OF  
AN ENCROACHING FRONTAL BOUNDARY IS EXPECTED TO SUPPORT IFR CIGS  
TONIGHT AND EARLY SATURDAY.  
 
OUTLOOK...  
RESTRICTIONS ARE POSSIBLE UNTIL A COLD FRONT PASSAGE LATE SATURDAY.  
VFR CONDITIONS EXPECTED SUNDAY.  
 

 
   
PBZ WATCHES/WARNINGS/ADVISORIES
 
 
MD...NONE.  
OH...NONE.  
PA...NONE.  
WV...NONE.  
 

 
 

 
 
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