124  
FXUS61 KPBZ 171147  
AFDPBZ  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE PITTSBURGH PA  
747 AM 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 UNDER HIGH PRESSURE.  
 

 
   
NEAR TERM /UNTIL 6 PM THIS EVENING/
 
 
ADDITIONAL SHORTWAVES IN SW FLOW AHEAD OF THE MAIN TROUGH WILL  
SUPPORT PERIODIC SHOWER AND THUNDERSTORM CHANCES TODAY. SHEAR IS  
PROGGED TO INCREASE SOME, THOUGH CLOUD COVER WILL LIMIT  
INSTABILITY.  
 

 
   
SHORT TERM /6 PM THIS EVENING THROUGH SUNDAY/
 
 
SHOWER AND THUNDERSTORM CHANCES ARE EXPECTED TO CONTINUE TONIGHT  
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 THURSDAY/
 
 
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 /12Z FRIDAY THROUGH TUESDAY/
 
 
WILL CARRY GENERAL MVFR CIGS THROUGH MOST OF THE DAY. COVERAGE  
OF SHOWERS SHOULD INCREASE THIS AFTERNOON, LEADING TO A  
CONTINUATION OF GENERAL MVFR CONDITIONS. A STRONGER  
DISTURBANCE WILL CROSS THIS AFTERNOON AND EVENING, SO VCSH AND  
MVFR CIGS LOOKS REASONABLE INTO THE EVENING HOURS.  
 
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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