160  
FXUS61 KPBZ 230145  
AFDPBZ  
 
AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE PITTSBURGH PA  
945 PM EDT TUE AUG 22 2017  
   
SYNOPSIS
 
 
QUIETER WEATHER WEDNESDAY BEFORE SHOWERS RETURN THURSDAY.  
COOLER AND LESS HUMID ARE THE THEMES THROUGH THE WEEKEND.  
 

 
   
NEAR TERM /THROUGH WEDNESDAY/
 
 
A COLD FRONT CROSSING THE REGION AND CURRENTLY JUST ENTERING THE  
EASTERN FRINGES OF THE FORECAST WILL BE ACCOMPANIED BY A BRIEF  
PERIOD OF SHOWERS. THE BOUNDARY WILL BE EAST OF THE REGION  
SHORTLY AFTER MIDNIGHT FOLLOWED BY DRY CONDITIONS.  
 
A BREAK FROM THE HIGH HUMIDITY AND RAINFALL WEDNESDAY. THERE  
WILL BE A DECENT CU FIELD, HOWEVER IT WILL BE NOTICEABLY LESS  
HUMID AS DEWPOINTS ARE FORECAST TO BE IN THE 50S!  
 

 
   
SHORT TERM /WEDNESDAY NIGHT THROUGH FRIDAY NIGHT/
 
 
NORTHWEST FLOW ALOFT ALLOWS RIPPLES OF ENERGY TO ROUND THE BASE  
OF THE H5 TROUGH AXIS POSITIONED OVER THE EASTERN UNITED STATES.  
PLENTY OF LOW LEVEL MOISTURE IN PLACE THROUGH THURSDAY EVENING  
TO WARRANT THE MENTION OF SCATTERED SHOWERS ESPECIALLY FOR OUR  
NORTHERN COUNTIES CLOSER TO LAKE ERIE. THE STRONGEST WAVE  
CROSSES THURSDAY AFTERNOON, WHICH SHOULD BRING SHOWERS GIVEN  
COOLING ALOFT TO THE MASON / DIXON LINE. FUTURE SHIFTS MAY HAVE  
TO EXTEND THE MENTION OF SHOWERS TO NORTHERN WEST VIRGINIA AND  
WESTERN MARYLAND. DO NOT EXPECT TO SEE MUCH SUNSHINE THURSDAY AS  
ANY HEATING WILL FILL THE SKY WITH A STRATOCU FIELD.  
 
DAYTIME SHOWERS WILL WANE WITH SUNSET WHILE ANTICYCLONIC  
VORTICITY ADVECTION. THIS WILL START THE RUN OF A DRY WEATHER  
THE BALANCE OF THE SHORT TERM.  
 

 
   
LONG TERM /SATURDAY THROUGH TUESDAY/
 
 
HIGHLIGHTS:  
- PLEASANT WEATHER PROJECTED  
- DRY MOST OF THE EXTENDED  
- BELOW NORMAL TEMPS  
 
THE DEPARTING MID LEVEL TROUGH AND ASSOCIATED LOW PRESSURE SYSTEM  
OWES TO SEVERAL NICE WEATHER DAYS LATE THIS WEEK THROUGH THE  
WEEKEND. SURFACE HIGH PRESSURE BUILDS SOUTH FROM THE GREAT LAKES  
AND WITH NORTHERLY FLOW ON THE FRONT END EXPECT BELOW NORMAL  
TEMPERATURES TO CONTINUE INTO THE MIDDLE OF NEXT WEEK. TOWARD THE  
END OF THE FORECAST /NEXT TUESDAY/, MOISTURE FROM THE GULF  
RESULTING FROM HARVEY MAY PROVIDE A CANOPY OF HIGH CLOUDS, BUT  
STILL PLENTY OF TIME TO RESOLVE THAT OVER THE COMING DAYS.  
 

 
   
AVIATION /02Z WEDNESDAY THROUGH SUNDAY/
 
 
DRIER AIR AND WEST NORTHWEST WINDS WILL FOLLOW A CROSSING COLD  
FRONT TONIGHT. THERE IS A LOW PROBABILITY OF FOG DEVELOPMENT  
DURING THE PREDAWN HOURS.  
   
OUTLOOK
 
 
NO WIDESPREAD IFR WEATHER IS FORECAST.  
 

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

 
 

 
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab OH Page
The Nexlab PA Page
The Nexlab WV Page
The Nexlab MD Page Main Text Page