Area Forecast Discussion
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000 FXUS61 KPBZ 280006 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 806 PM EDT THU AUG 27 2015 .SYNOPSIS... WARMER WEATHER CAN BE EXPECTED FOR THE WEEKEND AS HIGH PRESSURE BUILDS. RAIN CHANCES RETURN ON SUNDAY WITH A WEAK COLD FRONT. && .NEAR TERM /UNTIL 6 AM FRIDAY MORNING/...
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CLOUDS ARE SLOWLY DISSIPATING AWAY FROM A BAND OF REMAINING CLOUD COVER THAT BISECTS THE FORECAST AREA RIGHT DOWN THE CENTER FROM WEST TO EAST. UNFORTUNATELY...THIS BAND REMAINS SMACK OVER PITTSBURGH LATE THIS EVENING. HOWEVER...NORTHWESTERLY FLOW REMAINS THROUGHOUT THE COLUMN...AND DRIER AND MORE STABLE AIR WILL CONTINUE TO WORK IN OVERNIGHT. THIS SHOULD FORCE THE BAND OF CLOUDS TO SLOWLY DISSIPATE AS IT SAGS SLOWLY EAST-SOUTHEASTWARD. THE NET RESULT WILL LIKELY BE MOSTLY CLEAR SKIES ACROSS THE ENTIRE CWA BY MORNING. WITH AN EXPECTATION OF CLEARING OVERNIGHT...LOW TEMPERATURES WERE CUT A BIT FOR MOST LOCATIONS. AREAS WHICH EXPERIENCE THE LONGEST DEGREE OF CLEARING...SUCH AS ALONG I-80...WILL LIKELY DROP INTO THE 40S OVERNIGHT. THE AREAS WITH THE LEAST LONGEVITY OF CLEARING WILL REMAIN IN THE 50S. BOTH THERMAL REGIMES ARE STILL BELOW NORMAL...HOWEVER. FRIES
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&& .SHORT TERM /6 AM FRIDAY MORNING THROUGH SATURDAY/... ZONAL FLOW...RISING HEIGHTS...AND WITH HIGH PRESSURE IN PLACE...EXPECT TO EXPERIENCE PLENTIFUL SUNSHINE WITH A FEW DIURNAL CUMULUS. TEMPERATURES ARE EXPECTED TO RISE TO SEASONABLE LEVELS ON FRIDAY. BENIGN CONDITIONS WILL CONTINUE INTO EARLY SATURDAY WHILE SOUTHWEST FLOW AHEAD OF AN APPROACHING SHORTWAVE WILL PROMOTE INCREASING TEMPERATURES AND MOISTURE. HAVE SLIGHTLY INCREASED POPS TO THE WEST TO ACCOUNT FOR DIURNAL SHOWERS AND POSSIBLE THUNDERSTORMS AS THE WEAKENING SHORTWAVE APPROACHES AND GREATER INSTABILITY IS INDICATED BY MODEL SOUNDINGS. TEMPERATURES WERE ADJUSTED TO NEAR MOS GUIDANCE FOR THE PERIOD. && .LONG TERM /SATURDAY NIGHT THROUGH THURSDAY/... MODEL GUIDANCE IS IN RELATIVELY GOOD AGREEMENT WITH THE FILLING OF THE EASTERN CONUS UPPER TROUGH AND A SHORTWAVE APPROACH THIS WEEKEND. THIS WILL SUPPORT A TEMPERATURE MODERATION TO...THEN ABOVE THE AVERAGES...ALTHOUGH INCREASED MOISTURE IN THE DEVELOPING SOUTHWEST FLOW COULD LEAD TO DIURNAL SHOWERS AND THUNDERSTORMS SATURDAY NIGHT AND SUNDAY. SURFACE HIGH PRESSURE RETURNS NEXT WEEK. && .AVIATION /00Z FRIDAY THROUGH TUESDAY/... BUILDING HIGH PRESSURE SHOULD CONTINUE TO BRING CLEARING SKIES TONIGHT. PREDAWN MVFR FOG IS EXPECTED TO BE AN ISSUE FRIDAY MORNING AS AIR NEAR THE SURFACE BECOMES SATURATED...WITH LOCAL IFR ANTICIPATED ALSO. VFR CONDITIONS SHOULD QUICKLY RETURN BY MID MORNING FRIDAY AS THE FOG DISSIPATES. OUTLOOK...FRIDAY NIGHT THROUGH TUESDAY... NO EXTENSIVE IFR IS EXPECTED THROUGH THE WEEKEND. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. && $$

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