Area Forecast Discussion
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000 FXUS61 KPBZ 262118 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 518 PM EDT TUE AUG 26 2014 .SYNOPSIS... WARM TEMPERATURES WILL PERSIST THROUGH THE WEEK. A SHOWER OR STORM WILL BE POSSIBLE AFTER MIDNIGHT THROUGH WEDNESDAY AS A WEAK COLD FRONT PASSES ACROSS THE REGION. && .NEAR TERM /THROUGH WEDNESDAY/... WITH 515PM UPDATE...ADJUSTED HOURLY TEMPERATURE TRENDS...AS TEMPS FELL SHORT OF PREDICTED HIGHS. ALSO CUT BACK ON CLOUD COVER SOUTH AND EAST OF PITTSBURGH. CANNOT COMPLETELY RULE OUT AN ISOLATED SHOWER CURRENTLY OVER NORTHWESTERN OHIO MAKING IT INTO THE FORECAST AREA THIS EVENING...BUT THINK THIS THREAT IS TOO LOW TO MENTION IN THE FORECAST AT THIS TIME. PREVIOUS DISCUSSION FOLLOWS. HIGH PRESSURE IN PLACE THROUGH EARLY TONIGHT WILL RESULT IN LIMITED CLOUD COVERAGE. A WEAK FRONTAL BOUNDARY WILL PASS OVER THE AREA LATE TONIGHT AND WEDNESDAY BUT IS EXPECTED TO HAVE MINIMAL IMPACTS AS DYNAMICS AREA WEAK. THERE WILL BE A SLIGHT CHANCE OF SHOWERS STARTING AFTER MIDNIGHT ACROSS NORTHERN ZONES... TRANSITIONING TO A SLIGHT CHANCE OF THUNDERSTORMS DURING THE AFTERNOON AS THE ATMOSPHERE BECOMES MARGINALLY UNSTABLE BY THE AFTERNOON WITH DIURNAL HEATING AND LOW LEVEL MOISTURE ADVECTION AHEAD OF THE FRONT. && .SHORT TERM /WEDNESDAY NIGHT THROUGH FRIDAY/... COOLER AND DRIER AIR WILL MOVE IN ACROSS THE AREA WEDNESDAY NIGHT WITH THE FRONTAL BOUNDARY SOUTH OF THE FORECAST AREA. HIGH PRESSURE WILL THEN CONTINUE TO BUILD IN ACROSS THE REGION THURSDAY AND FRIDAY...RESULTING IN DRY AND MILD CONDITIONS. && .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... AN UPR RIDGE WL BEGIN TO SHIFT E SAT. MAINTAINED LOW CHC POPS FOR CNVCTN AS INSTBY BLDS IN SRLY FLOW...THOUGH NO SGFNT UPR SPPRT IS PROGGED. BETTER SHWR/TSTM CHCS WL BE SUN INTO MON AS A SHRTWV ADVNS ACRS THE RGN. TEMPS WL AVG SVRL DEG ABV SEASONAL LVLS. && .AVIATION /21Z TUESDAY THROUGH SUNDAY/... MAINLY VFR CONDS ARE EXPD THRU WED WITH HIGH PRES IN CTRL. A WK CDFNT WL MOVE INTO NW PA LT TNGT WITH AN INCR IN SC AND SCT SHWRS. A PD OF MVFR CIGS ARE PSBL N OF I 80 AFT FROPA. THE CDFNT WL ADVN SWD THRU WED WITH SCT SHWRS. TSTMS ARE ALSO PSBL WED AFTN MAINLY S OF PIT. OUTLOOK.../WEDNESDAY NIGHT THROUGH SUNDAY/... ADVNG GT LKS LOW PRES WL BRING PSBL SHWR/TSTM RSTRNS SUN. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. && $$

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