Area Forecast Discussion
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000 FXUS61 KPBZ 260806 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 406 AM EDT WED AUG 26 2015 .SYNOPSIS... COOLER CONDITIONS AND SPARSE SHOWER CHANCES CAN BE EXPECTED UNTIL HIGH PRESSURE BEGINS TO REBUILD ON FRIDAY. && .NEAR TERM /UNTIL 6 PM THIS EVENING/...
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TROUGH AXIS WILL DRIFT THROUGH THE AREA TODAY KEEPING IN CLOUDS AND THE RISK FOR SHOWERS...MAINLY ACROSS THE NORTHERN HALF. TEMPERATURES WILL REMAIN BELOW SEASONABLE LEVELS.
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&& .SHORT TERM /6 PM THIS EVENING THROUGH FRIDAY/... THE CLOSED UPPER LOW...TO THE NORTH OF THE GREAT LAKES...WILL BEGIN FILLING IN ON THURSDAY. ANOTHER SHORTWAVE....SWINGING SOUTHWARD IN THE NORTHWEST FLOW ALOFT...WILL CROSS THURSDAY AFTERNOON. THIS SHOULD PROMOTE CU DEVELOPMENT AND KEEP TEMPERATURES BELOW NORMAL. && .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... MODEL GUIDANCE IS IN RELATIVELY GOOD AGREEMENT WITH THE FILLING OF THE EASTERN CONUS UPPER TROUGH BY FRIDAY AND A SHORTWAVE TROUGH APPROACHING 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 /08Z WEDNESDAY THROUGH SUNDAY/... MIDLEVEL SHORTWAVE WILL SWING ACROSS THE FORECAST AREA DURING THE TAF PERIOD. SEVERAL UPSTREAM OBS CONTINUE TO SHOW MVFR CIGS...AND FEEL THAT THESE WILL DEVELOP AT LEAST FROM PIT ON NORTH DURING THE PREDAWN HOURS. SOME PATCHY MVFR FOG IS POSSIBLE AS WELL...WITH CLOUDS KEEPING IT FROM BECOMING MORE WIDESPREAD. KEPT TEMPO MVFR MENTION ACROSS SOUTHEAST OHIO/NORTHERN WEST VIRGINIA. SHRA WILL BE SCATTERED AND LIGHT MAINLY NORTH OF I-80 DURING THE DAY...WITH CIGS MOSTLY IMPROVING TO VFR BY MIDDAY. VFR CONDITIONS WILL THEN MAINTAIN THROUGH THE REST OF THE TAF PERIOD...WITH SOME CLEARING TOWARDS THE TAIL END. WINDS WILL REMAIN LIGHT. CL OUTLOOK...WEDNESDAY NIGHT THROUGH SUNDAY... NO EXTENSIVE IFR IS EXPECTED THROUGH THE WEEKEND. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. && $$

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