Area Forecast Discussion
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000 FXUS61 KPBZ 270426 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 1226 AM EDT MON JUL 27 2015 .SYNOPSIS...
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WARM AND HUMID WEATHER WILL DOMINATE THE UPPER OHIO VALLEY REGION UNTIL A COLD FRONT PASSES ON WEDNESDAY NIGHT.
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&& .NEAR TERM /THROUGH TONIGHT/...
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NO CHANGES WERE NEEDED FOR THE OVERNIGHT PORTION OF THE NEAR TERM FORECAST AS SHOWERS HAVE DISSIPATED OUTSIDE OF THE WV/MD RIDGE ZONES. OTHERWISE...PLENTY OF MID AND HIGH LEVEL CLOUDINESS SHOULD INHIBIT FOG FORMATION THIS MORNING OUTSIDE OF THE LOCALIZED RAIN AREAS. OTHERWISE...A WARM...HUMID DAY IS ANTICIPATED AS BUILDING HIGH PRESSURE INITIALLY CAPS A STILL MOIST BOUNDARY LAYER. SLIGHT TO CHANCE PRECIP PROBS UNDER THE WARMING ATMOSPHERIC COLUMN WERE ADJUSTED OVER THE RIDGE AREAS AND COUNTIES ALONG AND SOUTH OF I 70...WHERE WEAK TOPOGRAPHIC SUPPORT...A RIDGE BREEZE...AND EVENTUAL POSITION OF THE MEANDERING FRONT MAY PROVIDE ENOUGH LIFT IN THE DESTABILIZED AIRMASS TO SUPPORT CONVECTION THIS AFTERNOON AND THIS EVENING.
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&& .SHORT TERM /TUESDAY THROUGH THURSDAY/...
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AS THE UPPER LEVEL RIDGE AMPLIFIES OVER THE REGION TUESDAY AND WEDNESDAY...IN RESPONSE TO NORTHERN PLAINS TROUGHING...TEMPS WILL RISE TO ABOUT 5 OR 10 DEGREES ABOVE THE AVERAGES DEPENDING ON LOCATION. THE NEAR 90 TEMPS AND MID TO UPR 60S DEWPOINTS WILL DRIVE HEAT INDICES THROUGH THE 90S...WITH RELIEF COMING ON WEDNESDAY AS RAIN CHANCES RISE WITH THE APPROACH OF A COLD FRONT.
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&& .LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/... MODELS COMING INTO FAIRLY GOOD AGREEMENT ON UPPER LEVEL RIDGE SHIFTING WEST TOWARD THE SOUTHERN ROCKIES LATE WEEK WITH DRIER AND COOLER NORTHWEST FLOW DEVELOPING ACROSS THE EASTERN STATES. COLD FRONT WILL APPROACH WEDNESDAY NIGHT AND CROSS THE RIDGES BY THURSDAY EVENING. WENT WITH HIGHER CHANCE POPS FOR FROPA. LESS HUMID WITH SEASONAL TEMPERATURES FRIDAY INTO SATURDAY. && .AVIATION /04Z MONDAY THROUGH FRIDAY/...
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LOW LEVEL MOISTURE IS EXPECTED TO BRING A GRADUAL DETEIORATION TO MVFR FOG FOR AREA PORTS THROUGH EARLY MORNING...WITH PATCHY IFR ESPECIALLY WHERE RAIN FELL SUNDAY. A RETURN TO VFR IS EXPECTED BY MID TO LATE MORNING AS MIXING ERODES THE FOG...THOUGH CU RULE AND SOUNDINGS INDICATE VFR DIURNAL CU. A WEAK SURFACE BOUNDARY COULD BRING A FEW AFTERNOON SHOWERS WELL S OF PIT BUT WILL LEAVE THE MENTION OUT AT SOUTHERN PORTS FOR NOW. OUTLOOK...MONDAY NIGHT THROUGH FRIDAY... RESTRICTIONS ARE POSSIBLE WITH A LATE WEDNESDAY/EARLY THURSDAY COLD FRONT.
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&& .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. && $$ 15/07

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