Area Forecast Discussion
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000 FXUS61 KPBZ 281847 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 247 PM EDT TUE OCT 28 2014 .SYNOPSIS...
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AN ADVANCING COLD FRONT WILL BRING A PERIOD OF SHOWERS THIS EVENING. COOL HIGH PRESSURE IS EXPECTED FOR MID WEEK.
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&& .NEAR TERM /UNTIL 6 AM WEDNESDAY MORNING/...
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LOW PRES ACRS ONTARIO WL CONT TO DRIFT NWD AS IT/S ASSOCIATED CDFNT CROSSES THE GT LKS AND OH VLY RGN THIS EVE. A PD OF SHWRS IS EXPD INVOF THE FNT. MRNG INSTBY CHARTS/RAOBS AND LATEST MESO DATA INDICATE LTL SPPRT FOR TSTMS...SO MAINTAINED ONLY SLGT CHCS INTO THIS EVE. WITH 40-50KT MID LVL WNDS ANY TSTMS THAT DO DVLP COULD BE GUSTY. SHWRS WL END FM W-E AS THE FNT CROSSES. LOW TEMPS SHOULD AVG FM 5-10 DEG ABV SEASONAL LVLS.
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&& .SHORT TERM /6 AM WEDNESDAY MORNING THROUGH FRIDAY/...
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SFC RIDGING IS EXPD TO BLD IN WED AND THU UNDER BROAD UPR TROFG ACRS THE ERN CONUS. A WK SHRTWV ROTATING THRU THE UPR TROF WL CROSS THE GT LKS RGN WED NGT. INCLUDED A BRIEF LOW CHC FOR SHWRS N OF I 80 AS WNW FLOW OVR LK ERI COULD PROVIDE SOME LK ENHANCEMENT FOR PCPN. BY FRI THE SFC RIDGING BREAKS DOWN AS THE UPR TROF DEEPENS. ANOTHER...STRONGER SHRTWV AND ASSOCIATED CDFNT IS EXPD FOR A LT FRI PASSAGE WITH INCRG SHWR CHCS THRU THE DAY. NR SEASONAL AVG TEMPS WED SHOULD DCRS TO 5-10 DEG BLO AVG BY LT WK.
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&& .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/...
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RAIN SHOWERS ARE EXPECTED TO MIX WITH AND CHANGE TO SNOW SHOWERS FRIDAY NIGHT/SATURDAY MORNING IN THE MUCH COLDER AIR BEHIND THE LT FRI SHRTWV. THERE ARE STILL TIMING ISSUES ON HOW FAST THE COLD AIR WILL CROSS THE AREA. COLD DAY SATURDAY WITH PLENTY OF CLOUDS AND MORNING SNOW SHOWERS POSSIBLE. CANADIAN HIGH BUILDS IN SUNDAY ALLOWING FOR DRY CONDITIONS AND MODERATING TEMPS FOR THE REMAINDER OF THE LONG TERM.
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&& .AVIATION /19Z TUESDAY THROUGH SUNDAY/...
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SFC WIND WL BE THE PRIMARY AVIATION CONCERN INTO THE AFTN AS GUSTS OF 20 TO 25 KT ARE FORECAST AS LOW PRES DEEPENS OVR THE WRN LAKES. THAT SYSTEMS CDFNT WL DETERIORATE CONDITIONS...MAINLY TO MVFR IN SHWRS...LATE THIS AFTN AND EARLY EVE. VFR WL QUICKLY RESUME LTR THIS EVE IN THE DRY WLY FLOW BEHIND THE FRONT. OUTLOOK.../TUESDAY NGT THROUGH SUNDAY/... THE NXT WIDESPREAD RESTRICTION POTENTIAL IS EXPECTED WITH A FRIDAY CDFNT.
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&& .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. && $$ 07/15

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