Area Forecast Discussion
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000 FXUS61 KPBZ 272340 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 640 PM EST SAT DEC 27 2014 .SYNOPSIS... A COLD FRONT WILL BE ACCOMPANIED BY SHOWERS TONIGHT AND SUNDAY MORNING. A RETURN TO NORMAL AND BELOW-NORMAL TEMPERATURES WILL START TUESDAY. && .NEAR TERM /THROUGH SUNDAY NIGHT/... SHWRS ARE DVLPG IN SWRN OH ATTM AND WILL INCR IN CVRG EARLY THIS EVE AHEAD OF SURGING CDFNT. THESE SHWRS WILL IMPACT ALL OF FCST AREA OVNGT...SO POPS WERE INCRD TO MATCH CURRENT MOS NUMBERS AS PCPN IS XPCD. CDFNT XPCD TO CROSS FCST AREA LATE TNGT AND EARLY SUN MRNG... WHICH WILL PROVIDE A RAPID END FROM N TO S AS DRY AIR INVADES. FOCUS BY AFTN WILL BE FAR SERN ZONES...WHERE TERRAIN MAY SUSTAIN SHWRS LATE IN THE DAY. IT APPEARS THAT ONLY LMTD COLD AIR WILL ARRIVE WHILE PCPN IS ONGOING...SO A BRIEF PD OF RAIN/SNOW WILL BE PSBL AT BACK END OF PCPN AND IN THE RDGS SUN AFTN/EVE. VERY LMTD ACCUMS PSBL IN THE RDGS...AS WARM GROUND ELSEWHERE WILL BE SLOW TO FEEL THE EFFECTS OF COLD AIR ARRIVAL. MAXIMA ON SUN LKLY WILL OCCUR EARLY IN THE DAY AS COLD AIR ARRIVES AND CLDS/PCPN SUPPRESS INSOLATION MUCH OF THE DAY. MINIMA TNGT WILL RMN ELEVATED FOR THE SAME REASON...BUT WILL DROP INTO THE MID 20S-LWR 30S SUN NGT AMID COLD AIR ADVCTN. && .SHORT TERM /MONDAY THROUGH MONDAY NIGHT/... SFC HIPRES IN THE NRN PLNS WILL RDG EWD INTO THE GRTLKS RGN MON- MON NGT. LGT NWLY-NLY LOW-LVL WINDS WILL PERSIST BENEATH STOUT MID-LVL FLOW. DRY AIR SHOULD PRECLUDE PCPN MOST ZONES THIS PD... BUT A DVLPG COASTAL LOW MAY SPREAD LGT PCPN WWD INTO RDGS MON AFTN-EVE. && .LONG TERM /TUESDAY THROUGH SATURDAY/... THE EXTENDED WILL LARGELY BE DRY WITH A DECREASING TREND IN TEMPERATURES AS A BROAD TROUGH IN THE LONGWAVE PATTERN SLOWLY SAGS SOUTH ACROSS THE EASTERN CONUS. && .AVIATION /00Z SUNDAY THROUGH THURSDAY/...
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RAPID DETERIOTATION TO MVFR SHOULD OCCUR THIS EVENING AS LOWERING CIGS MOVE IN AHEAD OF AN INCOMING FRONT. SHIELD OF SHOWERS SHOULD MOVE ACROSS THE ENTIRE AREA BY 06Z...WITH ALL AREAS FALLING DEEP INTO MVFR OR NEAR IFR CONDITIONS. BEYOND 06Z...MOST AREAS WILL LIKELY GO IFR WITH CIGS LIKELY TO REMAIN IFR THROUGH SUNDAY MORNING BEFORE MVFR CONDITIONS RETURN BY AFTERNOON. FRIES OUTLOOK.../SATURDAY NIGHT THROUGH WEDNESDAY/... PERIODIC MVFR RESTRICTIONS CAN BE EXPECTED FOR THE FIRST HALF OF THE WEEK
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&& .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. && $$

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