Area Forecast Discussion
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000 FXUS61 KPBZ 181516 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 1016 AM EST TUE NOV 18 2014 .SYNOPSIS...
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A CROSSING DISTURBANCE WILL SPREAD SOME LIGHT SNOW OVER THE UPPER OHIO REGION ON WEDNESDAY.
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&& .NEAR TERM /THROUGH TONIGHT/...
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SEE CLIMATOLOGY SECTION BELOW... LATE MRNG UPDATE FEATURED ADJUSTMENT TO HOURLY TRENDS...ESPECIALLY THOSE OF CLDS AND FLURRIES WHICH WL PERSIST INTO THE AFTN AS THE UPR TROF AXIS SLIDES EWD. AN APCHG SHRTWV THROUGH THE BASE OF BROAD UPR LOW WL SPREAD MORE CLDS ACRS THE REGION TNGT...BUT WITH LITTLE TEMP MODERATION DESPITE WEAK WARM ADVCNT INITIATION.
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&& .SHORT TERM /WEDNESDAY THROUGH FRIDAY/...
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THAT DISTURBANCE IS PROJECTED FOR A WEDNESDAY CROSSING WITH SUFFICIENT DYNAMICS AND RELATIVE MSTR FOR A BOUT OF LGT SNOW...ACCUMULATION FM WHICH...ALBEIT LGT...IS EXPECTED TO BE CONFINED TO AREAS N OF I 70. A REINFORCING SHOT OF COLD AIR WL FOLLOW...WITH A LACK OF LAKE FETCH LIMITING SN SHWR POTENTIAL. SCTD SN SHWRS WERE THUS CONFINED TO THE I-80 CORRIDOR AND RIDGES FOR THURSDAY INTO THURSDAY NIGHT. WEAK RIDGE OF HIGH PRESSURE IS EXPECTED TO SUPRESS THAT LTD POTENTIAL AND BGN A TEMP MODERATION ON FRIDAY.
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&& .LONG TERM /FRIDAY NIGHT THROUGH MONDAY/... EVENTUAL SW FLOW IS EXPD TO DVLP OVR THE WKEND AS A BROAD UPR TROF ADVNS ACRS THE CNTRL CONUS. SHRTWVS ROTATING ARND THE BASE OF THE TROF ARE EXPD TO BRING INCRG SHWR CHCS LTR IN THE WKEND INTO ERLY NXT WK AS THEY ADVNS ACRS THE OH VLY AND GT LKS RGN. A WRMG TREND IS FCST AS TEMPS INCR FM BLO AVG SAT...TO SVRL DEG ABV SEASONAL LVLS BY ERLY IN THE WK. THE EVENTUAL PASSAGE OF A CDFNT WITH ONE OF THE ERLY WK SHRTWVS IS EXPD TO BRING TEMPS CLOSER TO AVG BY TUE. && .AVIATION /15Z TUESDAY THROUGH SATURDAY/...
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COLD UPR TROFG ACRS THE GT LKS RGN WL KEEP MAINLY MVFR SC ACRS THE RGN INTO THE AFTN. COND IMPROVEMENT TO VFR SC IS EXPD FOR MOST PORTS THIS AFTN WITH DRY LLVL AIR...THOUGH FKL AND DUJ WL LIKELY STAY MVFR. SCT FLURRIES MAY ALSO CAUSE LCL VSBY RSTRNS WHILE GUSTY WSW SFC WIND WL DMNSH TNGT. OUTLOOK.../WEDNESDAY THROUGH SATURDAY /... MORE RSTRNS ARE EXPD WITH THE PASSAGE OF A WED CDFNT...AND WITH POST FRONTAL COLD AIR SC THRU LT WK.
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&& .CLIMATE...
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THE COLDEST HIGH TEMPERATURE ON RECORD FOR TODAY IN PITTSBURGH WAS 28 DEGREES IN 1959.
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&& .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. && $$ 15

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