Area Forecast Discussion
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FXUS61 KPBZ 220725
AFDPBZ

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
325 AM EDT WED OCT 22 2014

.SYNOPSIS...
SHOWER POTENTIAL WILL CONTINUE TO DIMINISH AS UPPER LOW PRESSURE
EXITS EASTWARD. A STRENGTHENING HIGH WILL DRY AND WARM THE UPPER
OHIO VALLEY REGION INTO NEXT WEEK.

&&

.NEAR TERM /THROUGH TODAY/...
MATURATION OF LOW PRES IS STILL MDL PROGGED OVR THE COAST BY DAYS
END AND OVRALL SBSDNC WL GRADUALLY SUPPRESS CONVECTIVE POTENTIAL
OVR MOST OF THE UPR OH VALLEY AREA...ALTHOUGH SLGT SHWR CHCS MAY
LINGER INTO EVE OVR THE RIDGES WITH THE SHARPER UPSLOPE
ASSISTANCE.

COLD TEMPS WL LINGER THOUGH AS COLD...TO NEUTRAL ADVCTN CONTS ON
THE REAR FLANK OF THE EXITING LOW. TEMPS ABOUT 10 DEGREES UNDR THE
AVGS WERE MASSAGED USING SREF MEANS AND BIAS CORRECTED GFS MOS.

&&

.SHORT TERM /TONIGHT THROUGH SATURDAY/...
SHRTWV RIDGING IS FORECAST TO SUPPRESS RMNG PCPN CHCS TNGT...AND
INTO FRIDAY.

THEREAFTER...NAM...GFS...AND ECMWF HAVE CONSISTENTLY DEPICTED THE
APCH...AND PASSAGE OF A WEAK SHRTWV IN NW FLOW ON FRIDAY. GIVEN
DEPICTIONS OF A LTD MID LVL MSTR FIELD...CAPPED LOW LVLS AFTR MID
LVL WARMING...AND AN ABSENT PCPN SPPRTG OMEGA FIELD...HAVE DECIDED
TO ELIMINATE THE ALREADY SLGT POP FORECAST IN FAVOR A STRENGTHENING
DRY TREND.

ANOTHER SUCH DISTURBANCE IS PROJECTED FOR A SATURDAY CROSSING...BUT
THE RAIN POTENTIAL LKS EQUALLY SLIM GIVEN SIMILIAR LIMITATIONS AS
FRIDAY AS WELL AS A MORE NWD TRACK OF THE LOW CNTR.

SHORT TERM TEMPS FEATURE MODERATION TWD THE SEASONAL AVGS...FORECAST
FOR WAS TWEAKED AGAIN USING BIAS CORRECTED GFS MOS AND SREF MEANS.

&&

.LONG TERM /SATURDAY NIGHT THROUGH TUESDAY/...
RIDGING ACRS THE CNTRL CONUS WL MOVE TO THE ERN CONUS THRU ERLY
NXT WK KEEPING DRY WEA IN THE FCST. A WKNG TROF IS PROGGED FOR A
MID WK PASSAGE AS THE RIDGE SHIFTS E. SEASONALLY COOL WKEND TEMPS
ARE EXP TO INCR TO ABV AVG LVLS BY ERLY NXT WK.

&&

.AVIATION /06Z WEDNESDAY THROUGH SUNDAY/...
WDSPRD IFR CONDS AND SCT SHWRS ARE EXPD THRU ERLY THIS MRNG WITH
LLVL MOISTURE IN PLACE UNDER AN UPR LOW ACRS THE RGN. WHILE CONDS
SHOULD IMPROVE TO MVFR LTR IN THE MRNG...THE PROXIMITY OF THE UPR
LOW WL KEEP MVFR CONDS INTO TNGT.

.AVIATION /THURSDAY THROUGH SUNDAY/...
RSTRNS ARE EXPD INTO THU MRNG BEFORE THE UPR LOW EXITS THE RGN.

&&

.PBZ WATCHES/WARNINGS/ADVISORIES...
MD...NONE.
OH...NONE.
PA...NONE.
WV...NONE.

&&

$$

15/07




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