Area Forecast Discussion
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000
FXUS61 KPBZ 222332
AFDPBZ

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
732 PM EDT WED OCT 22 2014

.SYNOPSIS...
UPPER LOW PRESSURE SHOULD CONTINUE TO PUSH EAST...ALLOWING A HIGH TO
BUILD IN...RESULTING IN DRY AND WARM WEATHER INTO THE WEEKEND.  A
COLD FRONT MAY BRING A FEW SHOWERS TO THE AREA LATE THIS WEEKEND.

&&

.NEAR TERM /THROUGH THURSDAY/...
730PM UPDATE...CLOUDS OVERNIGHT WILL BE THE FORECAST HEADACHE.
LATEST SAT PICS ARE SHOWING DRIER AIR BEGINNING TO INTRUDE IN THE
STRATOCU DECK IN NW PA AND NE OHIO. LATEST HIRES DATA IS
PRESENTING AN EXPANSION OF THIS DRY AIR OVERNIGHT. HAVING A HARD
TIME BELIEVING THIS AS FORECAST SOUNDINGS CONTINUE TO KEEP A
SATURATED LAYER AND CYCLONIC ROTATION CONTINUES IN THE MID AND
LOWER LEVELS OVERNIGHT. HAVE DECREASED CLOUDS JUST A BIT... BUT DO
NOT EXPECT MUCH IMPROVEMENT UNTIL LATER THU MORNING. TEMPS HAVE
BEEN UPDATED WITH LATEST LAMP NUMBERS.

PREVIOUS DISCUSSION...

UPPER LOW...CENTERED OFF THE DELMARVA COAST...WILL MOVE NORTHEAST
THROUGH THE PERIOD.  AS THIS SYSTEM PUSHES AWAY...MODELS INDICATE
SURFACE HIGH PRESSURE WILL NOSE IN.

AS A RESULT...PRECIPITATION CHANCES WILL CONTINUE TO DIMINISH...WITH
MOST LOCATIONS DRY BEFORE SUNRISE ON THURSDAY.

USED A BLEND OF MET/MAV GUIDANCE FOR TEMPS TONIGHT AND THURSDAY.

&&

.SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY/...
MODELS CONTINUE TO INDICATE SHORTWAVE RIDGING WILL PUSH EAST ACROSS
THE AREA THURSDAY NIGHT INTO FRIDAY.  A SHORTWAVE WILL THEN PUSH
ACROSS FRIDAY INTO FRIDAY NIGHT.  SOME OF THE MODELS INDICATE SPOTTY
PRECIPITATION WITH THIS FEATURE...AND HAVE SLIGHT CHANCE POPS ACROSS
NORTHWEST PA ON FRIDAY.

MODELS THEN INDICATE A COLD FRONT WILL PUSH SOUTHEAST INTO THE
REGION ON SATURDAY.  AFTER DRY WEATHER FRIDAY NIGHT...HAVE
RE-INTRODUCED SLIGHT CHANCE POPS ACROSS THE NORTHERN ZONES FOR
SATURDAY.

&&

.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
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 /00Z THURSDAY THROUGH MONDAY/...
WIDESPREAD MVFR CIGS WILL LINGER OVERNIGHT UNDER CONTINUED
CYCLONIC FLOW. CLOUDS WILL SLOWLY ERODE FROM WEST TO EAST AFTER
12Z THURSDAY...AFTER WHICH VFR CONDITIONS WILL RULE. CANNOT RULE
OUT A FEW SITES SCATTERING OUT EARLIER THAN CURRENTLY EXPECTED AS
DRY AIR TRIES TO INTRUDE FROM THE NORTH...BUT FEEL THAT CLOUDS
WILL HOLD ON TOUGH.  N/NW WINDS WILL SLACKEN OFF THIS EVENING.

.AVIATION /THURSDAY THROUGH SUNDAY/...
NO WIDESPREAD RESTRICTIONS ARE EXPECTED.

&&

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

&&

$$






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