-- Discussion containing changed information from previous version are highlighted. --
000
FXUS61 KPBZ 192327
AFDPBZ

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
727 PM EDT SUN MAY 19 2013

.SYNOPSIS...
A SERIES OF WEATHER DISTURBANCES WILL BRING PERIODIC SHOWER AND
THUNDERSTORM CHANCES THROUGH THURSDAY. HIGH PRESSURE WILL BUILD IN
FRIDAY.

&&

.NEAR TERM /THROUGH MONDAY/...
STLT/MESO DATA SHOWS AN UPR LVL WAVE OVR CNTRL WV. THIS WL CONT TO
DRIFT SLOWLY EWD THRU MON. ISOLD SHWRS/TSTMS S OF PIT SHOULD
QUICKLY DSPT AFT SUNSET. NEAR TERM MDL DATA SHOWS POTENTIAL FOR
STRATUS DVLPG AREAS N-E OF PIT TWD MRNG AS WELL. WL KEEP CHC POPS
FOR SHWRS/TSTMS MAINLY E-SE OF PIT MON AS THE UPR WV BEGINS TO
EXIT TO THE E. MDL PROGS SHOW INSTAB SHOULD BE MINIMAL MON. WELL
ABV AVG TEMPS FCST FOR MON.

&&

.SHORT TERM /MONDAY NIGHT THROUGH TUESDAY/...
ANY CONVECTION SHOULD BE DSPTG MON EVE AS THE UPR WAVE CONTS TO
MOVE OUT. CHC FOR SHWRS/TSTMS RETURNS TUE AFTN...ALTHOUGH SOME UPR
AND MID LVL RIDGING AND LACK OF A GOOD TRIGGER SHOULD HELP LMT
ACTIVITY. TEMPS WL CONT MUCH ABV AVG.

&&

.LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/...
-- Changed Discussion --
THE DISTRICT REMAINS IN THE WARM SECTOR FOR TUESDAY NIGHT THROUGH
WEDNESDAY NIGHT. TEMPERATURES WILL REMAIN ABOVE NORMAL ALONG WITH
A CHANCE OF DIURNAL SHOWERS AND THUNDERSTORMS. A COLD FRONT
MOVING SLOWLY SOUTH FROM THE GREAT LAKES THURSDAY WILL BRING
LIKELY SHOWERS AND THUNDERSTORMS FOR LATE THURSDAY AFTERNOON INTO
THURSDAY NIGHT. BEHIND THE COLD FRONT FRIDAY THE RISK OF SHOWERS
WILL DIMINISH AND TEMPERATURES WILL DROP BELOW NORMAL. DRY WEATHER
CAN BE EXPECTED FOR FRIDAY NIGHT INTO SUNDAY WITH TEMPERATURES
FALLING INTO THE 40S FOR OVERNIGHT LOWS SATURDAY MORNING.
-- End Changed Discussion --

&&

.AVIATION /23Z SUNDAY THROUGH FRIDAY/...
-- Changed Discussion --
VFR CONDS EXPD INTO THE EVE...EXCPT FOR DUJ WHERE MVFR CIGS ARE
EXPD TO CONT. AS LLVL MOISTURE INCRS EXP DUJ CIGS WL DROP TO IFR
LTR THIS EVE AND CONT OVRNGT. ELSW...COULD SEE SOME PTCHY STRATUS/MVFR
BR DVLPG OVRNGT. EXTENT OF THE STRATUS IS UNCERTAIN...WITH THE
MOST LIKELY PLACES TO SEE CIGS S-E OF PIT...AS WELL AS FKL/DUJ.
CONDS SHOULD RETURN TO VFR ACRS THE RGN MON MRNG. AN EXITING UPR
LVL WAVE MAY BRING A SHWR/TSTM E OF PIT BUT CONFIDENCE TOO LOW FOR
MENTION IN TAFS ATTM.

.OUTLOOK.../MONDAY NIGHT THROUGH FRIDAY/...
CHC FOR SHWR/TSTMS WL CONT TUE AFTN AND INCR THRU THU EVE AS A
CDFNT APRCHS AND MOVES THRU. BLDG HIGH PRES AND VFR CONDS EXPD
FRI.
-- End Changed Discussion --

&&

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

&&

$$

07