Severe Thunderstorm Warning 209, NWS Pittsburgh, PA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PITTSBURGH PA
243 PM EDT WED AUG 7 2013

.SYNOPSIS...
UNSETTLED WEATHER WILL CONTINUE THE REST OF THE WEEK AS A SLOW
MOVING COLD FRONT CROSSES THE REGION.

&&

.NEAR TERM /THROUGH TONIGHT/...
SHWRS/TSTMS CONT TO DVLP AND MOVE ALG AN OLD OUTFLOW BNDRY ACRS
OH. INSTBY CHARTS AND RECENT MESO DATA SHOW MARGINAL CONDS FOR SVR
WEA N OF PIT. THREAT HAS BEEN LOCALIZED TO CELL MERGERS SO FAR IN
OH. BEST SHEAR SHOULD REMAIN ACRS FAR NRN PA AND SRN ONTARIO. WL
MONITOR ANY TRAINING WITH LCLY HVY RAINFALL AS WELL. ELSW...SCT
TSTMS HAVE DVLPD IN A PUSH OF MOIST AIR ACRS OH AND WV. EXP THIS
GENERAL SCENARIO TO CONT THIS EVE UNTIL CNVCTN BEGINS TO DMNSH AFT
SUNSET.

&&

.SHORT TERM /THURSDAY THROUGH FRIDAY/...
A CDFNT WL MOV S INTO THE AREA THU AND THU NGT AS ANOTHER SHRTWV
MOVS ACRS THE OH VLY. BROUGHT IN LIKELY POPS FM S TO N LT THU AND
THU NGT. INSTBY IS SOMEWHAT LMTD BUT PLENTY OF MOISTURE SHOULD
ALLOW FOR SHWRS AND PSBL TSTMS. WL MONITOR HEAVY RAINFALL
POTENTIAL BUT ATTM NO FOCUSED AREA FOR A WDSPRD FLOOD THREAT. THE
FNT WL CONT TO DRIFT SWD FRI INTO CNTRL/SRN PA AND OH. THE SHRTWV
WL EXIT FRI MRNG BUT ANOTHER IS EXPD TO MOVE IN LATE FRI WITH
ADDNL SHWRS/TSTMS. WARM AND HUMID CONDS WL CONT THRU THE PD.

&&

.LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/...
THE CDFNT SHOULD SHIFT SWD SAT NGT AS A SECONDARY TROF/CDFNT DROPS
S ACRS THE GT LKS. THESE SYSTEMS SHOULD MOVE OUT OF THE AREA BY
SUN WITH BLDG HIGH PRES INTO ERLY NXT WK. TEMPS SHOULD AVG A
LITTLE BLO SEASONAL LVLS.

&&

.AVIATION /18Z WEDNESDAY THROUGH MONDAY/...
GENL VFR CAN BE EXPECTED FOR MUCH OF THE DAY...BUT DEGRADATION IS
FORECAST LTR THIS AFTN AS A CDFNT MOVG ACRS THE GREAT LAKES WL LIKELY
DVLP SOME SHWRS AND TSTMS OVR THE UPR OH REGION.

HAVE THUS INCLUDED A VCTS FOR PORTS FM BVI NWD AND VCSH ELSEWHERE...BUT
HAVE OPTED OUT OF AN OVRNGT MENTION AS MDLS INDICATE WANING SHRTWV SPPRT
TO ACCOMPANY THE EVENING STABILIZATION. OTHERWISE...WITH ABUNDANT LLVL
MSTR...AND CONTD ASCENT VIA APPRCHG FRONT...RESTRICTIONS FM CIGS AND
VSBY ARE ANTICIPATED. INTIAL PROGNOSIS WL BE OF MVFR...BUT FUTURE AMENDMENTS
MAY BE MORE PESSIMISTIC.

OUTLOOK.../THURSDAY THROUGH MONDAY/...
SOME RESTRICTIONS ARE ANTICIPATED FM MRNG CIGS AND FOG...IN ADDITION
TO SHWRS AND TSTMS ON THU AND FRI. GENL VFR IS EXPECTED WITH WEEKEND
HIGH PRES...ALTHOUGH MRNG RESTRICTIONS MAY LINGER OVR SRN PORTS DUE
TO FRONTAL VICINITY.

&&

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

&&

07/15

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SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
259 PM EDT WED AUG 7 2013

PAZ007-008-014-015-072000-
BUTLER PA-CLARION PA-MERCER PA-VENANGO PA-
259 PM EDT WED AUG 7 2013

...STRONG THUNDERSTORMS WILL AFFECT EASTERN MERCER...EXTREME
NORTHEASTERN BUTLER...VENANGO AND WEST CENTRAL CLARION COUNTIES...

AT 257 PM EDT...STRONG THUNDERSTORMS WERE ALONG A LINE FROM 6 MILES
NORTHWEST OF MAURICE K GODDARD STATE PARK TO 2 MILES SOUTH OF
HARLANSBURG.  THESE STORMS ARE NEARLY STATIONARY.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS.

  LOCATIONS IMPACTED INCLUDE...
  MERCER...             VAN...                SUGARCREEK...
  STONEBORO...          SENECA...             POLK...
  OIL CITY...           MAURICE K GODDARD STATE PARK...
  KENNERDELL...         FRANKLIN...           EMLENTON...
  COOPERSTOWN...

PLEASE REPORT SIGNIFICANT WEATHER BY CALLING...412-262-1988...POSTING
TO THE NWS PITTSBURGH FACEBOOK PAGE...OR USING TWITTER
@NWSPITTSBURGH.

LAT...LON 4149 7954 4129 7954 4116 7962 4115 7968
      4117 7969 4115 7970 4114 7974 4117 8043
      4135 8022 4149 8023 4150 8001 4153 7996

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
304 PM EDT WED AUG 7 2013

PAZ007-013-072000-
LAWRENCE PA-MERCER PA-
304 PM EDT WED AUG 7 2013

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL LAWRENCE AND EXTREME
SOUTHEASTERN MERCER COUNTIES...

AT 301 PM EDT...A STRONG THUNDERSTORM WAS LOCATED 4 MILES SOUTHEAST
OF YOUNGSTOWN...MOVING EAST AT 35 MPH.

WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS STORM.

  LOCATIONS IMPACTED INCLUDE...
  BESSEMER...           NEW CASTLE...         HARLANSBURG...
  MCCONNELLS MILL...

PLEASE REPORT SIGNIFICANT WEATHER BY CALLING...412-262-1988...POSTING
TO THE NWS PITTSBURGH FACEBOOK PAGE...OR USING TWITTER
@NWSPITTSBURGH.

LAT...LON 4108 8009 4100 8017 4098 8016 4089 8016
      4095 8053 4110 8053 4111 8052