Area Forecast Discussion
Issued by NWS

Current Version | Previous Version | Graphics & Text | Print | Product List | Glossary Off
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
-- Highlight Changed Discussion --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KPBZ 251628 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 1228 PM EDT FRI JUL 25 2014 .SYNOPSIS... SHOWER AND THUNDERSTORM CHANCES ARE RETURNING FOR THE WEEKEND. COLDER WEATHER CAN BE EXPECTED NEXT WEEK. && .NEAR TERM /THROUGH TONIGHT/...
-- Changed Discussion --
EWD RETREATING SFC HIGH UNDER WNW FLOW ALOFT WL KP THE AREA DRY AND THROUGH TNGT. SHRTWV IN THAT FLOW WL INCRS CLD COVER AND MAY SPAWN SOME SPRINKLES IN THE PERI DAWN HRS...BUT MEASURABLE PCPN CHC IS MINIMAL...AND CONFINED TO THE NRN ZONES. THE COOL NR TERM TEMPS WERE FORECAST NR SREF MEANS.
-- End Changed Discussion --
&& .SHORT TERM /SATURDAY THROUGH MONDAY/...
-- Changed Discussion --
SHWR AND TSTM CHCS WL INCRS THIS WEEKEND AS A SERIES OF SHRTWVS MOV OUT OF THE GREAT LAKES REGION. SFC FRONTAL PLACEMENT UNDR INCRSG BUT MORE ZONAL FLOW WL BE CRITICAL FOR UPR OH VALLEY SVR POTENTIAL. AT MOMENT...THE INITIAL SVR CHC...ALBEIT SLGT...RESIDES WITH PASSAGE OF A POTENTIAL MCS OR REMNANTS LATE SATURDAY OR EARLY SUNDAY. BY SUNDAY...A TRAILING...AND MORE POTENT SHRTWV IS PROGGED OFF THE GREAT LAKES. INCRSD DEEP LYR SHEAR AND STEEPENING MID LVL LAPSE RATES WITH THAT FEATURE WL BE PLENTY SUFFICIENT FOR AN ARRAY OF SEVERE WEATHER...BUT LIMITATIONS ARISE IN ACTUAL INSTABILITY PARAMETERS AND BNDRY PLACEMENT...ESPECIALLY IN RELATION TO OUTFLOW REINFORCEMENT FM THE SATURDAY SYSTEM. AT ANY RATE...THE STORM PREDICTION CENTER HAS HIGHLIGHTED THE REGION WITH THESE POSSIBILITIES AND LCL MENTION HAS BEEN CONTINUED IN THE HAZARDOUS WEATHER OUTLOOK.
-- End Changed Discussion --
&& .LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
-- Changed Discussion --
THE LONG TERM WL FEATURE AN ERN CONUS UPR TROF PERSISTING THRU THE PD WITH BLO AVG TEMPS. SFC RIDGING WL BLD IN UNDER THE TROF BY MID WK...KEEPING ONLY UNMENTIONABLE SLGT CHCS FOR SHWRS IN THE FCST. THE RIDGING IS EXPD TO WKN BY LT WK WITH BETTER CHCS FOR SHWRS/TSTMS.
-- End Changed Discussion --
&& .AVIATION /18Z FRIDAY THROUGH WEDNESDAY/...
-- Changed Discussion --
DRY SFC HIGH PRES WL MAINTAIN VFR CONDS THRU TNGT. A WK DISTURBANCE WL CROSS THE RGN SAT. VFR SC/CU WL INCR...THOUGH SHWR/TSTM CHCS APPEAR TOO LOW FOR A TAF MENTION ATTM. OUTLOOK.../SATURDAY NIGHT THROUGH WEDNESDAY/... ADVNG LOW PRES WL LIKELY BRING SHWR/TSTM RSTRNS LT SAT NGT AND SUN. RSTRNS ARE PSBL MON AS THE LOW/S ASSOCIATED CDFNT CROSSES.
-- End Changed Discussion --
&& .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. && $$ 15/07

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.