Area Forecast Discussion
Issued by NWS

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
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
-- Remove Highlighting --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KPBZ 262241 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 641 PM EDT SUN JUL 26 2015 .SYNOPSIS... A WEAK FRONT WILL BRING THE RISK FOR SHOWERS AND STORMS TODAY. DRY WEATHER RETURNS MONDAY AND TUESDAY. && .NEAR TERM /THROUGH MONDAY/... A COLD FRONT SAGGING INTO THE REGION HAS POOLED LARGELY 1000-1500 J/KG OF CAPE AHEAD OF IT IN A WEAK SHEAR ENVIRONMENT. THIS HAS ALLOWED FOR SLOW-MOVING CONVECTION THIS EVENING...PARTICULARLY OVER OHIO. RAINFALL RATES IN SOME OF THE STORMS HAVE BEEN IMPRESSIVE...HOWEVER AS THEY HAVE PERSISTED...THE COLD POOL UNDER THEM HAS MANAGED TO STRENGTHEN AND SPREAD SOUTHWARD. THIS IS NOW EFFECTIVELY MOVING THE CONVECTIVE INITIATION SOUTHWARD FINALLY...WHEREAS THE FRONT REALLY HAS FAILED TO DO. FOLLOWING THE EXPANDING COLD POOL...CONVECTION SHOULD START TO DISSIPATE NORTH OF I-70 WITHIN THE NEXT HOUR OR TWO...WHILE THE CHANCES OF SHOWERS AND THUNDERSTORMS WILL REMAIN FARTHER SOUTH UNTIL THE COLD POOL AND ATTENDANT COLD FRONT PUSH SOUTHWARD LATER TONIGHT. CLOUDS WILL REMAIN OVER THE AREA FOR MUCH OF THE EVENING AS CONVECTIVE DEBRIS LITTERS THE UPPER OHIO VALLEY. THIS WILL SLOW TEMPERATURE FALLS. SOME CLEARING WILL BE POSSIBLE LATER TONIGHT...BUT DEWPOINTS EVEN BEHIND THE FRONT FAIL TO FALL OFF IMPRESSIVELY. AS A RESULT...TEMPERATURE FALLS EVEN WITH CLEARING ARE UNLIKELY TO BE IMPRESSIVE. FRIES && .SHORT TERM /MONDAY NIGHT THROUGH WEDNESDAY/... CANNOT RULE OUT A LINGERING SHOWER ACROSS SOUTHEASTERN COUNTIES MONDAY NIGHT...BUT CONDITIONS SHOULD BE DRY BY MIDNIGHT. AS UPPER LEVEL RIDGE BUILDS INTO THE REGION TUESDAY AND WEDNESDAY...SUNNY SKIES ARE EXPECTED AS WELL AS RISING TEMPERATURES. HIGHS WILL BE NEAR 90 BOTH DAYS...WITH HEAT INDICES RISING INTO THE MID 90S ON WEDNESDAY AS SOUTHERLY WINDS BRING MORE MOISTURE INTO THE REGION. A COLD FRONT WILL APPROACH THE REGION WEDNESDAY...AND HAVE SLIGHTLY DELAYED TIMING OF THE PRECIPITATION DURING THE AFTERNOON. && .LONG TERM /WEDNESDAY NIGHT THROUGH SUNDAY/... MODELS COMING INTO FAIRLY GOOD AGREEMENT ON UPPER LEVEL RIDGE SHIFTING WEST TOWARD THE SOUTHERN ROCKIES LATE WEEK WITH DRIER AND COOLER NORTHWEST FLOW DEVELOPING ACROSS THE EASTERN STATES. COLD FRONT WILL APPROACH WEDNESDAY NIGHT AND CROSS THE RIDGES BY THURSDAY EVENING. WENT WITH HIGHER CHANCE POPS FOR FROPA. LESS HUMID WITH SEASONAL TEMPERATURES FRIDAY INTO SATURDAY. && .AVIATION /00Z MONDAY THROUGH FRIDAY/... SHOWERS AND THUNDERSTORMS HAVE BEEN DIMINISHING ALONG THE WEAK FRONTAL BOUNDARY THIS EVENING AND THUS VFR CONDITIONS WILL PERSIST THROUGH EARLY TONIGHT. TERMINALS THAT RECEIVED RAINFALL TODAY ARE EXPECTED TO DETERIORATE TO IFR CONDITIONS BY PRE-DAWN WHILE FOG DEVELOPS ACROSS THESE SITES. CATEGORIES WILL GRADUALLY IMPROVE TO VFR THROUGH THE LATE MORNING. OUTLOOK...MONDAY NIGHT THROUGH FRIDAY... RESTRICTIONS ARE POSSIBLE WITH A WEDNESDAY NIGHT AND THURSDAY COLD FRONT. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. && $$

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