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 011134 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 734 AM EDT TUE SEP 1 2015 .SYNOPSIS... WARM AND HUMID CONDITIONS WILL CONTINUE THROUGH THE WEEK WITH ISOLATED DAYTIME SHOWERS AND THUNDERSTORMS POSSIBLE. && .NEAR TERM /THROUGH TONIGHT/... NO MAJOR ALTERATIONS WERE NEEDED FOR THE POST DAWN UPDATE. A WEAK UPPER TROUGH CONTINUES TO RESIDE ESSENTIALLY OVER THE OHIO VALLEY AS AN AMPLIFYING BUILDS OVER THE CENTRAL GREAT LAKES. AS THIS UPPER RIDGE CONTINUES TO AMPLIFY OVER THE NEXT 24 HOURS...THE UPPER TROUGH WILL GRADUALLY WEAKEN AND LOSE DEFINITION AS THE BASE OF IT TRANSITS THE SOUTHERN FRINGE OF THE CWA. THOUGH AMPLE SURFACE BASED INSTABILITY RESIDES OVER THE REGION...WARM MID LEVELS WILL INHIBIT MOIST...DEEP CONVECTION. THE BULK OF THE AREA WILL THUS REMAIN DRY...THOUGH SOME LOW END POPS WERE CARRIED ALONG THE RIDGES AS PER LIGHT OROGRAPIC SUPPORT WITH SLIGHT NUMBERS UNDER THE WEAKENING UPPER WAVE IN OHIO. WARM TEMPERATURES WERE FORECAST VIA PERSISTENCE. && .SHORT TERM /WEDNESDAY THROUGH FRIDAY/... WEAK CUT-OFF UPPER-LEVEL LOW CURRENTLY OVER ILLINOIS WILL FINALLY DISLODGE AND DRIFT SLOWLY EASTWARD EVENTUALLY GETTING ABSORBED BACK INTO THE LARGE SCALE FLOW PATTERN. AS THE LOW OPENS AND CROSSES THE FORECAST AREA WEDNESDAY...SHOWER CHANCES SHOULD INCREASE. ALTHOUGH THE BROAD UPPER-RIDGE REMAINS...DIURNALLY SUPPORTED PRECIP CHANCES ARE ANTICIPATED THROUGH THE LATTER PART OF THE WEEK. THE FORECAST POSITION OF THE SURFACE LOW WILL BE CONDUCIVE TO MOISTURE ADVECTION ON FRIDAY. HAVE THUS RAISED POPS...ESPECIALLY OVER THE HIGHER TERRAIN. WITH THE OVERALL PATTERN PERSISTING...ONLY MINOR TWEAKS WERE MADE TO THE ONGOING WARM TEMPERATURE FORECAST. && .LONG TERM /FRIDAY NIGHT THROUGH MONDAY/... STOUT UPPER-RIDGE IS PROGGED TO BUILD EASTWARD AS LOW PRESSURE MOVES OUT OF THE NORTHWEST. THAT RIDGE SHOULD SUPPORT DRY AND WARM WEATHER UNTIL THE APPROACH OF THE COLD FRONT DURING MID WEEK. && .AVIATION /11Z TUESDAY THROUGH SATURDAY/... SOME MVFR FOG AROUND MOST SITES AND LOCAL IFR AROUND KFKL AND KDUJ FOG IS EVIDENT EARLY THIS MORNING. ALL OF IT SHOULD DISSIPATE BY AROUND 14Z...WITH VFR CONDITIONS AT ALL SITES THEREAFTER. LIGHT WIND WILL BE PRESENT OVER ALL SITES. OUTLOOK...WEDNESDAY NIGHT THROUGH SATURDAY... BRIEF RESTRICTIONS ARE EXPECTED WITH PERIDAWN FOG AND ISOLATED CONVECTION. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. && $$ 15

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