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
-- Remove Highlighting --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KPBZ 271141 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 741 AM EDT THU AUG 27 2015 .SYNOPSIS... UNSEASONABLY COOL WEATHER WILL END BY THE END OF THE WEEK AS HIGH PRESSURE BUILDS THROUGH SATURDAY. RAIN CHANCES RETURN ON SUNDAY WITH A COLD FRONT. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... THE PERSISTENT CLOSED UPPER LOW...OVER THE QUEBEC PROVINCE...IS PROGGED TO DRIFT NORTHEASTWARD TOWARD THE NEWFOUNDLAND AND LABRADOR PROVINCES TODAY. A WEAK SHORTWAVE TROUGH CROSSINGS THE REGION WILL HELP KEEP A STRATOCUMULUS DECK THROUGH MUCH OF THE AREA AND SUSTAIN TEMPERATURES BELOW NORMAL. && .SHORT TERM /6 PM THIS EVENING THROUGH SATURDAY/... UPPER LEVEL HEIGHTS FINALLY BEGIN TO RISE ON FRIDAY AND BROAD SURFACE HIGH PRESSURE WILL SETTLE IN OVER THE REGION. THIS WILL ALLOW FOR A RETURN OF SUNSHINE AND MODERATING TEMPERATURES. UPPER LEVEL RIDGE WILL REMAIN IN PLACE THROUGH THE FIRST HALF OF SATURDAY AND SURFACE HIGH WILL MOVE OFF THE EASTERN SEABOARD. FLOW ON BACK SIDE OF EXITING HIGH WILL PROMOTE AN INCREASE IN TEMPERATURES AND HUMIDITY LEVELS. A WEAK SHORTWAVE...THAT WILL SLOWLY FLATTEN THE UPPER LEVEL RIDGE...MAY PROVIDE ENOUGH LARGE SCALE ASCENSION TO SPARK SCATTERED CONVECTION OVER THE WEST LATE SATURDAY. TEMPERATURES RETURN TO MORE SEASONABLE LEVELS ON SATURDAY. && .LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/... MODEL GUIDANCE IS IN RELATIVELY GOOD AGREEMENT WITH THE FILLING OF THE EASTERN CONUS UPPER TROUGH AND A SHORTWAVE APPROACH THIS WEEKEND. THIS WILL SUPPORT A TEMPERATURE MODERATION TO...THEN ABOVE THE AVERAGES...ALTHOUGH INCREASED MOISTURE IN THE DEVELOPING SOUTHWEST FLOW COULD LEAD TO DIURNAL SHOWERS AND THUNDERSTORMS SATURDAY NIGHT AND SUNDAY. SURFACE HIGH PRESSURE RETURNS NEXT WEEK. && .AVIATION /12Z THURSDAY THROUGH MONDAY/... GENL VFR CAN BE EXPECTED BY MID MORNING...THE EXCEPTION BEING FKL WHERE SOME MVFR STRATOCU MAY PERSIST INTO MIDDAY DUE TO A BOUNDARY LAYER MOISTURE SWATH IN LEE OF THE LAKES. BUILDING HIGH PRESSURE SHOULD SUPPRESS CLOUDINESS FOR TONIGHT...HENCE PREDAWN FOG MAY BE MORE OF AN ISSUE ON FRIDAY MORNING WITH LOCAL IFR ANTICIPATED. OUTLOOK...THURSDAY THROUGH SUNDAY... NO EXTENSIVE IFR IS EXPECTED THROUGH THE WEEKEND. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. && $$ 15/24

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