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 092215 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 615 PM EDT WED JUL 9 2014 .SYNOPSIS... A WEAK COLD FRONT WILL EXIT THE REGION THIS EVENING...FOLLOWED BY BUILDING HIGH PRESSURE TO END THE WEEK. && .NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
-- Changed Discussion --
INSTABILITY HAS WANED SIGNIFICANTLY FROM THIS TIME YESTERDAY AS ONLY STRONG VERY LOW LEVEL LAPSE RATES REMAIN FOR THE ATMOSPHERE TO WORK WITH. ABOVE 750 MB...VERY WEAK LAPSE RATES SEEM TO RESULT IN UPDRAFTS BEING UNABLE TO MAINTAIN THEMSELVES OUTSIDE OF NORTHERN OHIO AS THEY ATTEMPT TO PUSH INTO WESTERN PENNSYLVANIA. AS SUCH...ONLY A SLIGHT CHANCE OF SHOWERS WAS CARRIED FOR THE EARLY EVENING...WITH DRY CONDITIONS AND CLEARING SKIES EXPECTED OVERNIGHT AS INVERSIONS SET UP. FRIES
-- End Changed Discussion --
&& .SHORT TERM /6 AM THURSDAY MORNING THROUGH SATURDAY/... SFC HIGH PRES WL BLD IN THRU FRI WITH NR OR SLGTLY BLO AVG TEMPS. A WK UPR TROF WL CROSS THE GT LKS THU...BUT ONLY AREA THAT MAY HAVE ENOUGH MOISTURE/SPPRT FOR LOW CHC POPS FOR SHWRS WL BE IN THE RIDGES SE OF PIT. THE HIGH WL SHIFT E SAT WITH SRLY FLOW AND WRMG TEMPS. && .LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/... SHOWER/STORM CHANCES WILL INCREASE SUNDAY/MONDAY WITH THE APPROACH AND PASSAGE OF A COLD FRONT. TEMPS AND HUMIDITY LEVELS WILL INCREASE ON THE EASTERN SIDE OF SURFACE BOUNDARY UNTIL WE COOL DOWN AND DRY OUT ON TUESDAY AND WEDNESDAY. && .AVIATION /22Z WEDNESDAY THROUGH MONDAY/... HIGH CONFIDENCE FOR THE DAYLIGHT HOURS OF VFR...MEDIUM CONFIDENCE IN IFR DUE TO PREDAWN FOG. VIS RESTRICTIONS COULD VARY BY AN HOUR OR TWO THAN WHAT IS FORECAST. SURFACE COLD FRONT CROSSES LATER THIS AFTERNOON. A LINE OF SHOWERS WITH ISOLATED THUNDER COULD DEVELOP...HOWEVER CONFIDENCE IS TOO LOW FOR INCLUSION OF ANY PCPN AT THE TERMINALS. WINDS WILL BE GUSTY FROM THE WSW...BUT WILL SUBSIDE WITH THE ONSET OF DUSK AROUND 0Z. HIGH PRESSURE BUILDS IN TONIGHT ALLOWING FOR CALM WINDS AND DEVELOPMENT OF FOG. ENOUGH CONFIDENCE FROM THE ENTIRE GUIDANCE SUITE TO INSERT IFR FG AT HISTORICALLY FAVORED LOCATIONS OF ZZV...MGW...HLG...AND FKL. KEPT THE REMAINING AIRPORTS AT MVFR OR BETTER DUE TO LACK OF A NEAR BY WATER SOURCE. ANY MORNING FOG WILL BURN OFF BETWEEN 13-14Z AND LEAVE VFR. .OUTLOOK.../THURSDAY THROUGH MONDAY/... RESTRICTIONS IN SHOWERS AND THUNDERSTORMS ARE POSSIBLE SUNDAY/MONDAY. && .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.