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 281023 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 623 AM EDT TUE JUL 28 2015 .SYNOPSIS... WARM WEATHER WILL CONTINUE UNTIL A COLD FRONT PASSES ON THURSDAY MORNING. && .NEAR TERM /THROUGH TONIGHT/...
-- Changed Discussion --
NO MAJOR CHANGES FOR THE DAWN UPDATE. PREVIOUS...AN AMPLIFYING UPPER RIDGE...IN RESPONSE TO NORTHERN PLAINS TROUGHING...IS EXPECTED TO SUPPRESS PRECIP OVER THE UPPER OHIO VALLEY REGION TODAY...WHILE THE RISING HEIGHTS WILL SUPPORT NEAR TERM TEMPS ABOUT 5 TO 10 DEGREES ABOVE THE AVERAGES. NO APPRECIABLE CHANGES WERE NEEDED TO THE ONGOING FORECAST.
-- End Changed Discussion --
&& .SHORT TERM /WEDNESDAY THROUGH FRIDAY/... THE SHORT TERM PERIOD WILL FEATURE THE APPROACH AND PASSAGE OF A COLD FRONT...CURRENTLY SLATED FOR A WEDNESDAY NIGHT/THURSDAY SWEEP OF THE REGION. ANOTHER WARM WEDNESDAY SHOULD BE EXPECTED BEFORE THE RELIEF ARRIVES WITH HIGHS AROUND THE 90 MARK AND HEAT INDICES IN THE MID 90S. AS FOR PRECIP WITH THE FRONT...NIGHT TIMING AND VERY WARM MID LEVEL TEMPERATURES...-4 TO -5 C AT 500 MB AS PER GFS AND NAM...WILL LIMIT INSTABILITY AND EXPLOSIVENESS...WHILE LITTLE FORCING FOR ASCENT IS INDICATED EITHER. PRECIP PROBABILITIES IN THE CHANCE/SCATTERED CATEGORY WILL THUS SUFFICE FOR NOW. SFC HIGH PRESSURE THAT IS PROJECTED TO BUILD IN THE WAKE OF THE FRONT WITH WEAK TROUGHING ALOFT WILL RESULT IN A DRY CLOSE TO THE SHORT TERM PERIOD WITH NEAR AVERAGE TEMPS. && .LONG TERM /FRIDAY NIGHT THROUGH MONDAY/... SURFACE RIDGING UNDER A BROAD EASTERN CONUS UPPER TROUGH SHOULD KEEP MAINLY DRY AND SEASONALLY WARM WEATHER THROUGH THE WEEKEND...THOUGH INCLUDED UNMENTIONABLE SLIGHT CHANCE POPS SATURDAY AS A WEAKENING SHORTWAVE CROSSES. A STRONGER SHORTWAVE IS PROGGED FOR EARLY NEXT WEEK WITH BETTER CHANCES FOR RAIN. FOLLOWED CLOSE TO THE ENSEMBLE BASED WPC GUIDANCE TO SMOOTH OUT INDIVIDUAL MODEL DIFFERENCES THROUGH THE PERIOD. && .AVIATION /12Z TUESDAY THROUGH SATURDAY/...
-- Changed Discussion --
WITH THE EXCEPTION OF EARLY MORNING PATCHY MVFR FOG...VFR CONDITIONS WITH DIURNAL CU AND LIGHT WINDS ARE EXPECTED THROUGH TONIGHT UNDER WEAK SURFACE RIDGING. OUTLOOK...WEDNESDAY THROUGH SATURDAY... RESTRICTIONS ARE POSSIBLE WITH A LATE WEDNESDAY/EARLY THURSDAY COLD FRONT.
-- End Changed Discussion --
&& .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.