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 260030 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 830 PM EDT SAT OCT 25 2014 .SYNOPSIS... AFTER A SLIGHT COOL DOWN FOR SUNDAY...TEMPERATURES WILL WARM WELL ABOVE NORMAL MONDAY AND TUESDAY. A COLD FRONT TUESDAY NIGHT WILL BRING RAIN AND A RETURN TO COLDER TEMPERATURES. && .NEAR TERM /THROUGH SUNDAY/...
-- Changed Discussion --
DEWPOINTS IN THE 30S ARE NOW COMING INTO A GOOD CHUNK OF THE NORTHWESTERN HALF OF OHIO...AND POISED TO PUSH INTO OUR AREA OVERNIGHT. GUSTY SOUTHWEST WINDS WILL BE REPLACED BY FAIRLY BRISK OVERNIGHT NORTHWEST WINDS...WHICH WILL USHER IN SOMEWHAT COLDER...BUT MUCH DRIER AIR THROUGH MORNING. INCREASED TURBULENT MIXING SHOULD KEEP DEWPOINT DEPRESSIONS UP OVERNIGHT AND A LACK OF LAYER RH SHOULD ALLOW FOR CLEARING TO BE ALL ENCOMPASSING IN THE NEXT FEW HOURS. AS SUCH...CLEAR SKIES WITH NO FOG WILL BE THE RULE BY SUN RISE. CLEAR SKIES WITH STRONG DEWPOINT DEPRESSIONS SHOULD CONTINUE THROUGH SUNDAY. A HANDFUL OF FAIR WEATHER/FLAT CUMULUS WILL BE POSSIBLE ACROSS THE NORTHERN TIER OF THE FORECAST AREA IN THE AFTERNOON AS THE MID-LEVEL COLD POOL DRIFTS FROM UPSTATE NEW YORK INTO NEW ENGLAND. FRIES
-- End Changed Discussion --
&& .SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY/... HIGH PRESSURE ALONG THE EAST COAST WILL BRING FLOW WITH A SOUTHERLY COMPONENT...ALLOWING FOR TEMPERATURE TO RISE ABOVE NORMAL. NEARLY ALL LOCATIONS ARE EXPECTED TO REACH THE 70S ON TUESDAY AHEAD OF AN ADVANCING COLD FRONT. HAVE SPED UP ARRIVAL TIME OF PRECIP...AND HAVE NOW BROUGHT IN A CHANCE OF RAIN EVERYWHERE BY LATE TUESDAY AFTERNOON. 12Z GFS AND NAM BOTH SHOW SMALL AMOUNTS OF INSTABILITY IN ZANESVILLE SOUNDING...AND HAVE ALSO ADDED A SLIGHT CHANCE OF THUNDER FOR PORTIONS OF OHIO. && .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/... COLD FRONT WILL RACE ACROSS REGION TUESDAY NIGHT AND HAVE GONE WITH LIKELY POPS FOR SHOWERS WITH FRO PA AND UPPER LEVEL TROUGH. FAIRLY QUIET WEATHER FOR WEDNESDAY AND THURSDAY WITH WEAK SURFACE RIDGE STRETCHED ACROSS THE UPPER OHIO VALLEY. BY FRIDAY DEEPENING UPPER LEVEL SYSTEM AND DEVELOPING SURFACE LOW PRESSURE WILL BRING SHOWERS BACK TO THE REGION FOLLOWED BY MUCH COOLER CONDITIONS FOR THE START OF NEXT WEEKEND. && .AVIATION /01Z SUNDAY THROUGH THURSDAY/... GUSTY SOUTHWESTERLY WINDS WILL CONTINUE UNTIL MID EVENING BEFORE DECOUPLING AFTER FRONTAL PASSAGE TONIGHT. THERE IS SOME UNCERTAINTY IN HOW SOON WINDS WILL LESSEN AT THE SURFACE BUT FOR NOW REFLECT THIS OCCURRING SHORTLY AFTER MIDNIGHT AT MOST LOCATIONS. IF WINDS DECOUPLE EARLIER...LOW LEVEL IND SHEAR WILL BE A CONCERN AS LATEST RAP SOUNDINGS SHOW 40KTS AT 1KFT AGL BY MID EVENING. REMOVED MVFR CIGS FROM 18Z TAFS AS MUCH DRIER AIR WILL BE MOVING IN BEHIND THE COLD FRONT. MODELS ARE ALL IN VERY GOOD AGREEMENT SHOWING LIMITED LOW LEVEL MOISTURE...AND MODEL SOUNDINGS SHOW A LARGE ENOUGH MARGIN BETWEEN TEMPERATURE AND DEWPOINT PROFILES DESPITE THE COLD AIR ADVECTION BEHIND THE FRONT. OUTLOOK.../SUNDAY THROUGH THURSDAY/... VFR CONDITIONS ARE EXPECTED TO PERSIST THROUGH EARLY NEXT WEEK. && .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.