Area Forecast Discussion
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000 FXUS61 KPBZ 282132 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 532 PM EDT MON JUL 28 2014 .SYNOPSIS... A SERIES OF DISTURBANCES IN COOL NORTHWEST FLOW WILL BRING SHOWER CHANCES THROUGH THE MIDDLE OF THE WEEK. && .NEAR TERM /THROUGH TUESDAY/...
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THE GOING FORECAST HAS BEEN TWEAKED MAINLY TO HOLD ONTO ISOLATED SHOWERS ALONG I-80 A TAD LONGER OWING TO LINGERING DIURNAL INSTABILITY DRIVING A HANDFUL OF CURRENT RADAR ECHOES. OTHERWISE...NOT MUCH HAS BEEN CHANGED FOR THE REST OF THE NIGHT AS THE SHORT WAVE THAT WAS RESPONSIBLE FOR THE MORE NUMEROUS SHOWERS THIS AFTERNOON EXITS TO THE SOUTHEAST. THE TEXT PRODUCTS HAVE BEEN UPDATED TO REMOVE EARLY EVENING WORDING AND TO ALLOW FOR THE TREND DOWN TO JUST SCATTERED SHOWERS TO THE EAST AND SOUTH OF PITTSBURGH. FRIES PREVIOUS DISCUSSION FOR OVERNIGHT/TUESDAY FOLLOWS...AFTER CURRENT SHORTWAVE PASSES EAST THIS EVENING LEFTOVER UPSLOPE SHOWERS WILL END IN THE RIDGES. THEN A QUITE COOL OVERNIGHT WITH RECORD LOWS BEING CHALLENGED ACROSS THE REGION. THE RECORD LOW IN PITTSBURGH FOR JULY 29TH IS 52 SET IN 1982. MAINLY DIURNAL SHOWERS ACROSS THE I-80 CORRIDOR TUESDAY IN NORTHWEST FLOW WITH COLD AIR ALOFT. TEMPERATURES TUESDAY ONCE AGAIN MORE THAN 10 DEGREES BELOW NORMAL.
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&& .SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY/... LITTLE CHANGE TO THE PATTERN THROUGH THURSDAY AS LOOKS LIKE OCTOBER IN JULY WITH DEEP CLOSED LOW ACROSS EASTERN CANADA NEARLY STATIONARY WITH SHORTWAVES ROTATING UNDERNEATH IT. BEST SHOWER CHANCES WEDNESDAY AS STRONGER PIECE OF ENERGY DIVES SOUTHEAST. BULK OF SHOWERS THURSDAY SHOULD BE DIURNAL AND CONFINED TO THE I-80 CORRIDOR CLOSER TO LAKE MOISTURE AND COLDER TEMPERATURES ALOFT. TEMPERATURES WILL CONTINUE TO AVERAGE NEAR 10 DEGREES BELOW NORMAL. && .LONG TERM /THURSDAY NIGHT THROUGH MONDAY/... AN UPR TROF WL SET UP ACRS THE ERN CONUS THRU THE LONG TERM PD. SVRL WK SHRTWVS WL ROUND THE BASE OF THE TROF...BUT WITH LMTD AVAIL DEEP MOISTURE EXP MAINLY DIURNAL LOW CHCS FOR SHWRS EACH DAY. TEMPS WL AVG NR OR JUST BLO SEASONAL LVLS. && .AVIATION /22Z MONDAY THROUGH SATURDAY/... ADVNG ERN GT LKS LOW PRES WL WDSPRD BRING MVFR SC AND A NMRS SHWRS TO THE RGN THRU THIS AFTN...ALG WITH GUSTY W-NW WNDS. LINGERING VFR SC/DIURNAL CU IS EXPD AFT THE PASSAGE OF THE LOW TNGT INTO TUE. OUTLOOK.../TUESDAY NIGHT THROUGH SATURDAY/... NO WDSPRD RSTRNS EXPD. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. && $$

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