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 161920 AFDPBZ AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 320 PM EDT THU APR 16 2015 .SYNOPSIS... A WEAK UPPER LEVEL DISTURBANCE AND TRAILING COLD FRONT WILL BRING SHOWERS THIS AFTERNOON INTO FRIDAY MORNING. HIGH PRESSURE WILL BRING A DRY START TO THE WEEKEND. && .NEAR TERM /THROUGH FRIDAY/...
-- Changed Discussion --
AREA OF SHOWERS ACROSS MUCH OF THE REGION AND WILL CONTINUE TO MOVE AND DEVELOP NORTHEAST INTO THE EVENING. UPPER LEVEL TROUGH MOVING INTO THE UPPER OHIO VALLEY THIS EVENING WILL KEEP SHOWER CHANCES IN THE LIKELY CATEGORY UNTIL LATER TONIGHT WHEN TROUGH BEGINS TO SHEAR OUT AND A WEAK BOUNDARY APPROACHES FROM THE GREAT LAKES. SHOWERS WILL DIMINISH FROM WEST TO EAST OVERNIGHT AS DEEP MOISTURE IS TAKEN EAST OF THE RIDGES. TEMPERATURES TONIGHT WILL NOT MOVE MUCH FROM CURRENT READINGS WHERE RAIN HAS FALLEN. FOR FRIDAY BOUNDARY WILL BE EXITING EAST TAKING LEFTOVER SHOWERS WITH IT. WEAK HIGH PRESSURE WILL THEN BEGIN TO BREAK OUT CLOUDS FOR THE AFTERNOON. NOT MUCH IN THE WAY OF COOLING BEHIND FRONT WITH MAX TEMPS MID 60S NORTH TO LOWER 70S SOUTH.
-- End Changed Discussion --
&& .SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/...
-- Changed Discussion --
ON SATURDAY HIGH PRESSURE WILL NOSE SOUTH FROM CANADA WITH A WEAK AND MOISTURE STARVED BACK DOOR FRONT PUSHING ACROSS REGION. HAVE GONE BELOW GUIDANCE FOR MAX TEMPS AS DESPITE SUNSHINE EXPECT COOL ADVECTION ON NORTH TO NORTHEAST WINDS. DRY AND SEASONAL SATURDAY NIGHT. NEXT SYSTEM WILL ARRIVE SUNDAY AS A DEEP UPPER LEVEL TROUGH MOVES INTO THE NATIONS MID SECTION. LEAD SHORTWAVE WILL BRING INCREASING MOISTURE AND LIFT BY SUNDAY AFTERNOON WITH SHOWERS DEVELOPING SOUTHWEST TO NORTHEAST ACROSS THE REGION IN WARM ADVECTION.
-- End Changed Discussion --
&& .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
-- Changed Discussion --
MODELS STILL SHOWING A LARGE AND SLOW MOVING SYSTEM THAT WILL BRING AN EXTENDED PERIOD OF SHOWERS SUNDAY NIGHT AND CONTINUING INTO EARLY TUESDAY. DRY AND SEASONABLE WEATHER WILL RETURN BEHIND THIS SYSTEM.
-- End Changed Discussion --
&& .AVIATION /19Z THURSDAY THROUGH TUESDAY/...
-- Changed Discussion --
SHOWERS WILL CONTINUE TO BLOSSOM WITH HELP FROM A PASSING SHORTWAVE THROUGH THIS AFTERNOON AND EVENING. A GRADUAL DETERIORATION TO MVFR AND IFR CIGS IS EXPECTED OVERNIGHT AT MOST PORTS AS THE WEAK FRONTAL BOUNDARY CROSSES. TRIED TO FOLLOW THE SREF PROBABILITIES AND BUFKIT MOISTURE PROFILES WITH TIMING OF RESTRICTIONS...AS THE NAM AND LAMP SEEM TO BE A BUT MORE PESSIMISTIC AT THIS TIME. WHILE VERY BRIEF IFR VISIBILITY MAY BE EXPECTED IN THE MORE INTENSE SHOWERS...OPTED TO NOT CARRY THIS AT ANY PARTICULAR SITE AND WILL COVER WITH TEMPOS AS NEEDED. A ESE TO WSW WIND SHIFT IS ANTICIPATED OVERNIGHT. GRADUAL IMPROVEMENT BACK TO MVFR WILL OCCUR TOMORROW. .OUTLOOK.../FRIDAY NIGHT THROUGH TUESDAY/... THE NEXT CHANCE FOR GENERAL RESTRICTIONS IS EXPECTED WITH THE APPROACH OF LOW PRESSURE ON SUNDAY.
-- 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.