Area Forecast Discussion
Issued by NWS State College, PA

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
-- Remove Highlighting --
-- Discussion containing changed information from previous version are highlighted. --
000 FXUS61 KCTP 290557 AFDCTP AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 157 AM EDT WED JUL 29 2015 .SYNOPSIS... SUMMERTIME HEAT AND HUMIDITY WILL BE THE MAIN WEATHER STORY IN CENTRAL PENNSYLVANIA INTO THURSDAY. A WELL-DEFINED COLD FRONT WILL MOVE ACROSS THE APPALACHIANS AND MID-ATLANTIC STATES ON THURSDAY. SEASONABLY WARM AND MAINLY DRY WEATHER WILL CLOSE OUT JULY 2015 AND CONTINUE INTO THE FIRST WEEKEND IN AUGUST. && .NEAR TERM /UNTIL 6 AM THIS MORNING/... VERY QUIET EVENING WITH WEAK 1016 MB HIGH PRESSURE CENTERED OVERHEAD AND MOSTLY CLEAR SKIES. SHORTWAVE RIDING INTO THE UPPER RIDGE AXIS OVER THE CENTRAL AND EASTERN GLAKS WILL PROVIDE SCATTERED COVERAGE OF CIRRUS STREAMING FROM NORTH TO SOUTH ACROSS THE AREA. EXPECT LATE NIGHT AND EARLY MORNING VALLEY FOG TO ONCE AGAIN FORM AND BECOME LOCALLY THICK OVER THE NORTH...BUT WITH LOWER DEWPOINTS THAN TUE MORNING...ANTICIPATE SLIGHTLY LESS COVERAGE THAN EARLY TUESDAY. && .SHORT TERM /6 AM THIS MORNING THROUGH 6 PM THURSDAY/... HIGH PRESSURE WILL BE DIRECTLY OVERHEAD BUT DEWPOINTS DO NOT DRY OUT ALL THAT MUCH FROM TUES. TEMPS WILL BE THE STORY FOR WED...AS MAXES WILL LIKELY EXCEED 90F IN THE VALLEYS OF THE EAST AND FAR SOUTH. HOWEVER...THE ELEVATIONS AND MORE-SHALLOW MIXING THERE SHOULD KEEP THE MAXES BARELY BELOW 90F OVER THE REST OF THE AREA. THE HIGHEST ELEVS IN THE LAURELS ARE THE PLACE TO GO IN PA TO BEST AVOID THE HEAT. WITH THE DEWPOINTS HOLDING IN THE 60S AND U50S WE SHOULD KEEP FROM GOING INTO HEAT ADVY VALUES. && .LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/... A COLD FRONT WILL APPROACH THE REGION WEDNESDAY NIGHT BEFORE CROSSING THE COMMONWEALTH THROUGH THE DAY ON THURSDAY. SPC HAS MUCH OF CENTRAL AND EASTERN PA IN A MARGINAL SEVERE RISK ON THURSDAY WITH THE FRONTAL PASSAGE. HEADING INTO THIS WEEKEND...UPPER-LEVEL TROUGHING OVER EASTERN CANADA AND THE NORTHEASTERN UNITED STATES WILL PRODUCE NORTHWESTERLY FLOW ALOFT. THE MODELS INDICATE A WEAK COLD FRONT MAY GENERATE A FEW SHRA/TSRA ACROSS MAINLY N/W PA ON SATURDAY. OTHERWISE...MAINLY DRY WEATHER WITH LOWER HUMIDITY IS EXPECTED FROM FRI-SUN. TEMPERATURES WILL REMAIN NEAR TO SLIGHTLY ABOVE CLIMATE NORMALS HEADING INTO THE FIRST WEEK OF AUGUST. && .AVIATION /06Z WEDNESDAY THROUGH SUNDAY/...
-- Changed Discussion --
AS OF 2 AM ONLY TRICKLES OF MVFR ARE BEGINNING TO OCCUR. CURRENTLY ONLY THV AND SEG ARE MVFR WITH DEWPOINT DEPRESSIONS OF 4 OR MORE AT LNS...MDT...IPT AND JST. AS THESE SITES ARE STILL FAIRLY DRY...EVEN CONSIDERING CALMING WINDS AND CLEARING SKIES...ANY FOG/LOW STRATOCU WILL TAKE LONGER TO DEVELOP. THE BEST CHANCE FOR IFR CIGS AND VSBYS WILL BE AT UNV...AOO AND BFD. HERE DEWPOINT DEPRESSIONS ARE 3 OR LESS AND TEMPERATURES ARE FORECASTED TO CONTINUE TO FALL. LIKEWISE WINDS ARE CALM AND SKIES ARE CLEARING. SO EXPECT MVFR PATCHY FOG/MIST TO BEGIN TO FORM BETWEEN 07Z TO 09Z AND INCREASE TO IFR BETWEEN 09Z AND 11Z. MDT AND LNS AND IPT SHOULD GO MVFR WITH IPT HAVING THE POTENTIAL OF IFR JUST BEFORE SUNRISE. FOG AND LOW CLOUDS WILL BURN OFF RAPIDLY EARLY WEDNESDAY LEADING TO ANOTHER VFR/SUNNY DAY UNDER HIGH PRESSURE. CLOUDS WILL START TO ADVANCE WED NIGHT AHEAD OF A COLD FRONT APPROACHING FROM THE WEST. SHOWERS IN ADVANCE OF THE FRONT MAY NUDGE INTO BFD BEFORE SUNRISE THURSDAY. THE FRONT SHOULD PASS EARLY THURSDAY BRINGING DRIER CONDITIONS AND A DECREASE IN THE COVERAGE OF SHOWERS AND THUNDERSTORMS. OUTLOOK... FRI...MAINLY VFR. SAT...MAINLY VFR...PM TSRA POSS W. SUN...MAINLY VFR.
-- End Changed Discussion --
&& .CTP WATCHES/WARNINGS/ADVISORIES... NONE. && $$ SYNOPSIS...DANGELO NEAR TERM...DANGELO/DEVOIR SHORT TERM...DANGELO LONG TERM...EVANEGO AVIATION...LA CORTE/CERU

USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.