Area Forecast Discussion
Issued by NWS State College, PA

Current Version | Previous Version | Text Only | Print | Product List | Glossary On
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 270749 AFDCTP AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 349 AM EDT WED APR 27 2016 .SYNOPSIS... A LARGE AREA OF HIGH PRESSURE OVER SOUTH CENTRAL CANADA WILL RIDGE SOUTHEAST INTO PENNSYLVANIA TODAY BRINGING DRY AND COOLER CONDITIONS. AN AREA OF LOW PRESSURE WILL MOVE OUT OF THE OHIO RIVER VALLEY AND SLIDE BY JUST TO THE SOUTH OF PENNSYLVANIA THURSDAY INTO FRIDAY...BRINGING PERIODS OF RAIN AND CONTINUED COOL TEMPERATURES. && .NEAR TERM /UNTIL 8 AM THIS MORNING/... SHALLOW...LEADING EDGE OF A COOLER AIRMASS WAS COMBINING WITH LIMITED LLVL MOISTURE ALL THE WAY FROM LAKE ONTARIO AND AN UPSLOPE FLOW OVER THE CENTRAL AND NORTHERN MTNS TO CREATE FAIRLY WIDESPREAD...BKN-OVC STRATUS AND STRATOCU. ACROSS THE SOUTHERN HALF OF PENN...A SHIELD OF CIRRUS AND CIRROSTRATUS BLOWING NORTHEAST OF SEVERAL MCS/S...WAS TOPPING A BKN-OVC LAYER OF HIGH- BASED STRATO CU. EXPECT PLENTY OF CLOUD COVER TO PERSIST THIS MORNING /AND LIKELY INTO THIS AFTERNOON/ ACROSS MUCH OF SOUTHERN AND CENTRAL PENN. LATEST HRRR AT VARIOUS GRID POINTS ACROSS NRN PENN AND SRN NEW YORK STATE INDICATES DRYING FROM THE NORTH WILL HELP TO DISSOLVE THE STRATUS OR PUSH IT SOUTH DURING THE MID TO LATE MORNING. LOW TEMPS EARLY TODAY WILL RANGE FROM THE FROSTY LOWER 30S ACROSS THE NORTHERN TIER COUNTIES...TO THE MID AND UPPER 40S IN THE SOUTH. SOME LOCATIONS CLOSE TO THE MASON/DIXON LINE MAY NOT DIP BELOW 50F THANKS TO THICKER/LAYER CLOUD COVER. && .SHORT TERM /8 AM THIS MORNING THROUGH 6 PM THURSDAY/... TODAY WILL BE ONE OF THE DRIER DAYS OF THE WEEK THANKS TO CANADIAN HIGH PRESSURE NOSING SOUTHWARD ACROSS THE GREAT LAKES. BAROCLINIC ZONE WILL STALL JUST SOUTH OF THE MASON DIXON LINE LIKELY RESULTING IN MCLDY SKIES OVER THE SOUTHERN COUNTIES...WHILE A GOOD DEAL OF SUNSHINE OCCURS ACROSS THE NRN MTNS /AFTER THE BREAKUP OF SOME EARLY MORNING STRATUS/. A MOSTLY CLOUDY START TO THE DAY ACROSS THE CENTRAL ZONES SHOULD TRANSITION INTO PTLY TO MOSTLY SUNNY SKIES FOR THE MID TO LATER AFTERNOON HOURS. MAX TEMPS BTWN 60-65F WILL BE COMMON FOR THE SOUTHERN HALF OF THE STATE TODAY...WHILE PORTIONS OF THE NRN MTNS MAY STRUGGLE TO REACH THE UPPER 50S. && .LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/... A SYSTEM TRACKING JUST SOUTH OF THE AREA ON THU WILL BRING PERIODS OF RAIN...AND MORE NOTABLY COOLER TEMPERATURES TO THE AREA. SOME OF THE GUIDANCE A LITTLE SLOWER WITH THE LEADING EDGE TODAY. A SECOND WEAK SYSTEM TRACKING SOUTH OF THE AREA ON FRIDAY WILL LIKELY BRING A FEW MORE SHOWERS TO THE AREA...AS AN INVERTED TROUGH TRIES TO FORM. STILL LOOKS LIKE MOST OF SAT WILL BE DRY. OVERALL A PATTERN THAT FAVORS WETTER CONDITIONS AS WE MOVE TOWARD MAY. THE PERIOD FROM LATER SUNDAY INTO EARLY TUE WILL LIKELY RESULT IN SOME RAIN. OVERALL NOT LOOKING REAL COLD...AS MAYBE THE GUIDANCE HINTED AT THE OTHER DAY...BUT A WETTER PATTERN THAN WE HAVE SEEN LATELY. && .AVIATION /08Z WEDNESDAY THROUGH SUNDAY/...
-- Changed Discussion --
LIMITED LLVL MOISTURE COMBINING WITH SHALLOW LEADING EDGE OF A COOLER AIRMASS TO PRODUCE SOME RESTRICTIONS MAINLY ACROSS NORTHERN AND WESTERN TERRAIN IN UPSLOPE FLOW. RESTRICTIONS SHOULD SPREAD ACROSS SOUTHERN HALF OVERNIGHT AND LINGER POSS INTO THE AFTERNOON ON WED BEFORE DRYING WORKS IN FROM THE NORTH AND HIGH PRESSURE TAKES OVER. UNSETTLED WEATHER ARRIVES THURSDAY INTO FRIDAY AS AN AREA OF LOW PRESSURE WILL MOVE OUT OF THE OHIO RIVER VALLEY AND SLIDE BY JUST TO THE SOUTH OF PENNSYLVANIA...BRINGING PERIODS OF RAIN AND LIKELY RESTRICTIONS. OUTLOOK... WED...CIG RESTRICTIONS THROUGH MIDDAY. THU-FRI...MVFR WITH SHRA LIKELY. SAT...FAIR. SUN...MVFR WITH SHRA LIKELY.
-- End Changed Discussion --
&& .CTP WATCHES/WARNINGS/ADVISORIES... NONE. && $$ SYNOPSIS...LAMBERT NEAR TERM...FITZGERALD/LAMBERT SHORT TERM...DEVOIR/FITZGERALD LONG TERM...MARTIN AVIATION...RXR

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