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 250940 AFDCTP AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 440 AM EST SUN JAN 25 2015 .SYNOPSIS... AN ALBERTA CLIPPER WILL TRACK JUST SOUTH OF PENNSYLVANIA SUNDAY NIGHT WITH ANOTHER WEAKER CLIPPER TAKING THE SAME PATH MONDAY NIGHT AND EARLY TUESDAY. HIGH PRESSURE WILL BUILD OVER THE REGION MID WEEK...FOLLOWED BY ANOTHER CLIPPER LATE THURSDAY. && .NEAR TERM /UNTIL 8 AM THIS MORNING/... HAVE CANCELLED THE FREEZING RAIN ADVISORY FROM CLEARFIELD CO NORTHWARD...WHERE ARRIVAL OF DEEPER MOISTURE HAS CHANGED PRECIP TO -SHSN. HOWEVER...LATEST NAM AND RAP SOUNDINGS INDICATE CLOUD TOP TEMPS WILL REMAIN ABV -10C ACROSS THE LAURELS...SO ANTICIPATE A CONTINUATION OF THE -FZRA/FZDZ DOWN THERE FOR MOST OF THE NIGHT. A CALL TO SOMERSET CO PENNDOT AT 05Z CONFIRMS THAT ROADS ARE ICY DOWN THERE. THE SNOW SHOWERS IN THE N/W SHOULD ONLY AMOUNT TO AN INCH OR SO OVERNIGHT. UNDER OVERCAST SKIES...TEMPS WILL NOT DROP MUCH THRU THE NIGHT. WINDS WILL BE GUSTY AS THE GRADIENT REMAINS TIGHT. && .SHORT TERM /8 AM THIS MORNING THROUGH 6 PM MONDAY/... LITTLE CHANGE FROM PREVIOUS EXPECTED ON SUNDAY. SOME LIGHT OROGRAPHIC SNOW MAY BE ONGOING SUNDAY MORNING ACROSS THE LAUREL HIGHLANDS. WILL CONTINUE TO FOCUS ON THE APPROACHING POTENT CLIPPER WHICH PROMISES TO BRING ANOTHER LIGHT TO LOCALLY MODERATE SNOW ACCUMULATION. THIS TIME IT IS THE LAURELS AND SC MOUNTAINS MOST SHARPLY FOCUSED IN ITS CROSS HAIRS FOR SUNDAY NIGHT INTO MONDAY. && .LONG TERM /MONDAY NIGHT THROUGH SATURDAY/... CLIPPER WILL BRING SOME SNOW TO THE AREA LATE SUNDAY AFT INTO MONDAY MORNING. ENERGY WILL QUICKLY TRANSFER TO THE COASTAL LOW DURING THE DAY ON MONDAY. EXPECT THE HEAVIEST SNOW ACROSS THE SOUTH CENTRAL PART OF THE STATE...GIVEN NW TO SE WARM FRONT. THUS LAUREL HIGHLANS WILL LIKELY SEE HIGHEST AMTS. DID EDGE POPS AND AMTS UP A LITTLE ACROSS THE SE...TO FIT IN BETTER WITH LWX. ALSO DID UP POPS ON TUESDAY. CONCERN IS THAT INVERTED TROUGH COULD KEEP SNOW ACROSS THE WEST INTO TUE...AND COASTAL STORM THAT DEEPENS EXTREMELY FAST MAY WRAP SNOW AROUND TO THE WEST SIDE...A CONCERN FOR THE EAST AND SE. BLOCKING HIGH TO THE NORTH. STILL A LITTLE EARLY FOR AN ADVISORY ACROSS THE SOUTH. TIGHT TEMP GRADIENT BETWEEN NY AND MD...SOME ADJUSTMENTS TO TEMPS MONDAY INTO TUE. WED STILL LOOKS LIKE A DRY DAY. ANOTHER FRONTAL SYSTEM FOR LATE THU. && .AVIATION /10Z SUNDAY THROUGH THURSDAY/... DECK OF LOWER STRATUS ASSOCIATED WITH NOW EXITING SHORTWAVE TROF PERSISTING ACROSS MUCH OF THE REGION...BRINGING GENERALLY MVFR CONDITIONS TO WESTERN AND CENTRAL TERMINALS...EXCEPT KJST WHERE LIFR PERSISTING WITH LIGHT FREEZING DRIZZLE TRANSITIONING TO LIGHT SNOW BY 11Z. DOWNSLOPING SHOULD BE ENOUGH TO KEEP SOUTHEAST AIRFIELDS IN VFR CONDITIONS. WINDS HAVE KICKED UP IN THE WEST AND CENTRAL MTNS AS FLOW INCREASES...WITH SURFACE SPEEDS OF 10-15 MPH WITH GUSTS TO 25 MPH. SOME IMPROVEMENT LIKELY STARTING MID/LATE MORNING FOR SEVERAL HOURS...WITH CIGS POTENTIALLY RISING TO VFR IN THE NORTH. BUT RESTRICTIONS WILL PERSIST AT KJST-KAOO THROUGH THE DAY. AN ALBERTA CLIPPER WILL TRACK JUST SOUTH OF PENNSYLVANIA SUNDAY NIGHT INTO MONDAY...BRINGING ANOTHER ROUND OF SNOW WITH IFR CONDITIONS TO THE REGION. THIS WILL LIKELY IMPACT MOST TAF SITES AFTER 00Z MONDAY...BUT SOME AFFECTS POSSIBLE KJST AND KAOO BEFORE THIS TIME...WHICH IS REFLECTED IN THE TAFS. EXPECT A PROLONGED PERIOD OF RESTRICTIONS INTO MON NIGHT. OUTLOOK... SUN NIGHT...SNOW RAPIDLY OVERSPREADING FROM SW TO NE...BRINGING IFR CONDITIONS TO THE ENTIRE REGION OVERNIGHT. MON...WIDESPREAD IFR/MVFR IN SNOW...GRADUAL IMPROVEMENT OVERNIGHT. TUE...AREAS MVFR IN SHSN WEST...AND ANY LINGERING SNOW IN THE EAST. WED...NO SIG WEATHER EXPECTED. THU...VFR TO START...WITH LATE DAY RESTRICTIONS SPREADING IN FROM THE WEST. && .CTP WATCHES/WARNINGS/ADVISORIES... FREEZING RAIN ADVISORY UNTIL 5 AM EST EARLY THIS MORNING FOR PAZ024-033. && $$ SYNOPSIS...DEVOIR NEAR TERM...DANGELO/FITZGERALD SHORT TERM...DEVOIR 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.