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-- Discussion containing changed information from previous version are highlighted. --
000
FXUS61 KCTP 281445
AFDCTP

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
945 AM EST WED JAN 28 2015

.SYNOPSIS...

HIGH PRESSURE WILL BUILD OVER THE REGION TODAY...FOLLOWED BY AN
ALBERTA CLIPPER WHICH WILL CROSS THE AREA THURSDAY AND THURSDAY
NIGHT. HIGH PRESSURE WILL RETURN FOR LATE FRIDAY INTO
SATURDAY. A NEW STORM MAY BRING A ROUND OF WINTRY WEATHER FOR
LATER SUNDAY INTO MONDAY...BEFORE ANOTHER SURGE OF COLD AIR WORKS
INTO THE AREA EARLY NEXT WEEK.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...

LOW CLOUDS OVER SWRN AREAS WILL CONTINUE TO DWINDLE AND MIX OUT
LEAVING ALL AREAS SUNNY BY AFTERNOON.

HIGH PRESSURE WILL BUILD EAST FROM THE OHIO VALLEY TODAY...PROVIDING
ABUNDANT SUNSHINE. VERTICAL MIXING UP TO JUST 2 KFT AGL WILL LEAD
TO A NORTHWESTERLY BREEZE OF 8-13KT...WITH GUSTS INTO THE MID AND
UPPER TEENS ACROSS THE REGION NEAR AND TO THE EAST OF THE SUSQ
MAINSTEM.

DESPITE THE SUN...TEMPS WILL REMAIN WELL BELOW SEASONAL
NORMS...IN PART DUE TO FRESH SNOW COVER. GEFS MEAN 925TEMPS
SUPPORT HIGHS ONLY IN THE 20S. A RELAXING PRES GRADIENT WILL
RESULT IN A RELATIVELY LIGHT NW WIND BY LATER IN THE DAY.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH 6 AM THURSDAY/...
HIGH PRESSURE AND ASSOC LOW PWAT AIR MASS WILL DRIFT OVERHEAD THIS
EVENING. SOUTH-SSERLY SFC FLOW AND ANOMALOUSLY STG SWRLY FLOW
ALOFT DEVELOPS EARLY THURSDAY IN ADVANCE OF A FAIRLY POTENT
CLIPPER HEADED OUR WAY FROM THE WRN GLAKES REGION.

HIGH CLOUD SHIELD WILL ADVANCE EAST ACROSS THE REGION THIS
EVENING...BEFORE LOWERING AND THICKENING TO AN ALTO-NIMBOSTRATUS
DECK EARLY THURSDAY ACROSS THE WEST.

ANY LIGHT SNOW PRIOR TO DAYBREAK THURSDAY WILL BE LIMITED TO THE
EXTREME NW...AND EVEN THERE IT WILL BE MAINLY IN THE FORM OF NON-
ACCUMULATING FLURRIES.

LOW TEMPS TONIGHT WILL BE IN THE SINGLE DIGITS TO LOWER TEENS.

&&

.LONG TERM /THURSDAY THROUGH TUESDAY/...
A STRONG...SEVERAL TO 8 HOUR SHOT OF WAA ALOFT AND MODERATELY STG
UPPER LEVEL DIVERGENCE ASSOCIATED WITH THE RIGHT ENTRANCE REGION
OF A 300 MB JET MAX ACROSS SRN ONTARIO WILL LEAD TO PERIODS OF
LIGHT /TO BRIEFLY MDT SNOW/ FOCUSED ACROSS THE NW HALF OF THE
STATE THURSDAY AFTERNOON INTO THURSDAY NIGHT.

GUSTY WEST TO NORTHWEST WINDS AND BITTERLY COLD AIR WITH WIND
CHILLS AT OR BELOW ADVISORY CRITERIA APPEAR LIKELY FOR FRIDAY INTO
EARLY SATURDAY ACROSS THE CENTRAL AND NW PART OF THE STATE WITH
STEADY OR SLOWLY FALLING TEMPS DURING THE DAY FRIDAY.

SATURDAY STILL NOT LOOKING TOO BAD.

FOR SUNDAY...SOUTHERN STREAM SYSTEM WITH DECENT/RELATIVELY STG
DYNAMICS AND WAA SHOULD SPREAD PERIODS OF SNOW ACROSS THE STATE
SUNDAY AFTERNOON AND NIGHT WITH LIGHT TO MODERATE ACCUMS POSSIBLE.

FOR NOW WENT WITH SNOW. HOWEVER...SOME MIX COULD TRY TO WORK INTO
THE AREA...BUT THINK SYSTEM IS MOVING TOO FAST TO GET MUCH DEEP
WARM AIR INTO THE AREA.

SYSTEM MOVES OUT QUITE QUICKLY...AND SHOULD BE OFF THE COAST BY
LATE MONDAY MORNING IF NOT SOONER.

COLDER AIR WILL FOLLOW FOR MONDAY NIGHT INTO TUE. DID LOWER
TEMPS MONDAY NIGHT.

&&

.AVIATION /15Z WEDNESDAY THROUGH SUNDAY/...

HIGH PRESSURE WILL BUILD IN FROM THE WEST TODAY...BRINGING
WIDESPREAD VFR CONDITIONS. LOCALIZED IFR/MVFR OVER SWRN AREAS
EARLY WILL LIFT TO VFR BY MID DAY. NW WINDS WILL PICK UP A BIT
THE FIRST HALF OF THE DAY...WITH BREEZIEST CONDITIONS IN THE LOWER
SUSQ WHERE SUSTAINED NWRLY WINDS 15 TO 20 KTS WILL DEVELOP AFTER
SUNRISE AND PERSIST INTO MID AFTN.

ONLY THIN HIGH CLOUDS POSS TONIGHT AS WINDS BECOME LIGHT.


OUTLOOK...

THU...VFR TO START...WITH RESTRICTIONS SPREADING IN FROM THE
WEST STARTING MIDDAY.

THU NIGHT-EARLY FRI...WIDESPREAD IFR/MVFR IN SNOW.

SAT...VFR.

SUN...VFR TO START...WITH LATE DAY RESTRICTIONS SPREADING IN FROM
THE SW.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

$$
SYNOPSIS...LA CORTE/LAMBERT
NEAR TERM...LA CORTE/LAMBERT
SHORT TERM...LAMBERT
LONG TERM...LAMBERT/MARTIN
AVIATION...RXR/LA CORTE