Area Forecast Discussion
Issued by NWS State College, PA

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FXUS61 KCTP 300001
AFDCTP

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
801 PM EDT FRI MAY 29 2015

.SYNOPSIS...
WARMER AND MORE HUMID CONDITIONS WILL CONTINUE INTO SATURDAY.
A SLOW MOVING COLD FRONT WILL BRING A CHANCE OF SHOWERS AND
THUNDERSTORMS SATURDAY INTO SUNDAY. DRIER WEATHER AND SEASONABLE
TEMPERATURES ARE EXPECTED EARLY NEXT WEEK.

&&

.NEAR TERM /UNTIL 6 AM SATURDAY MORNING/...
SCATTERED...DIURNALLY-DRIVEN...PULSE TYPE TSRA HAVE DEVELOPED
ACROSS WESTERN PA LATE THIS AFTN. MEAN LYR WIND FIELD INDICATES
THESE SHRA/TSRA WILL DRIFT NNE EARLY THIS EVENING...AFFECTING THE
PARTS OF THE ALLEGHENY PLATEAU. HOWEVER...WITH LACK OF LG SCALE
FORCING...EXPECT CONVECTION TO RAPIDLY DIE AFTER SUNSET.

A RATHER WARM AND MODERATELY HUMID REST OF THE NIGHT IS EXPECTED
BENEATH ANOMALOUS UPPER LVL RIDGE. LOWS WILL AVERAGE IN THE LOW
TO MID 60S.

&&

.SHORT TERM /6 AM SATURDAY MORNING THROUGH 6 PM SATURDAY/...
SATURDAY WILL BE ANOTHER SUMMERY DAY WITH A TENDENCY FOR MORE
WIDESPREAD DIURNAL CONVECTION TO BOIL UP. STILL THERE WILL BE NO
REAL FOCUS MECHANISM SO TIMING WILL TEND TO FAVOR THE AFTERNOON
AND EVENING.

TEMPS WILL BE A VIRTUAL CARBON COPY OF TODAY WITH HIGHS IN THE
UPPER 70S TO MID 80S.

&&

.LONG TERM /SATURDAY NIGHT THROUGH FRIDAY/...
HIGHEST POPS IN THE EXTENDED PERIOD CONTINUE TO BE ADVERTISED FOR
THE SUNDAY TO MONDAY TIMEFRAME AS COLD FRONT STALLS AND A WAVE IS
PROGGED TO RIPPLE ALONG THE FRONT AS IT LIES ACROSS CENTRAL PA.
PERSISTENT FORCING AND RICH MOISTURE FEED WITH PW IN THE 1.33" TO
1.8" RANGE BRING THE BEST CHANCE OF HEAVY RAINFALL TO CENTRAL PA
THAT WE`VE SEEN IN QUITE SOME TIME...AND CERTAINLY THIS SLOW
MOVING SYSTEM HAS THE POTENTIAL TO PRODUCE AT LEAST MINOR FLOODING
WHICH IS A SIGNIFICANT STATEMENT GIVEN THAT WE`RE STARTING OUT
MUCH DRIER THAN USUAL TO BEGIN.

TO THE NORTH OF THE FRONT...GUIDANCE REMAINS CONSISTENT ON COOLING
THINGS DOWN ACROSS NORTH CENTRAL PA...WITH EVEN SOME SIGNIFICANT
DRYING POSSIBLE AS DEWPOINTS POTENTIALLY DROP INTO THE 40S. TOO
EARLY TO GET HUNG UP ON THE DETAILS AS THEY WILL CHANGE...BUT AS
PREVIOUSLY MENTIONED...A COUPLE DAYS OF CLOUDY...COOL AND SHOWERY
WX APPEARS ON TAP FOR CENTRAL PA WITH THE STALLED FRONT AND
FREQUENT SHOWERS AND CHC OF THUNDERSTORMS.

A SLOW DRYING TREND BEGINS BY TUESDAY AS RICH PW PLUME SHIFTS
OFFSHORE AND SEVERAL DAYS OF COMFORTABLE TEMPERATURE AND HUMIDITY
LEVELS AND LOWER POPS APPEAR TO BE IN THE OFFING.

&&

.AVIATION /00Z SATURDAY THROUGH WEDNESDAY/...
CONVECTION ALONG THE DEWPOINT GRADIENT...MAINLY WEST OF THE
MOUNTAINS SO FAR. CONVECTION STARTING TO WEAKEN...AS EXPECTED.

00Z TAFS SENT.

EARLIER DISCUSSION BELOW.

VFR CONDITIONS ARE WIDESPREAD AND WILL CONTINUE INTO THE
EVENING INTERRUPTED ONLY BY SCATTERED CONVECTION THAT WILL
DEVELOP WITH AFTERNOON HEATING. WESTERN TERMINALS STAND THE BEST
CHANCE OF SEEING BRIEF REDUCTIONS ASSOCIATED WITH THE PASSING
SHOWERS OR THUNDERSTORMS.

VARIABLE AMOUNTS OF STRATOCU AND ALTOCU WILL BE AROUND TONIGHT IN
THE WARM HUMID AIRMASS...WITH MVFR VISIBILITIES IN HAZE
DEVELOPING AT MOST TERMINALS. THIS HAZE WILL TEND TO THIN OUT BY
MID TO LATE MORNING SATURDAY WITH ANOTHER AFTERNOON OF MAINLY VFR
WITH SCATTERED SHOWERS AND THUNDERSTORMS CAUSING LOCALIZED
REDUCTIONS.

OUTLOOK...

SUN-TUE...LOCALLY MVFR WITH SCT SHOWERS/TSTMS.

WED...NO SIG WX.

&&

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

&&

$$
SYNOPSIS...LA CORTE
NEAR TERM...FITZGERALD/LA CORTE
SHORT TERM...LA CORTE
LONG TERM...ROSS/DEVOIR
AVIATION...LA CORTE/MARTIN



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