Extreme Cold in Pennsylvania, February 14 to 16, 2015

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
653 PM EST SAT FEB 14 2015

.SYNOPSIS...
AN ARCTIC COLD FRONT WILL FINISH SWEEPING THROUGH THE
COMMONWEALTH THIS EVENING. THE COLDEST AIR OF THE SEASON WILL BE
UPON US SUNDAY INTO EARLY MONDAY ALONG WITH DANGEROUSLY LOW WIND
CHILLS OF 20 TO 35 BELOW ZERO. THE NEXT CHANCE FOR SNOW WILL BE
AROUND MID WEEK AS AN AREA OF LOW PRESSURE MOVES NORTHEAST FROM
THE GULF COAST STATES. THE ABNORMAL COLD WILL BE HERE FOR QUITE A
LONG TIME.

&&

.NEAR TERM /UNTIL 7 AM SUNDAY MORNING/...
645 PM UPDATE...
SQUALL CONTINUE EASTWARD AND LOOKS JUST AS BAD AS EVER. EARLIER
INDICATIONS FROM HRRR IMPLIED SOME WEAKENING...BUT NOT VERY MUCH
WEAKENING APPEARS TO BE HAPPENEING YET. LOSS OF DAYTIME HEATING -
FUNNY TO TYPE THAT WORD - WILL DOUBTLESSLY SERVE TO WEAKEN IT
SOMEWHAT - BUT NOT BEFORE IT IS ALMOST OUT OF THE CTP CWA. IT
CONTINUES MOVING AT A REGULAR PACE AND HAVE TIMED IT OUT IN LESS
THAN 2 HRS. EXPECT THE NASTY WINDS AND ISOLD/SCT SHSN BEHIND IT TO
DIMINISH A BIT FOR THE NEXT HR OR TWO. BUT THE NWRLY FLOW WILL
BRING ADDTNL SHSN INTO THE NW AND LAURELS ALL NIGHT AND FLURRIES
ELSEWHERE. WIND CHILL IS ALREADY -14 AT BFD/DUJ AND -13 AT JST.
ALL LOOKS TO BE IN LINE...BUT MAY BE ABLE TO DO SOME CHOPPING OF
THE WINT WX ADVY WITH THE NEXT UPDATE - AS SNOW AMOUNTS WILL BE
LIGHTER OVERNIGHT.

PREV...
SENT A QUICK UPDATE TO COVER INCLUDING THE SOUTHERN ZONES IN A
WINTER WEATHER ADVISORY.

MESO ANAL INDICATES THE ARCTIC COLD FRONT AT MID DAY IS ENTERING
FAR NWRN PA. RADAR SHOWS A DEVELOPING LINE OF SNOW SHOWERS AND
SQUALLS ALONG THE SHARP CONVERGENCE ZONE. LOCALLY WE HAVE A
WIDESPREAD AREA OF FAIRLY LIGHT SNOW BEING FORCED BY STRONG WARM
ADVECTION AHEAD OF THE APPROACHING FRONT. HIGHER ELEVATIONS TO OUR
WEST HAVE EXPERIENCED SMALL ACCUMS OF AN INCH OR 2...WHILE JUST
EAST OF THE HIGHER TERRAIN AMOUNTS HAVE BEEN OF THE NUISANCE OR
DUSTING VARIETY.

HIGH RES MODELS CONTINUE TO INDICATE A LINE OF SNOW SQUALLS NOW
ENTERING NW PORTIONS OF THE REGION...PROGRESSING OFF TO THE EAST
THEREAFTER. RAP DEVELOPS SOME IMPRESSIVE INSTABILITY FOR MID
FEBRUARY...WITH STEEPENING LOW-MID LEVEL LAPSE RATES AND EVEN
COOKING UP A COUPLE OF HUNDRED JOULES OF CAPE IN RESPONSE TO
RAPIDLY FALLING HEIGHTS AND TEMPS ALOFT.

CURRENT TIMING HAS THE COLD FRONT/SQUALL LINE MOVING THROUGH
BRADFORD AROUND 20Z/3PM...MOVING EAST TO A LINE FROM JOHNSTOWN
THROUGH CLEARFIELD UP INTO COUDERSPORT AROUND 21Z/4PM...AND INTO
RENOVO-STATE COLLEGE-ALTOONA BY 22Z/5PM. EAST OF THE CENTRAL
MOUNTAINS THE HRRR TRIES TO MAKE THE SQUALL LINE MORE
DISORGANIZED SO TIMING MAY BE MORE NEBULOUS.

I WOULD NOT RULE OUT A LITTLE THUNDER SNOW AS THE FORCING LOOKS
ESPECIALLY ROBUST FOR THE TIME OF YEAR.

TEMPS IN THE 20S TO LOWER 30S AHEAD OF THE FRONT AND THE
POTENTIAL FOR WET/PRE-TREATED ROADS FROM ANY LIGHT SNOW AHEAD OF
THE FRONT...WILL LEAD TO A DANGEROUS...FLASH FREEZE SETUP AS THE
ARCTIC FRONT PLOWS EAST ACROSS THE STATE ACCOMPANIED BY ONE OR TWO
DISTINCT NORTH/SOUTH BANDS OF BLINDING SNOW SQUALLS...SHARPLY
FALLING TEMPS...AND WIND GUSTS OF 35-45 MPH. HAZARDOUS INTERSTATE
TRAVEL CONDITIONS ARE EXPECTED TO DEVELOP FROM WEST TO EAST THIS
AFTERNOON.

A WINTER WX ADVISORY COVERS MUCH OF CENTRAL PA THROUGH 12Z SUNDAY
AS MODEL BLENDED QPF COMBINED WITH SLR/S OF CLOSE TO 20/1 SUPPORT
A GENERAL 2-4 INCH SNOWFALL TODAY AND TONIGHT FROM THE ONE-TWO
PUNCH OF THE ARCTIC FRONT...THEN PERIODS OF SNOW/SNOW SHOWERS
ASSOCIATED WITH THE PASSAGE OF THE SE DIGGING CLOSED UPPER LOW.
THE HIGHER SNOWFALL AMOUNTS WILL BE CONFINED TO MAINLY THE NW
MTNS...WRN POCONOS AND ENDLESS MTNS OF NEPA...AND THE LAUREL
HIGHLANDS IN THE SOUTHWEST.

EVEN THOSE LOCATIONS THAT FALL SHORT OF ADVISORY CRITERIA SNOW
WILL HAVE TO CONTEND WITH AREAS OF BLOWING/DRIFTING SNOW BEHIND
THE COLD FRONT LATE TODAY AND TONIGHT. BUFKIT SOUNDINGS SUPPORT
FREQUENT GUSTS IN THE 35-40KT RANGE IN WAKE OF FRONT ACROSS MUCH
OF THE CENTRAL RIDGE AND VALLEY REGION...LASTING THRU TONIGHT.
EVEN HIGHER GUSTS...OCNLY UP TO BETWEEN 45-50 KTS APPEAR LIKELY
ACROSS THE REGION NEAR AND TO THE SE OF I-81...SO THE HIGH WIND
WATCH TRANSITIONED TO A HIGH WIND WARNING THERE. THE HIGH WIND
WARNING AND WIND ADVISORY RUNS THROUGH NOON SUNDAY.

THE LOW SHOULD BE QUICKLY RE-DEVELOPING OVER EASTERN PA OR OVER
THE COASTAL WATERS BY EVENING...WITH THE LOCAL AREA TRANSITIONING
INTO A POST COLD FRONTAL FLOW PATTERN. WITH THE LOW EXPECTED TO
BE DEEPENING RAPIDLY...STRONG GUSTY WINDS WILL DEVELOP AND
CONTINUE INTO THE OVERNIGHT CAUSING WIND CHILLS TO DIP TO
DANGEROUSLY LOW LEVELS OVER THE ENTIRE FCST AREA. AFTER
COLLABORATION WITH SURROUNDING WFOS WE DECIDED TO ISSUE A WIND
CHILL WARNING FOR THE ENTIRE CWA TONIGHT THROUGH MONDAY MORNING.

ACTUAL AIR TEMPERATURES WILL PLUMMET TONIGHT TO BETWEEN 5 AND 15
DEGREES BELOW ZERO ACROSS THE NORTHWEST MOUNTAINS AND LAUREL
HIGHLANDS...AND SETTLE BETWEEN ZERO AND 5 ABOVE THROUGHOUT THE
LARGER METRO AREAS OF THE LOWER SUSQUEHANNA VALLEY.

&&

.SHORT TERM /7 AM SUNDAY MORNING THROUGH 6 PM SUNDAY/...
SHALLOW STRATO CU CLOUDS CLOUDS SHOULD BREAK ALONG AND TO THE SE
OF THE I-99/I-80/RT 220 CORRIDOR SUNDAY AS HIGH PRESSURE BUILDS
EAST FROM THE OHIO VALLEY LATE IN THE DAY. SCATTERED FLURRIES WILL
OCCUR SUNDAY AFTERNOON ACROSS THE CENTRAL ZONES...WHILE THE NW
MTNS AND LAURELS COULD SEE LOCALLY UP TO ANOTHER ADDITIONAL
COATING TO ONE INCH FROM SCATTERED SNOW SHOWERS.

HIGH TEMPERATURES WILL STRUGGLE TO REACH 5 BELOW ZERO ACROSS THE
NORTHWEST MOUNTAINS...AND WILL ONLY MAKE IT TO 10 TO 12 DEGREES
ABOVE ZERO ACROSS THE LOWER SUSQUEHANNA VALLEY.

&&

.LONG TERM /SUNDAY NIGHT THROUGH SATURDAY/...
VERY COLD AIR WILL CONTINUE TO IMPACT THE REGION THROUGH AT LEAST
THE NEXT WEEK AS STRONG RIDGE OVER WESTERN U.S. CONTINUES TO
DIRECT POLAR AIR INTO THE EASTERN U.S. VIA PERSISTENT TROUGH.

RECORD LOWS FOR THE DATE EARLY MONDAY APPEAR LIKELY. LOWS EARLY
MONDAY MORNING UNDER CLEAR TO PARTLY CLOUDY SKIES WITH DIMINISHING
WIND WILL EASILY AVERAGE 10-15 BELOW ZERO ACROSS THE NRN AND
WESTERN MTNS...AND 5-10 BELOW ZERO THROUGHOUT MUCH OF THE CENTRAL
RIDGE AND VALLEY REGION. SOME PROTECTED VALLEYS ACROSS THE NORTH
COULD DIP TO NEAR 25 BELOW BETWEEN 09-12Z MONDAY. SURFACE HIGH
WILL PROPAGATE ACROSS CENTRAL PA MONDAY AND MONDAY NIGHT...MOVING
OFFSHORE ON TUESDAY.

STILL AT LEAST SOME POTENTIAL INDICATED FOR SOME PHASING OF
NORTHERN AND SOUTHERN STREAM WAVES OVER THE GULF COAST AND
SOUTHEASTERN U.S. BY LATER TUE INTO WED...BRINGING THE CHANCE OF
SNOW TO THE REGION. HOWEVER...AGAIN TODAY MODEL TRENDS OVER CONTINUE
TO LEND CREDENCE TOWARD A MORE SUPPRESSED/FLATTER SOUTHERN STREAM
SYSTEM WITH THE ARCTIC AIR DOMINATING THE GREAT LAKES REGION AND
NE U.S. AND THE BULK OF ANY STEADIER/STRATIFORM PRECIP STAYING
CONFINED TO THE SE U.S. AND MAYBE THE VIRGINIAS.

YET ANOTHER SURGE OF EXTREMELY COLD AIR RIDES IN ON PERSISTENT
NORTHWEST LATE NEXT WEEK...AS A MASSIVE RIDGE OF SURFACE HIGH
PRESSURE COVERS THE EASTERN HALF OF THE CONUS.

&&

.AVIATION /00Z SUNDAY THROUGH THURSDAY/...
NOT A LOT OF CHANGE FROM EARLIER. 00Z TAFS SENT.

MOST INTENSE SNOW WENT JUST SE OF IPT.

SOUTHERN END OF THE BAND WEAKEN AS IT MOVED EAST OF BEDFORD.

HOWEVER...MORE MULTIPLE BANDS FORMED ACROSS THE SE...WHERE
IT WAS A LITTLE WARMER.

EARLIER DISCUSSION BELOW.

CURRENT FCST LOOKS GOOD. MINOR ADJUSTMENTS MADE TO THE 21Z TAFS.

EVEN SOME THUNDER WITH THE SNOW SQUALLS.

FROM EARLIER THIS AFT.

THE ARCTIC COLD FRONT IS ENTERING NWRN PA AS OF MID DAY....

A SFC LOW ASSOCIATED WITH THE COLD FRONT TRACK ESE ACROSS THE NRN
MID ATLANTIC STATES THIS AFTERNOON BEFORE RAPIDLY INTENSIFYING
JUST OFFSHORE SRN NEW ENGLAND TONIGHT INTO EARLY SUNDAY.

THE ARCTIC COLD FRONT WILL MOVE THROUGH THE FLYING AREA AND BE
THE FOCUS FOR LOCALLY HEAVY SNOW SQUALLS THIS AFTERNOON AND
EVENING...WITH AN AREA OF PRE-FRONTAL LIGHT SNOW AND MVFR/IFR
CONDITIONS ALREADY IMPACTING THE WRN 1/3 TO 1/2 OF THE AIRSPACE.

OVERALL EXPECT PREVAILING IFR ACROSS THE HIGHER ELEVATION SITES
FROM JST UP THROUGH BFD. CENTRAL TERMINALS WILL SEE PERIODS OF
IFR BUT MVFR WILL MORE LIKELY BE THE PREVAILING FLIGHT CAT.

PREVAILING VFR WITH PERIODS OF MVFR CAN BE EXPECTED AT THE SERN
SITES. USED 1HR TEMPO TO SHOW BEST TIME WINDOW FOR HEAVY SNOW AND
REDUCED CONDITIONS ASSOCIATED WITH EXPECTED SNOW SQUALL
ACTIVITY...WITH A SHARP DROP IN VIS TO 1/2 MILE OR LESS. WIND WILL
BECOME THE MAIN CONCERN LATER TONIGHT INTO EARLY SUNDAY WITH
PEAK GUSTS IN THE 35-45KT RANGE FROM AROUND 300 DEGREES. MVFR/IFR
IN OCNL SHSN WILL LINGER OVER THE WRN TERMINALS INTO SUNDAY WITH
GRADUAL IMPROVEMENT EXPECTED DURING THE DAY. ELSEWHERE LOOK FOR A
RETURN TO LOW VFR WITH CIGS BTWN 3000-5000'.

OUTLOOK...

MON-TUE...VFR/NO SIG WX.

WED-THU...MVFR/IFR SHSN WEST. VFR/MVFR EAST.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
WINTER WEATHER ADVISORY UNTIL 7 AM EST SUNDAY FOR PAZ004>006-
010>012-017>019-024>028-033>037-041-042-045-046-049>053-
056>059-063>066.
WIND ADVISORY UNTIL NOON EST SUNDAY FOR PAZ012-017>019-024>028-
033>035-037-041-042-045-046-049>053.
WIND CHILL WARNING FROM MIDNIGHT TONIGHT TO 10 AM EST MONDAY
FOR PAZ012-018-019-025>028-034>037-041-042-045-046-049>053-
056>059-063>066.
WIND CHILL WARNING UNTIL 10 AM EST MONDAY FOR PAZ004>006-010-
011-017-024-033.
HIGH WIND WARNING UNTIL NOON EST SUNDAY FOR PAZ036-056>059-
063>066.

&&

SYNOPSIS...LA CORTE
NEAR TERM...DANGELO/LA CORTE
SHORT TERM...LA CORTE
LONG TERM...LAMBERT/GARTNER
AVIATION...LA CORTE/MARTIN

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
224 PM EST SAT FEB 14 2015

PAZ012-018-019-025>028-034-035-037-041-042-045-046-049>053-151930-
NORTHERN CLINTON-NORTHERN CENTRE-SOUTHERN CENTRE-BLAIR-HUNTINGDON-
MIFFLIN-JUNIATA-BEDFORD-FULTON-TIOGA-NORTHERN LYCOMING-SULLIVAN-
SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-
NORTHUMBERLAND-COLUMBIA-
224 PM EST SAT FEB 14 2015

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 AM EST SUNDAY...
...WIND ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO NOON EST
SUNDAY...
...WIND CHILL WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM EST
MONDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   WINTER WEATHER ADVISORY.
   WIND ADVISORY.
   WIND CHILL WARNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   WINTER WEATHER ADVISORY.
   WIND ADVISORY.
   WIND CHILL WARNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ004>006-010-011-151930-
WARREN-MCKEAN-POTTER-ELK-CAMERON-
224 PM EST SAT FEB 14 2015

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 AM EST SUNDAY...
...WIND CHILL WARNING IN EFFECT FROM 7 PM THIS EVENING TO 10 AM EST
MONDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   WINTER WEATHER ADVISORY.
   WIND CHILL WARNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   WINTER WEATHER ADVISORY.
   WIND CHILL WARNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ017-024-033-151930-
CLEARFIELD-CAMBRIA-SOMERSET-
224 PM EST SAT FEB 14 2015

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 AM EST SUNDAY...
...WIND CHILL WARNING IN EFFECT FROM 7 PM THIS EVENING TO 10 AM EST
MONDAY...
...WIND ADVISORY IN EFFECT FROM 7 PM THIS EVENING TO NOON EST
SUNDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   WINTER WEATHER ADVISORY.
   WIND CHILL WARNING.
   WIND ADVISORY.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   WINTER WEATHER ADVISORY.
   WIND CHILL WARNING.
   WIND ADVISORY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

PAZ036-056>059-063>066-151930-
FRANKLIN-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-ADAMS-YORK-
LANCASTER-
224 PM EST SAT FEB 14 2015

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 AM EST SUNDAY...
...HIGH WIND WARNING IN EFFECT FROM 7 PM THIS EVENING TO NOON EST
SUNDAY...
...WIND CHILL WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 10 AM EST
MONDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   WINTER WEATHER ADVISORY.
   HIGH WIND WARNING.
   WIND CHILL WARNING.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO
WEATHER.GOV/STATECOLLEGE ON THE INTERNET FOR MORE
INFORMATION ABOUT THE FOLLOWING HAZARDS.

   WINTER WEATHER ADVISORY.
   HIGH WIND WARNING.
   WIND CHILL WARNING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
328 PM EST SAT FEB 14 2015

PAZ006-010>012-017>019-024>026-037-041-142130-
NORTHERN CLINTON-TIOGA-SOUTHERN CENTRE-CLEARFIELD-CAMBRIA-NORTHERN
CENTRE-CAMERON-HUNTINGDON-POTTER-NORTHERN LYCOMING-ELK-BLAIR-
328 PM EST SAT FEB 14 2015

...A SEVERE SNOW SQUALL WILL CROSS CENTRAL PENNSYLVANIA FROM WEST TO
EAST THIS AFTERNOON AND EARLY THIS EVENING...

AT 326 PM EST...A SEVERE SNOW SQUALL WAS ALONG A LINE EXTENDING FROM
NEAR COUDERSPORT TO NEAR PARKER DAM STATE PARK TO NANTY GLO...MOVING
EAST AT 30 TO 35 MPH.

LOCATIONS IMPACTED INCLUDE...
ALTOONA...STATE COLLEGE...JOHNSTOWN...CLEARFIELD...BELLEFONTE...
HOLLIDAYSBURG...TYRONE...WESTMONT...ELIM...MANSFIELD...EBENSBURG...
WELLSBORO...NANTY-GLO...PORTAGE...PARK FOREST VILLAGE...CAMERON...
NORTHERN CAMBRIA...WHARTON...KEATING AND MORRIS.

FOR THOSE DRIVING ON INTERSTATE 80...THIS INCLUDES AREAS BETWEEN THE
DUBOIS ROUTE 255 AND BELLEFONTE EXITS...SPECIFICALLY FROM MILE
MARKERS 106 TO 159.

THIS ALSO INCLUDES INTERSTATE 99 FROM MILE MARKERS 19 TO 76.

VISIBILITIES WILL DROP QUICKLY TO NEAR ZERO IN THIS SEVERE SQUALL.

USE EXTRA CAUTION IF YOU MUST TRAVEL INTO OR THROUGH THIS DANGEROUS
SNOW SQUALL. RAPID CHANGES IN VISIBILITY AND POTENTIALLY SLICK ROADS
ARE LIKELY TO LEAD TO ACCIDENTS. CONSIDER DELAYING TRAVEL UNTIL THE
SQUALL PASSES YOUR LOCATION.

CONDITIONS CAN DETERIORATE RAPIDLY IN WINTER WEATHER SITUATIONS. BE
PREPARED FOR SNOW OR ICE COVERED ROADS. SLOW DOWN AND ALLOW EXTRA
TIME WHEN TRAVELING.

LAT...LON 4200 7693 4190 7691 4031 7828 4030 7904
      4072 7880 4085 7881 4121 7856 4199 7774
TIME...MOT...LOC 2026Z 268DEG 27KT 4184 7793 4118 7852 4046 7918

DANGELO

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
427 PM EST SAT FEB 14 2015

PAZ012-018-019-024>026-033-034-037-041-045-142215-
NORTHERN CLINTON-TIOGA-SOUTHERN CLINTON-BEDFORD-SOMERSET-SOUTHERN
CENTRE-CAMBRIA-NORTHERN CENTRE-HUNTINGDON-NORTHERN LYCOMING-BLAIR-
427 PM EST SAT FEB 14 2015

...A SEVERE SNOW SQUALL WILL CONTINUE TO CHARGE THROUGH THE CENTRAL
MOUNTAINS...

AT 424 PM EST...A SEVERE SNOW SQUALL WAS ALONG A LINE EXTENDING FROM
WELLSBORO TO SNOW SHOE TO NORTHERN SOMERSET COUNTY...AND MOVING EAST
AT 30 TO 35 MPH.

VISIBILITIES WILL DROP QUICKLY TO NEAR ZERO IN THIS SEVERE SQUALL.
WIND GUSTS UP TO 40 MPH ARE ALSO POSSIBLE WITH THIS SEVERE SQUALL.

LOCATIONS IMPACTED INCLUDE...
ALTOONA...STATE COLLEGE...LOCK HAVEN...HUNTINGDON...BELLEFONTE...
HOLLIDAYSBURG...TYRONE...MANSFIELD...AND WELLSBORO.

FOR THOSE DRIVING ON INTERSTATE 80...THIS INCLUDES AREAS BETWEEN THE
KYLERTOWN AND LOGANTON EXITS...SPECIFICALLY FROM MILE MARKERS 138 TO
179.

THIS ALSO INCLUDES INTERSTATE 99 FROM MILE MARKER 2 TO 85.

USE EXTRA CAUTION IF YOU MUST TRAVEL INTO OR THROUGH THIS DANGEROUS
SNOW SQUALL. RAPID CHANGES IN VISIBILITY AND POTENTIALLY SLICK ROADS
ARE LIKELY TO LEAD TO ACCIDENTS. CONSIDER DELAYING TRAVEL UNTIL THE
SQUALL PASSES YOUR LOCATION.

CONDITIONS CAN DETERIORATE RAPIDLY IN WINTER WEATHER SITUATIONS. BE
PREPARED FOR SNOW OR ICE COVERED ROADS. SLOW DOWN AND ALLOW EXTRA
TIME WHEN TRAVELING.

LAT...LON 4200 7693 4166 7688 4126 7724 4122 7732
      4120 7730 4009 7825 4007 7893 4095 7815
      4096 7808 4097 7810 4103 7808 4148 7767
      4148 7760 4156 7760 4200 7719
TIME...MOT...LOC 2124Z 270DEG 27KT 4194 7720 4100 7804 4013 7881

DANGELO

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
507 PM EST SAT FEB 14 2015

PAZ012-019-026>028-034>037-041-042-045-046-049-050-056-142245-
JUNIATA-SNYDER-PERRY-TIOGA-NORTHERN CLINTON-SOUTHERN
CLINTON-BEDFORD-MIFFLIN-UNION-SULLIVAN-SOUTHERN
CENTRE-FRANKLIN-FULTON-SOUTHERN LYCOMING-HUNTINGDON-NORTHERN
LYCOMING-
507 PM EST SAT FEB 14 2015

...A SEVERE SNOW SQUALL CONTINUES TO PUSH THROUGH THE CENTRAL
MOUNTAINS...

AT 500 PM EST...A SEVERE SNOW SQUALL WAS ALONG A LINE EXTENDING FROM
MANSFIELD TO STATE COLLEGE TO CUMBERLAND MARYLAND. THE SQUALL IS
MOVING TO THE EAST AT 25 TO 30 MPH. WIND GUSTS UP TO 40 MPH ARE
POSSIBLE WITH THIS SEVERE SQUALL. VISIBILITIES WILL GO TO NEAR ZERO
AS THE SQUALL PASSES. THE WHITEOUT CONDITIONS MAY LAST 20 TO 30
MINUTES AS THE SQUALL GOES THROUGH YOUR LOCATION.

IF YOU ARE DRIVING AND ENCOUNTER THIS SQUALL...SLOW DOWN AND MAKE
SURE YOUR HEADLIGHTS ARE ON SO PEOPLE IN FRONT AND BEHIND YOU CAN
SEE WHERE YOUR VEHICLE IS LOCATED. CONSIDER STOPPING AND WAITING FOR
THE CONDITIONS TO IMPROVE. USE YOUR EMERGENCY FLASHERS AND PULL WELL
OFF THE ROAD OR INTO A REST AREA OR PARKING LOT IF POSSIBLE.

LOCATIONS IMPACTED INCLUDE...
STATE COLLEGE...WILLIAMSPORT...LOCK HAVEN...LEWISTOWN...HUNTINGDON...
BELLEFONTE...MONTOURSVILLE...JERSEY SHORE...BREEZEWOOD...AND LAMAR.

FOR THOSE DRIVING ON INTERSTATE 80...THIS INCLUDES AREAS BETWEEN THE
SNOW SHOE AND LEWISBURG-WILLIAMSPORT EXITS...SPECIFICALLY FROM MILE
MARKERS 157 TO 203.

THIS ALSO INCLUDES THE FOLLOWING INTERSTATES... INTERSTATE 70 FROM
MILE MARKERS 147 TO 170. THE PENNSYLVANIA TURNPIKE FROM MILE MARKERS
152 TO 196. INTERSTATE 99 FROM MILE MARKERS 72 TO 85. INTERSTATE 180
FROM MILE MARKERS 18 TO 29.

LAT...LON 3972 7860 4085 7788 4188 7695 4160 7688
      4157 7661 3974 7801
TIME...MOT...LOC 2200Z 284DEG 23KT 4180 7697 4082 7784 3966 7858

DANGELO

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
552 PM EST SAT FEB 14 2015

PAZ028-036-041-042-046-049>053-056-057-063-142330-
CUMBERLAND-UNION-SULLIVAN-JUNIATA-COLUMBIA-FRANKLIN-SOUTHERN
LYCOMING-SNYDER-DAUPHIN-NORTHERN
LYCOMING-PERRY-NORTHUMBERLAND-MONTOUR-
552 PM EST SAT FEB 14 2015

...A SEVERE SNOW SQUALL WILL CONTINUE MOVING THROUGH THE CENTRAL
MOUNTAINS AND INTO THE SUSQUEHANNA VALLEY THROUGH 630 PM EST...

AT 547 PM EST...A SEVERE SNOW SQUALL WAS ALONG A LINE EXTENDING
WILLIAMSPORT TO NEAR R.B. WINTER STATE PARK TO SHIPPENSBURG...AND
MOVING EAST AT ABOUT 30 MPH. WIND GUSTS UP TO 40 MPH ARE POSSIBLE
WITH THIS SEVERE SQUALL...AND WILL CREATE NEAR WHITEOUT CONDITIONS.

LOCATIONS IMPACTED INCLUDE...
CARLISLE...BLOOMSBURG...SUNBURY...MILTON...LEWISBURG...SELINSGROVE...
SHIPPENSBURG...DANVILLE...MONTOURSVILLE...NORTHUMBERLAND...
MIFFLINBURG...MARYSVILLE...MUNCY AND WATSONTOWN.

FOR THOSE DRIVING ON INTERSTATE 80...THIS INCLUDES AREAS BETWEEN THE
JERSEY SHORE AND BERWICK-LIME RIDGE EXITS...SPECIFICALLY FROM MILE
MARKERS 196 TO 238.

THIS ALSO INCLUDES THE FOLLOWING INTERSTATES... THE PENNSYLVANIA
TURNPIKE FROM MILE MARKERS 197 TO 232. INTERSTATE 81 FROM MILE
MARKERS 22 TO 62. INTERSTATE 180 FROM MILE MARKERS 1 TO 24.

USE EXTRA CAUTION IF YOU MUST TRAVEL INTO OR THROUGH THIS DANGEROUS
SNOW SQUALL. RAPID CHANGES IN VISIBILITY AND POTENTIALLY SLICK ROADS
ARE LIKELY TO LEAD TO ACCIDENTS. CONSIDER DELAYING TRAVEL UNTIL THE
SQUALL PASSES YOUR LOCATION.

A RAPID DROP IN TEMPERATURES MAY LEAD TO THE RAPID FORMATION OF
BLACK ICE ON AREA ROADWAYS. BLACK ICE IS NEARLY IMPOSSIBLE TO SEE
AND ROADWAYS MAY APPEAR WET. PLEASE USE EXTREME CAUTION...ESPECIALLY
ON BRIDGES...OVERPASSES AND AROUND CURVES. ALLOW PLENTY OF STOPPING
DISTANCE AND AVOID BRAKING SUDDENLY.

LAT...LON 3991 7785 4067 7737 4069 7729 4070 7735
      4105 7712 4158 7671 4154 7622 4131 7631
      4121 7632 4115 7629 4067 7667 4066 7670
      4065 7669 4009 7713
TIME...MOT...LOC 2247Z 255DEG 35KT 4130 7684 4098 7713 4026 7754

DANGELO

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
558 PM EST SAT FEB 14 2015

PAZ036-057-059-063>066-150000-
CUMBERLAND-YORK-FRANKLIN-DAUPHIN-LANCASTER-ADAMS-LEBANON-
558 PM EST SAT FEB 14 2015

...AN AREA OF BRIEFLY HEAVY SNOW WILL AFFECT THE SOUTHERN MOUNTAINS
AND LOWER SUSQUEHANNA VALLEY...

AT 554 PM EST...AN AREA OF HEAVY SNOW WAS OVER SOUTH MOUNTAIN AND
STRETCHED EASTWARD INTO GETTYSBURG AND YORK. THE SNOW MAY DROP THE
VISIBILITY TO LESS THAN ONE QUARTER OF A MILE IN JUST A MINUTE. THE
SNOW WILL SLIDE TO THE EAST INTO LANCASTER...WHILE A SEPARATE BUT
VERY STRONG SNOW SQUALL MOVES TOWARD THE HARRISBURG METRO AREA FROM
THE WEST.

CONDITIONS CAN DETERIORATE RAPIDLY IN WINTER WEATHER SITUATIONS. BE
PREPARED FOR SNOW OR ICE COVERED ROADS. SLOW DOWN AND ALLOW EXTRA
TIME WHEN TRAVELING.

LOCATIONS IMPACTED INCLUDE...
LANCASTER...YORK...CHAMBERSBURG...HANOVER...HERSHEY...EPHRATA...
WEIGELSTOWN...ELIZABETHTOWN...WAYNESBORO...COLUMBIA...LITITZ...
MIDDLETOWN...MILLERSVILLE...GETTYSBURG...WILLOW STREET...MOUNT
JOY... PARKVILLE...RED LION...STEELTON AND SHIPPENSBURG.

LAT...LON 3973 7809 4006 7764 4035 7620 4014 7588
      4011 7594 3987 7599 3972 7610
TIME...MOT...LOC 2254Z 255DEG 35KT 3990 7672

DANGELO

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
635 PM EST SAT FEB 14 2015

PAZ042-046-050>053-056>059-063>066-150015-
CUMBERLAND-YORK-SNYDER-SCHUYLKILL-LANCASTER-PERRY-LEBANON-MONTOUR-
SULLIVAN-COLUMBIA-SOUTHERN LYCOMING-DAUPHIN-ADAMS-NORTHUMBERLAND-
635 PM EST SAT FEB 14 2015

...A DANGEROUS SNOW SQUALL WILL MOVE THROUGH THE SUSQUEHANNA
VALLEY...

AT 630 PM EST...A DANGEROUS SNOW SQUALL WAS ALONG A LINE EXTENDING
FROM MUNCY TO SUNBURY TO GETTYSBURG...AND MOVING EAST AT 40 MPH.

LOCATIONS IMPACTED INCLUDE...
HARRISBURG...YORK...LEBANON...CARLISLE...BLOOMSBURG...
POTTSVILLE...HERSHEY...ELIZABETHTOWN...BERWICK...
SUNBURY...MECHANICSBURG...CAMP HILL AND SHAMOKIN.

VISIBILITIES WILL DROP QUICKLY TO LESS THAN A QUARTER OF A MILE IN
THIS DANGEROUS SQUALL. WINDS MAY GUST TO 35 OR 40 MPH AS THE SQUALL
PASSES.

USE EXTRA CAUTION IF YOU MUST TRAVEL INTO OR THROUGH THIS DANGEROUS
SNOW SQUALL. RAPID CHANGES IN VISIBILITY AND POTENTIALLY SLICK ROADS
ARE LIKELY TO LEAD TO ACCIDENTS. CONSIDER DELAYING TRAVEL UNTIL THE
SQUALL PASSES YOUR LOCATION.

FOR THOSE DRIVING ON INTERSTATE 80...THIS INCLUDES AREAS BETWEEN THE
MILTON-WILLIAMSPORT AND NESCOPEK EXITS...SPECIFICALLY FROM MILE
MARKERS 213 TO 247.

THIS ALSO INCLUDES THE FOLLOWING INTERSTATES... THE PENNSYLVANIA
TURNPIKE FROM MILE MARKERS 222 TO 272. INTERSTATE 78 FROM MILE
MARKERS 0 TO 8. INTERSTATE 81 FROM MILE MARKERS 44 TO 139.
INTERSTATE 83 FROM MILE MARKERS 16 TO 50. INTERSTATE 283 FROM MILE
MARKERS 0 TO 2.

A RAPID DROP IN TEMPERATURES MAY LEAD TO THE RAPID FORMATION OF
BLACK ICE ON AREA ROADWAYS. BLACK ICE IS NEARLY IMPOSSIBLE TO SEE
AND ROADWAYS MAY APPEAR WET. PLEASE USE EXTREME CAUTION...ESPECIALLY
ON BRIDGES...OVERPASSES AND AROUND CURVES. ALLOW PLENTY OF STOPPING
DISTANCE AND AVOID BRAKING SUDDENLY.

LAT...LON 4054 7618 4049 7644 4038 7626 3994 7647
      3992 7737 4059 7706 4064 7695 4064 7700
      4087 7693 4088 7680 4096 7688 4132 7666
      4131 7660 4156 7651 4154 7622 4121 7632
      4114 7623 4095 7621 4091 7600
TIME...MOT...LOC 2330Z 256DEG 36KT 4137 7651 4088 7680 3998 7722

DANGELO