Special Weather Statement, NWS State College, PA

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE STATE COLLEGE PA
813 PM EST MON JAN 2 2012

.SYNOPSIS...
THE COLDEST AIR SO FAR THIS SEASON WILL CONTINUE TO SWEEP ACROSS
THE EASTERN GREAT LAKES AND INTO PENNSYLVANIA THROUGH
WEDNESDAY. SCATTERED TO NUMEROUS LAKE EFFECT SNOW SHOWERS AND A
FEW HEAVIER SQUALLS WILL OCCUR ACROSS THE NORTHWEST MOUNTAINS AND
LAUREL HIGHLANDS. SNOW SHOWERS OF LESSER INTENSITY WILL REACH INTO
THE NORTHERN...CENTRAL AND SOUTH CENTRAL MOUNTAINS AS WELL. A
BRIEF WARM UP IS EXPECTED LATER THIS WEEK BEFORE ANOTHER SURGE OF
COLD AIR APPROACHES LATE NEXT WEEKEND. THE COLD AIR...WESTERLY
FLOW AND WARM LAKES COULD PRODUCE MORE LAKE EFFECT SNOW ACROSS
WESTERN PENNSYLVANIA LATE MONDAY INTO TUESDAY.

&&

.NEAR TERM /UNTIL 7 AM TUESDAY MORNING/...
HEAVY SNOW FALLING OUT OF THE SQUALLS...AND QUICK ACCUMULATIONS
NOW THAT THE SUN HAS GONE DOWN. REPORTS FROM PENN DOT AND LOCAL
LAW ENFORCEMENT ARE FORTHCOMING.

SNOW SQUALLS W-E ACROSS THE SRN TWO-THIRDS OF THE AREA AS CYCLONIC
FLOW STILL DOMINATES THERE. HOWEVER...THE BETTER-ALIGNED NWRLY
WINDS ARE NOW STARTING TO APPEAR OVER THE LAKE AND INTO NWRN PA.
THIS SHOULD TURN THE SNOW BANDS TO MOSTLY NW-SE. WITH A SHORT
FETCH...THE HEAVIEST SNOW SHOULD BE FAIRLY CLOSE TO THE LAKE...AND
WILL KEEP THE WARNING IN PLACE. ALSO...A BIT OF A HURON
CONNECTIONS IS BEGINNING AND IS FORECAST TO BECOME STRONGER/BETTER
OVERNIGHT AS A STRONG S/WV PUSHES ACROSS LK HURON AND WRN LK ERIE
LATER TONIGHT. MOST MDL FCST PUT THE BEST LLVL INSTAB AND LIFT IN
A WIDE CHANNEL FROM KCLE TO N OF KPIT TO KJST. IN THE PVA AHEAD
OF THE WAVE...THE LIFT WILL BE MAXIMIZED. THEREFORE...THE MOST-
INTENSE SNOW SHOULD OCCUR AFTER MIDNIGHT AND INTO THE FIRST PART
OF TUES.

TONIGHT AND TUESDAY WILL FEATURE THE COLDEST CONDITIONS OF THE
WINTER SO FAR AS ARCTIC AIR CONTINUES TO SPREAD SOUTHEASTWARD
ACROSS THE EASTERN GREAT LAKES. BY 12Z TUE...-20C 850 MB AIR WILL
BE POISED TO ENTER NORTHWEST PA. WINDS WILL BE LESS INTENSE THAN
THOSE FROM SUNDAY NIGHT AND MONDAY MORNING...BUT BRISK CONDITIONS
WILL PERSIST THROUGHOUT. WIND CHILLS WILL GO SLIGHTLY BELOW ZERO
FOR AT LEAST THE NRN MTS.

HAVE ADDED ABOUT ANOTHER INCH OR SO TO THE FCST. WITH THE
EFFICIENCY OF THE CURRENT ACCUMULATIONS TAKEN INTO ACCOUNT AND THE
EXPECTED INTENSIFICATION OF THE SNOW OVERNIGHT AND THE WINDS WHICH
ARE STILL GUSTY...HAVE EXPANDED THE WINT WX ADVY INTO THE NEXT
TIER OF COS INCL POTTER...ELK CAMERON AND CLEARFIELD. THE TOTALS
DO LOOK A LITTLE INFLATED IN THE LAURELS...SO WILL CONSIDER
UPPING THEM TO A WARNING IN THE NEAR FUTURE.

NEAR TERM WIND CHILLS WILL DIP BELOW ZERO IN SPOTS. NOT ADVY
WORTHY BUT NOTEWORTHY VS OUR RECENT TEMPS.

&&

.SHORT TERM /7 AM TUESDAY MORNING THROUGH WEDNESDAY/...
LAKE EFFECT SNOW CONTINUES. HAVE CHOSEN TO END THE ADVY IN THE
NEW SECTIONS A LITTLE EARLIER THAN THE OTHER FLAGS - AS THE
FORCING DOES NOT LOOK AS STRONG THERE AFTER LATE MORNING. THE
FETCH WILL BE SHORT AND THE INVERSION LOWERING. WILL KEEP ALL
OTHER FLAGS AS IS AND UP TOTAL AMOUNTS JUST A LITTLE THERE AS
WELL.

HIGH TEMPERATURES SHOULD STAY BELOW FREEZING AND MAY NOT GET OUT
OF THE TEENS IN PORTIONS OF THE WESTERN MOUNTAINS. 4KM SPC WRF AND
LCL HRR INDICATE GOOD LAKE HURON AND EVEN LAKE MICHIGAN CONNECTION
AT TIMES BETWEEN 00Z TUE AND 18Z TUE. THE COLD AIR COMBINED WITH
THE FLOW WILL PRODUCE OROGRAPHIC SNOW AREAS OF THE LAURELS ACTIVE
AND NORTHWESTERN AREAS ACTIVE WITH SNOW SHOWERS INTO TUESDAY
AFTERNOON. THE INVERSION WILL CONTINUE TO LOWER AND EVENTUALLY THE
FLOW BECOMES VERY UNFAVORABLE TUES EVENING. WILL HARDLY MENTION A
FLURRY PAST 00Z WED.

NEXT SYSTEM CLIPS IN LATE IN THE DAY WED...BUT CHC/SCT POPS ON
ORDER FOR NOW IN THE N/W AS IT MAY SKIRT US TO THE N.

&&

.LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/...
NOT A LOT OF CHANGE ON THE PACKAGE.

DID UP POPS SOME WED NIGHT...MAIN COLD CORE STAYS NORTH OF LOWER
LAKES...BUT NW FLOW OVER LAKES THAT ARE MUCH WARMER THAN NORMAL...
ABOUT 5 TO 10 DEGRES...AND UPSLOPE FLOW...MAY RESULT IN A FEW
FLURRIES...AND LIGHT SNOW SHOWERS WED NIGHT.

WENT WITH DRY FCST AFTER THIS...AS PA IS MAINLY BETWEEN NORTHERN
AND SOUTHERN WEATHER SYSTEMS.

A MODERATING TREND FOR THE WEEKEND.

&&

.AVIATION /01Z TUESDAY THROUGH SATURDAY/...
GUSTY WINDS CONTINUE TO DIMINISH HOWEVER THEY WILL REMAIN
PREVALENT ALONG THE ELEVATED REGIONS IN THE NW MTNS AND THE LAUREL
HIGHLANDS. . NUMEROUS LAKE EFFECT SNOW SHOWERS WILL CONTINUE
ACROSS THE NW MTNS /KBFD/ AND UPSLOPE SNOWS IN THE LAUREL
HIGHLANDS /KJST/ AND AT TIMES AOO. THERE IS A STRONG MULTI LAKE
CONNECTION THROUGH CAMBRIA COUNTY. A PROLONGED PERIOD OF MVFR-IFR
CIGS IS IN STORE FOR THESE AREAS...WITH SNOW SHOWER ACTIVITY
CONTINUING OVERNIGHT - BRINGING OCNL PERIODS OF IFR VSBY/CIGS TO
HIGHER TERRAIN OF THE N AND W. CENTRAL MTNS MAY SEE ISOLATED
IMPINGEMENT'S FROM SNOW BANDS...WHICH COULD LEAD TO SHORT- LIVED
MVFR CONDITIONS...MAINLY TONIGHT. THE SUSQ VALLEY WILL REMAIN VFR
THROUGH THE TAF PERIOD.

OUTLOOK...
TUE...OCNL MVFR IN -SN NW. OTHERWISE PRIMARILY VFR WITH ISOLD
MVFR IN -SHSN.
WED-SAT...PRIMARILY VFR.

&&

.CTP WATCHES/WARNINGS/ADVISORIES...
LAKE EFFECT SNOW WARNING UNTIL 7 PM EST TUESDAY FOR PAZ004-005.
WINTER WEATHER ADVISORY UNTIL NOON EST TUESDAY FOR PAZ006-010-
011-017.
WINTER WEATHER ADVISORY UNTIL 7 PM EST TUESDAY FOR PAZ024-033.

&&

SYNOPSIS...DANGELO
NEAR TERM...DANGELO
SHORT TERM...DANGELO/DEVOIR
LONG TERM...GRUMM/MARTIN
AVIATION...DEVOIR/CERU

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE STATE COLLEGE PA
753 PM EST MON JAN 2 2012

PAZ012-018-019-025>028-034-035-037-041-042-045-046-049>053-040100-
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-
753 PM EST MON JAN 2 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TONIGHT.

NUMEROUS LAKE EFFECT SNOW SHOWERS ARE EXPECTED THROUGH THE NIGHT.
VISIBILITIES CAN DROP SHARPLY IN HEAVIER SNOW SQUALLS...AND
CONDITIONS ON UNTREATED ROADS MAY QUICKLY DETERIORATE.
SNOW ACCUMULATIONS WILL BE MINOR BUT THE INTENSITY OF THE SNOW
MAY CREATE LOCAL PROBLEMS ON AREA ROADS. USE EXTRA CAUTION WHEN
DRIVING THROUGH A SNOW SQUALL.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

ADDITIONAL SNOW SHOWERS WILL PRODUCE LOW VISIBILITIES AT TIMES AND
COULD CREATE ROAD HAZARDS ON TUESDAY...MAINLY IN THE MORNING.
HOWEVER...ACCUMULATIONS WILL BE VERY MINOR. NO OTHER HAZARDOUS
WEATHER IS EXPECTED THROUGH SUNDAY.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER
CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.

PAZ006-010-011-017-040100-
POTTER-ELK-CAMERON-CLEARFIELD-
753 PM EST MON JAN 2 2012

...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON EST TUESDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...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.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

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.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SNOWFALL WHEN THEY REACH
A TOTAL OF 3 INCHES...SIX INCHES AND THEN A STORM TOTAL AS THE
STORM ENDS.

PAZ024-033-040100-
CAMBRIA-SOMERSET-
753 PM EST MON JAN 2 2012

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 PM EST TUESDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...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.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

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.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SNOWFALL WHEN THEY REACH
A TOTAL OF 3 INCHES...SIX INCHES AND THEN A STORM TOTAL AS THE
STORM ENDS.

PAZ004-005-040100-
WARREN-MCKEAN-
753 PM EST MON JAN 2 2012

...LAKE EFFECT SNOW WARNING IN EFFECT UNTIL 7 PM EST TUESDAY...

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TONIGHT.

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

   LAKE EFFECT SNOW WARNING.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

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

   LAKE EFFECT SNOW WARNING.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SNOWFALL WHEN THEY REACH
A TOTAL OF 3 INCHES...SIX INCHES AND THEN A STORM TOTAL AS THE
STORM ENDS.

PAZ036-056>059-063>066-040100-
FRANKLIN-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-ADAMS-YORK-
LANCASTER-
753 PM EST MON JAN 2 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA.

.DAY ONE...TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

WEATHER SPOTTER ACTIVATION IS NOT ANTICIPATED.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
602 PM EST MON JAN 2 2012

PAZ017>019-045-022330-
CLEARFIELD PA-NORTHERN CENTRE PA-SOUTHERN CENTRE PA-
SOUTHERN CLINTON PA-
602 PM EST MON JAN 2 2012

...SNOW SQUALLS WILL AFFECT CENTRAL CENTRE...NORTHERN CLEARFIELD AND
SOUTHERN CLINTON COUNTIES...

AN AREA OF SNOW SQUALLS ALONG INTERSTATE 80 FROM CLEARFIELD TO LAMAR
WILL DROP SLOWLY TO THE SOUTH THROUGH 7 PM. THIS WILL KEEP THE SNOW
FALLING OVER I 80 FOR MOST OF THAT TIME.

SEVERAL ACCIDENTS HAVE ALREADY OCCURRED TODAY. DRIVERS SHOULD KEEP
AWARE THAT THERE WILL BE QUICK REDUCTIONS IN VISIBILITY WHEN DRIVING
THROUGH SNOW SQUALLS. THE ROADS CAN ALSO BECOME SLICK OR ICY IF NOT
TREATED RECENTLY. DRIVERS SHOULD USE EXTRA CAUTION WHEN DRIVING IN
SNOW.

WIND GUSTS TO 30 MPH ARE POSSIBLE WITH THESE SNOW SQUALLS. THE SNOW
WILL RAPIDLY DROP VISIBILITIES IN THESE SNOW SQUALLS TO LESS THAN A
QUARTER OF A MILE.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...
I-80 BETWEEN MILE MARKERS 97 AND 171...I-99 BETWEEN MILE MARKERS 76
AND 85.

LAT...LON 4120 7878 4121 7876 4121 7869 4122 7865
      4123 7865 4100 7739 4079 7763 4108 7881
      4113 7881

FORECASTER: DANGELO

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
646 PM EST MON JAN 2 2012

PAZ024-025-030030-
BLAIR PA-CAMBRIA PA-
646 PM EST MON JAN 2 2012

...A SNOW SQUALL WILL AFFECT CENTRAL CAMBRIA AND SOUTHERN BLAIR
COUNTIES...

AT 641 PM EST...A SNOW SQUALL WAS LAYING WEST TO EAST ALONG ROUTE 22
IN CENTRAL CAMBRIA COUNTY AND INTO SOUTHERN BLAIR COUNTY JUST TO THE
SOUTH OF ALTOONA. THE SQUALL WILL MOVE SLOWLY TO THE SOUTH AND WILL
RAPIDLY DROP VISIBILITIES TO LESS THAN A QUARTER OF A MILE. THERE
WILL BE A QUICK INCH OR SO OF SNOW WHICH WILL ALSO MAKE DRIVING
HAZARDOUS...ESPECIALLY ON CRESSON MOUNTAIN.

THIS WILL IMPACT I-99 BETWEEN MILE MARKERS 18 AND 31. THIS SQUALL
WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 22 FROM THE
INDIANA COUNTY LINE TO EAST OF HOLLIDAYSBURG...AND ROUTE 219 FROM
NEAR SOUTH FORK TO NEAR EBENSBURG.

BE ESPECIALLY CAUTIOUS IF YOU MUST TRAVEL INTO OR THROUGH THIS
POTENTIALLY DANGEROUS SNOW SQUALL.

LAT...LON 4057 7887 4043 7817 4025 7829 4027 7835
      4030 7843 4029 7844 4041 7897

FORECASTER: DANGELO

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
730 PM EST MON JAN 2 2012

PAZ017-024>027-034>036-056-063-030100-
BEDFORD PA-BLAIR PA-CAMBRIA PA-CLEARFIELD PA-CUMBERLAND PA-
FRANKLIN PA-FULTON PA-HUNTINGDON PA-MIFFLIN PA-PERRY PA-
730 PM EST MON JAN 2 2012

...A SNOW SQUALL WILL AFFECT BLAIR...CAMBRIA...NORTHEASTERN
BEDFORD...NORTHEASTERN FULTON...NORTHERN FRANKLIN...SOUTHERN
HUNTINGDON...SOUTHWESTERN CLEARFIELD...SOUTHWESTERN MIFFLIN...
SOUTHWESTERN PERRY AND WEST CENTRAL CUMBERLAND COUNTIES...

AT 724 PM EST...A SNOW SQUALL WAS NEAR MARTINSBURG...MOVING SOUTHEAST
AT 30 MPH.

WIND GUSTS TO 30 MPH ARE POSSIBLE WITH THIS SNOW SQUALL. THIS SNOW
SQUALL WILL AFFECT SHY BEAVER...BROAD TOP CITY AND SALTILLO.

THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 182 AND 212...I-81 BETWEEN
MILE MARKERS 22 AND 31...I-99 BETWEEN MILE MARKERS 14 AND 46.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 11...ROUTE
22...ROUTE 22/522...ROUTE 219...ROUTE 220...ROUTE 422...ROUTE 522...
STATE ROAD 453.

BE ESPECIALLY CAUTIOUS IF YOU MUST TRAVEL INTO OR THROUGH THIS
POTENTIALLY DANGEROUS SNOW SQUALL.

LAT...LON 4041 7897 4072 7881 4094 7881 4038 7775
      4027 7770 4032 7764 4015 7734 3996 7760

FORECASTER: CERU

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
937 PM EST MON JAN 2 2012

PAZ012-019-045-046-049-052-030330-
NORTHERN CLINTON PA-NORTHUMBERLAND PA-SOUTHERN CENTRE PA-
SOUTHERN CLINTON PA-SOUTHERN LYCOMING PA-UNION PA-
937 PM EST MON JAN 2 2012

...A SNOW SQUALL WILL AFFECT CLINTON...EAST CENTRAL CENTRE...
NORTHWESTERN NORTHUMBERLAND...SOUTH CENTRAL LYCOMING AND UNION
COUNTIES...

AT 935 PM EST...A SNOW SQUALL WAS NEAR GLEN UNION...MOVING SOUTHEAST
AT 35 MPH.

THIS SNOW SQUALL WILL AFFECT MCELHATTAN...AVIS...CARROLL...SPRUCE RUN
RESERVOIR AND VICKSBURG.

THIS WILL IMPACT I-80 BETWEEN MILE MARKERS 177 AND 216.

THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...STATE HIGHWAY
147...ROUTE 15...ROUTE 220...STATE ROAD 45...STATE ROAD 120.

BE ESPECIALLY CAUTIOUS IF YOU MUST TRAVEL INTO OR THROUGH THIS
POTENTIALLY DANGEROUS SNOW SQUALL.

LAT...LON 4129 7743 4122 7734 4123 7729 4103 7676
      4099 7678 4089 7692 4087 7701 4086 7702
      4087 7708 4127 7794 4140 7773

FORECASTER: CERU