Periods of freezing rain resulted in minor to moderate ice accretion over the North Central Mountains of Central Pennsylvania. The freezing rain began late on the 2nd and continued into the early morning hours on the 3rd.
Every event with a place to put it; 6 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS CTP wrote it up.
Periods of freezing rain resulted in minor to moderate ice accretion over the North Central Mountains of Central Pennsylvania. The freezing rain began late on the 2nd and continued into the early morning hours on the 3rd. The overall impact from the ice accretion was minimal, given the time of occurrence (very late at night). In addition, the ice that did build-up on lines and trees quickly melted as temperatures increased overnight and precipitation changed to plain rain. While there were a few reports of power outages, none of them could be directly attributed to the freezing rain.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS State College, PA wrote its last area forecast discussion before the first event at Dec 1, 10:14 PM EST, 2 hours 46 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 1014 PM EST SAT DEC 1 2007 .SYNOPSIS... A STORM SYSTEM MOVING OUT OF THE LEE OF THE ROCKIES EARLY THIS EVENING...WILL HEAD THROUGH THE LOWER GREAT LAKES SUNDAY AND SUNDAY NIGHT. THIS WILL RESULT IN AN AREA OF LIGHT TO MODERATE SNOW DEVELOPING ACROSS THE REGION TONIGHT INTO EARLY SUNDAY...BEFORE TRANSITIONING INTO A WINTRY MIX AND EVEN PLAIN RAIN IN SOME LOCATIONS DURING THE DAY SUNDAY AS ABOVE FREEZING AIR STREAMS IN FROM THE SOUTHWEST SEVERAL THOUSAND FEET ABOVE GROUND LEVEL. MUCH COLDER AIR WILL RETURN TO THE COMMONWEALTH LATE SUNDAY NIGHT AND MONDAY ON THE BACKSIDE OF THE DEPARTING STORM SYSTEM...WITH POTENTIALLY SIGNIFICANT LAKE EFFECT SNOWS DEVELOPING ACROSS THE NORTHWESTERN MOUNTAINS AND THE LAUREL HIGHLANDS MONDAY AND MONDAY NIGHT. LIGHTER SNOW SHOWERS AND FLURRIES WILL BE COMMON OVER THE REMAINDER OF CENTRAL AND NORTH CENTRAL PA. MUCH OF EARLY NEXT WEEK WILL BE DOMINATED BY BELOW NORMAL TEMPERATURES AND WINDY CONDITIONS. COLD NORTHWEST FLOW WILL CONTINUE ACROSS THE REGION INTO THE MIDDLE OF NEXT WEEK WITH A CLIPPER SYSTEM FORECAST TO AFFECT THE REGION WEDNESDAY INTO THURSDAY. && .NEAR TERM /THROUGH SUNDAY/... SNOW IS FINALLY WORKING DOWN THROUGH THE DRY AIR WITH THE FIRST OBSERVATIONS SHOWING PRECIP REACHING THE GROUND IN FAR WESTERN PA. VAD WINDS SHOW PRECIP LOWERING TO ABOUT 4000 LAST OBSERVATION...SO WE HAVE ANOTHER 1-3 HOURS OF DRY WX LOCALLY BEFORE LIGHT SNOW DEVELOPS. STRONGEST 850-700MB FGEN WILL BE ALONG BAROCLINIC ZONE OVR NORTHERN PA OVERNIGHT....THUS WILL GO WITH CATEGORICAL SNOW OVER THE NORTHERN MTNS. FURTHER SOUTH...CHANCE OF MEASURABLE SNOW DECREASES AND WILL LIKELY BE MIXED WITH SLEET...AS DRAMATIC WARMING IN THE 700 TO 850 MB LAYER IS SEEN BY 12Z SUN. CONTINUED WARMING ALOFT WILL CAUSE SLEET TO TRANSITION TO FZRA ACROSS THE SW PORTION OF THE CWA...AND FROM SNOW TO SLEET OVER THE NORTHEAST. BASED ON LATEST SREF AND HPC FCST...TOTAL SNOW ACCUMULATIONS BY 18Z WILL MOST LIKELY RANGE FROM UP TO 4 INCHES ACROSS THE NORTHERN MTNS...TO NEAR ZERO ALONG THE MARYLAND BORDER. PRECIP LIKELY TO BECOME SPOTTY DURING THE AFTN AND EARLY EVENING...AS INITIAL LL JET PUSHES EAST. HOWEVER...LIGHT RAIN WILL CONTINUE TO FALL INTO RESIDUAL COLD AIR AT THE SFC. LATEST SREF 2M TEMPS SUGGEST POCKETS OF FZRA OR DRIZZLE COULD PERSIST FROM UNV NORTH AND EASTWARD UNTIL WELL INTO THE EVENING. && .SHORT TERM /SUNDAY NIGHT THROUGH MONDAY/... BELIEVE THIS STORM WILL FALL IN THE ADVISORY CATEGORY FOR MOST...IF NOT ALL OF THE REGION. LATEST SREF PLUME DATA SUGGESTS HEAVY SNOW VERY UNLIKELY...WHICH IS EXPECTED BASED ON STORM TRACK TO OUR WEST. HOWEVER...CAN NOT RULE OUT POSSIBILITY OF A SIG ACCUM OF FREEZING RAIN ACROSS THE HIGHER TERRAIN OF NORTHEAST PA LATE SUNDAY. SEVERAL SREF MEMBERS KEEP SFC TEMPS IN THIS REGION BLW 0C THRU 06Z MONDAY. THIS WILL BE OF GREATEST CONCERN LATE SUN EVENING...WHEN HEAVIER PRECIP LIKELY TO REDEVELOP AHEAD OF APPROACHING UPPER LVL WAVE. CONFIDENCE IS NOT HIGH ENOUGH TO ISSUE A WARNING...BUT COULD POTENTIALLY UPGRADE. ELSEWHERE...PRECIP WILL LIKELY HAVE TURNED TO PLAIN RAIN BY EARLY EVENING HAVE ADDED CHC OF THUNDER TO ENTIRE AREA SUN NITE BASED ON LATEST SPC GUIDANCE. MODEL DATA INDICATES MARGINAL INSTABILITY ABV 900MB AND SIG LARGE SCALE LIFT IN ADVANCE OF APPROACHING COLD FRONT. COLD FRONT WILL SWEEP THRU THE AREA DURING THE PREDAWN HOURS MON MORNING...FOLLOWED BY STRONG COLD ADVECTION AND WIND GUSTS LIKELY EXCEEDING 30 MPH. WSW BLYR FLOW SHOULD CONFINE SIG LAKE EFFECT SNOW SHOWERS TO SNOW BELT OF NW PA...WHERE SEVERAL INCHES SEEM PROBABLE BY LATE MONDAY. 850 WIND FIELDS SUGGEST A VERY BLUSTERY DAY MONDAY. WILL KEEP WSPDS AND GUSTS JUST BLW ADVISORY CRITERIA FOR NOW. && .LONG TERM /MONDAY NIGHT THROUGH SATURDAY/... HIGH IMPACT WEATHER FEATURES FOR THIS PERIODS INCLUDE: 1. POTENTIAL FOR SIGNIFICANT LAKE EFFECT SNOWFALL ACROSS THE NORTHWEST MOUNTAINS AND LAUREL HIGHLANDS MONDAY NIGHT INTO TUESDAY ON THE BACKSIDE OF 500MB HEIGHT FALL CENTER/DEEPENING SFC LOW OVER THE CANADIAN MARITIMES. 2. A MEAN ERN NOAM LW TROF WILL RESULT IN MUCH BELOW NORMAL TEMPERATURES MONDAY THRU THURSDAY /DEC 3-6/ WITH 500MB HEIGHTS AND 850MB TEMPERATURES -1 TO -3 STD BLW NORMAL. 3. CLIPPER LOW DIVING SEWD THRU THE MID MS/OH VLY AND ALONG/SOUTH OF THE MASON DIXON MAY BRING A BAND OF SNOW TO THE AREA WED-THUR. DETAILS... COLD AND BLUSTERY CONDS WILL BE FOUND ACROSS THE COMMONWEALTH MONDAY NIGHT GIVEN TIGHT PRES GRAD ON THE BACKSIDE OF THE DEEPENING SECONDARY LOW PRES SYS MOVG NEWD INTO THE CANADIAN MARITIMES. A PROLONGED...COLD NWLY OVER-LAKE FETCH MAY RESULT IN MOD TO HVY SNFL AMTS OVER PORTIONS OF THE WESTERN HIGH TERRAIN /NAMELY THE NW SNOWBELT AND LAUREL HIGHLANDS/. BOTH GFS/NAM IN AGREEMENT IN DEPICTING THIS SCENARIO...AND HAVE BOOSTED POPS INTO THE LKLY/CATEGORICAL RANGE USING A MOS/SREF BLEND. 12KM NAM ALSO SHOWING POTENTIAL FOR A HURON CONNECTION SETTING UP INTO TUESDAY...FURTHER ENHANCING LOCAL SNOWFALL TOTALS ACROSS THE WINDWARD FACING SLOPES OF THE SW MTNS. LATER SHIFTS MAY NEED TO HOIST SOME LAKE EFFECT/SNOW HEADLINES. LE SHSN SHOULD BEGIN TO WANE BY EARLY WED AS FLOW WEAKENS AND BACKS IN RESPONSE TO AN APPROACHING CLIPPER LOW DIVING SEWD THRU NRN PLAINS AND INTO THE OH VLY/WV PNHNDL. MDLS GRADUALLY CONVERGING ON AFOREMENTIONED SFC LOW TRACK...WITH CONDS COLD ENUF FOR A BAND OF SNOW ALONG/NORTH OF THE EVENTUAL TRACK. AT FIRST GLANCE...EVOLUTION OF THIS SYS LOOKS SOMEWHAT LIKE THE 18 NOV EVENT...BUT STILL WAY TOO FAR OUT TO GET SPECIFIC. SFC HI PRES IS FCST TO BUILD INTO THE AREA IN THE WAKE OF THE CLIPPER WITH LE SNOW SHOWERS DEVELOPING ACROSS THE WESTERN HIGH TERRAIN INTO THE EARLY PART OF THE WKEND. AS THE SFC HI MOVES OFF THE MID-ATLANTIC COAST...FLOW PATTERN APPEARS TO TRANSITION FROM A MEAN ERN TROF TO MORE OF A PROGRESSIVE/ZONAL FLOW BY EARLY IN THE WEEKEND. THIS SHOULD TRANSLATE INTO A MODERATION IN TEMPS BACK TOWARD MORE SEASONABLE READINGS. GENERALLY FOLLOWED A 50/50 BLEND OF HPC AND GMOS FOR TEMPS DY3 NGT THRU DY8. LEANED MORE TOWARD HPC POPS WITH THE CLIPPER LOW...WHICH WERE SLIGHTLY HIGHER THAN THE GMOS. && .AVIATION /03Z SUNDAY THROUGH THURSDAY/... MID LEVEL CLOUD DECK BASE WILL STEADILY LOWER FROM WEST TO EAST EARLY TONIGHT. CEILINGS AND VSBYS WILL FALL INTO THE MVFR RANGE AS SNOW BEGINS ALONG AND TO THE NORTH OF A WARM FRONT...ACROSS THE WEST BETWEEN 02Z AND 04Z...AND OVER THE SUSQ VALLEY WITHIN A FEW HOURS AFTER MIDNIGHT. XPECT IFR CONDS TO DEVELOP WITH THIS INITIAL SHOT OF SNOW WITHIN 1 TO 3 HOURS AFTER ITS ONSET. BY EARLY SUNDAY MORNING...MILDER AIR FROM THE SOUTHWEST WILL OVERRUN THE COLD LLVL AIRMASS ENTRENCHED ACROSS THE REGION. THIS WILL EFFECTIVELY CAUSE A TRANSITION IN PRECIPITATION TYPE FROM SNOW...TO SLEET AND FREEZING RAIN TOWARD EARLY SUNDAY AFTERNOON WITH MVFR/IFR VISBYS AND CIGS ANTICIPATED. INCREASING DIRECTIONAL AND VERTICAL SPEED SHEAR IN THE LOWEST FEW KFT ABOVE GROUND SUNDAY AND SUNDAY EVENING WILL LIKELY CREATE FAVORABLE CONDITIONS FOR LOW LEVEL WIND SHEAR AT ALL TAF SITES. XPECT TO SEE LLWS INCLUDED IN THE 00Z PACKAGE. LOW PRESSURE WILL MOVE BY JUST TO THE NORTH OF THE REGION SUNDAY NIGHT...WITH SECONDARY LOW DEVELOPMENT NEAR THE NEW JERSEY COAST. FREEZING RAIN AND RAIN ALONG AND AHEAD OF ITS SOUTHWARD TRAILING COLD FRONT WILL CONTINUE THROUGH EARLY SUNDAY NIGHT...WITH EVEN A RUMBLES OF THUNDER POSSIBLE ACROSS THE SOUTHERN TIER OF PENN WHERE ELEVATED INSTABILITY WILL COMBINE WITH THE DEEPEST MOISTURE PLUME WINDY AND COLDER CONDITIONS WILL OCCUR MONDAY INTO TUESDAY...RESULTING IN AREAS OF SIGNIFICANT LAKE EFFECT/OROGRAPHIC SNOWS ACROSS THE NW MTNS AND LAUREL HIGHLANDS. IFR CONDS ALMOST A GIVEN AT JST/BFD WITH MVFR CONDS LIKELY ACROSS THE CENTRAL MTNS. LOOK FOR SUSTAINED 15-25MPH WITH GUSTS IN THE 30-40KT RANGE. FLURRIES AND SCATTERED SNOW SHOWERS WILL FLY ACROSS THE CENTRAL AND SE. ANOTHER...ALBEIT SOMEWHAT WEAKER STORM SYSTEM MOVING SOUTHEAST FROM CANADA DURING THE MIDWEEK WILL BRING PERIODS OF MVFR TO IFR CIGS AND VSBYS IN SNOW/SNOW SHOWERS WED/THUR. && .CTP WATCHES/WARNINGS/ADVISORIES... WINTER WEATHER ADVISORY UNTIL 1 AM EST MONDAY FOR PAZ006-012- 018-019-037-041-042-045-046-049>053-058. WINTER WEATHER ADVISORY UNTIL 7 PM EST SUNDAY FOR PAZ004-005- 010-011-017. WINTER WEATHER ADVISORY FROM 4 AM TO 7 PM EST SUNDAY FOR PAZ024>028-033>036-056-057-059-063>066. && SYNOPSIS...LACORTE/STEINBUGL NEAR TERM...LACORTE/FITZGERALD SHORT TERM...LACORTE/FITZGERALD LONG TERM...STEINBUGL AVIATION...LAMBERT/STEINBUGL
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 711 PM EST SAT DEC 1 2007 PAZ024>028-033>036-056-057-059-063>066-030015- CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN-JUNIATA-SOMERSET-BEDFORD-FULTON- FRANKLIN-PERRY-DAUPHIN-LEBANON-CUMBERLAND-ADAMS-YORK-LANCASTER- 711 PM EST SAT DEC 1 2007 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 AM TO 7 PM EST SUNDAY... 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...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. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. PAZ004-005-010-011-017-030015- WARREN-MCKEAN-ELK-CAMERON-CLEARFIELD- 711 PM EST SAT DEC 1 2007 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 7 PM EST SUNDAY... 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...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. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. PAZ006-012-018-019-037-041-042-045-046-049>053-058-030015- POTTER-NORTHERN CLINTON-NORTHERN CENTRE-SOUTHERN CENTRE-TIOGA- NORTHERN LYCOMING-SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION- SNYDER-MONTOUR-NORTHUMBERLAND-COLUMBIA-SCHUYLKILL- 711 PM EST SAT DEC 1 2007 ...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 1 AM EST MONDAY... 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...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. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED.
The national radar mosaic for the moment the first event began.
6 ice storm. Local standard time, as filed.
The Bradford Regional Airport ASOS (KBFD) reported just over a quarter inch of freezing rain.
COOP Observer in Renovo reported approximately three tenths of an inch of freezing rain.
Ice accretions across Lycoming County were approximately one quarter inch.
Potter county emergency management reported ice accretion on lines and trees. Tri-County Rural Electric Cooperative, which serves the Coudersport area, reported three power outages that may have resulted from the ice build-up.
Sullivan County emergency management reported patchy ice accretion on local roads, which lead to one person losing control of their vehicle and sliding off the road. There were no injuries. A Lycoming county employee who lives in Eagle's Mere (Sullivan County) reported one quarter inch of ice accretion on his vehicle.
Tioga County emergency management reported ice accretion on lines and trees.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2007Every state in 2007This day in weather historyWarnings in Pennsylvania, December 2007
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 65800, 65801, 65805, 65806, 65808, 65809.