A major winter storm affected central Pennsylvania from the early morning hours of February 13th through the late afternoon of the 14th. In addition to at least 6 inches of snow, significant accumulations of sleet and ice were also noted.
Every event with a place to put it; 25 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.
A major winter storm affected central Pennsylvania from the early morning hours of February 13th through the late afternoon of the 14th. In addition to at least 6 inches of snow, significant accumulations of sleet and ice were also noted.
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 Feb 12, 9:44 PM EST, 5 hours 16 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 944 PM EST MON FEB 12 2007 .SHORT TERM /REST OF TONIGHT/... FIRST WIDESPREAD WINTER STORM STILL POISED TO MOVE OVER THE REGION TUESDAY AND NOT WIND DOWN UNTIL DURING THE DAY WEDNESDAY. AT 00Z THE STORM WAS EXITING THE TX PANHANDLE REGION AND HEADING EAST INTO AN INCREASINGLY WARM MOIST AIRMASS. DEWPOINTS IN THE LOW-MID 60S WERE ALREADY FUELING DEEP CONVECTION FROM THE LOUISIANA GULF COAST NORTH TO ARKANSAS. A LARGE DEFORMATION BAND OF MIXED RAIN AND SNOW EXTENDED EAST-WEST FROM KANSAS TO SOUTHERN WV. LOCALLY THE ARCTIC BOUNDARY IS GETTING ABSORBED IN THE LOW LEVEL FLOW AND WILL RESULT IN JUST A SLOW STEADY DECREASE IN THE TEMPS OVERNIGHT. THE MAIN BAROCLINIC BOUNDARY WILL STAY TO OUR SOUTH THRU TUES AS THE STORM IN TX HEADS EAST. IN TIME THE MODELS AGREE IN ERODING STABILITY ALONG THE MID ATL COAST...NEAR THE CAROLINA COAST. THIS WILL BE THE BREEDING GROUND FOR A NEW LOW AS THE PRIMARY HEADS INTO AND TRIES TO PENETRATE THE COLD STABLE AIR IN PLACE OVER THE NORTHEAST. RAPID CYCLOGENESIS WILL THEN TAKE PLACE AND THE LOW WILL BOMB OUT AS IT HEADS UP TOWARD CAPE COD. TUESDAY SHUD SEE LOWERING CLOUDS AND LIGHT SNOWS DEVELOP IN THE EAST-WEST AREA OF STRENGTHENING FRONTOGENETIC FORCING NORTH OF THE FRONT. AS THE STORM NEARS LATER IN THE DAY..INCREASING WARM ADVECTION WILL ALLOW SNOW TO INTENSIFY WITH MOST OF THE HEAVY PRECIP EXPECTED IN THE 8-12 HOURS OR SO AFTER ABOUT 00Z. THIS IS ALSO WHEN THE GUIDANCE IS CONSISTENT IN BRINGING IN THE CHANCE OF A MIX OR CHANGE OVER TO SLEET OVER PERHAPS AS MUCH AS THE SOUTHERN HALF OF THE FCST AREA. 21Z SREF AND 18Z MREF PLUMES SHOW ALL AREAS SOUTH AND EAST OF BRADFORD WITH AT LEAST SEVERAL MEMBERS POINTING TWD AT LEAST A FEW HOURS OF A SLEET MIX. FAR SERN ZONES ARE THE MOST VULNERABLE. FOR SNOW LOVERS...NEW NAM RUN SOUNDINGS SHOW AREA FROM STATE COLLEGE NORTH AND WEST STAYING BELOW ZERO THROUGHOUT THE STORM MINIMIZING THE THREAT FOR SLEET KEEPING ACCUMS DOWN. FOR THE TIME BEING THE FORECAST LOOKS REASONABLE WITH A MAJOR SNOWFALL OVER MOST OF THE FCST AREA. THE MD BORDER AND SERN ZONES WILL PROB SEE SOME SLEET OR EVEN A CHC OF FREEZING RAIN MAKING THE MESS MORE COMPLICATED DOWN THERE. OTHERWISE AVERAGE SNOWFALLS OF 8-12 INCHES LOOK LIKELY...WITH 18 OVER THE FAR NORTH NOT OUT OF THE QUESTION. WUDNT BE SURPRISED TO SEE SOME INTENSE SNOWFALL RATES WITH THUNDER SNOW TUES NIGHT INTO WED AM AS ELEVATED INSTABILITY GETS FACTORED INTO THE EQUATION. GFS AND NAM BOTH SHOW SHARP DECREASE IN LAYERED EPV WITH NEG VALUES DEVELOPING LATER TUES NIGHT INTO WED MORNING. COULD BE QUITE AN INTERESTING NIGHT. LASTLY...WED AFTERNOON WILL BECOME WINDY AS THE LOW BOMBS OFF NEW ENGLAND. WILL HAVE TO BE AWARE OF POTENTIAL FOR NEAR BLIZZARD CONDITIONS TO DEVELOP WHERE ALL OR MOST SNOW OCCURS AS IT WILL LIKELY BE A DRY POWDERY SNOW. THE UPDATE WILL JUST TWEAK OVERNIGHT WORDING...REST OF THE FORECAST WILL RIDE UNTIL THINGS START TO DEVELOP TUESDAY. LA CORTE && .PREV DISCUSSION... /ISSUED 248 PM EST MON FEB 12 2007/ SHORT TERM /TONIGHT THROUGH WEDNESDAY/... LIGHT SNOW ADVANCING IN FROM THE WEST IS TRYING TO MAKE IT TO THE GROUND...BUT IS DRYING UP BEFORE DOING SO...BUT MOISTURE SHOULD INCREASE THROUGH THE NIGHT. FRONT IS INCHING SWRD THRU WRN NY AND WILL BE INTO THE AREA SOON. WILL HOLD RIGHT WITH THE MAV GUID FOR TEMPS THE NEXT 36 HRS...AS THERE IS LITTLE DIURNAL CHANGE - AND MOSTLY OFF-TIME/NON-DIURNAL CHANGES TO COME AS THE WARM AIR WAGGLES IN ABOVE FROM THE SOUTH. THE STORM: STILL TAKING SHAPE...BUT ENUF CONFIDENCE NOW THAT WE WILL POST WINTER STORM OR HVY SNOW WARNINGS FOR THE ENTIRE CWA WITH THIS PKG. GREAT MOISTURE INFLOW FROM GOMEX FEEDING IT NOW...AND ATLANTIC MSTR KEEPS PWATS ABOVE NORMAL. HVY SNOW THREAT MAY HAVE SHIFTED A BIT TO THE NORTH FROM ORIG FCSTS...BUT THE THREAT OF NASTY WX CONTINUES TO LOOK DEFINITE FOR ALL THE AREA. SNOW DEVELOPS LATE TONIGHT JUST TO OUR SOUTH AND SLIDES NWRD INTO OUR CWA IN THE MORNING. IT SHOULD SNOW OVER MOST OF MY CWA BY 5 PM...WITH QUITE A FEW INCHES IN THE LAURELS AND WESTERN MTS. PRIMARY LOW DOES NOT GIVE UP EASILY...BUT LLVL PRESSURE FALL IN ERN PA BY THE END OF TUES NIGHT AND KEEP PRECIP GOING IN THE EAST THRU MUCH OF WED. TIMING HAS NOT WAVED MUCH THESE LAST FEW CYCLES. THIS IS VERY CONSISTENT. GFS-BASED GEFS SOLNS ARE BACK TO A BIT OF A COOLER SOLN...WHICH WILL KEEP IT ALL SNOW IN THE NORTH AND SOME MIX WITH SLEET IN THE RIDGE AND VALLEY REGION AND LAURELS. ADMIRABLY PERFORMING NAM12 SAYS THE SE WILL LIKELY SEE THINGS CHANGE TO PROLONGED PD OF FZRA...BUT WILL TEMPER THAT LOFTY 1+ INCH OF ICE PROG FROM THE NAM12 TO JUST AROUND A QUARTER OF AN INCH POSSIBLE IN LANCASTER/YORK. STILL PLENTY OF SNOW SLEET AND ICE TO MAKE A REAL MESS LATE TUES AND MOSTLY ON WED. SNOW NUMBERS WILL BE INCHED /BAD PUN/ UP AGAIN WITH THIS PKG...AND THE NRN TIER COULD END UP SEEING OVER A FOOT. AGAIN...WILL TRY TO HIGHLIGHT THE THREATS MORE SPECIFICALLY IN THE WSW PRODUCT. LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... DID NOT MAKE MANY CHANGES FROM YESTERDAY. WITH STORM TRACKING SLIGHTLY FURTHER NORTH NOW...TEMPS FOR THE LATER PART OF THE WEEK MAY BE A FEW DEGREES WARMER...BUT NOT MUCH. BEST CHC FOR WRAP AROUND SNOW AND LAKE EFFECT SNOW STILL LOOKS TO BE LATE THU INTO EARLY SAT...PERHAPS SLIGHTLY EARLIER FOR WARREN COUNTY ETC. KEPT LOW CHC POPS IN FOR NEXT SUNDAY. WENT WITH DRY CONDITIONS FOR NEXT MONDAY. GFS AT 240 HRS HAS ANOTHER MAJOR SYSTEM COMING OUT OF THE SW. AVIATION /20Z-18Z/... SCATTERED LIGHT SNOW SHOWERS AND OCCASIONAL MVFR CEILINGS POSSIBLE ACROSS PARTS OF THE STATE TONIGHT ASSOCIATED WITH A COLD FRONT. OTHERWISE...NO IMPACTS THROUGH MUCH OF TONIGHT. HOWEVER...A SIGNIFICANT WINTER STORM WILL DEVELOP ACROSS THE REGION LATER TONIGHT AND PROVIDE A SIGNIFICANT IMPACT TO AVIATION THAT WILL LAST WELL INTO WEDNESDAY. SEVERAL FORECAST CONCERNS: TIMING AND OVERALL IMPACTS TO CEILINGS AND VIS AS WELL AS HOW FAR THE WINTRY MIX WILL EXTEND INTO THE STATE. LOOKS LIKE THE SNOW WILL BEGIN ACROSS THE SOUTH AND WEST...ABOUT MID WAY THROUGH THE PERIOD...AND THEN GRADUALLY SHIFT EAST AND NORTH. THERE IS STILL A HIGH DEGREE OF UNCERTAINLY WITH THE STORM TRACK/TIMING...THEREFORE BEST STRATEGY WAS TO LIMIT OVERALL IMPACT...PARTICULARLY NEAR THE END OF THE PERIOD. EXPECT VIS WITH THIS SNOW TO DROPS BELOW 1/2 MILE WHEN IT FINALLY GETS GOING. AS FOR THE EXTENT OF THE FREEZING RAIN POTENTIAL...THE HIGHEST POSSIBILITY WILL BE FOR SOUTHEASTERN PENNSYLVANIA...POSSIBLY AS FAR NORTH AS KMDT...BUT AROUND OR AFTER 18Z TOMORROW. && .CTP WATCHES/WARNINGS/ADVISORIES... HEAVY SNOW WARNING FROM 9 AM TUESDAY TO 4 PM EST WEDNESDAY FOR PAZ004>006-010>012-017-018-037-041-042. WINTER STORM WARNING FROM 9 AM TUESDAY TO 4 PM EST WEDNESDAY FOR PAZ045-046-049>053-058. WINTER STORM WARNING FROM 4 AM TUESDAY TO 4 PM EST WEDNESDAY FOR PAZ024-033. WINTER STORM WARNING FROM 7 AM TUESDAY TO 4 PM EST WEDNESDAY FOR PAZ019-025>028-034>036-056-057-059-063>066. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 522 AM EST MON FEB 12 2007 PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046- 049>053-056>059-063>066-131030- WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD- NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN- JUNIATA-SOMERSET-BEDFORD-FULTON-FRANKLIN-TIOGA-NORTHERN LYCOMING- SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR- NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON- CUMBERLAND-ADAMS-YORK-LANCASTER- 522 AM EST MON FEB 12 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY A DEVELOPING STORM WILL TRACK FROM THE SOUTHERN PLAINS THIS EVENING TO THE MID ATLANTIC COAST BY WEDNESDAY MORNING. THIS SYSTEM WILL SPREAD SNOW INTO THE STATE ON TUESDAY. PRECIPITATION WILL LIKELY TURN TO A WINTRY MIX OVER SOUTHERN PENNSYLVANIA TUESDAY NIGHT...WHILE HEAVY SNOW FALLS ACROSS THE NORTH. MOST LIKELY SNOW ACCUMULATIONS WILL RANGE FROM 6 TO 12 INCHES OVER THE NORTH. ACCUMULATIONS OF 3 TO 6 INCHES ARE MORE LIKELY ACROSS THE SOUTH...DUE TO THE CHANGEOVER. BLUSTERY AND COLD CONDITIONS ARE EXPECTED TO DEVELOP WEDNESDAY NIGHT THROUGH FRIDAY. SIGNIFICANT BLOWING AND DRIFTING SNOW IS LIKELY OVER AREAS THAT RECEIVE MOSTLY SNOW FROM THE UPCOMING STORM. IN ADDITION...DANGEROUS WIND CHILLS OF AROUND 15 BELOW ZERO ARE POSSIBLE LATE THIS WEEK...ESPECIALLY OVER THE MOUNTAINS DURING WEDNESDAY AND THURSDAY NIGHTS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The national radar mosaic for the moment the first event began.
25 winter storm. Local standard time, as filed.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Bedford County, a mix of sleet and freezing rain fell in addition to 6 to 7 inches of snow.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Somerset County, a mix of sleet and freezing rain fell in addition to 6 to 12 inches of snow. Over the highest elevations of the county, 16 inches of snow was recorded at Mount Davis.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Blair County, a mix of sleet and snow accumulated 7 to 8 inches.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Cambria County, a mix of sleet and snow accumulated 11 to 15 inches.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Adams County, a mix of sleet and freezing rain fell in addition to 6 to 8 inches of snow.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Franklin County, a mix of sleet and freezing rain fell in addition to 6 to 7 inches of snow.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Fulton County, a mix of sleet and freezing rain fell in addition to 6 to 7 inches of snow.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Lancaster County, a mix of sleet and freezing rain fell in addition to 6 to 8 inches of snow.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In York County, a mix of sleet and freezing rain fell in addition to 6 to 8 inches of snow.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Cumberland County, a mix of sleet and freezing rain fell in addition to 6 inches of snow.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Dauphin County, a mix of sleet and freezing rain fell in addition to 6 to 9 inches of snow.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Huntingdon County, a mix of sleet snow accumulated 7 to 10 inches.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Juniata County, a mix of sleet snow accumulated 7 to 9 inches.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Lebanon County, a mix of sleet and freezing rain fell in addition to 8 inches of snow.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Mifflin County, a mix of snow and sleet accumulated 9 inches.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Perry County, a mix of sleet and freezing rain fell in addition to 7 to 9 inches of snow.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Southern Centre County, a mix of snow and sleet accumulated 9 to 12 inches.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Snyder County, a mix of snow and sleet accumulated 6 to 8 inches.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Southern Clinton County, a mix of snow and sleet accumulated 10 to 13 inches.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Union County, a mix of snow and sleet accumulated 6 to 8 inches.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Montour County, a mix of snow and sleet accumulated 6 to 9 inches.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Northumberland County, a mix of snow and sleet accumulated 8 to 14 inches.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Schuylkill County, a mix of snow and sleet accumulated to 10 to 15 inches.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Columbia County, a mix of sleet and snow accumulated 10 to 11 inches.
A major winter storm, the first of the season, struck central Pennsylvania from the early morning hours of the 13th through the afternoon hours of the 14th. In Southern Lycoming County, a mix of snow and sleet accumulated 9 to 12 inches.
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, February 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: 11615, 11634, 11616, 11617, 11613, 11621, 11622, 11625, 11641, 11619, 11620, 11623, 11624, 11626, 11627, 11630, 11635, 11632, 11636, 11640, 11628, 11629, 11631, 11618, 11638.