A strong, late season Nor'easter brought rain and heavy, wet snow to portions of Central Pennsylvania during April 16 through 17. Rain initially over the region changed to wet snow during the 16th, continuing into the early morning hours of the 17th.
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.
A strong, late season Nor'easter brought rain and heavy, wet snow to portions of Central Pennsylvania during April 16 through 17. Rain initially over the region changed to wet snow during the 16th, continuing into the early morning hours of the 17th. Heavy snowfall was confined to higher elevations, with warning criteria snow only observed along ridges. Valley locations received much lesser snow amounts. The heavy snow, combined with strong northwest winds of 20 to 40 mph caused numerous power outages across the region.
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 Apr 15, 7:34 PM EST, 26 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 834 PM EDT SUN APR 15 2007 .SYNOPSIS... A STRONG STORM SYSTEM WILL MOVE UP THE EASTERN SEABOARD TONIGHT AND THEN MOVE SLOWLY THROUGH SOUTHERN NEW ENGLAND AND THE IMMEDIATE COASTAL WATERS THROUGH MID WEEK. AFTER THAT...THE WEATHER WILL QUIET DOWN FOR SEVERAL DAYS AND TEMPERATURES WILL SLOWLY MODERATE. && .NEAR TERM /UNTIL 11 PM THIS EVENING/... SFC ANALYSIS EARLY THIS EVENING PLACES A DEEP /984MB/ SFC LOW OVER THE PIEDMONT OF NC...WITH AN INVERTED TROF RUNNING UP INTO SRN NJ. THE BULK OF THE PRECIP FALLING OVER PA NOW IS RAIN...EXCEPT OVER THE HIGHEST ELEVATIONS ACROSS THE NORTHERN TIER...WHERE A DEFORMATION BAND HAS BEGUN TO DEVELOP. HOWEVER...RAIN STILL FALLING AT THE LOWEST ELEVATIONS THERE WHERE TEMPS ARE IN THE LOWER TO MID 30S. A GRADUAL COOLING THIS EVENING WILL LEAD TO AN ALMOST TOTAL CHANGEOVER TO SNOW NORTH AND WEST OF IPT AND UNV...AGAIN HAPPENING FIRST ON THE HILL TOPS. THIS PRESENT DEFORMATION BAND SHOULD CONTINUE TO WIDEN AND EXPAND. REGIONAL RADARS SHOW THAT HEAVIEST BAND OF RAIN WAS RUNNING FROM KABE-KRDG-KBWI AND SHOULD CONTINUE TO NUDGE EASTWARD AS THE SFC LOW DEVELOPS OVER/TRANSLATES TO THE DELMARVA. && .SHORT TERM /11 PM THIS EVENING THROUGH 6 PM MONDAY/... THE COLDER AIR WILL CONTINUE TO MOVE INTO THE CWA TONIGHT. WHILE THE COLD AIR GETS DRAWN IN...THE HEAVIEST OF THE PRECIP SHUD BE WINDING DOWN OR OVER...WITH LIMITED MOISTURE FEED ON A LONG WRAP- AROUND PATH. THE MOVEMENT AND POTENTIAL LIFE OF THE DEFORMATION BAND NOW DEVELOPING WILL BE THE BIGGEST FORECAST ISSUE OVERNIGHT. MESO MDLS WEAKEN THIS CURRENT FEATURE IN FAVOR OF A HEAVIER BAND OF SNOW OVER THE NERN THIRD OF THE STATE TONIGHT. HAVE CONTINUED THE WINTER WX ADVISORY FOR THE NORTHLANDS...BUT SULLIVAN AND TIOGA COUNTIES MAY BE JUST ON THE EDGE OF THE VERY HEAVY SNOW. ROADWAY/GROUND TEMPS ARE STILL WARM RIGHT NOW PER AVAILABLE PENN DOT RWIS SENSORS...BUT THE NIGHTTIME WILL BRING COOLING. HAVE THUS KEPT FCST SIMILAR TO NEXT CONCERN WILL BE WINDY CONDITIONS DEVELOPING ON THE BACK SIDE OF EXITING LOW. STRONG WINDS AT ALL LEVELS WILL MIX DOWN ON MONDAY WITH STRONGEST WINDS IN THE SUSQ VALLEY WHERE GUSTS TO NEAR 50 MPH WILL BE COMMON. WIND ADVISORY HAS BEEN ISSUED FOR SOUTHERN 2/3 OF CWA. GRADIENT SLOWLY WEAKENS MON EVE...WHEN WINDS WILL FALL BELOW ADVISORY CRITERIA. && .LONG TERM /MONDAY NIGHT THROUGH SUNDAY/... WEATHER WILL BE SLOW TO IMPROVE AS PERSISTENT COOL NORTHWEST FLOW CONTINUES THROUGH MID WEEK. WEAK WAVES WILL RIPPLE THROUGH THE FLOW KEEPING MENTION OF LOW POPS IN THE FORECAST AND A DECENT AMOUNT OF CLOUDS AROUND. ANOTHER DECENT WAVE SLIDES THROUGH THE FLOW ON WED/THU BRINGING BEST CHANCE OF PRECIP FOR LATE WEEK /RAIN CENTRAL AND SOUTH WITH RAIN AND SNOW NORTH/. ONCE THIS WAVE MOVES THROUGH...SPRING FINALLY GETS AN ATTEMPT TO RETURN. NEXT WEEKEND LOOKS QUIET WITH MODERATING TEMPERATURES. && .AVIATION /00Z MONDAY THROUGH FRIDAY/... A DEEPENING SURFACE LOW PRESSURE SYSTEM CENTERED JUST EAST /OFFSHORE/ OF KORF WILL TRACK NEWD ALONG THE MID-ATLANTIC COAST AND BECOME NEARLY STATIONARY NEAR LONG ISLAND THROUGH 00Z TUE. THIS STORM WILL BRING LOW CLOUDS...STRONG WINDS AND AREAS OF RAIN AND SNOW TO CENTRAL PA AIRFIELDS OVER THE NEXT 12 TO 24 HOURS. WDSPRD IFR/MVFR CONDS WILL BE COMMON WITH SFC WNDS INCREASING TO 20-30MPH WITH GUSTS TO 40+KTS. IN SHORT...POOR FLYING CONDS XPECTED TONIGHT THROUGH MONDAY. COOL...MOIST CYCLONIC FLOW WILL CONTINUE TO BRING LOW CLOUDS TO THE AREA TUESDAY. KBFD/KJST WILL LKLY EXPERIENCE THE WORST CONDS...AS IS USUALLY THE CASE GIVEN SYNOPTIC FLOW REGIME. AN UPPER LEVEL DISTURBANCE WILL DROP SWD INTO THE UPR OH VLY LATE TUE INTO WED...WITH DEGRADED FLYING CONDS TO CONTINUE THRU MID WEEK. SFC HIGH PRES WILL BEGIN TO BUILD IN BY FRIDAY WITH GRADUAL IMPROVEMENT XPECTED. && .HYDROLOGY... UP 2 INCHES OF RAIN HAS FALLEN OVR LOWER SUSQ VALLEY AS OF 20Z. FLOOD WATCH CONTINUES TO COVERS THESE ZONES THROUGH TONIGHT FOR ADDITIONAL AMOUNTS OF 1-2 ON AVERAGE...MOST OF WHICH WILL FALL DURING THE NEXT 6 HOURS. SOME SMALLER STREAMS AREA APPROACHING BANKFULL. IF WIDESPREAD HIGHER AMOUNTS ARE REALIZED...SOME OF THE FLASHIER MAIN STEM SUSQUEHANNA RIVER AND TRIBUTARY POINTS MAY ALSO APPROACH FLOOD. && .CTP WATCHES/WARNINGS/ADVISORIES... WINTER WEATHER ADVISORY UNTIL 12 PM EDT MONDAY FOR PAZ004>006- 010-011-037-042. WIND ADVISORY FROM 6 AM TO 6 PM EDT MONDAY FOR PAZ012-017>019- 024>028-033>036-041-045-046-049>053-056>059-063>066. FLOOD WATCH UNTIL 6 AM EDT MONDAY FOR PAZ057>059-063>066. && SYNOPSIS...LACORTE NEAR TERM...DANGELO SHORT TERM...DANGELO/FITZGERALD/RXR LONG TERM...RXR AVIATION...STEINBUGL HYDROLOGY...RXR
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 304 PM EDT SUN APR 15 2007 PAZ004>006-010-011-037-042-161915- WARREN-MCKEAN-POTTER-ELK-CAMERON-TIOGA-SULLIVAN- 304 PM EDT SUN APR 15 2007 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 12 PM EDT 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 ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WINTER WEATHER ADVISORY. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WINTER WEATHER ADVISORY. IN ADDITION...ON MONDAY STRONG GUSTY NORTHWEST WINDS WILL DEVELOP. SPEEDS OF 20 TO 30 MPH WITH GUSTS UP TO 40 MPH WILL BE COMMON BEFORE WINDS GRADUALLY DIMINISH MONDAY NIGHT. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. PAZ012-017>019-024>028-033>036-041-045-046-049>053-056-161915- NORTHERN CLINTON-CLEARFIELD-NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA- BLAIR-HUNTINGDON-MIFFLIN-JUNIATA-SOMERSET-BEDFORD-FULTON-FRANKLIN- NORTHERN LYCOMING-SOUTHERN CLINTON-SOUTHERN LYCOMING-UNION-SNYDER- MONTOUR-NORTHUMBERLAND-COLUMBIA-PERRY- 304 PM EDT SUN APR 15 2007 ...WIND ADVISORY IN EFFECT FROM 6 AM TO 6 PM EDT 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 ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WIND ADVISORY. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WIND ADVISORY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. PAZ057>059-063>066-161915- DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-ADAMS-YORK-LANCASTER- 304 PM EDT SUN APR 15 2007 ...FLOOD WATCH IN EFFECT THROUGH LATE TONIGHT... ...WIND ADVISORY IN EFFECT FROM 6 AM TO 6 PM EDT 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 ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. FLOOD WATCH. WIND ADVISORY. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. WIND ADVISORY. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. RXR
The national radar mosaic for the moment the first event began.
6 heavy snow. Local standard time, as filed.
Rain changed to snow across the county Sunday evening. Accumulations of snow ranged greatly across the county, with greatest amounts of around 6 inches over the higher elevations to the north and east of Williamsport.|
Rain changed to snow across the county Sunday evening. Significant accumulations of snow were confined to the higher elevations of the northwest portions of the county, with much lesser amounts in valley locations. Frackville and Ashland both recorded 11.0 inches of snow from the storm, while Mahanoy City recorded 9.8 inches. In the valleys, snow totals included 1 inch at Pine Grove and Pottsville.|Over 10,000 customers lost power in the Frackville area from the snow and wind.
Rain changed to snow across the county Sunday evening. Significant accumulations of snow occurred over most of the county, with Dushore reporting twelve inches, Laporte reporting ten inches and Eldredsville reporting five and one half inches. Greatest snow totals occurred over the higher elevations.
Rain changed to snow across the county Sunday evening. Significant accumulations of snow were confined to the higher elevations of the county, while valley locations saw significantly less snow. Reports ranged from 6.2 inches in Sabinsville and 5.0 inches in Covington, to between 2 and 3 inches in Wellsboro and at Cowanesque Dam.
Rain changed to snow across the county Monday morning. Accumulations of snow ranged greatly across the county, with highest amounts of around 6 inches over the ridges. Johnstown reported 6 inches of snow with the event.
Rain changed to snow across the county Monday morning. Significant accumulations of snow were confined to the higher elevations of the county, while valley locations saw much less snow. While 13.9 inches of snow was reported on Laurel Summit, only 1.0 inch of snow was reported in Meyersdale. Somerset recorded 4.6 inches of snow, and Glencoe recorded 2.2 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, April 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: 15839, 15840, 15841, 15842, 15838, 15843.