A severe thunderstorm complex moved south from western New York across north-central Pennsylvania during the early afternoon on 4 June 2011. The broken line of thunderstorms on the leading edge of the complex produced damaging winds in Warren County.
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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 severe thunderstorm complex moved south from western New York across north-central Pennsylvania during the early afternoon on 4 June 2011. The broken line of thunderstorms on the leading edge of the complex produced damaging winds in Warren County.
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 Jun 4, 10:01 AM EST, 1 hour 50 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 1101 AM EDT SAT JUN 4 2011 .SYNOPSIS... A WEAK LOW PRESSURE SYSTEM WILL DIVE SOUTHEAST ACROSS THE REGION LATE TODAY AND TONIGHT. A LINGERING TROUGH OF LOW PRESSURE WILL REMAIN ACROSS EASTERN PENNSYLVANIA ON SUNDAY. A BLOCKING PATTERN WILL LIKELY KEEP PENNSYLVANIA IN A DRY NW FLOW EARLY NEXT WEEK. HOWEVER...THE BLOCK SHOULD BREAK DOWN DURING THE SECOND HALF OF THE WEEK...ALLOWING AN UPPER RIDGE TO OVERSPREAD PA. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... EARLY SUNSHINE QUICKLY DISAPPEARING BEHIND THICKENING ALTO CU/ALTO STRATUS...AS WAA PATTERN DEVELOPS IN ADVANCE OF SHORTWAVE TRACKING THRU THE GRT LKS. EARLIER CLOUD AND POP TRENDS IN GOOD SHAPE THIS MORNING. WATCHING NORTHWEST FLOW AND POTENTIAL FOR LARGE HAIL CLOSELY FOR NORTHWEST PA AT THIS TIME...KCCX RADAR IS INDICATES 64 DBZ TO 34K FEET AT THIS TIME ON THE NORTH CENTRAL LAKE ERIE SHORELINE. STRONG MOISTURE FLUX WITH MID 50S TO AROUND 60F DEWPOINTS FROM THE SOUTHWEST WILL MAINTAIN THE MCS AS IT TRACKS ESEWD INTO NORTHWEST AND NORTH CENTRAL PA THIS AFTERNOON. ELEVATED NATURE OF CONVECTION INDICATES LARGE HAIL VS. WIND GUSTS AS THE MAIN SEVERE WEATHER THREAT. BEST STORM PROPOGATION OVER FAR WESTERN PA FAVORS WESTERN THIRD OF PA FOR SEVERE HAIL THREAT. CLOUD COVER AND POSSIBLE SHRA WILL HOLD TEMPS DOWN ACROSS EASTERN PA...WHERE THE HIGHER TERRAIN OF THE POCONOS MAY STRUGGLE TO REACH 70F. FURTHER WEST...PARTIAL SUNSHINE AND APPROACH OF WARM FRONT WILL RESULT IN A CHANCE OF LATE DAY TSRA ACROSS THE NW MTNS. WARREN CO STANDS THE BEST CHC TO BREAK INTO WARM SECTOR AHEAD OF SEWRD TRACKING SFC LOW. SREF CAPES NR 1500 J/KG...COMBINED WITH DEEP LYR SHEAR SUPPORTS A SLIGHT CHC OF SVR WX LATE TODAY UP THERE. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SUNDAY/... HAVE PLACED GREATEST CHC OF SHRA/TSRA ACROSS THE W MTNS THIS EVENING IN ASSOC WITH PASSAGE OF LOW LVL JET AND BEST LL MOIST FLUX. DIMINISHING CHC OF THUNDER EXPECTED DEEPER INTO THE STABLE AIR ACROSS EASTERN PA. ENS MEAN QPF TONIGHT RANGES FROM 0.2 INCHES OVR THE NW MTNS...TO A COUPLE HUNDREDTHS OVR THE SE. CLOUD COVER AND SURGE OF HIGHER DWPTS WILL RESULT IN A MUCH WARMER TEMPS THAN THOSE OF RECENT NIGHTS...WITH LOWS MOSTLY IN THE M/U50S. TRIPLE PT LOW PASSES SOUTH OF PA EARLY SUNDAY. HOWEVER...OCCLUSION WILL STALL OVER EASTERN PA...AS ASSOC SHORTWAVE LIFTS NE INTO QUEBEC. THE RESULT WILL BE A DRIER NW FLOW ACROSS WESTERN PA...WHILE SCT PM CONVECTION IS POSSIBLE IN VICINITY OF SFC TROUGH IN THE EAST. SREF DATA INDICATES MODEST CAPES DEVELOP OVR THE EAST...ENOUGH TO SPARK SCT PM TSRA. MOST SUNSHINE WILL BE IN THE WESTERN ZONES...WHICH SHOULD MITIGATE THE NORMAL WEST/EAST TEMP GRADIENT...WITH MAX TEMPS EVERYWHERE IN THE U70S/L80S. && .LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/... A PERIOD OF DRY/SEASONABLE WX APPEARS LIKELY EARLY NEXT WEEK...AS ALL MED RANGE GUIDANCE TRACK CANADIAN HIGH PRESSURE SE ACROSS OUR REGION. FAIRLY GOOD CONSENSUS AMONG MDL GUIDANCE THAT UPPER LVL BLOCKING PATTERN OVR THE ATLANTIC BREAKS DOWN BY MID WEEK...ALLOWING RIDGE TO OVERSPREAD PA. THUS...HAVE RAISED TEMPS...WHICH SHOULD PEAK AHEAD OF AN APPROACHING COLD FRONT ON THURSDAY. GEFS 850 TEMPS NR 20C INDICATE HIGHS IN THE L90S POSSIBLE IN THE VALLEYS THURS AFTN. MDL SPREAD BECOMES MORE SIGNIFICANT BY LATE IN THE WEEK...AFFECTING TIMING AND STRENGTH OF COLD FRONT. HOWEVER...CONSENSUS SEEMS TO INDICATE FRONT WILL CLEAR THE AREA ON FRIDAY...BRINGING COOLER/DRIER WX. && .AVIATION /15Z SATURDAY THROUGH WEDNESDAY/... VFR CONDITIONS PREVAIL ACROSS THE REGION THIS MORNING. REMNANTS OF OVERNIGHT CONVECTIVE COMPLEX DIVING SOUTHWARD THIS MORNING FROM ONTARIO. THIS WILL WEAKEN...BUT CONTINUE TO RIDE SOUTHEAST ALONG THE BEST AREA OF DEVELOPING WARM ADVECTION. THIS WAVE ON INCREASED SHOWER ACTIVITY WILL DROP INTO NORTHEAST PA THIS AFTERNOON. THEN SCATTERED SHOWERS AND POSSIBLE TSRA WILL CONTINUE INTO THE EVENING UNTIL A WEAK COLD FRONT CROSSES THE STATE. EXPECT HIGHER LOW LEVEL MOISTURE TO WORK INTO WESTERN AND NORTHWESTERN AREAS OVERNIGHT WITH THE PASSAGE OF THE FRONT...AND INTRODUCE LOWER CIGS AND VSBYS (MVFR...WITH SOME LOCAL IFR ESPECIALLY IN THE KJST AREA). FRONT MAY AGAIN ACT AS A FOCUS FOR SHRA AND TSRA SUNDAY... ESPECIALLY OVER EASTERN AREAS. OUTLOOK... MON-WED...MAINLY VFR WITH WEAK HIGH PRESSURE OVER THE REGION. && .CTP WATCHES/WARNINGS/ADVISORIES... NONE. && SYNOPSIS...FITZGERALD NEAR TERM...DEVOIR/FITZGERALD SHORT TERM...FITZGERALD LONG TERM...FITZGERALD/GARTNER AVIATION...JUNG
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 934 AM EDT SAT JUN 4 2011 PAZ005-006-010>012-017>019-024>028-033>037-041-042-045-046-049>053- 056>059-063>066-051345- 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- 934 AM EDT SAT JUN 4 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. PAZ004-051345- WARREN- 934 AM EDT SAT JUN 4 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. A LOW PRESSURE SYSTEM WILL DIVE SOUTHEAST ACROSS THE GREAT LAKES TODAY...PRODUCING SHOWERS AND THUNDERSTORMS ACROSS NORTHWEST PENNSYLVANIA LATE TODAY. THERE IS A SLIGHT CHANCE THAT SOME OF THE THUNDERSTORMS LATE THIS AFTERNOON OR EVENING COULD PRODUCE DAMAGING WIND GUSTS OR LARGE HAIL. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1214 PM EDT SAT JUN 4 2011
PAZ004>006-010-041700-
ELK PA-MCKEAN PA-POTTER PA-WARREN PA-
1214 PM EDT SAT JUN 4 2011
...STRONG THUNDERSTORMS WILL AFFECT MCKEAN...NORTHWESTERN ELK...
NORTHWESTERN POTTER AND WARREN COUNTIES...
AN AREA OF STRONG THUNDERSTORMS COVERED PORTIONS OF ELK...MCKEAN...
POTTER AND WARREN COUNTIES AT 1213 PM EDT. THE STRONG THUNDERSTORMS
WERE GENERALLY MOVING SOUTHEAST AT 60 MPH.
WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THESE STRONG THUNDERSTORMS.
EXPECT INTENSE LIGHTNING FROM THESE STRONG THUNDERSTORMS. DO NOT STAY
IN THE OPEN NOR SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...
MOVE INDOORS WHEN A THUNDERSTORM APPROACHES.
THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6...ROUTE 62...
ROUTE 219...STATE ROAD 46...STATE ROAD 59...STATE ROAD 66...STATE
ROAD 446.
LAT...LON 4201 7801 4200 7797 4188 7784 4155 7896
4162 7897 4162 7946 4176 7963 4200 7961
FORECASTER: KREKELERThe Buffalo radar (KBUF), 128 km away, was scanning. The volume nearest the first event began at 16:51 UTC.
1 thunderstorm wind, 1 lightning. Local standard time, as filed.
Thunderstorm winds estimated near 60 mph knocked down trees in Warren.
A 28 year-old female was struck by lightning at 3901 Schoolhouse Road in Dover Township. She was conscious and transported to a nearby hospital as a precaution. A trailer was struck by lightning causing a fire at 1445 Graceton Road in Peach Bottom Township. The trailer sustained smoke damages but the residents were not displaced.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2011Every state in 2011This day in weather historyWarnings in Pennsylvania, June 2011
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: 296754, 297029.