An isolated severe thunderstorms produced large hail and damaging winds in northeast Lycoming and Columbia Counties.
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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.
An isolated severe thunderstorms produced large hail and damaging winds in northeast Lycoming and Columbia Counties.
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 Jul 19, 12:56 PM EST, 1 hour 24 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 156 PM EDT TUE JUL 19 2011 .SYNOPSIS... A WEAK BOUNDARY JUST TO OUR SOUTH WILL SERVE AS A FOCUS FOR WIDELY SCATTERED SHOWERS AND THUNDERSTORMS THIS AFTERNOON AND EVENING. OTHERWISE...THE MAIN WEATHER STORY OVER THE NEXT FEW DAYS WILL BE AN EXPANSIVE RIDGE OF HIGH PRESSURE OVER THE CENTRAL PLAINS AND THE ASSOCIATED HEAT...WHICH IS EXPECTED TO SPREAD EASTWARD INTO THE MID-ATLANTIC REGION LATER THIS WEEK. && .NEAR TERM /THROUGH WEDNESDAY/... CONVECTION ALREADY BEGUN WITH TALLER SHOWERS AND PERHAPS THUNDER OVER THE SC MTS AT 1630Z. SOUNDINGS FROM LAPS AND RUC BOTH HAVE FZL AROUND 14KFT. WITH WEAK TO MOD SHEAR BUT SFC-BASED AND MUCAPES 200 OR BETTER...EXPECT THE CELLS TO BE PULSERS WITH ONLY ISOLD WIND DAMAGE IF ANY. SLIGHT RISK CONTINUES. POPS WILL REMAIN TIED MORE TO AREAL COVERAGE VS PROBABILITY - AND RUN BTWN 30 AND 50S. THE DIURNAL NATURE OF THE CONVECTION WILL HELP THE STORMS WEAKEN AND BECOME EVEN MORE ISOLATED THIS EVENING. CONVECTION COULD EXTENDED INTO THE EVENING AND EARLY NIGHT TIME...ESP OVER THE SOUTHERN AND EASTERN COS. HIGH SFC MOISTURE ENHANCED BY ANY RESIDUAL MOISTURE FROM RAINFALL SHOULD ALLOW FOR PATCHY FOG AGAIN LATE TONIGHT. && .SHORT TERM /WEDNESDAY NIGHT THROUGH FRIDAY NIGHT/... THE MAIN STORY THIS PERIOD WILL BE THE MASSIVE MID-LVL ANTICYCLONE AND ASSOCIATED HEAT WAVE BUILDING EASTWARD INTO THE MID ATLANTIC REGION FROM THE CENTRAL PLAINS STATES. ENSEMBLE-BASED HEAT THREATS PAGE IS CLEARLY POINTING TOWARD A POTENTIAL HIGH IMPACT HEAT EVENT WITH STRONG POSITIVE ANOMALIES NOTED IN ALL OF THE KEY FORECAST FIELDS. THE COMBINATION OF NEAR RECORD TO RECORD HIGHS AND HIGH DEWPOINTS IN THE UPPER 60S AND LOW 70S WILL LIKELY PRODUCE HEAT INDEX /HX/ VALUES AROUND 100 DEGREES IN MANY LOCATIONS...WITH SOME AREAS IN THE MIDDLE TO LOWER SUSQUEHANNA VALLEY POSSIBLY REACHING EXCESSIVE HEAT WARNING CRITERIA WITH HX VALUES EXCEEDING 104F. WILL CONTINUE TO HIGHLIGHT THE HEAT WAVE IN THE HWO...BUT THE NEXT FEW SHIFTS WILL NEED TO CONSIDER ISSUING HEAT RELATED HEADLINES. THE MAGNITUDE OF THE ANOMALIES SUGGESTS HIGH CONFIDENCE IN THE FORECAST FOR HIGH HEAT...PARTICULARLY THURSDAY AND FRIDAY JULY 21/22. STILL CANT RULE OUT AN ISOLD DIURNAL TSTM...BUT BY IN LARGE THE REGION SHOULD REMAIN HIGH AND DRY BENEATH LARGE SCALE SUBSIDENCE ASSOC WITH 590+DM RIDGE. THE PRIMARY BELT OF WLYS SHOULD REMAIN ALONG THE NRN TIER OF THE COUNTRY AND THEREFORE CONFINE THE GREATEST THREAT OF PCPN TO THE NORTH OF THE AREA. A WEAK FRONTAL BOUNDARY WILL TRY TO SLIP THROUGH THE REGION ON FRIDAY...BUT KEPT POPS MAINLY IN THE SCHC CATG. && .LONG TERM /SATURDAY THROUGH MONDAY/... 19/00Z MEDIUM RANGE MODEL AND ENSEMBLE GUIDANCE GENERALLY SUPPORTS THE IDEA THAT THE HEAT WAVE IN PROGRESS AT THE START OF THE PERIOD WILL BE SUPPRESSED /PERHAPS CONSIDERABLY/ BY EARLY NEXT WEEK AS THE RIDGE RETROGRADES WWD AND RE-ESTABLISHES ITSELF OVR THE PLAINS/ROCKIES. SAT-SUN STILL LOOK TO BE QUITE WARM BEFORE A MORE PRONOUNCED FROPA DRIVES COOLER/DRIER AIR SEWD FM THE GRT LKS BY DY8+. MODEL DIFFS ARE EVIDENT IN THE DEPTH OF THE ERN TROUGH BY EARLY NEXT WEEK WITH THE GFS MORE BULLISH IN BRINGING THE COLD FNT FARTHER SWD THAN THE ECMWF. A CONSENSUS SOLN IS RECOMMENDED BY DY7-8+ WITH CONFIDENCE DECREASING AS MDL SPREAD GROWS WITH TIME. && .AVIATION /18Z TUESDAY THROUGH SUNDAY/... PATCHY MVFR VSBYS LINGERING ACROSS CENTRAL PA THIS AFTN IN HAZE. ADDITIONALLY...WIDELY SCT CONVECTION POPPING UP WITH THE HEATING OF THE DAY. ANY CONVECTION WILL DISSIPATE WITH THE SETTING OF THE SUN. PATCHY FOG WILL FORM TONIGHT...WITH THE MUGGY AIRMASS IN PLACE. POTENTIAL IS THERE FOR SEVERAL LOCATIONS TO DROP TO IFR VSBYS...AND POSSIBLY LOWER IN A FEW PLACES. ANY FOG WILL DIMINISH WEDNESDAY MORNING...BUT IT WILL REMAIN HAZY. SUNSHINE...HEAT AND HUMIDITY WILL DOMINATE OUR WEATHER WED-THU. CHC FOR MAINLY AFTN/EVE CONVECTION INCREASES BY FRIDAY...AND CONTINUES INTO THE UPCOMING WEEKEND. OUTLOOK... WED...PATCHY AM FOG...OTHERWISE GENERALLY VFR. THU...MAINLY VFR. FRI...MAINLY VFR...MVFR POSS LATE IN SCT SHRA/TSRA. SAT...MAINLY VFR...MVFR POSS IN SCT SHRA/TSRA. && .CTP WATCHES/WARNINGS/ADVISORIES... NONE. && SYNOPSIS...STEINBUGL/EVANEGO NEAR TERM...DANGELO SHORT TERM...DANGELO/STEINBUGL LONG TERM...STEINBUGL AVIATION...EVANEGO
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE STATE COLLEGE PA 553 AM EDT TUE JUL 19 2011 PAZ004>006-010>012-017-018-024-037-041-042-200945- WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD- NORTHERN CENTRE-CAMBRIA-TIOGA-NORTHERN LYCOMING-SULLIVAN- 553 AM EDT TUE JUL 19 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...WEDNESDAY THROUGH MONDAY. HEAT INDEX VALUES WILL BE IN THE MID TO UPPER 90S THURSDAY AND FRIDAY AFTERNOON. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. PAZ019-025>028-045-046-049>053-058-200945- SOUTHERN CENTRE-BLAIR-HUNTINGDON-MIFFLIN-JUNIATA-SOUTHERN CLINTON- SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-NORTHUMBERLAND-COLUMBIA- SCHUYLKILL- 553 AM EDT TUE JUL 19 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...WEDNESDAY THROUGH MONDAY. HEAT INDEX VALUES MAY EXCEED 100 DEGREES DURING THE AFTERNOON FROM THURSDAY THROUGH SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. PAZ056-057-059-200945- PERRY-DAUPHIN-LEBANON- 553 AM EDT TUE JUL 19 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON. HEAT INDEX VALUES WILL APPROACH 100 DEGREES THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. HEAT INDEX VALUES WILL LIKELY EXCEED 100 DEGREES DURING THE AFTERNOON FROM THURSDAY THROUGH SATURDAY. HEAT INDEX VALUES BETWEEN 105 AND 110 DEGREES ARE POSSIBLE THURSDAY AND FRIDAY DURING THE PEAK OF THE HEAT WAVE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. PAZ033-200945- SOMERSET- 553 AM EDT TUE JUL 19 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. HEAT INDEX VALUES WILL BE IN THE MID TO UPPER 90S THURSDAY AND FRIDAY AFTERNOON. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. PAZ034-035-200945- BEDFORD-FULTON- 553 AM EDT TUE JUL 19 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. HEAT INDEX VALUES MAY EXCEED 100 DEGREES DURING THE AFTERNOON FROM THURSDAY THROUGH SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. PAZ036-063>066-200945- FRANKLIN-CUMBERLAND-ADAMS-YORK-LANCASTER- 553 AM EDT TUE JUL 19 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON. HEAT INDEX VALUES WILL APPROACH 100 DEGREES THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. HEAT INDEX VALUES WILL LIKELY EXCEED 100 DEGREES DURING THE AFTERNOON FROM THURSDAY THROUGH SATURDAY. HEAT INDEX VALUES BETWEEN 105 AND 110 DEGREES ARE POSSIBLE THURSDAY AND FRIDAY DURING THE PEAK OF THE HEAT WAVE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. MS
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 1113 AM EDT TUE JUL 19 2011 PAZ028-036-046-049>053-056>059-063>066-192315- JUNIATA-FRANKLIN-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR- NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON- CUMBERLAND-ADAMS-YORK-LANCASTER- 1113 AM EDT TUE JUL 19 2011 ...IT WILL FEEL LIKE IT IS CLOSE TO 100 DEGREES THIS AFTERNOON... THE HEAT INDEX...WHICH IS A MEASURE OF WHAT IT FEELS LIKE OUTSIDE...WILL APPROACH 100 DEGREES THIS AFTERNOON. MOST LOCATIONS WILL HAVE A HIGH TEMPERATURE IN THE LOWER TO MID 90S. THE HIGH HUMIDITY WILL MAKE IT MORE DIFFICULT FOR OUR BODIES TO COOL OFF NATURALLY. THURSDAY...FRIDAY AND EVEN SATURDAY HAVE THE POTENTIAL TO BE EVEN MORE OPPRESSIVE. STAY TUNED TO NOAA WEATHER RADIO OR YOUR LOCAL MEDIA FOR UPDATED FORECASTS AND INFORMATION ON THE HEAT WAVE AND SAFETY TIPS FOR DEALING WITH THE HOT AND HUMID WEATHER. MORE HEAT-RELATED SAFETY INFORMATION CAN BE FOUND ON WEATHER.GOV AND ON OUR FACEBOOK PAGE. DANGELO
The State College radar (KCCX), 126 km away, was scanning. The volume nearest the first event began at 19:20 UTC.
1 thunderstorm wind, 1 hail. Local standard time, as filed.
Thunderstorm winds estimated near 60 mph knocked down trees and utility wires in Montour and Hemlock Townships just west of Bloomsburg.
Quarter to golf ball sized (1-1.75 inch diameter) hail reported near Picture Rocks along US 220.
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, July 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: 313146, 312638.