A cold front moved into a very warm and unstable air mass over central Pennsylvania, which triggered numerous severe thunderstorms during the afternoon and evening.
Every event with a place to put it. 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 cold front moved into a very warm and unstable air mass over central Pennsylvania, which triggered numerous severe thunderstorms during the afternoon and evening.
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 7, 10:25 AM EST, 3 hours 15 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 1125 AM EDT SAT JUL 7 2012 .SYNOPSIS... A LARGE RIDGE OF HIGH PRESSURE WILL PRODUCE PERHAPS THE HOTTEST DAY OF THE SUMMER TODAY. A COLD FRONT WILL SLIP SOUTH FROM NEW YORK STATE AND PUSH THE HOT AIR TO THE SOUTH AND EAST ON SUNDAY. THIS WILL BEGIN A COOL DOWN THAT WILL LAST MUCH OF NEXT WEEK. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... LATE MORNING SATELLITE AND RADAR COMPOSITE SHOWS THE INITIAL STAGES OF AN MCS /ASSOCIATED WITH A FLAT UPPER SHORTWAVE AND CORRESPONDING...POWERFUL MID LEVEL JET CORE OF 50-60 KTS/ THAT WILL PLOW TO THE SE AND NIP OUR FAR NERN COUNTIES THROUGH EARLY THIS AFTERNOON. THE LLVL OUTFLOW BOUNDARY FROM THIS CONVECTIVE FEATURE...WILL COMBINE WITH THE INLAND PENETRATION OF THE LAKE ERIE BREEZE...AND FAVORABLE RIGHT ENTRANCE REGION OF AN APPROACHING UPPER JETLET TO DEVELOP ADDITIONAL CLUSTERS OF STRONG TO POSSIBLY SVR TSRA ACROSS NRN PENN AFTER 18Z. THE STRONG MID LEVEL CAP...HIGHLIGHTED BY 700 MB TEMPS OF GRTN +12C...SHOULD GREATLY LIMIT THE SOUTHWARD PROGRESSION OF TSRA LATE TODAY INTO THE SOUTHERN HALF OF PENN. FOCUS AREA OF SVR TSRA LATE THIS AFTERNOON AND EVENING WILL BE NEAR AND JUST TO THE NORTH OF INTERSTATE 80 IN CENTRAL AND EASTERN PENN. POCKETS OF 0-1KM EHI...0-1KM AND 0-3 KM BULK SHEAR OF 25KTS AND 40 KTS RESPECTIVELY /ALONG WITH A BAND OF RELATIVELY LOWER SFC DEWPOINT DEPRESSIONS LESS THAN 10F/ WILL SUPPORT THE POTENTIAL FOR STRONG/DAMAGING STRAIGHT LINE WINDS FROM THE NORTHWEST...AND EVEN SOME TRANSIENT SUPERCELLS NEAR AND TO THE EAST OF KIPT. THE WINDS WILL BECOME MORE-WESTERLY AND THE SUN WILL BAKE THE AREA THIS AFTERNOON. DEEP MIXING AND EXTREMELY ABNORMAL TEMPERATURES ALOFT WILL LEAD TO MAXES AROUND 100F IN THE SUSQ VALLEY. ALL THE REST OF THE AREA WILL BE IN THE 90S. THESE ARE ALL VERY CLOSE TO RECORD VALUES FOR THE DAY. SEE BELOW FOR MORE DETAILED CLIMATE INFO. MODEL DATA SUGGESTS THAT ISOLD STORMS MOVE DOWN FROM WRN NY OR POP UP OVER THE NE LATE THIS AFTN...BUT THE NAM IS VERY PESSIMISTIC/DRY VS THE OTHER NEAR TERM GUIDANCE. THE GFS IS MOST-AGGRESSIVE IN GENERATING CONVECTION/QPF IN THE AFTERNOON. THE LACK OF QPF IS NOT SURPRISING SINCE THE WARM TEMPS ALOFT WILL BE A HINDRANCE TO DEEP CONVECTION. WILL CONTINUE AS WITH PREV FORECASTS AND HINT AT ISOLD/SCT CONVECTION IN THE NE THIS AFTN...AND FOR MOST OF THE NRN TIER BY EARLY EVENING. SPC SLIGHT RISK MENTIONS MODERATE TO STRONG VERTICAL SHEAR WHICH COULD MAKE SUPERCELL STORMS POSSIBLE. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM SUNDAY/... SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO BE FIRING UP OVER THE NORTH IN THE EVENING. BUT...THE LOSS OF BEST SOLAR RADIATION COULD KEEP THE CONVECTION SPARSE. WILL TOP POPS AT ABOUT 40PCT. WILL CONTINUE TO MENTION TSTORMS WITH GUSTY WINDS. TEMPS IN THE ENTIRE PROFILE ARE VERY WARM SO LARGE HAIL IS A LOWER THREAT THAN WIND DAMAGE. IF STORMS REMAIN CELLULAR....THE THREAT FOR HAIL WILL BE GREATER. BUT SPC MENTIONS MORPH OF STORMS INTO MULTI-CELL AND/OR BOWING MCS POSSIBLE. THE REAL FRONT AND DRY/COOLER AIR WAITS UNTIL LATE TONIGHT OR EARLY SUNDAY TO GET INTO THE FAR N...AND TAKES UNTIL SUNDAY NIGHT TO REACH THE SOUTHERN BORDER. WILL KEEP MINS VERY MILD IN THE SRN HALF OF THE AREA. THE NRN TIER SHOULD DIP INTO THE L-M60S...NOT FAR FROM NORMALS. SINCE THE FRONT MOVES SLOWLY...SCT SHOWERS AND THUNDERSTORMS REMAIN IN THE FORECAST THROUGH SUNDAY EVENING IN THE SOUTH. SLIGHT RISK STAYS UP OVER THE SRN TIER FOR SUNDAY AS LIFT PRESENT ALONG THE FRONT AND VERY HIGH MOISTURE AND HEAT LEAD TO HIGH CAPE AND MODERATE SHEAR AGAIN SUNDAY. CLOUDS AND THE COOLER AIR ON THE WHOLE WILL CHOP 10 TO 15F OFF SUNDAY HIGHS VS SATURDAY. && .LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/... A WELCOME RETURN TO NEAR TO SLIGHTLY BELOW NORMAL TEMPERATURES AND LOWER HUMIDITY IS IN STORE FOR EARLY NEXT WEEK...AS THE UPPER LEVEL RIDGE RETROGRADES TO THE SW UNITED STATES AND A TROF DIGS INTO THE NORTHEAST. 12Z GEFS SHOWS THE RIBBON OF HIGHER PWATS ALONG AND AHEAD OF THE FRONT SLOWING DOWN AND STALLING JUST SOUTH OF THE AREA EARLY NEXT WEEK. HELD ON TO SLIGHTLY HIGHER POPS INTO MONDAY ACROSS FAR SOUTHERN PA. MODELS ARE HINTING AT A DEVELOPING BERMUDA HIGH IN THE WESTERN ATLANTIC BY LATE NEXT WEEK...WHICH COULD LEAD TO A GRADUAL INCREASE HEAT AND HUMIDITY HEADING TOWARDS NEXT WEEKEND. && .AVIATION /13Z SATURDAY THROUGH WEDNESDAY/... LIGHT HAZE WITH VSBYS OF 6-7SM WILL LINGER FOR MUCH OF THE DAY... ESP ACROSS SRN AIRFIELDS. THE REST OF SATURDAY WILL FEATURE WIDESPREAD VFR CONDS AND AN INCREASINGLY GUSTY WEST WIND. BUFKIT SOUNDINGS SUPPORT AFTN GUSTS BTWN 20-25KTS ACROSS THE NORTHERN HALF OF THE STATE. COLD FRONT DROPPING SOUTH INTO PA WILL SUPPORT AT LEAST SCT TSRA THIS AFTN/EVE...STARTING ACROSS THE NORTH AND MOVING SWD THROUGH THE AFTN. OUTLOOK... SUN...ISOLD THUNDERSTORM IMPACTS...MAINLY SOUTH. MON- WED...NO SIG WX EXPECTED. && .CLIMATE... REC MAXES FOR SAT THE 7TH ARE 101F SET IN THE HOT SUMMER OF 1988 AT BOTH MDT AND IPT. THICKNESSES OF 582DAM...8H TEMPS IN THE M20S...700H TEMPS OVER 12C...SUNSHINE AND A LIGHT WESTERLY DOWNSLOPE WIND WILL PUT THOSE RECORDS IN JEOPARDY. OTHER RECORDS OF NOTE FOR 7 JULY... 99F ALTOONA 98F STATE COLLEGE 93F BRADFORD 100F YORK 3SSW && .CTP WATCHES/WARNINGS/ADVISORIES... HEAT ADVISORY FROM NOON TODAY TO 6 PM EDT THIS EVENING FOR PAZ019-025>028-034-035-045-046-049>053-058. EXCESSIVE HEAT WARNING FROM NOON TODAY TO 6 PM EDT THIS EVENING FOR PAZ036-056-057-059-063>066. && SYNOPSIS...DANGELO/LAMBERT NEAR TERM...LAMBERT SHORT TERM...DANGELO LONG TERM...EVANEGO AVIATION...GARTNER CLIMATE...LAMBERT
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 237 PM EDT SAT JUL 7 2012 PAZ004>006-010>012-017-018-024-037-041-042-081845- WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD- NORTHERN CENTRE-CAMBRIA-TIOGA-NORTHERN LYCOMING-SULLIVAN- 237 PM EDT SAT JUL 7 2012 ...SEVERE THUNDERSTORM WATCH 477 IN EFFECT UNTIL 7 PM EDT THIS EVENING... 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/STATECOLLEGE ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SEVERE THUNDERSTORM WATCH. ONE OR TWO LINES OF THUNDERSTORMS WILL PUSH SOUTH THROUGH THE REGION THIS AFTERNOON INTO EARLY THIS EVENING. SOME OF THESE STORMS COULD BECOME SEVERE AND PRODUCE DAMAGING WINDS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. PAZ019-025>028-045-046-049>053-058-081845- SOUTHERN CENTRE-BLAIR-HUNTINGDON-MIFFLIN-JUNIATA-SOUTHERN CLINTON- SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-NORTHUMBERLAND-COLUMBIA- SCHUYLKILL- 237 PM EDT SAT JUL 7 2012 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... ...SEVERE THUNDERSTORM WATCH 477 IN EFFECT UNTIL 7 PM EDT THIS EVENING... 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/STATECOLLEGE ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. HEAT ADVISORY. SEVERE THUNDERSTORM WATCH. ONE OR TWO LINE OF THUNDERSTORMS WILL MOVE SOUTH ACROSS THE REGION LATE TODAY AND THIS EVENING. SOME OF THESE STORMS COULD BECOME SEVERE AND PRODUCE DAMAGING WINDS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. PAZ033-081845- SOMERSET- 237 PM EDT SAT JUL 7 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING. ONE OR TWO LINE OF THUNDERSTORMS WILL FORM ACROSS NORTHERN PENNSYLVANIA THIS AFTERNOON AND PUSH SOUTH TOWARD THE REGION THIS EVENING. SOME OF THESE STORMS COULD BECOME SEVERE AND PRODUCE DAMAGING WINDS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS SUNDAY...MAINLY DURING THE AFTERNOON AND EARLY EVENING HOURS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. PAZ034-035-081845- BEDFORD-FULTON- 237 PM EDT SAT JUL 7 2012 ...HEAT ADVISORY IN EFFECT UNTIL 8 PM EDT THIS EVENING... 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/STATECOLLEGE ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. HEAT ADVISORY. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING. ONE OR TWO LINE OF THUNDERSTORMS WILL FORM ACROSS NORTHERN PENNSYLVANIA THIS AFTERNOON AND PUSH SOUTH TOWARD THE REGION THIS EVENING. SOME OF THESE STORMS COULD BECOME SEVERE AND PRODUCE DAMAGING WINDS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS SUNDAY...MAINLY DURING THE AFTERNOON AND EARLY EVENING HOURS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. PAZ036-056-057-059-063>066-081845- FRANKLIN-PERRY-DAUPHIN-LEBANON-CUMBERLAND-ADAMS-YORK-LANCASTER- 237 PM EDT SAT JUL 7 2012 ...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 8 PM EDT THIS EVENING... 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/STATECOLLEGE ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. EXCESSIVE HEAT WARNING. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING. ONE OR TWO LINE OF THUNDERSTORMS WILL FORM ACROSS NORTHERN PENNSYLVANIA THIS AFTERNOON AND PUSH SOUTH TOWARD THE REGION THIS EVENING. SOME OF THESE STORMS COULD BECOME SEVERE AND PRODUCE DAMAGING WINDS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS SUNDAY...MAINLY DURING THE AFTERNOON AND EARLY EVENING HOURS. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. LAMBERT
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
1102 AM EDT SAT JUL 7 2012
PAZ037-071630-
TIOGA PA-
1102 AM EDT SAT JUL 7 2012
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN TIOGA
COUNTY...
AT 1053 AM EDT...THE SOUTHWEST END OF A LINE OF STRONG THUNDERSTORMS
WAS LOCATED FROM 25 MILES NORTHEAST OF WOODHULL TO 20 MILES
NORTHWEST OF WOODHULL TO 17 MILES NORTH OF STANNARDS...MOVING
SOUTHEAST AT 55 MPH.
WIND GUSTS FROM THE NORTH TO NORTHWEST...UP TO 45 MPH AND PEA SIZE
HAIL ARE POSSIBLE WITH THESE STORMS. ALSO...EXPECT FREQUENT CLOUD TO
GROUND LIGHTNING FROM THESE STORMS AS THEY CROSS EXTREME
NORTHEASTERN TIOGA COUNTY BETWEEN 1130 AM AND 1230 PM. DO NOT STAY
IN THE OPEN NOR SEEK SHELTER UNDER TREES WHEN LIGHTNING
THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES. THESE
STORMS WILL AFFECT ELKLAND...TIOGA JUNCTION AND ROSEVILLE.
THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6 NEAR THE
BRADFORD COUNTY LINE...ROUTE 15 FROM TIOGA TO LAWRENCEVILLE.
LAT...LON 4199 7692 4194 7690 4177 7689 4177 7690
4200 7735 4200 7693
FORECASTER: LAMBERTSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
152 PM EDT SAT JUL 7 2012
PAZ005-006-037-071915-
MCKEAN PA-POTTER PA-TIOGA PA-
152 PM EDT SAT JUL 7 2012
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN
MCKEAN...NORTHERN POTTER AND TIOGA COUNTIES BETWEEN 215 PM AND 315
PM EDT...
AT 146 PM EDT...A LINE OF STRONG THUNDERSTORMS EXTENDED FROM NEAR
ANGELICA...TO LITTLE VALLEY...AND SINCLAIRVILLE IN SOUTHERN NEW
YORK. THIS LINE OF STORMS WAS MOVING QUICKLY TO THE SOUTHEAST AT...
MOVING SOUTHEAST AT 35 MPH AND WILL MOVE TO NEAR THE
PENNSYLVANIA...NEW YORK BORDER AROUND 215 PM...THEN SOUTH OF ROUTE 6
BETWEEN 230 PM AND 315 PM.
THIS LINE OF STORMS WILL LIKELY CONTINUE TO GRADUALLY INTENSIFY AND
MAY BECOME SEVERE OVER THE NEXT HOUR.
WIND GUSTS TO 50 MPH AND PEA TO MARBLE SIZE HAIL ARE POSSIBLE WITH
THESE STORMS. EXPECT FREQUENT...DANGEROUS CLOUD TO GROUND LIGHTNING
FROM THESE STORMS. DO NOT STAY IN THE OPEN NOR SEEK SHELTER UNDER
TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A THUNDERSTORM
APPROACHES. THESE STORMS WILL AFFECT GENESEE...ELKLAND...COUDERSPORT
AND ROULETTE.
THIS WILL IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 6...ROUTE 15...
ROUTE 219...STATE ROAD 46...STATE ROAD 59...STATE ROAD 446...STATE
ROAD 449.
LAT...LON 4174 7688 4170 7688 4164 7726 4168 7839
4200 7892 4201 7732
FORECASTER: LAMBERTThe Buffalo radar (KBUF), 113 km away, was scanning. The volume nearest the first event began at 18:41 UTC.
28 thunderstorm wind, 14 hail. Local standard time, as filed.
Thunderstorm winds estimated near 60 mph knocked down trees in Duke Center.
Quarter size hail reported in Port Allegany.
Quarter size hail reported northwest of Ulysses.
Golf ball size hail reported in Turtlepoint.
Thunderstorm winds estimated near 75 mph knocked down several large trees and limbs in Ulysses.
Thunderstorm winds estimated near 60 mph knocked down numerous trees and utility wires between Wellsboro and Galeton.
Thunderstorm winds estimated near 60 mph knocked down trees in Liberty Township near Blossburg.
Thunderstorm winds estimated near 60 mph knocked down trees in Renovo.
Thunderstorm winds estimated near 60 mph knocked down trees Loyalsockville.
Thunderstorm winds estimated near 60 mph knocked down numerous trees in Picture Rocks.
Nickel size hail reported in Williamsport.
Thunderstorm winds estimated near 60 mph knocked down trees and utility wires at the intersection of Sheridan and Eldred Streets in Williamsport. Some trees fell on houses causing structural damage.
Quarter size hail reported in Williamsport.
The Williamsport Regional Airport ASOS (KIPT) recorded a peak thunderstorm wind gust of 50 knots or 58 mph.
Penny size hail reported in Montoursville.
Thunderstorm winds estimated near 60 mph knocked down trees in Watsontown. One tree fell onto a car.
Thunderstorm winds estimated near 60 mph knocked down numerous trees across the northern part of Columbia county, including the Benton area.
Thunderstorm winds estimated near 60 mph knocked down trees and large limbs near Howard.
Thunderstorm winds estimated near 60 mph knocked down trees and utility wires near Mifflinburg. One person was injured by the live wires.
Thunderstorm winds estimated near 60 mph knocked down numerous trees in Ryan and Rush Townships near Tamaqua.
Thunderstorm winds estimated near 60 mph knocked down trees in Pine Grove Township.
Penny size hail reported in Pine Grove.
Thunderstorm winds estimated near 60 mph knocked down trees in Troutville.
Thunderstorm winds estimated near 60 mph knocked down over 100 trees south of Altoona near Hollidaysburg.
Penny size hail reported in Lebanon.
Thunderstorm winds estimated near 60 mph knocked down trees near Birdville.
Thunderstorm winds estimated near 60 mph knocked down trees and utility wires in Newport.
Penny size hail reported near Amity Hall.
Thunderstorm winds estimated near 60 mph knocked down trees just south of Mount Union.
Thunderstorm winds estimated near 60 mph knocked down trees and wires in East Waterford.
Thunderstorm winds estimated near 60 mph knocked down trees and utility wires near Honey Grove.
Thunderstorm winds estimated near 60 mph knocked down trees and utility wires near Port Royal.
Thunderstorm winds estimated near 60 mph knocked down trees and utility wires in Shermansdale.
Thunderstorm winds estimated near 60 mph knocked down trees and large branches in York.
Penny size hail reported in Lawnton.
Thunderstorm winds estimated near 60 mph knocked down trees in York.
Thunderstorm winds estimated near 60 mph knocked down trees in Columbia.
Thunderstorm winds estimated near 60 mph uprooted a tree and damaged a gazebo and shed in Millersville.
Quarter size hail reported in Lancaster.
Half-dollar size hail reported in Lancaster.
Penny size hail reported in Lancaster.
Dime to quarter size hail reported in Strasburg.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2012Every state in 2012This day in weather historyWarnings in Pennsylvania, July 2012
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: 382131, 382120, 382121, 382122, 382132, 382133, 382134, 382135, 382136, 382137, 382123, 382138, 382124, 382141, 382125, 382145, 382146, 382153, 382147, 382154, 382155, 382126, 382142, 382156, 382127, 382143, 382157, 382128, 382160, 382149, 382150, 382151, 382158, 382449, 382129, 382152, 382159, 382161, 382445, 382447, and more.