Isolated severe thunderstorms produced localized wind damage in Cumberland and Adams Counties.
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.
Isolated severe thunderstorms produced localized wind damage in Cumberland and Adams 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 5, 4:30 PM EST, 0 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 530 PM EDT THU JUL 5 2012 .SYNOPSIS... HOT SUMMERTIME WEATHER WILL PREVAIL ACROSS CENTRAL PENNSYLVANIA INTO THE WEEKEND. A COLD FRONT WILL DROP SOUTHWARD THROUGH THE KEYSTONE STATE LATE SUNDAY...WITH MORE IN THE WAY OF NORMAL TEMPERATURES FOR NEXT WEEK. MONDAY INTO WED LOOKS TO BE MAINLY DRY FOR NOW...BUT THE LATER PART OF NEXT WEEK COULD SEE A RETURN TO MORE HUMID CONDITIONS WITH A CHANCE OF SHOWERS AND STORMS. && .NEAR TERM /UNTIL 11 PM THIS EVENING/... A WEAKENING COLD FRONT IS MOVING INTO NORTHERN PA EARLY THIS AFT...ACCOMPANIED BY A WIND SHIFT TO THE NW AND A DROP IN DWPTS. ALL MDL DATA STALLS THIS FRONT OUT ACROSS SOUTHWEST PA LATER TODAY. THIS BOUNDARY...ALONG NE PERIPHERY OF EXPANSIVE SOUTH- CENTRAL U.S. UPPER RIDGE...WILL SERVE AS THE FOCUS FOR TSRA INTO THIS EVENING. SOME NEW STORMS FORMING OVER SOUTHERN MI AT THE CURRENT TIME. EXPECT MOST OF THESE TO STAY SW OF OUR AREA...BUT SOME COULD CLIP THE SW PART OF THE CWA...HIGHEST POPS HERE THIS EVENING. && .SHORT TERM /11 PM THIS EVENING THROUGH 6 PM FRIDAY/... ANY TSRA ACROSS THE S TIER SHOULD DISSIPATE BY LATE EVENING... AS TEMPS COOL. WITH SLIGHTLY LOWER DEWPOINTS IN PLACE...AS WEAK HIGH PRESSURE TRIES TO BUILD SOUTHWARD FROM SOUTHERN ONTARIO... THIS SHOULD ALLOW TEMPS TO BE COOLER THAN LAST NIGHT. MANY SPOTS LAST NIGHT STAYED WELL INTO THE 70S. TEMPS WILL BE HOT ON FRIDAY. HEAT ADVISORIES MAY BE NEEDED ACROSS THE SOUTH. LIMITING FACTOR WILL BE THE DEWPOINT. TEMPS SATURDAY MAY BE HOT ENOUGH ACROSS THE SE TO BE IN ADVISORY LEVEL...EVEN IF DEWPOINTS ARE NOT THAT HIGH...SEE LONG TERM SECTION BELOW. AT THIS POINT...EXPECT TEMPS AT MID LVLS TO CAP OFF ANY SHOWERS OR STORMS ON FRIDAY. && .LONG TERM /FRIDAY NIGHT THROUGH THURSDAY/... SHORTWAVE TROUGH EMBEDDED WITHIN BELT OF STRONGER WLYS CONFINED TO THE U.S./CANADIAN BORDER WILL MOVE THROUGH ONTARIO AND QUEBEC BEFORE TURNING SEWD INTO THE NERN STATES FRIDAY NIGHT INTO SATURDAY. THIS FEATURE WILL BREAK DOWN/FLATTEN THE NERN PERIPHERY OF THE HOT UPPER RIDGE IN THE CENTRAL PLAINS AND FORCE A SFC COLD FRONT SEWD THRU PA BY LATE SUNDAY. MODELS SHOW MUCH OF THE SHOWER AND THUNDERSTORM ACTIVITY TO BE BEHIND THE FRONT. STILL WOULD EXPECT STORMS TO FORM AHEAD OF THE FRONT. THE D3 SPC CONVECTIVE OUTLOOK PLACES THE AREA IN A CATEGORICAL SLIGHT RISK...WITH POTENTIAL FOR STRONG TO SEVERE THUNDERSTORM DEVELOPMENT IN MOIST/UNSTABLE AIR MASS ALONG/AHEAD OF SWD ADVANCING COLD FRONT. THE D3 /SAT/ OUTLOOK COVERS THE ENTIRE CWA. THE HEAT WILL PEAK ON SATURDAY WITH 850MB TEMPS OF +20-25C SUPPORTING NEAR RECORD TEMPERATURES IN THE LOW-MID 90S IN THE WEST/CENTRAL COUNTIES...TO AROUND 100F IN THE SE/LWR SUSQ VLY. TABULAR ECM NUMBERS ARE A FEW DEGREES WARMER THAN THE GFS...AND HAVE LEANED IN THAT DIRECTION. HEAT INDEX VALUES /APPROACHING OR EXCEEDING THE CENTURY MARK/ WILL ALSO BE A CONCERN THRU THE PERIOD AND HAVE HIGHLIGHTED THIS (ALONG WITH THE D3 SLIGHT RISK) IN THE HWO. HEAT ADVISORIES MAY BE NEEDED FOR SAT PARTICULARLY IN THE SOUTHEAST ZONES. ABOVE AVERAGE CONFIDENCE EXISTS IN A PATTERN SHIFT TOWARD A POSITIVE PNA CONFIGURATION...AS THE HOT CENTRAL CONUS UPPER RIDGE RETROGRADES WWD AND UPPER TROUGH AMPLIFIES IN THE NERN U.S. THIS WILL BRING A COOL DOWN IN TEMPERATURES TO SEASONAL CLIMATE NORMALS AND PROVIDE RELIEF FROM THE RECENT STRETCH OF HIGH HEAT AND HUMIDITY. && .AVIATION /22Z THURSDAY THROUGH TUESDAY/... MAIN AVIATION CONCERN FOR THIS EVENING IS A NARROW LINE OF SCATTERED STORMS FROM NEAR CLEARFIELD SE TO ABOUT YORK. SOME OF THESE COULD WANDER OVER A TERMINAL AND CAUSE BRIEF IFR WITH A DOWNPOUR AND GUSTY WINDS. OTHERWISE...HIGH PRESSURE AND ASSOCIATED DRY AIR MASS PASSING ACROSS UPSTATE NY AND NORTHERN PA WILL PRODUCE MAINLY VFR CONDS ACROSS THE REGION. HOWEVER...THE SOUTHERN HALF OF THE STATE...WHERE DEWPOINTS ARE HIGHER...WILL REMAIN SUSCEPTIBLE TO A BRIEF TSRA. OUTLOOK... FRI...NO SIG WX EXPECTED. SAT...SCT PM THUNDERSTORM IMPACTS POSS. SUN...SCT THUNDERSTORM IMPACTS POSS...ESP SOUTH. MON...ISOLATED SHOWER OR THUNDERSTORM POSSIBLE ACROSS THE SOUTH EARLY...OTHERWISE NO SIG WX EXPECTED. TUE...NO SIG WX EXPECTED. && .CTP WATCHES/WARNINGS/ADVISORIES... NONE. && SYNOPSIS...MARTIN/STEINBUGL NEAR TERM...FITZGERALD/GARTNER/MARTIN SHORT TERM...MARTIN/STEINBUGL LONG TERM...MARTIN/STEINBUGL AVIATION...LA CORTE/MARTIN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 1255 PM EDT THU JUL 5 2012 PAZ004>006-010>012-017>019-024>027-033>037-041-042-045-061700- WARREN-MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-CLEARFIELD- NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR-HUNTINGDON-MIFFLIN- SOMERSET-BEDFORD-FULTON-FRANKLIN-TIOGA-NORTHERN LYCOMING-SULLIVAN- SOUTHERN CLINTON- 1255 PM EDT THU JUL 5 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. AN APPROACHING COLD FRONT COULD PRODUCE STRONG THUNDERSTORMS LATE SATURDAY. THERE IS A SLIGHT CHANCE THAT SOME OF THESE STORMS COULD CONTAIN DAMAGING WIND GUSTS OR LARGE HAIL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. PAZ028-046-049>053-056>059-063-066-061700- JUNIATA-SOUTHERN LYCOMING-UNION-SNYDER-MONTOUR-NORTHUMBERLAND- COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL-LEBANON-CUMBERLAND-LANCASTER- 1255 PM EDT THU JUL 5 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. HEAT INDEX VALUES WILL BE NEAR 100 DEGREES ON FRIDAY. THE HEAT WILL PEAK ON SATURDAY WITH HEAT INDEX VALUES LIKELY EXCEEDING 100 DEGREES. AN APPROACHING COLD FRONT COULD PRODUCE STRONG THUNDERSTORMS LATE SATURDAY. THERE IS A SLIGHT CHANCE THAT SOME OF THESE STORMS COULD CONTAIN DAMAGING WIND GUSTS OR LARGE HAIL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. PAZ064-065-061700- ADAMS-YORK- 1255 PM EDT THU JUL 5 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THROUGH THIS EVENING. THE PRIMARY THREATS WILL BE DAMAGING WINDS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. HEAT INDEX VALUES WILL BE NEAR 100 DEGREES ON FRIDAY. THE HEAT WILL PEAK ON SATURDAY WITH HEAT INDEX VALUES LIKELY EXCEEDING 100 DEGREES. AN APPROACHING COLD FRONT COULD PRODUCE STRONG THUNDERSTORMS LATE SATURDAY. THERE IS A SLIGHT CHANCE THAT SOME OF THESE STORMS COULD CONTAIN DAMAGING WIND GUSTS OR LARGE HAIL. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE REQUESTED TO RELAY REPORTS OF SEVERE WEATHER...INCLUDING DAMAGING WINDS...HAIL AND HEAVY RAIN TO THE NATIONAL WEATHER SERVICE. GARTNER
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
504 PM EDT THU JUL 5 2012
PAZ056-063-052200-
CUMBERLAND PA-PERRY PA-
504 PM EDT THU JUL 5 2012
...A STRONG THUNDERSTORM WILL AFFECT CENTRAL CUMBERLAND AND SOUTH
CENTRAL PERRY COUNTIES...
AT 456 PM EDT...A STRONG THUNDERSTORM WAS NEAR LOYSVILLE...MOVING
SOUTHEAST AT 10 MPH.
WIND GUSTS TO 30 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.
THIS STORM WILL AFFECT BLOSERVILLE...CARLISLE SPRINGS AND CARLISLE.
THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 218 AND 230...I-81 BETWEEN
MILE MARKERS 41 AND 55.
THIS WILL ALSO IMPACT ROUTE 11.
LAT...LON 4024 7703 4010 7728 4034 7739 4040 7738
4039 7733
FORECASTER: DEVOIRSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE STATE COLLEGE PA
515 PM EDT THU JUL 5 2012
PAZ063>065-052145-
ADAMS PA-CUMBERLAND PA-YORK PA-
515 PM EDT THU JUL 5 2012
...A STRONG THUNDERSTORM WILL AFFECT CENTRAL CUMBERLAND...
NORTHEASTERN ADAMS AND NORTHWESTERN YORK COUNTIES...
AT 505 PM EDT...A THUNDERSTORM WAS NEAR BLOSERVILLE...MOVING
SOUTHEAST AT 20 MPH.
WIND GUSTS TO 30 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM.
THIS STORM WILL AFFECT BOILING SPRINGS...MOUNT HOLLY SPRING AND YORK
SPRINGS.
THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES...THE
PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 217 AND 223...I-81 BETWEEN
MILE MARKERS 40 AND 47.
THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 11...ROUTE
15...STATE ROAD 94.
LAT...LON 4003 7694 3991 7717 4020 7734 4026 7732
4025 7726
FORECASTER: DEVOIRThe national radar mosaic for the moment the first event began.
4 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds estimated near 60 mph snapped approximately 20 trees at a campground near Ryde.
Thunderstorm winds estimated near 60 mph knocked down trees near York Springs in Huntington Township.
Thunderstorm winds estimated near 60 mph knocked down trees and utility wires in Newburg.
Thunderstorm winds estimated near 60 mph knocked down a tree on a house, causing moderate damage to the roof.
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: 382163, 381164, 381165, 381166.