producing penny to quarter sized hail and wind damage. which sustained partial roof damage to a building on the eastern section of the Depot.
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.
Pulse severe thunderstorms developed in a warm and humid airmass over Central Pennsylvania...producing penny to quarter sized hail and wind damage. An apparent funnel cloud was also sited near the Letterkenny Army Depot in Franklin county...which sustained partial roof damage to a building on the eastern section of the Depot.
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 29, 1:15 AM EST, 32 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 215 AM EDT SUN JUL 29 2007 .SYNOPSIS... THE LARGE-SCALE TROUGH THAT HAS PERSISTED OVER THE EASTERN US FOR SEVERAL DAYS WILL GRADUALLY LIFT OUT BY EARLY NEXT WEEK WITH WARMER AND DRIER WEATHER IN STORE FOR THE MIDDLE OF NEXT WEEK. UNTIL THEN...EXPECT SCATTERED...MAINLY AFTERNOON SHOWERS AND THUNDERSTORMS. THE GREATEST THREAT FOR THESE SHOWERS WILL BE ACROSS THE SOUTHERN AND EASTERN ZONES...CLOSE TO A WEAK FRONTAL BOUNDARY CURRENTLY MOVING SLOWLY THROUGH THE STATE THAT WILL STALL OFF TO OUR SOUTHEAST. && .NEAR TERM /UNTIL 7 AM THIS MORNING/... EARLIER TSTORM ACTIVITY HAS DIED DOWN SIGNIFICANTLY...EXCEPT FOR ONE CLUSTER NEAR THE MD BORDER. THIS CLUSTER IS PROGGED TO SLIP EAST AND SLIGHTLY NORTH THROUGH THE NIGHT...AND WILL KEEP THE HIGHEST POPS FROM FRANKLIN COUNTY EASTWARD. THE INSTABILITY HAS DECREASED ACROSS THE REST OF THE AREA...BUT A STRAY SHOWER IS STILL NOT OUT OF THE QUESTION. FOG MAY AGAIN BECOME LOCALLY DENSE LATE TONIGHT...MAINLY WHERE IT RAINED EARLIER TODAY. SOME STRATUS IS AGAIN POSSIBLE...SO WILL NOT TOTALLY CLEAR IT OUT...EVEN IN THE NORTH. && .SHORT TERM /7 AM THIS MORNING THROUGH 6 AM MONDAY/... PWAT/MOISTURE BOUNDARY SUNDAY IS OVER SSE PA SUGGESTING LOWER POPS ON SUNDAY FOR MOST PLACES THAN PREVIOUS FORECASTS. HIGHEST POPS SHOULD BE IN SOUTHEASTERN-MOST AREAS. IT APPEARS THE PWAT VALUES SLOWLY DECREASE AND ARE NEAR NORMAL OVER MOST OF CENTRAL AND WESTERN PA...WHICH SHOULD DECREASE CHCS FOR PRECIP ACROSS THE N/W. THE DRIER/LOWER-PWAT AIR CONTINUES TO DRAIN IN SUNDAY EVENING AND POPS DECREASE OVERNIGHT INTO EARLY MONDAY. && .LONG TERM /MONDAY THROUGH SATURDAY/... Q-STNRY FNTL BNDRY IS FCAST TO REMAIN NEAR/ALONG THE I-95 CORRIDOR EARLY MONDAY WITH LINGERING SHRA/TSRA MAINLY OVER THE SOUTHEAST 1/2 TO 1/3 OF THE CWA WHERE PRECIPITABLE WATER VALUES /PWATS/ REMAIN ABOVE NORMAL. HAVE PLACED HIGHEST /CHC/ POPS ACROSS THE LWR SUSQ VLY WHICH AGREES WITH THE LATEST MODEL GUIDANCE AND SHORT TERM ENSEMBLE OUTPUT. DECREASED POPS FROM NW TO SE OVERNIGHT MONDAY INTO TUE AS SFC HIGH PRESSURE PUSHES IN FROM THE LOWER GRT LKS. PWATS RETURN TO NORMAL ON TUESDAY AS SFC HI PRES /LOCATED DOWNSTREAM OF PLAINS MID/UPR LVL RIDGE AXIS/ CONTINUES TO SLIDE EWD FROM THE UPR OH VLY...PUSHING THE AFOREMENTIONED Q-STNRY BNDRY FURTHER SOUTH AND EAST INTO THE SRN MID-ATLANTIC STATES/OFFSHORE. ALOFT...PESKY MID/UPR LVL TROF AND ASSOC COOL POOL FINALLY APPEARS TO BE SHUNTED EWD WITH ANOMALOUS H5 HEIGHTS BUILDING EWD ACROSS THE UPR MIDWEST/GRT LKS. MODELS/EPS HAVE TRENDED DRIER COMPARED TO YESTERDAY/00Z RUNS AND THUS HAVE REMOVED POPS FOR TUE. THIS AGREES WITH PREVIOUS LONG TERM THINKING AS PWAT VALUES DROP AOB 1 INCH. TUE-WED SHOULD FEATURE DRY AND WARM CONDS WITH MAX TEMPS TOPPING OUT AOA NORMAL...IN THE LOW/MID 80S WEST TO MID/UPR 80S EAST. HAVE USED MANUAL BLEND OF ENS MOS/GMOS/HPC FOR TEMPS. SFC RIDGE AXIS IS FCAST TO CROSS THE REGION THUR WITH RETURN FLOW SETTING UP FROM THE SW. GEFS INDICATES ABOVE NORMAL HEIGHTS EXTENDING FROM THE UPPER PLAINS AND INTO THE NORTHEAST BY THIS TIME. INCREASING HEAT/HUMIDITY WILL TRANSLATE INTO DAILY SCHC/CHC FOR MAINLY AFTN CONVECTION AND HAVE POPS AOB 25 PCT THUR-SUN. HPC SFC PROGS SHOW A WEAK CLD FNTL BNDRY DROPPING SWD THRU THE STATE FRI-SAT...WHICH MAY ACT AS MORE OF A FOCUS FOR CONVECTION. HOWEVER...TIMING WILL CERTAINLY NEED TO BE RESOLVED AS STILL LOTS OF UNCERTAINTY THIS FAR OUT. && .AVIATION /06Z SUNDAY THROUGH THURSDAY/... WILL KEEP THIS SHORT...AS STORMS OVER THE SE ARE WEAKENING SOME...BUF STILL SOME CONCERN OVER FLASH FLOODING. MAINLY MVFR CONDITIONS TODAY INTO MONDAY...AS HIGH DEWPOINTS WORKED BACK TO THE NORTH ON SAT...AFTER SQUALL LINE ON FRIDAY CLEARED THE AREA OUT. SOME IFR CONDITIONS AT TIMES...MAINLY AT NIGHT WITH FOG. THERE MAY BE A FEW HOURS OF VFR CONDITIONS EACH DAY...MAINLY ACROSS THE NORTHERN PART OF THE STATE. AFTER MONDAY...THE REMAINDER OF THE WEEK WILL BRING DRIER WEATHER AND IMPROVED FLYING CONDITIONS. && .CTP WATCHES/WARNINGS/ADVISORIES... NONE. && SYNOPSIS...GRUMM/DANGELO NEAR TERM...GRUMM/DANGELO SHORT TERM...GRUMM/DANGELO LONG TERM...STEINBUGL AVIATION...RXR/MARTIN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 445 AM EDT SAT JUL 28 2007 PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053- 056>059-063>066-290845- WARREN-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- 445 AM EDT SAT JUL 28 2007 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.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 952 PM EDT SAT JUL 28 2007 PAZ036-064-290215- ADAMS-FRANKLIN- 952 PM EDT SAT JUL 28 2007 ...STRONG THUNDERSTORMS WILL AFFECT SOUTHEASTERN FRANKLIN AND SOUTHWESTERN ADAMS COUNTIES... AT 948 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED AN AREA OF STRONG THUNDERSTORMS ALONG THE MARYLAND BORDER NEAR WAYNESBORO...MOVING SLOWLY NORTH. WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS. VERY HEAVY RAIN WILL FALL...AND MAY CAUSE WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. FORECASTER: DANGELO
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE STATE COLLEGE PA
958 PM EDT SAT JUL 28 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0535 PM HAIL YORK 39.96N 76.73W
07/28/2007 E0.75 INCH YORK PA PUBLIC
0540 PM HAIL YORK 39.96N 76.73W
07/28/2007 E0.75 INCH YORK PA PUBLIC
0545 PM HAIL YORK 39.96N 76.73W
07/28/2007 E0.75 INCH YORK PA PUBLIC
0545 PM HAIL YORK 39.96N 76.73W
07/28/2007 E0.88 INCH YORK PA PUBLIC
0545 PM TSTM WND DMG 1 SW YORK 39.95N 76.75W
07/28/2007 YORK PA LAW ENFORCEMENT
WIRES DOWN/POWER OUTAGES IN SWRN PART OF YORK CITY
0710 PM HAIL 2 S MANHEIM 40.13N 76.40W
07/28/2007 E0.88 INCH LANCASTER PA PUBLIC
0710 PM TSTM WND DMG 2 S MANHEIM 40.13N 76.40W
07/28/2007 LANCASTER PA PUBLIC
CORN/CROP DAMAGE
0800 PM TSTM WND DMG NEWVILLE 40.17N 77.40W
07/28/2007 CUMBERLAND PA LAW ENFORCEMENT
TREES DOWN BETWEEN NEWVILLE AND PLAINFIELD.
&&
CJESPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 145 AM EDT SUN JUL 29 2007 PAZ066-290615- LANCASTER- 145 AM EDT SUN JUL 29 2007 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL LANCASTER COUNTY... AT 138 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 3 MILES SOUTHWEST OF MILLERSVILLE...MOVING EAST AT 5 MPH. LOCALLIZED WIND GUSTS TO 50 MPH AND SMALL HAIL ARE POSSIBLE UNDER THIS STORM. THIS STORM WILL BE NEAR MILLERSVILLE AROUND 200 AM...LANCASTER AND WILLOW STREET AROUND 215 AM. FORECASTER: KF
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 158 AM EDT SUN JUL 29 2007 PAZ026-290630- HUNTINGDON- 158 AM EDT SUN JUL 29 2007 ...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN HUNTINGDON COUNTY... AT 155 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 21 MILES NORTHEAST OF BREEZEWOOD...MOVING NORTHEAST AT 5 MPH. WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM. EXPECT INTENSE LIGHTNING FROM THIS STORM. DO NOT SEEK SHELTER UNDER TREES WHEN LIGHTNING THREATENS...MOVE INDOORS WHEN A THUNDERSTORM APPROACHES. THIS STORM WILL BE NEAR SHADE GAP AROUND 215 AM...ORBISONIA AROUND 225 AM AND SHIRLEYSBURG AROUND 230 AM. FORECASTER: KF
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 247 AM EDT SUN JUL 29 2007 PAZ028-056-290715- JUNIATA-PERRY- 247 AM EDT SUN JUL 29 2007 ...A STRONG THUNDERSTORM APPROACHING SOUTHWESTERN JUNIATA AND SOUTHWESTERN PERRY COUNTIES... AT 241 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 20 MILES NORTHWEST OF SHIPPENSBURG...MOVING NORTHEAST AT 10 MPH. LOCALLY STRONG WIND GUSTS AND SMALL HAIL ARE POSSIBLE WITH THIS STORM. THIS STORM WILL BE NEAR BIG SPRING STATE PARK AND PERULACK AROUND 315 AM. FORECASTER: KF
The State College radar (KCCX), 77 km away, was scanning. The volume nearest the first event began at 06:45 UTC.
5 thunderstorm wind, 3 hail, 2 funnel cloud. Local standard time, as filed.
Huntingdon county emergency manager reported large tree limbs down in Orbisonia.
Several public reports of a funnel cloud were received by the Franklin county 911 center. Images of the apparent funnel cloud were captured by the Franklin county Fire Company. According to eyewitnesses, the funnel cloud did not touch the ground.
Franklin county emergency management/911 center reported partial roof damage to two buildings located on the eastern section of Letterkenny Army Depot.
Trained spotter reported a funnel cloud in the vicinity of the Letterkenny Army Depot.
Public reported nickel sized hail in Shamokin.
Public reported quarter sized hail in Greencastle.
Lebanon county law enforcement reported trees down in Lebanon. A highway sign was also damaged.
Dauphin county law enforcement reported trees down in Linglestown. Wires were also reported down between Linglestown and Harrisburg.
Public reported penny sized hail in Bainbridge.
Public reported trees down approximately 2 miles west of York in West Manchester Township.
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, July 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: 37815, 37037, 37816, 37038, 37812, 37813, 37817, 37818, 37814, 37819.