A weak cold front encountered a very warm and unstable atmosphere which resulted in scattered severe pulse-type storms.
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 weak cold front encountered a very warm and unstable atmosphere which resulted in scattered severe pulse-type storms.
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 Aug 3, 1:43 PM EST, 1 hour 3 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE STATE COLLEGE PA 243 PM EDT FRI AUG 3 2007 .SYNOPSIS... A COLD FRONT WILL PUSH THROUGH CENTRAL PENNSYLVANIA THIS AFTERNOON AND INTO TONIGHT WITH SCATTERED SHOWERS AND THUNDERSTORMS POSSIBLE. THE FRONTAL SYSTEM WILL BECOME NEARLY STATIONARY JUST SOUTH OF THE COMMONWEALTH OVER THE WEEKEND...THEN RETURN NORTHWARD THROUGH THE STATE ON MONDAY AS A WARM FRONT. THIS FRONT WILL WAVER NEAR OR JUST NORTH OF PENNSYLVANIA THROUGH LATE NEXT WEEK...WHICH MAY RESULT IN PERIODS OF UNSETTLED WEATHER. && .NEAR TERM /UNTIL 11 PM THIS EVENING/... UPDATE FOR SVR THUNDERSTORM WATCH #560 VALID UNTL 10PM. LATEST VISIBLE SAT IMAGERY ALREADY SHOWING GROWING CU FIELD MOVG PARALLEL WITH THE LLVL FLOW...SIGNALING ATM IS BECOMING INCREASINGLY UNSTABLE. INSTABILITY IS FCAST TO INCREASE THROUGH THE MID/LATE AFTN HOURS AHEAD OF APPROACHING COLD FRONT...WITH THE RUC/NAM SHOWING 1500-2500J/KG OF MLCAPE ACROSS THE WESTERN AND CENTRAL MTNS DURING PEAK HEATING. LATEST SPC DY1 SLIGHT RISK HAS MIGRATED SWWD BACK INTO THE FAR NRN/NERN PA PART OF MY CWA...WHICH LOOKS GOOD BASED ON MY PLACEMENT OF UPDATED /HIGHER/ POPS OVER THIS AREA. ALTHOUGH DEEP LYR WIND FIELD REMAINS FAIRLY WEAK AND LLVL CONVERGENCE PROGGED BY THE MODELS ALONG/AHEAD OF THE COLD FRONT LOOKS MEAGER...MODEST 25-35KT MID LVL UNIDIRECTIONAL FLOW COMBINED WITH FAIRLY STEEP LOW/MID LVL LAPSE RATES SHOULD RESULT INCREASING CONVECTIVE ACTIVITY FOR THIS AFTN. LATEST RADAR SHOWING CELLS BREAKING OUT ALONG THE PA/NY BORDER AND EXTENDING SWWD ALONG THE ALLEGHENY PLATEAU. EXPECT THIS ACTIVITY TO CONTINUE TO STRENGTHEN...AND POSSIBLE CONSOLIDATE INTO A LINE OF STRONG/POTENTIALLY SVR CONVECTION THROUGH LATE THIS AFTN. MAIN THREATS WITH ANY SVR STORMS WOULD BE DAMAGING WINDS AND HAIL. && .SHORT TERM /11 PM THIS EVENING THROUGH SUNDAY NIGHT/... SCT CONVECTION LIKELY TO LAST FOR A TIME TONIGHT ACROSS CENTRAL/SOUTHERN PA...AS COLD FRONT SAGS THRU THE AREA. SFC HIGH PRESSURE BUILDS IN FOR SAT WITH IMPROVEMENT EXPECTED FROM NW-SE. STILL QUITE WARM...BUT DEWPOINTS WILL DROP OFF A BIT MAKING FOR SLIGHTLY MORE COMFORTABLE CONDITIONS. && .LONG TERM /MONDAY THROUGH THURSDAY/... MODELS/ENSEMBLES REMAIN IN AGREEMENT ON LARGE SCALE PATTERN IN THE LONG TERM...WHICH WILL PRIMARILY FEATURE FLAT/ZONAL RIDGING ACROSS MUCH OF THE CENTRAL AND EASTERN U.S AND BROAD TROFING ALONG THE WEST COAST. GIVEN THIS FLOW REGIME...STORM TRACK WILL BE PRIMARILY ALONG/NORTH OF THE U.S. CANADIAN BORDER ON THE SRN FRINGES OF THE WESTERLIES WITH ELONGATED/Q-STNRY FNTL BNDRYS MEANDERING INVOF PA. WILL HAVE TO WATCH EMBEDDED MID LVL ENERGY/DECAYING MCS ACTIVITY TRANSLATING EWD FROM THE PLAINS /ALONG AXIS OF ABOVE NORMAL PWATS/ AND TWD THE AREA...WHICH THE OPERATIONAL GFS SEEMS TO BE HINTING AT GIVEN SEVERAL CONVECTIVE FEEDBACK INDUCED BULLSEYES. LOW PREDICTABILITY/CONFIDENCE WITH REGARD TO THESE SMALLER SCALE DETAILS ALONG WITH ANY PSBL INTERACTION WITH THE NRN STREAM FLOW SUGGESTS LOW POPS FOR MUCH OF THE EXTENDED FCAST TIMEFRAME. NEVERTHELESS...LOCAL WEATHER WILL REMAIN DOMINATED BY MID SUMMER WARMTH...CONTINUING THE STRETCH OF AOA NORMAL TEMPS INTO NEXT WEEK. && .AVIATION /19Z FRIDAY THROUGH WEDNESDAY/... CONVECTION ALONG AND PRECEDING THE WEAK COLD FRONT MOVING W-E THRU PA THIS AFTN AND EVE TMPRLY LWRG CONDS TO IFR IN TSTMS AND GSTY SFC WNDS. OVRALL VFR SKIES XCP AREAS MVFR VSBYS IN HAZE IN AFTN AND EVE. TSTMS DSPTG LTR IN EVE WITH SKIES CLRNG AND PTCHY FOG FRMG BFR SR ESPCLY VLY LOCNS. VFR CONDS SAT AM XCP IPVG CONDS FAR SRN TIER DURG AM. VFR CONDITIONS AND LIGHT WINDS ARE LIKELY SAT AFTN THRU EARLY SUNDAY AS HIGH PRESSURE PASSES OVER THE STATE. A WARM FRONT WILL LIKELY PUSH INTO THE REGION BY SUNDAY AFTERNOON OR SUNDAY EVENING...ACCOMPANIED BY SCATTERED THUNDERSTORMS WITH LOCALLY REDUCED CIGS/VIS. UNSETTLED WEATHER WILL CONTINUE THROUGH MID WEEK...WITH SCATTERED AFTERNOON AND EVENING CONVECTION...MORE LIKELY IN CENTRAL AND NORTHERN PORTIONS OF THE REGION. && .CTP WATCHES/WARNINGS/ADVISORIES... NONE. && SYNOPSIS...FITZGERALD/STEINBUGL NEAR TERM...STEINBUGL SHORT TERM...FITZGERALD LONG TERM...FITZGERALD/STEINBUGL AVIATION...BUDD/RXR
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE STATE COLLEGE PA 103 PM EDT FRI AUG 3 2007 PAZ004-017>019-024>028-033>036-049>053-056>059-063>066-041715- WARREN-CLEARFIELD-NORTHERN CENTRE-SOUTHERN CENTRE-CAMBRIA-BLAIR- HUNTINGDON-MIFFLIN-JUNIATA-SOMERSET-BEDFORD-FULTON-FRANKLIN-UNION- SNYDER-MONTOUR-NORTHUMBERLAND-COLUMBIA-PERRY-DAUPHIN-SCHUYLKILL- LEBANON-CUMBERLAND-ADAMS-YORK-LANCASTER- 103 PM EDT FRI AUG 3 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL PENNSYLVANIA. .DAY ONE...THIS AFTERNOON AND TONIGHT THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED...BUT MAY BE NEEDED THIS AFTERNOON AND TONIGHT. PAZ005-006-010>012-037-041-042-045-046-041715- MCKEAN-POTTER-ELK-CAMERON-NORTHERN CLINTON-TIOGA-NORTHERN LYCOMING- SULLIVAN-SOUTHERN CLINTON-SOUTHERN LYCOMING- 103 PM EDT FRI AUG 3 2007 ...SEVERE THUNDERSTORM WATCH 560 IN EFFECT UNTIL 10 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. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY THE PROBABILITY OF WIDESPREAD HAZARDOUS WEATHER IS LOW. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND TONIGHT. STEINBUGL
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 226 PM EDT FRI AUG 3 2007 PAZ026-031900- HUNTINGDON- 226 PM EDT FRI AUG 3 2007 ...A STRONG THUNDERSTORM WILL AFFECT SOUTHEASTERN HUNTINGDON COUNTY... AT 225 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 19 MILES SOUTH OF HUNTINGDON...MOVING EAST AT 10 MPH. WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM. VERY HEAVY RAIN WILL FALL FROM THIS STORM...AND WILL CAUSE WATER TO POND ON ROADS AND QUICKLY FILL ROADSIDE DITCHES AND SMALL STREAMS. THIS STORM WILL BE NEAR SHADE GAP AROUND 240 PM. THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 522. FORECASTER: STEINBUGL
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 252 PM EDT FRI AUG 3 2007 PAZ034-031930- BEDFORD- 252 PM EDT FRI AUG 3 2007 ...A STRONG THUNDERSTORM WILL AFFECT EAST CENTRAL BEDFORD COUNTY... AT 248 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 7 MILES WEST OF BREEZEWOOD...MOVING EAST AT 10 MPH. WIND GUSTS TO 40 MPH AND SMALL HAIL ARE POSSIBLE WITH THIS STORM. THIS STORM WILL BE NEAR EVERETT AT 255 PM AND BREEZEWOOD AROUND 315 PM. THIS WILL IMPACT THE FOLLOWING CENTRAL PENNSYLVANIA INTERSTATES... THE PENNSYLVANIA TURNPIKE BETWEEN MILE MARKERS 150 AND 164...AND I-70 BETWEEN MILE MARKERS 147 AND 150. THIS WILL ALSO IMPACT THE FOLLOWING MAJOR ROADS...ROUTE 30. FORECASTER: RXR
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 309 PM EDT FRI AUG 3 2007 PAZ010-011-031945- CAMERON-ELK- 309 PM EDT FRI AUG 3 2007 ...A STRONG THUNDERSTORM WILL AFFECT EASTERN ELK AND WEST CENTRAL CAMERON COUNTIES... AT 304 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 2 MILES EAST OF JOHNSONBURG...MOVING EAST AT 20 MPH. THIS STORM WILL BE NEAR ST. MARYS AROUND 320 PM...TRUMAN AROUND 340 PM AND BENEZETTE AROUND 345 PM. FORECASTER: LA CORTE
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 311 PM EDT FRI AUG 3 2007 PAZ006-037-041-031945- NORTHERN LYCOMING-POTTER-TIOGA- 311 PM EDT FRI AUG 3 2007 ...STRONG THUNDERSTORMS WILL AFFECT NORTHWESTERN LYCOMING... SOUTHEASTERN POTTER AND SOUTHEASTERN TIOGA COUNTIES... AT 308 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 9 MILES SOUTH OF WEST ELMIRA TO 2 MILES EAST OF WELLSBORO TO 19 MILES SOUTHWEST OF WELLSBORO...MOVING SOUTHEAST AT 30 MPH. THESE STORMS WILL BE NEAR MORRIS AROUND 320 PM...SLATE RUN AROUND 325 PM...OGDENSBURG AROUND 340 PM AND LITTLE PINE STATE PARK AROUND 345 PM. FORECASTER: LA CORTE
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 320 PM EDT FRI AUG 3 2007 PAZ037-031930- TIOGA- 320 PM EDT FRI AUG 3 2007 ...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN TIOGA COUNTY... AT 317 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 11 MILES NORTH OF MANSFIELD...MOVING SOUTHEAST AT 10 MPH. THIS STORM WILL BE NEAR MILLERTON AROUND 325 PM AND ROSEVILLE AROUND 330 PM. FORECASTER: LA CORTE
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE STATE COLLEGE PA 333 PM EDT FRI AUG 3 2007 PAZ006-032015- POTTER- 333 PM EDT FRI AUG 3 2007 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL POTTER COUNTY... AT 329 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 24 MILES SOUTH OF WELLSVILLE...MOVING EAST AT 10 MPH. WIND GUSTS TO 40 MPH AND HAIL UP TO DIME SIZE ARE POSSIBLE WITH THIS STORM. THIS STORM WILL BE NEAR COUDERSPORT AROUND 345 PM AND DENTON HILL STATE PARK AROUND 415 PM. FORECASTER: LA CORTE
The Binghamton radar (KBGM), 89 km away, was scanning. The volume nearest the first event began at 19:47 UTC.
8 thunderstorm wind, 1 hail. Local standard time, as filed.
Tioga county 911 center reported trees down along Route 328 in Jackson Township.
Trained spotter reported trees down in Clinton Township on Route 405 between Muncy and Montgomery.
Lycoming county emergency manager reported trees and wires down in Muncy and Muncy Creek.
Adams county 911 center reported trees down in New Oxford.
Trained spotter reported trees and power lines down in Hanover.
York county Law enforcement reported roof damage and a large tree down in Hanover.
NWS employee measured a wind gust of 62 mph at the Clearfield elementary school.
Public reported trees down on Route 116 near Mcsherrystown.
Public reported nickel sized hail in Muncy.
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, August 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: 38318, 38319, 38320, 38321, 38322, 38323, 38324, 38325, 38317.