A line of thunderstorms developed over Lake Erie and moved southeast across northwestern Pennsylvania.
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 CLE wrote it up.
A line of thunderstorms developed over Lake Erie and moved southeast across northwestern Pennsylvania.
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 Cleveland, OH wrote its last area forecast discussion before the first event at Jul 25, 9:07 AM EST, 1 hour 28 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CLEVELAND OH 1007 AM EDT MON JUL 25 2011 .SYNOPSIS... A COLD FRONT WILL MOVE SOUTHEAST ACROSS THE REGION TODAY. HIGH PRESSURE WILL BUILD IN BEHIND THE FRONT BRINGING LOWER HUMIDITY LEVELS AND TEMPERATURES CLOSER TO NORMAL FOR TONIGHT AND TUESDAY. THE HIGH PRESSURE WILL MOVE EAST OF THE REGION THROUGH MIDWEEK...AND SOUTHERLY WINDS WILL BRING ANOTHER ROUND OF HOT AND HUMID CONDITIONS FOR THE END OF THE WEEK. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... COLD FRONT IS CURRENTLY LOCATED ACROSS LAKE ERIE WITH UNSTABLE AIR LOCATED ALONG AND SOUTH OF THE FEATURE. WITH SCATTERED CLOUDS SOME HEATING WILL CONTINUE. MIXED LAYER CAPE HAS INCREASED TO OVER 1000 J/KG ESPECIALLY TOWARD NW PA. WILL CONTINUE THE CHANCE OF SHOWERS AND THUNDERSTORMS OVER THE EASTERN AND CENTRAL COUNTIES. WIND SHEAR IS WEAK SO ANY STORM ORGANIZATION WILL BE MINIMAL. HAVE RAISED MAX TEMPERATURES A COUPLE OF DEGREES IN MOST LOCATIONS TO THE MID TO UPPER 80S. && .SHORT TERM /6 PM THIS EVENING THROUGH THURSDAY NIGHT/... HIGH PRESSURE BUILDING IN TONIGHT ALLOWING FOR TEMPS AND DEWPOINTS TO BE A BIT LOWER COMPARED TO THE PAST SEVERAL DAYS. FOR NW PA AND FAR NE OH THERE MAY BE SOME CLOUDS ON TUESDAY AS AN UPPER TROUGH SWINGS ACROSS WRN NY AND OVER EASTERN LAKE ERIE. THIS TROUGH WILL BRING MAINLY SOME ADDITIONAL CLOUDS TO THE AREA AND INTO NE OH...HOWEVER THE REMAINDER OF THE AREA WILL SEE PARTLY TO MOSTLY SUNNY SKIES ESPECIALLY ACROSS THE WEST. THERE IS THE POSSIBILITY OF A SHOWER OR SPRINKLE ACROSS INTERIOR NW PA SO DO HAVE SLGT CHC POPS. ONCE THE UPPER TROUGH DEPARTS HIGH PRESSURE WILL ONCE AGAIN BECOME DOMINATE OVER THE ENTIRE FORECAST AREA. THIS HIGH PRESSURE WILL MOVE EAST OF THE AREA THROUGH WEDNESDAY AS WARM AIR ADVECTION BEGINS. SOUTHERLY FLOW AND THE UPPER RIDGE WILL BUILD OVER THE AREA ON THURSDAY ALLOWING FOR TEMPS OF AT LEAST 90 TO BUILD BACK INTO THE AREA WITH INCREASED HUMIDITY. && .LONG TERM /FRIDAY THROUGH SUNDAY/... OLD FRONT WILL BE APPROACHING ON FRIDAY WITH INCREASING CHANCES OF THUNDERSTORMS. IT WILL BE HOT AGAIN ON FRIDAY UNTIL THE THUNDERSTORMS DEVELOP AND SLIDE ACROSS MUCH OF THE REGION FRIDAY NIGHT INTO EARLY SATURDAY. HUMIDITY VALUES SHOULD ONCE AGAIN INCREASE AHEAD OF THE FRONT WITH THE POSSIBILITY OF A HEAT HEADLINE. THERE IS SOME UNCERTAINTY AS TO HOW FAR SOUTH THE FRONT WILL PUSH BY SATURDAY AFTERNOON. SO WILL KEEP CHANCES FOR THE SOUTHERN PORTIONS OF THE AREA. IT WILL BE DRIER ON SUNDAY WITH SLIGHTLY COOLER CONDITIONS EXPECTED. TEMPERATURES ON SUNDAY SHOULD BE NEAR TO SLIGHTLY ABOVE SEASONAL AVERAGES. && .AVIATION /14Z MONDAY THROUGH FRIDAY/... A WEAK COLD FRONT WILL APPROACH THE REGION EARLY THIS MORNING AND WILL SWEEP ACROSS THE REGION THROUGH EARLY AFTERNOON. IT APPEARS THERE IS A WINDOW JUST AHEAD OF AND IN THE WAKE OF THE FRONT FOR SOME MVFR CEILINGS AND VISIBILITIES. THESE LOWER CEILINGS WILL LIKELY BE ACCOMPANIED BY THUNDERSTORMS. IF SOME STRONGER THUNDERSTORMS DO MATERIALIZE THERE COULD BE SOME BRIEF IFR. THE THUNDER SHOULD NOT LAST MORE THAN A COUPLE HOURS. MVFR CEILINGS WILL GRADUALLY LIFT IN THE WAKE OF THE FRONT AS SOME DRIER AIR IS ADVECTED IN ON NORTHWESTERLY WINDS. THERE MAY BE SOME MVFR CEILINGS THAT LINGER ACROSS INLAND NE OHIO AND INLAND PA INTO THE AFTERNOON. VFR CONDITIONS SHOULD MOVE INTO THE AREA FROM WEST TO EAST THROUGH MIDDLE AND LATE AFTERNOON. OUTLOOK...NON VFR CEILINGS MAY OCCUR WEDNESDAY NIGHT THROUGH FRIDAY. && .MARINE... COLD FRONT WAS LOCATED FROM CENTRAL LAKE HURON TO NEAR CHICAGO AT 07Z. THIS BOUNDARY WILL MOVE ACROSS LAKE ERIE BY LATE MORNING WITH A FEW SHOWERS AND THUNDERSTORMS ALONG AND AHEAD OF IT. WINDS WILL SHIFT TO THE NORTHWEST IN THE WAKE OF THE FRONT AS HIGH PRESSURE BUILDS ACROSS THE CENTRAL LAKES. WINDS WILL BECOME A BIT MORE WESTERLY BY EVENING WITH A BRIEF WINDOW OF STRONGER WINDS DURING THE EVENING HOURS. WAVES SHOULD REMAIN JUST UNDER SMALL CRAFT ADVISORY LEVELS BUT IT DOES APPEAR THAT IT WILL BECOME CHOPPY ON THE EASTERN PORTION OF THE LAKE. ADDITIONAL JET ENERGY WILL BE MOVING THROUGH THE MIDDLE LEVEL NORTHWESTERLY FLOW ON TUESDAY. THIS MAY HELP TO DEEPEN LOW PRESSURE OVER QUEBEC. WINDS SHOULD REMAIN WESTERLY AND COULD END UP CREATING WAVES THAT ARE VERY CLOSE TO SMALL CRAFT CRITERIA. SOMETHING FOR LATER SHIFTS TO WATCH. WINDS WILL GRADUALLY SHIFT AROUND TO THE SOUTH BY LATE WEDNESDAY EVENING. BY THURSDAY A SOUTHWESTERLY WIND WILL BEGIN TO INCREASE AS THE NEXT COLD FRONT APPROACHES. THIS FRONT LOOKS TO MOVE ACROSS THE LAKE FRIDAY EVENING INTO SATURDAY MORNING. && .CLE WATCHES/WARNINGS/ADVISORIES... OH...NONE. PA...NONE. MARINE...NONE. && SYNOPSIS...ABE NEAR TERM...REL SHORT TERM...ABE LONG TERM...MULLEN AVIATION...MULLEN MARINE...MULLEN
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE CLEVELAND OH 943 AM EDT MON JUL 25 2011 OHZ012-089-PAZ001-261345- LAKE-ASHTABULA LAKESHORE-NORTHERN ERIE- 943 AM EDT MON JUL 25 2011 ...MODERATE RISK OF RIP CURRENTS UNTIL 8 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST OHIO AND NORTHWEST PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. MODERATE RISK OF RIP CURRENTS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. HOT AND HUMID WEATHER AND HIGH HEAT INDEX VALUES ARE LIKELY AGAIN THURSDAY AND FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. OHZ003-006>011-013-014-017>023-027>033-036>038-047-PAZ002-003-261345- LUCAS-WOOD-OTTAWA-SANDUSKY-ERIE OH-LORAIN-CUYAHOGA-GEAUGA- ASHTABULA INLAND-HANCOCK-SENECA-HURON-MEDINA-SUMMIT-PORTAGE-TRUMBULL- WYANDOT-CRAWFORD-RICHLAND-ASHLAND-WAYNE-STARK-MAHONING-MARION-MORROW- HOLMES-KNOX-SOUTHERN ERIE-CRAWFORD PA- 943 AM EDT MON JUL 25 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL OHIO...NORTHEAST OHIO...NORTHWEST OHIO AND NORTHWEST PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. HOT AND HUMID WEATHER AND HIGH HEAT INDEX VALUES ARE LIKELY AGAIN THURSDAY AND FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. LEZ061-142>149-162>169-261345- LAKE ERIE OPEN WATERS FROM RIPLEY TO BUFFALO NY- MAUMEE BAY TO RENO BEACH OH-RENO BEACH TO THE ISLANDS OH- THE ISLANDS TO VERMILION OH-VERMILION TO AVON POINT OH- AVON POINT TO WILLOWICK OH-WILLOWICK TO GENEVA-ON-THE LAKE OH-GENEVA- ON-THE-LAKE TO CONNEAUT OH-CONNEAUT OH TO RIPLEY NY- LAKE ERIE OPEN WATERS FROM MAUMEE BAY TO RENO BEACH- LAKE ERIE OPEN WATERS FROM RENO BEACH TO THE ISLANDS- LAKE ERIE OPEN WATERS FROM THE ISLANDS TO VERMILION- LAKE ERIE OPEN WATERS FROM VERMILION TO AVON POINT- LAKE ERIE OPEN WATERS FROM AVON POINT TO WILLOWICK- LAKE ERIE OPEN WATERS FROM WILLOWICK TO GENEVA-ON-THE-LAKE- LAKE ERIE OPEN WATERS FROM GENEVA-ON-THE-LAKE TO CONNEAUT- LAKE ERIE OPEN WATERS FROM CONNEAUT OH TO RIPLEY NY- 943 AM EDT MON JUL 25 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR LAKE ERIE. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. OUDEMAN
The Buffalo radar (KBUF), 144 km away, was scanning. The volume nearest the first event began at 15:33 UTC.
1 funnel cloud, 1 hail. Local standard time, as filed.
Trained spotters reported seeing several funnel clouds over and near the City of Erie. No damage was reported.
Penny to nickel sized hail was reported.
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: 336885, 336901.