Scattered severe thunderstorms moved across eastern Ohio and western Pennsylvania in the early morning as a cold front crossed the region.
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 PBZ wrote it up.
Scattered severe thunderstorms moved across eastern Ohio and western Pennsylvania in the early morning as a cold front crossed the region.
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 Pittsburgh, PA wrote its last area forecast discussion before the first event at Aug 24, 11:53 PM EST, 1 hour 17 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 1253 AM EDT THU AUG 25 2011 .SYNOPSIS... A COLD FRONT WILL CROSS THE AREA TODAY ACCOMPANIED BY SHOWERS AND THUNDERSTORMS. HIGH PRESSURE WILL THEN BRING DRY AND SEASONABLE CONDITIONS FRIDAY INTO SATURDAY. && .NEAR TERM /THROUGH TODAY/... THUNDERSTORMS THAT FORMED OVER OHIO AND THE GREAT LAKES IN ADVANCE OF COLD FRONT ASSOCIATED WITH LOW PRESSURE CROSSING NORTH OF THE GREAT LAKES WILL CROSS THE UPPER OHIO REGION IN THE PREDAWN HOURS. SOME WEAKENING HAS OCCURRED AND SHOULD CONTINUE GIVEN THE STABILIZED BOUNDARY LAYER...BUT STRONG WIND FIELD REQUIRES CONTINUED VIGILANCE OF SEVERE POTENTIAL...THUS SEVERE THUNDERSTORM WATCH WAS ISSUED FOR THE NORTHERN TWO THIRDS OF THE PBZ CWA. BY DAYBREAK...THREAT WILL HAVE DIMINISHED BUT SHOWERS/STORMS WILL MOVE ACROSS THE UPPER OHIO VALLEY AS THE COLD FRONT AND UPPER TROF CONTINUE TO PROGRESS SOUTHEASTWARD. TEMPERATURES WERE FORECAST USING PERSISTENCE AND TWEAKED ND5 AND SREF GUIDANCE. && .SHORT TERM /TONIGHT THROUGH SATURDAY NIGHT/... SURFACE HIGH PRESSURE WILL BUILD UNDER NORTWEST TO WESTERLY FLOW ALOFT IN THE WAKE OF TODAYS FRONTAL PASSAGE. MEANWHILE...HURRICANE IRENE IS PROGGED TO CONTINUE NORTHWARD OFF THE EAST COAST WITH LITTLE AFFECT ON UPPER OHIO VALLEY WEATHER EXCEPT FOR BREEZY CONDITIONS AND THE SLIGHT CHANCE FOR SOME RAIN OVER THE RIDGE ZONES. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... SURFACE HIGH PRESSURE IS EXPECTED TO BUILD INTO THE UPPER OHIO VALLEY WITH DRIER, COOLER AIR SUNDAY NIGHT AND MONDAY. ANOTHER UPPER TROUGH IS FORECAST TO DROP SOUTHEAST ACROSS THE GREAT LAKES LATE MONDAY AND TUESDAY...WITH A WEAK SURFACE LOW TRACKING TO THE SOUTH OF THE OHIO VALLEY. THIS SYSTEM SHOULD BRING A SMALL CHANCE OF SHOWERS AND THUNDERSTORMS MAINLY TO THE SOUTHERN PART OF THE FORECAST AREA TUESDAY INTO WEDNESDAY. TEMPERATURES ARE FORECAST TO BE AROUND 5 DEGREES BELOW NORMAL MONDAY...MODERATING TO NEAR NORMAL FOR THE REMAINDER OF THE EXTENDED PERIOD. && .AVIATION /06Z THURSDAY THROUGH MONDAY/... EXPECT BAND OF PREFRONTAL MVFR SHOWERS AND SCATTERED THUNDERSTORMS TO MOVE SOUTHEASTWARD AT 35 KTS THROUGH THE UPPER OHIO VALLEY DURING THE PREDAWN HRS THIS MRNG. THUNDERSTORMS STILL HAVE SEVERE POTENTIAL PER WIND GUSTS. BRIEF IFR ALSO POSSIBLE. TIMING WAS BASED ON RECENT RADAR DATA AND HRRR MODEL SIMULATED RADAR OUTPUT. BY 12Z, EXPECT MAINLY MVFR SHOWERS ALTHOUGH ISOLATED THUNDERSTORMS WILL BE POSSIBLE UNTIL THE TIME OF COLD FRONTAL PASSAGE 16Z-19Z, AS DRYING BEGINS. OUTLOOK /THURSDAY NIGHT THROUGH MONDAY/... PATCHY MVFR FOG POSSIBLE EARLY FRIDAY...OTHERWISE VFR CONDITIONS SHOULD PREVAIL FRIDAY AND SATURDAY UNDER LOW AMPLITUDE RIDGING. LATEST MODEL RUNS/HURRICANE CENTER GUIDANCE INDICATE TRACK OF IRENE WILL HAVE LITTLE IF ANY IMPACT ON OHIO VALLEY TAF SITES SUNDAY. SURFACE HIGH SHOULD BRING VFR WEATHER FOR MONDAY. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PITTSBURGH PA 1244 AM EDT THU AUG 25 2011 OHZ039>041-048>050-PAZ007>009-013>015-020>022-029-073-WVZ001-002- 260445- TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-JEFFERSON OH-MERCER- VENANGO-FOREST-LAWRENCE-BUTLER-CLARION-BEAVER-ALLEGHENY-ARMSTRONG- WASHINGTON-WESTMORELAND-HANCOCK-BROOKE- 1244 AM EDT THU AUG 25 2011 ...SEVERE THUNDERSTORM WATCH 806 IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO...NORTHWEST PENNSYLVANIA...SOUTHWEST PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA AND NORTHERN PANHANDLE OF WEST VIRGINIA. .DAY ONE...TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SEVERE THUNDERSTORM WATCH. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. OHZ057>059-068-069-PAZ031-075-WVZ003-004-012-021-022-260445- MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-GREENE-FAYETTE-OHIO-MARSHALL- WETZEL-MARION-MONONGALIA- 1244 AM EDT THU AUG 25 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO...SOUTHWEST PENNSYLVANIA...NORTHERN WEST VIRGINIA AND NORTHERN PANHANDLE OF WEST VIRGINIA. .DAY ONE...TONIGHT. THERE IS A SLIGHT RISK OF SEVERE WEATHER OVERNIGHT. THE PRIMARY THREAT WILL BE DAMAGING WIND. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. PAZ016-023-074-260445- JEFFERSON PA-INDIANA-WESTMORELAND RIDGES- 1244 AM EDT THU AUG 25 2011 ...SEVERE THUNDERSTORM WATCH 806 IN EFFECT UNTIL 6 AM EDT EARLY THIS MORNING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHWEST PENNSYLVANIA AND WEST CENTRAL PENNSYLVANIA. .DAY ONE...TONIGHT. PLEASE LISTEN TO NOAA WEATHER RADIO OR GO TO WEATHER.GOV ON THE INTERNET FOR MORE INFORMATION ABOUT THE FOLLOWING HAZARDS. SEVERE THUNDERSTORM WATCH. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME. MDZ001-PAZ076-WVZ023-041-260445- GARRETT-FAYETTE RIDGES-PRESTON-TUCKER- 1244 AM EDT THU AUG 25 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...SOUTHWEST PENNSYLVANIA AND NORTHERN WEST VIRGINIA. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
206 AM EDT THU AUG 25 2011
OHZ039-048-057-058-068-250700-
COSHOCTON OH-GUERNSEY OH-MUSKINGUM OH-NOBLE OH-TUSCARAWAS OH-
206 AM EDT THU AUG 25 2011
...THUNDERSTORMS...
THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTIES...
COSHOCTON...GUERNSEY...MUSKINGUM...NOBLE AND TUSCARAWAS...
AT 200 AM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH
SHOWED STRONG THUNDERSTORMS 17 MILES WEST OF DILLON STATE
PARK...MOVING EAST AT 45 MPH. WIND GUSTS TO 40 MPH AND SMALL HAIL
ARE POSSIBLE WITH THE STORMS.
SOME LOCATIONS THAT WILL BE IMPACTED BY THESE THUNDERSTORMS
INCLUDE...
EAST FULTONHAM... DILLON STATE PARK... CANNELVILLE...
ZANESVILLE... DRAKE... PHILO...
DUNCAN FALLS... RURALDALE...
BLUE ROCK STATE PARK... BRIDGEVILLE...
ADAMSVILLE... CONESVILLE...
PLEASE REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE
BY CALLING TOLL FREE...1-877-633-6772.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 600 AM EDT
THURSDAY MORNING FOR PORTIONS OF EAST CENTRAL OHIO.
&&
LAT...LON 3996 8220 4013 8219 4035 8134 3964 8147
3966 8165 3975 8165 3976 8207 3981 8209
3982 8218 3990 8217 3991 8223 3995 8224The Pittsburgh radar (KPBZ), 68 km away, was scanning. The volume nearest the first event began at 06:08 UTC.
3 thunderstorm wind. Local standard time, as filed.
Law enforcement reported large trees down.
Law enforcement reported large trees down.
Law enforcement reported large trees down.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2011Every state in 2011This day in weather historyWarnings in Ohio, August 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: 334961, 334962, 334963.