An area of thunderstorms develped ahead of a cold front producing isolated damage in eastern Ohio and some flash flooding across parts of western 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 PBZ wrote it up.
An area of thunderstorms develped ahead of a cold front producing isolated damage in eastern Ohio and some flash flooding across parts of western 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 Pittsburgh, PA wrote its last area forecast discussion before the first event at Aug 14, 2:34 PM EST, 6 hours 11 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 334 PM EDT SAT AUG 14 2010 .SYNOPSIS... AN APPROACHING COLD FRONT WILL BRING INCREASING SHOWERS AND THUNDERSTORMS TONIGHT THROUGH SUNDAY. SLIGHTLY COOLER AND DRIER CONDITIONS WILL WORK INTO THE AREA FOR EARLY NEXT WEEK. && .NEAR TERM /THROUGH SUNDAY/... AREA OF STORMS ACROSS CENTRAL OHIO WILL MOVE TOWARD WESTERN CWA LATE AFTERNOON WELL AHEAD OF COLD FRONT STILL BACK ACROSS WESTERN GREAT LAKES. SHORTWAVE AHEAD OF CLOSED LOW ROTATING INTO NORTHERN LAKES WILL BRING ADDITIONAL DEVELOPMENT ACROSS REGION TONIGHT INTO SUNDAY. HEAVY DOWNPOURS AND GUSTY WINDS POSSIBLE WITH STORMS AND SEVERE POSSIBLE LATER TONIGHT AND SUNDAY AS HEIGHTS FALL AND UPPER TROUGH MOVES TOWARD REGION. QUITE HUMID CONDITIONS WILL CONTINUE. && .SHORT TERM /SUNDAY NIGHT THROUGH TUESDAY/... COLD FRONT WILL ENTER THE REGION SUNDAY AND PUSH INTO WEST VIRGINIA BY MONDAY. SHOWERS AND STORMS SUNDAY NIGHT WILL DIMINISH NORTHWEST TO SOUTHEAST MONDAY AS LESS HUMID AIR BUILDS IN BEHIND FRONT. FRONT WILL LAY OUT ACROSS WEST VIRGINIA TUESDAY AND KEPT A LOW CHANCE POP IN THE SOUTHEAST RIDGES. LOWER TEMPERATURES TOWARD NORMAL WITH MUCH LOWER DEW POINTS LATER MONDAY INTO TUESDAY. && .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/... BASED ON BLEND OF RECENT GEFS AND ECMWF MODEL OUTPUT...EXPECT THE UPPER LEVEL JETSTREAM FLOW TO BE ZONAL THIS PERIOD. THIS WILL MAINTAIN UNCERTAINTY IN THE PASSAGE OF A SECONDARY FRONT LATE WEEK. SO AFTER A DRY WEDNESDAY...INSERTED CHANCE OF SHOWERS AND THUNDERSTORMS THURSDAY INTO SATURDAY. FORECASTED TEMPERATURES NEAR SEASONABLE LEVELS AS INDICATED BY HPC GUIDANCE WHICH HAD SLIGHTLY LOWER DAYTIME HIGHS THAN GFS MOS. && .AVIATION /19Z SATURDAY THROUGH THURSDAY/... JUDGING FROM RECENT RADAR AND SURFACE DATA COUPLED WITH RECENT HRRR AND NAM-WRF MODEL OUTPUT...EXPECT BANDS OF SCATTERED IFR THUNDERSTORMS ACROSS CENTRAL OHIO WILL MOVE EASTWARD AT 25-30 KTS THROUGH THE UPPER OHIO VALLEY TONIGHT. THUNDERSTORM OUTFLOWS COULD CAUSE ADDITIONAL DEVELOPMENTS WHICH WOULD FURTHER COMPLICATE FORECAST OF THUNDERSTORMS AT TAF SITES. SO RATHER THAN FORECAST PROLONGED PERIOD OF THUNDERSTORMS...OPTED FOR MENTION OF CB EARLY TONIGHT AND MVFR FOG AND CB CEILINGS LATE TONIGHT WHEN PATCHY FOG CAN ALSO BE A RESTRICTION PLAYER. SURFACE WINDS TONIGHT WILL BE MAINLY FROM THE SOUTH 5-10 KTS WITH HIGHER GUSTS NEAR STORMS. ON SUNDAY, COLD FRONT CONTINUES EASTWARD PROGRESS AND WILL PRODUCE THE BEST CHANCE OF THUNDERSTORMS SUNDAY AFTERNOON AND NIGHT WITH IFR RESTRICTIONS...WITH SEVERE POTENTIAL. SEE SPC DISCUSSION. FRONT CROSSES REGION ON MONDAY WITH SOME LINGERING MVFR SHOWERS AND FOG AND POSSIBLY THUNDER EARLY. HIGH PRESSURE THEN BUILDS ACROSS FORECAST AREA LATE MONDAY THROUGH WEDNESDAY PROVIDING PREVALENT VFR. A SECONDARY FRONT MAY AFFECT THE UPPER OHIO VALLEY WITH MVFR SHOWERS THURSDAY. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PITTSBURGH PA 430 PM EDT SAT AUG 14 2010 OHZ039-048-057-058-151200- TUSCARAWAS-COSHOCTON-MUSKINGUM-GUERNSEY- 430 PM EDT SAT AUG 14 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO. .DAY ONE...TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON INTO THIS EVENING. THE MAIN THREAT WILL BE DAMAGING WINDS...ALTHOUGH LARGE HAIL IS ALSO A POSSIBILITY. IN ADDITION...HEAVY RAINFALL IS A POSSIBILITY THAT COULD CAUSE FLASH FLOODING. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS SUNDAY INTO SUNDAY NIGHT. THE MAIN THREAT WILL BE DAMAGING WINDS AND POSSIBLE LARGE HAIL. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. OHZ040-041-049-050-059-068-069-PAZ007>009-013>016-020>023-029>032- WVZ001>004-012-021-022-151200- CARROLL-COLUMBIANA-HARRISON-JEFFERSON OH-BELMONT-NOBLE-MONROE-MERCER- VENANGO-FOREST-LAWRENCE-BUTLER-CLARION-JEFFERSON PA-BEAVER-ALLEGHENY- ARMSTRONG-INDIANA-WASHINGTON-WESTMORELAND-GREENE-FAYETTE-HANCOCK- BROOKE-OHIO-MARSHALL-WETZEL-MARION-MONONGALIA- 430 PM EDT SAT AUG 14 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO...NORTHWEST PENNSYLVANIA...SOUTHWEST PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA...NORTHERN WEST VIRGINIA AND NORTHERN PANHANDLE OF WEST VIRGINIA. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS SUNDAY INTO SUNDAY NIGHT. THE MAIN THREAT WILL BE DAMAGING WINDS AND POSSIBLE LARGE HAIL. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MDZ001-WVZ023-041-151200- GARRETT-PRESTON-TUCKER- 430 PM EDT SAT AUG 14 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND AND NORTHERN WEST VIRGINIA. .DAY ONE...TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
426 PM EDT SAT AUG 14 2010
OHZ048-142115-
COSHOCTON OH-
426 PM EDT SAT AUG 14 2010
...STRONG THUNDERSTORMS...
THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTY...
COSHOCTON...
AT 420 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH
INDICATED A STRONG THUNDERSTORM 5 MILES WEST OF CONESVILLE...MOVING
NORTHEAST AT 10 MPH.
SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE...
COOPERDALE... CONESVILLE... COSHOCTON...
WEST LAFAYETTE...
THIS STORM IS CAPABLE OF PRODUCING HAIL UP TO THE SIZE OF PENNIES
AND WIND GUSTS UP TO 50 MPH. KEEP AN EYE TO THE SKY AND MOVE TO A
SAFE PLACE IF THUNDERSTORMS APPROACH. A LINE OF THUNDERSTORMS WILL
ALSO BE ENTERING THE COUNTY FROM THE WEST...PRODUCING HEAVY RAINFALL
AND GUSTY WINDS.
PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
LAT...LON 4018 8213 4045 8188 4045 8185 4030 8162
4015 8183 4015 8209SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
538 PM EDT SAT AUG 14 2010
OHZ039>041-048-049-057-058-142215-
CARROLL OH-COLUMBIANA OH-COSHOCTON OH-GUERNSEY OH-HARRISON
OH-MUSKINGUM OH-TUSCARAWAS OH-
538 PM EDT SAT AUG 14 2010
...THUNDERSTORMS WITH GUSTY WIND AND HEAVY RAIN...
THUNDERSTORMS WITH GUSTY WIND AND HEAVY RAIN TO MOVE THROUGH THE
FOLLOWING COUNTIES...
COLUMBIANA...MUSKINGUM...GUERNSEY...HARRISON...COSHOCTON...TUSCARAWAS
AND CARROLL...
AT 532 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH
SHOWED THUNDERSTORMS WITH GUSTY WIND AND HEAVY RAIN ALONG A LINE
EXTENDING FROM 6 MILES NORTHWEST OF BOLIVAR TO 4 MILES SOUTHEAST OF
NEWCOMERSTOWN TO BODEN...MOVING EAST AT 30 MPH.
THESE THUNDERSTORMS CAN PRODUCE WIND GUSTS OF OVER 40 MPH...ALSO
HEAVY RAIN THAT MAY CAUSE PONDED WATER ON ROADS AND IN LOW LYING
AREAS. VISIBILITY CAN BE REDUCED.
SOME LOCATIONS THAT WILL BE IMPACTED BY THESE THUNDERSTORMS
INCLUDE...
STRASBURG... STONE CREEK... OTSEGO...
NEWCOMERSTOWN... BODEN... BAKERSVILLE...
KIMBOLTON... DOVER... BOLIVAR...
NEW PHILADELPHIA... GILMORE... GNADENHUTTEN...
KEEP AN EYE ON THE SKY AND MOVE INDOORS WHEN THUNDERSTORMS STRIKE.
NEVER DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
PLEASE REPORT HIGH WINDS HEAVY RAIN AND FLOODING PROBLEMS TO
THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
LAT...LON 4023 8166 4064 8163 4067 8146 4065 8142
4065 8124 4072 8123 4073 8109 4077 8109
4077 8107 4046 8108 4016 8120 4016 8122
4002 8123 4008 8186SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 606 PM EDT SAT AUG 14 2010 PAZ013-014-020-142300- BEAVER PA-BUTLER PA-LAWRENCE PA- 606 PM EDT SAT AUG 14 2010 ...THUNDERSTORM WITH HEAVY RAIN MOVING FROM LAWRENCE COUNTY AND INTO BUTLER COUNTY... AT 601 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 4 MILES SOUTHWEST OF MORAINE STATE PARK...MOVING EAST AT 10 MPH. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... MCCONNELLS MILL... FOMBELL... ELLWOOD CITY... MORAINE STATE PARK... ZELIENOPLE... EVANS CITY... SAXONBURG... CHICORA... BUTLER... PRECAUTIONARY/PREPAREDNESS ACTIONS... HEAVY RAINS MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. WATER LEVELS OF SMALL STREAMS AND CREEKS MAY ALSO RISE...THEREFORE SEEK HIGHER GROUND IF THREATENED BY FLOOD WATERS. && LAT...LON 4097 7971 4068 7979 4084 8033 4102 8032
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PITTSBURGH PA
629 PM EDT SAT AUG 14 2010
OHZ049-050-059-069-WVZ001>004-012-142330-
BELMONT OH-BROOKE WV-HANCOCK WV-HARRISON OH-JEFFERSON OH-MARSHALL
WV-MONROE OH-OHIO WV-WETZEL WV-
629 PM EDT SAT AUG 14 2010
...THUNDERSTORMS WITH HEAVY RAIN...
SHOWERS WITH HEAVY RAIN TO MOVE THROUGH THE FOLLOWING COUNTIES...
MONROE...BELMONT...HARRISON...JEFFERSON...WETZEL...MARSHALL...OHIO...
BROOKE AND HANCOCK...
AT 626 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH
SHOWED SHOWERS WITH HEAVY RAIN ALONG A LINE EXTENDING FROM 2 MILES
SOUTHEAST OF BOWERSTON TO 15 MILES SOUTH OF FLY...MOVING EAST AT 25
MPH.
THESE SHOWERS CAN PRODUCE HEAVY RAIN THAT MAY CAUSE PONDED WATER ON
ROADS AND IN LOW LYING AREAS. VISIBILITY CAN BE REDUCED. IN
ADDITION...WIND GUSTS UP TO 40 MPH AND PEA SIZED HAIL ARE ALSO
POSSIBLE WITH THESE STORMS.
SOME LOCATIONS THAT WILL BE IMPACTED BY THESE SHOWERS INCLUDE...
WOODSFIELD... TAPPAN... SOMERTON...
PIEDMONT... LEWISVILLE... GRAYSVILLE...
CLENDENING... BOWERSTON... BARNESVILLE...
ANTIOCH... BETHESDA... MORRISTOWN...
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.
PLEASE REPORT HEAVY RAIN AND FLOODING PROBLEMS TO THE NATIONAL
WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
LAT...LON 3947 8072 3956 8084 3959 8085 3957 8090
3960 8094 3955 8102 3956 8105 3958 8122
4016 8122 4016 8125 4043 8126 4042 8095
4053 8092 4057 8054 3973 8052 3972 8051
3947 8050 3943 8052 3943 8056SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 704 PM EDT SAT AUG 14 2010 PAZ014-021-022-030-150100- ALLEGHENY PA-ARMSTRONG PA-BUTLER PA-WESTMORELAND PA- 704 PM EDT SAT AUG 14 2010 ...HEAVY RAIN... SHOWERS WITH HEAVY RAIN TO MOVE THROUGH THE FOLLOWING COUNTIES... ARMSTRONG...ALLEGHENY...WESTMORELAND AND BUTLER... AT 701 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH SHOWED SHOWERS WITH HEAVY RAIN 5 MILES EAST OF EVANS CITY...MOVING SOUTHEAST AT 15 MPH. THESE SHOWERS CAN PRODUCE HEAVY RAIN THAT MAY CAUSE PONDED WATER ON ROADS AND IN LOW LYING AREAS. BETWEEN 1 AND 2 INCHES OF RAIN COULD FALL THROUGH 9 PM. VISIBILITY CAN BE REDUCED. AN ISOLATED LIGHTNING STRIKE IS ALSO POSSIBLE. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE SHOWERS INCLUDE... EVANS CITY... BUTLER... MARS... GIBSONIA... SAXONBURG... LERNERVILLE... SARVER... RUSSELLTON... FOX CHAPEL... FREEPORT... NATRONA HEIGHTS... PENN HILLS... DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. MOVE TO HIGHER GROUND. PLEASE REPORT HEAVY RAIN AND FLOODING PROBLEMS TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772. LAT...LON 4066 7934 4027 7976 4076 8012 4091 7999
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 724 PM EDT SAT AUG 14 2010 OHZ041-050-PAZ014-020-021-029-WVZ001-002-150045- COLUMBIANA-JEFFERSON OH-BUTLER-BEAVER-ALLEGHENY-WASHINGTON- HANCOCK-BROOKE- INCLUDING THE CITIES OF...EAST LIVERPOOL...SALEM...COLUMBIANA... EAST PALESTINE...WELLSVILLE...CALCUTTA...STEUBENVILLE...BUTLER... ZELIENOPLE...ALIQUIPPA...BEAVER FALLS...AMBRIDGE...MONACA... BEAVER...PITTSBURGH METRO AREA...WASHINGTON...CANONSBURG... DONORA...CALIFORNIA...CHARLEROI...MONONGAHELA...MCMURRAY... TORONTO...WEIRTON 724 PM EDT SAT AUG 14 2010 ...THUNDERSTORMS WITH GUSTY WINDS... TWO SEPARATE LINES OF THUNDERSTORMS ACROSS EASTERN OHIO WILL MOVE ACROSS THE NORTHERN WEST VIRGINIA PANHANDLE INTO WESTERN PENNSYLVANIA THROUGH 9 PM. THESE THUNDERSTORMS COULD PRODUCE GUSTY WINDS UP TO 50 MPH. RAINFALL UP TO 1 INCH PER HOUR IS ALSO POSSIBLE WITH THESE THUNDERSTORMS. BE CAREFUL OF STRONG WIND GUSTS AND PONDED WATER ON ROADWAYS IF DRIVING.
The Pittsburgh radar (KPBZ), 17 km away, was scanning. The volume nearest the first event began at 01:44 UTC.
4 flash flood. Local standard time, as filed.
The public reported a creek flooding a parking lot and a basement along Babcock BLVD.
A trained spotter reported flash flooding with State Route 228 blocked by flowing water in spots.
Emergency management reported numerous roads closed due to flash flooding and debris washed onto roads across Jackson and Lancaster Townships.
Emergency management reported numerous roads closed across Penn Township due to flash flooding and debris washed onto roads.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2010Every state in 2010This day in weather historyWarnings in Pennsylvania, August 2010
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: 257826, 258006, 258010, 258012.