Thunderstorms developed ahead of a cold front the afternoon of August 12th with scattered severe thunderstorms over eastern Ohio and western Pennsylvania. Minor road flooding also occurred across portions of Allegheny county in 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.
Thunderstorms developed ahead of a cold front the afternoon of August 12th with scattered severe thunderstorms over eastern Ohio and western Pennsylvania. Minor road flooding also occurred across portions of Allegheny county in 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 12, 10:01 AM EST, 3 hours 54 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 1101 AM EDT TUE AUG 12 2014 .SYNOPSIS... A COLD FRONT WILL SPAWN MORE SHOWERS AND THUNDERSTORMS TODAY. SEASONABLY COOL TEMPERATURES ARE EXPECTED FOR THE REMAINDER OF THE WEEK. && .NEAR TERM /THROUGH TONIGHT/... DRY SLOT AS INDICATED ON SATELLITE IS HELPING TO SCATTER OUT THE CLOUD DECK OVER MOST OF OHIO IN ADVANCE OF THE COLD FRONT THIS MORNING. THIS SHOULD HELP TO DESTABILIZE THE REGION...AS IS ALREADY THE CASE OVER CENTRAL OHIO PER THE LATEST MESOANALYSIS. IN ADDITION...A SHORTWAVE OUT AHEAD OF THE FRONT HAS ALREADY SPARKED SOME SHOWERS AND THUNDERSTORMS. EXPECT COVERAGE TO INCREASE THROUGH THE AFTERNOON...AS DEEP SHEAR INCREASES TO NEAR 35-40KTS ACROSS THE AREA. THIS SHOULD SUPPORT STRONG TO SEVERE STORMS...ESPECIALLY WHERE WE REMAIN CLOUD FREE LONGEST...PROVIDING FOR MORE INSTABILITY. THE STORM PREDICTION CENTER HAS FORECASTED A SLIGHT SEVERE RISK FOR TODAY...MENTION OF WHICH WILL BE MAINTAINED IN THE HAZARDOUS WEATHER OUTLOOK WITH A PRIMARY THREAT OF DAMAGING WIND GUSTS. TEMPERATURES WILL BE HIGHLY DEPENDENT ON THE AMOUNT OF SUN BREAKS THROUGH THE CLOUDS...BUT GENERALLY WENT WITH MID 70'S ACROSS THE ENTIRE AREA. BASED ON THE LATEST HI RES MODEL DATA....THE COLD FRONT AND MOST OF THE PRECIPITATION SHOULD BE EAST OF THE APPALACHIANS BY MIDNIGHT TONIGHT. && .SHORT TERM /WEDNESDAY THROUGH FRIDAY/... UPR TROF SHOULD MAINTAIN CLD COVER AND SHWR CHCS THROUGH WEDNESDAY WITH LOW CONVECTIVE THRESHOLDS IN COLD NORTHWEST FLOW. INCRSG SBSDNC AND DRY ADVCNT WL IMPROVE CONDITIONS THEREAFTER...ALTHOUGH LOW CONVECTIVE TEMPS SHOULD SPPRT STRATOCU PARTICULARLY ON THURSDAY. && .LONG TERM /FRIDAY NIGHT THROUGH MONDAY/... GENLY DRY WEA IS EXPD THRU THE LONG TERM AS SFC HIGH PRES BLDS ACRS THE GT LKS AND UPR OH VLY RGN AS AN UPR TROF EXITS THE E COAST. PREFERRED THE DRIER ECMWF AND ENSEMBLE SOLN OVER THE GFS. TEMPS SHOULD GRDLY WRM TO ABV SEASONAL LVLS BY LT IN THE PD. && .AVIATION /15Z TUESDAY THROUGH SATURDAY/... WDSPRD MVFR WITH OCNL IFR CONDS ARE EXPD AS GT LKS LOW PRES CONTS TO BRING SHWRS AND SC/ST TO THE RGN. A GRDL IMPROVEMENT IS EXPD LTR THIS MRNG...BEFORE THE LOW/S ASSOCIATED CDFNT ADVNS ACRS THE AREA THIS AFTN. TSTM CHCS WL INCR AHD OF THE CDFNT AND INCLUDED A VCTS MENTION IN THE TAFS UNTIL TIMING/COVG DETAILS BCM MORE CLEAR. OUTLOOK.../WEDNESDAY THROUGH SATURDAY/... A DISTURBANCE WL BRING PSBL RSTRNS INTO WED. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PITTSBURGH PA 327 AM EDT TUE AUG 12 2014 MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023- 029-031-073>076-WVZ001>004-012-021>023-041-130730- GARRETT-TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON- JEFFERSON OH-MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-MERCER-VENANGO- FOREST-LAWRENCE-BUTLER-CLARION-JEFFERSON PA-BEAVER-ALLEGHENY- ARMSTRONG-INDIANA-WASHINGTON-GREENE-WESTMORELAND-WESTMORELAND RIDGES- FAYETTE-FAYETTE RIDGES-HANCOCK-BROOKE-OHIO-MARSHALL-WETZEL-MARION- MONONGALIA-PRESTON-TUCKER- 327 AM EDT TUE AUG 12 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...EAST CENTRAL OHIO...NORTHWEST PENNSYLVANIA...SOUTHWEST PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA...NORTHERN WEST VIRGINIA AND NORTHERN PANHANDLE OF WEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY WITH THE PRIMARY HAZARD COMING FROM DAMAGING WIND GUSTS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. 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. 15
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
1211 PM EDT TUE AUG 12 2014
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0957 PM FLOOD 2 NNE PEARL 40.40N 81.71W
08/11/2014 COSHOCTON OH EMERGENCY MNGR
FLOODING REPORTED NEAR INTERSECTION OF COUNTY ROAD 43
AND STATE ROUTE 93.
&&
EVENT NUMBER PBZ1401790SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 1251 PM EDT TUE AUG 12 2014 OHZ039-048-057-058-121730- COSHOCTON OH-GUERNSEY OH-MUSKINGUM OH-TUSCARAWAS OH- 1251 PM EDT TUE AUG 12 2014 ...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN MUSKINGUM...SOUTH CENTRAL TUSCARAWAS...SOUTHEASTERN COSHOCTON AND WESTERN GUERNSEY COUNTIES... AT 1247 PM EDT...A STRONG THUNDERSTORM WAS LOCATED NEAR ADAMSVILLE... MOVING EAST AT 30 MPH. WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... NORWICH... FERNCLIFF... BRIDGEVILLE... ADAMSVILLE... OTSEGO... NEW CONCORD... BODEN... CAMBRIDGE... KIMBOLTON... BYESVILLE... SALT FORK STATE PARK... OLD WASHINGTON... PLEASE REPORT SIGNIFICANT WEATHER BY POSTING TO THE NWS PITTSBURGH FACEBOOK PAGE OR BY USING TWITTER @NWSPITTSBURGH. LAT...LON 4027 8147 3996 8140 3995 8191 4015 8195 34
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 128 PM EDT TUE AUG 12 2014 OHZ040-041-121800- CARROLL OH-COLUMBIANA OH- 128 PM EDT TUE AUG 12 2014 ...A STRONG THUNDERSTORM WILL AFFECT CENTRAL CARROLL AND WEST CENTRAL COLUMBIANA COUNTIES... AT 124 PM EDT...A STRONG THUNDERSTORM WAS LOCATED NEAR DELLROY... MOVING NORTHEAST AT 20 MPH. WIND GUSTS TO 50 MPH AND PENNY SIZE HAIL ARE POSSIBLE WITH THIS STORM. HEAVY RAIN WILL POND WATER ON ROADS AND QUICKLY FILL SMALL STREAMS. LOCATIONS IMPACTED INCLUDE... DELLROY... CARROLLTON... AUGUSTA... PLEASE REPORT SIGNIFICANT WEATHER BY POSTING TO THE NWS PITTSBURGH FACEBOOK PAGE OR BY USING TWITTER @NWSPITTSBURGH. LAT...LON 4074 8096 4050 8095 4045 8122 4060 8123 BOOKBINDER
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 133 PM EDT TUE AUG 12 2014 OHZ039-049-058-121800- GUERNSEY OH-HARRISON OH-TUSCARAWAS OH- 133 PM EDT TUE AUG 12 2014 ...STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN GUERNSEY...SOUTH CENTRAL TUSCARAWAS AND SOUTHWESTERN HARRISON COUNTIES... AT 128 PM EDT...STRONG THUNDERSTORMS WERE ALONG A LINE FROM BIRMINGHAM TO OLD WASHINGTON...MOVING EAST AT 25 MPH. WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS. HEAVY RAIN WILL POND WATER ON ROADS AND QUICKLY FILL SMALL STREAMS. LOCATIONS IMPACTED INCLUDE... SALT FORK STATE PARK... OLD WASHINGTON... BIRMINGHAM... LONDONDERRY... FREEPORT... PLEASE REPORT SIGNIFICANT WEATHER BY POSTING TO THE NWS PITTSBURGH FACEBOOK PAGE OR BY USING TWITTER @NWSPITTSBURGH. LAT...LON 4027 8123 3999 8124 3999 8155 4026 8148 BOOKBINDER
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 148 PM EDT TUE AUG 12 2014 OHZ040-041-049-050-121815- CARROLL OH-COLUMBIANA OH-HARRISON OH-JEFFERSON OH- 148 PM EDT TUE AUG 12 2014 ...STRONG THUNDERSTORMS WILL AFFECT EASTERN CARROLL...NORTH CENTRAL HARRISON...NORTHWESTERN JEFFERSON AND SOUTH CENTRAL COLUMBIANA COUNTIES IN EASTERN OHIO... AT 145 PM EDT...STRONG THUNDERSTORMS WERE ALONG A LINE FROM GUILFORD LAKE STATE PARK TO KILGORE...MOVING EAST AT 20 MPH. DOPPLER RADAR INDICATED THE STRONGEST STORM WAS JUST SOUTHWEST OF MECHANICSTOWN AT 145 PM. WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS AS THEY MOVE OFF TO THE EAST. HEAVY RAIN WILL POND WATER ON ROADS AND QUICKLY FILL SMALL STREAMS. LOCATIONS IMPACTED INCLUDE... MECHANICSTOWN... KILGORE... MILLPORT... BERGHOLZ... SALINEVILLE... HAMMONDSVILLE... STORM INTENSITY IS INCREASING...AND SEVERE WEATHER MAY DEVELOP RAPIDLY. REMAIN ALERT AND BE PREPARED TO TAKE ACTION IF WARNINGS ARE ISSUED. PLEASE REPORT SIGNIFICANT WEATHER BY POSTING TO THE NWS PITTSBURGH FACEBOOK PAGE OR BY USING TWITTER @NWSPITTSBURGH. LAT...LON 4080 8066 4049 8068 4039 8107 4068 8102 BOOKBINDER
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 215 PM EDT TUE AUG 12 2014 OHZ049-059-121845- BELMONT OH-HARRISON OH- 215 PM EDT TUE AUG 12 2014 ...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN BELMONT AND SOUTHERN HARRISON COUNTIES... AT 212 PM EDT...A STRONG THUNDERSTORM WAS LOCATED NEAR PIEDMONT...MOVING EAST AT 30 MPH. WIND GUSTS TO 40 MPH ARE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... PIEDMONT... FLUSHING... NEW ATHENS... CADIZ... PLEASE REPORT SIGNIFICANT WEATHER BY POSTING TO THE NWS PITTSBURGH FACEBOOK PAGE OR BY USING TWITTER @NWSPITTSBURGH. LAT...LON 4032 8088 4012 8089 4009 8120 4025 8122 BOOKBINDER
The Pittsburgh radar (KPBZ), 29 km away, was scanning. The volume nearest the first event began at 18:53 UTC.
21 thunderstorm wind, 1 flood. Local standard time, as filed.
The 911 Call Center reported trees down on Lisbon Road.
The 911 Call Center reported trees down on May Road in Chippewa.
The 911 Call Center reported trees down on Bradys Run Road.
The 911 Call Center reported trees down on Spring Run Road.
The 911 Call Center reported trees down around Cranberry Township.
A tree was reported down by the public at the intersection of MCintyre and Van Fleet.
The public reported a tree down blocking road at Mt. Pleasant and Beech Roads.
The 911 Call Center reported trees and wires down at Belleville and 6th Street.
A trained spotter reported a tree snapped on MT. Washington.
The 911 Call Center reported trees down in and around Middlesex.
Street flooding was reported across much of Pittsburgh and the North hills, with some vehicles stranded in high water.
The public reported large branches in the roadway.
The 911 Call Center reported trees and wires down.
The 911 Call Center reported trees down.
The 911 Call Center reported wind damage to basketball hoops and fences.
The 911 Call Center reported one tree and wires down.
The 911 Call Center reported a tree and wires down.
The 911 Call Center reported trees down in Rayne Township.
The 911 Call Center reported a tree down in Marion Center.
The 911 Call Center reported trees down around Clymer.
The 911 Call Center reported trees down in Pine Township.
The 911 Call Center reported a tree down.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Pennsylvania in 2014Every state in 2014This day in weather historyWarnings in Pennsylvania, August 2014
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: 533752, 533754, 533755, 533756, 533757, 533759, 533761, 533762, 533764, 533765, 533751, 533767, 533769, 533770, 533771, 533773, 533775, 533777, 533778, 533780, 533782, 533784.