Isolated severe thunderstorms developed across western Pennsylvania in the late evening along a stationary front across the Ohio Valley.
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.
Isolated severe thunderstorms developed across western Pennsylvania in the late evening along a stationary front across the Ohio Valley.
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 May 11, 1:30 PM EST, 7 hours 35 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 230 PM EDT TUE MAY 11 2010 .SYNOPSIS... A SERIES OF DISTURBANCES AND A MEANDERING FRONTAL BOUNDARY WILL KEEP SHOWER AND THUNDERSTORM CHANCES IN THE FORECAST THROUGH MID WEEK. && .NEAR TERM /THROUGH WEDNESDAY/... MOISTURE SURGING OVER A WARM FRONT PUSHING TOWARD THE UPPER OHIO AREA SPAWNED SHOWERS...WITH SOME SNOW OVER AREAS NORTHEAST AND EAST OF PITTSBURGH TODAY. AS MID/UPPER SUPPORT HAS WANED WITH PASSAGE OF SHORT WAVE AXIS, ONLY SCATTERED SHOWER COVERAGE IS EXPECTED FOR TONIGHT...AREAS SOUTH OF INTERSTATE 76 MAY EXPERIENCE AN EVENING THUNDERSTORM AS THE SURFACE TROUGH/WARMER AIR DEVELOPS FURTHER NORTHWARD AND AND IMPROVES INSTABILITY. OVERNIGHT TEMPERATURES ARE FORECASTED TO BE QUITE VARIABLE ACROSS THE REGION...RANGING FROM APPROXIMATELY 40 NORTH TO NEAR 55 SOUTH...ALL IN RESPONSE TO EXPECTED POSITIONING OF THE SURFACE BOUNDARY. SHORTWAVE IS PROJECTED TO CROSS FLAT RIDGE OVER THE GREAT LAKES AND MID ATLANTIC REGION ON WEDNESDAY. WARM FRONT IS THUS EXPECTED TO MEANDER FURTHER NORTHWARD, AND THEN BE PULLED SOUTHWARD ONCE AGAIN BY EVENING. PROG THUS FEATURES SHOWER CHANCES ALL AREAS, WITH LIKELY NUMBERS SOUTH OF INTERSTATE 70 WHERE BETTER UPPER SUPPORT IS EXPECTED TO CROSS...ALL WITH THUNDERSTORM MENTION SOUTH OF THE TURNPIKE. FOR NOW, NONE OF THIS ACTIVITY LOOKS TO BE SEVERE ALTHOUGH SPC SLIGHT RISK IS DRAWN TO CLIP TUCKER COUNTY, WV. && .SHORT TERM /WEDNESDAY NIGHT THROUGH FRIDAY/... AFORE MENTIONED DISTURBANCE IS PROGGED EAST OF THE UPPER OHIO REGION ON WEDNESDAY NIGHT ALTHOUGH PASSAGE DOES NOT APPEAR DECISIVE ENOUGH TO ELIMINATE ALL PRECIPITATION CHANCES, ESPECIALLY IN LIGHT OF DEVELOPING LOW OVER THE MIDWEST WHICH WILL WARM TEMPERATURES AND IMPROVE THUNDERSTORM CHANCES FOR THURSDAY. THAT SYSTEMS COLD FRONT IS CURRENTLY PROJECTED FOR AN EARLY FRIDAY PASSAGE AND LIKELY PRECIP PROBABILITIES WERE INCLUDED FOR THAT EVENTUALITY. && .LONG TERM /FRIDAY NIGHT THROUGH TUESDAY/... AS THE COLD FRONT DEPARTS FRIDAY NIGHT...SOME LEFTOVER SHOWERS MAY BE LEFT ACROSS THE AREA...PRIMARILY TO THE SOUTH AND EAST. CONDITIONS WILL THEN DRY OUT FOR THE WEEKEND AS HIGH PRESSURE BUILDS ACROSS THE GREAT LAKES. LOW PRESSURE WILL THEN BUILD IN THE SOUTHERN PLAINS...WITH MODELS DIVERGING A BIT ON THEIR FORECASTS FOR EARLY NEXT WEEK. THE GFS AND CANADIAN MODELS BRING THE LOW RIGHT THROUGH THE REGION MONDAY INTO TUESDAY...WHILE THE UKMET AND EUROPEAN MODELS KEEP THE LOW CENTER TO THE SOUTH AND SLOWLY INCREASE POPS FROM SOUTH TO NORTH DURING THE TIME PERIOD. WILL STICK CLOSER TO THE HPC-PREFERRED EUROPEAN MODEL. THIS BRINGS A CHANCE OF SHOWERS INTO THE NORTHERN WV COUNTIES BY MONDAY MORNING...AND ACROSS THE REST OF THE FORECAST REGION BY TUESDAY MORNING. TEMPERATURES SHOULD BE SEASONABLE THROUGHOUT THE EXTENDED FORECAST. && .AVIATION /18Z TUESDAY THROUGH SUNDAY/... SCATTERED SHOWERS CONTINUE TO DEVELOP THIS AFTERNOON AFTER PASSAGE OF WIDESPREAD MORNING RAIN. EXPECT THAT THESE SHOWERS SHOULD DIMINISH DURING THE EVENING HOURS. CIGS WILL REMAIN MVFR/IFR THROUGH THE EVENING...WITH ALL SITES EXCEPT MGW EXPECTED TO DROP TO IFR CIGS OVERNIGHT. WITH A LOW LEVEL INVERSION DEVELOPING...THINK THAT THERE COULD BE SOME REDUCED VISIBILITIES IN THE MOIST BOUNDARY LAYER. AFTER SUNRISE...EXPECT THAT CIGS WILL RISE BACK TO MVFR. THE WEATHER WILL REMAIN UNSETTLED THROUGH THURSDAY AND FRIDAY...WITH RESTRICTIONS POSSIBLE AS WAVES OF LOW PRESSURE MOVE THROUGH THE REGION. HIGH PRESSURE WILL MOVE IN FRIDAY NIGHT...CLEARING OUT SKIES FOR SATURDAY AND SUNDAY. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. && 15/33
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PITTSBURGH PA 510 AM EDT TUE MAY 11 2010 MDZ001-OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>023- 029>032-WVZ001>004-012-021>023-041-120915- 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-WESTMORELAND-GREENE-FAYETTE-HANCOCK- BROOKE-OHIO-MARSHALL-WETZEL-MARION-MONONGALIA-PRESTON-TUCKER- 510 AM EDT TUE MAY 11 2010 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. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .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.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 942 PM EDT TUE MAY 11 2010 OHZ039-120215- TUSCARAWAS OH- 942 PM EDT TUE MAY 11 2010 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTY... TUSCARAWAS... AT 935 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 10 MILES NORTHWEST OF STRASBURG...MOVING SOUTHEAST AT 40 MPH. THESE STORMS WILL PRODUCE HEAVY DOWNPOURS AND HAIL. WIND GUSTS OF 40 MPH ARE POSSIBLE. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... SUGARCREEK... STRASBURG... BOLIVAR... DOVER... NEW PHILADELPHIA... MINERAL CITY... UHRICHSVILLE... DENNISON... KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS APPROACH. PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 952 PM EDT TUE MAY 11 2010 OHZ048-120215- COSHOCTON OH- 952 PM EDT TUE MAY 11 2010 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTY... COSHOCTON... AT 944 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 6 MILES NORTHWEST OF NEW GUILFORD...MOVING EAST AT 40 MPH. THESE STORMS WILL PRODUCE HEAVY DOWNPOURS AND HAIL. WIND GUSTS TO 40 MPH ARE POSSIBLE. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... NEW GUILFORD... NELLIE... WARSAW... BLISSFIELD... COSHOCTON... WEST LAFAYETTE... PLAINFIELD... BAKERSVILLE... KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS APPROACH. PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 1002 PM EDT TUE MAY 11 2010 OHZ041-PAZ013-020-120245- BEAVER PA-COLUMBIANA OH-LAWRENCE PA- 1002 PM EDT TUE MAY 11 2010 ...THUNDERSTORMS... THUNDERSTORMS TO MOVE THROUGH THE FOLLOWING COUNTIES... COLUMBIANA...BEAVER AND LAWRENCE... AT 953 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR IN PITTSBURGH INDICATED STRONG THUNDERSTORMS 6 MILES NORTH OF LEETONIA...MOVING EAST AT 40 MPH. THESE STORMS WILL PRODUCE HEAVY DOWNPOURS AND HAIL. WIND GUSTS TO 40 MPH ARE POSSIBLE. SOME LOCATIONS THAT WILL BE IMPACTED BY THESE STORMS INCLUDE... LEETONIA... COLUMBIANA... EAST PALESTINE... NEW CASTLE... ELLWOOD CITY... HARLANSBURG... FOMBELL... MCCONNELLS MILL... KEEP AN EYE TO THE SKY AND MOVE TO A SAFE PLACE IF THUNDERSTORMS APPROACH. PLEASE REPORT HAIL...STRONG WINDS OR WIND DAMAGE TO THE NATIONAL WEATHER SERVICE BY CALLING TOLL FREE...1-877-633-6772.
The Pittsburgh radar (KPBZ), 68 km away, was scanning. The volume nearest the first event began at 02:03 UTC.
2 thunderstorm wind. Local standard time, as filed.
A trained spotter reported trees and power lines down in New Wilmington.
Local media reported large trees down on Pacific Avenue in Brackenridge. The trees fell on utility poles, vehicle and homes, with a Jeep Cherokee being crushed by one tree.
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, May 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: 221771, 221773.