A nearly stationary frontal boundary across the upper Ohio valley was the focus for severe thunderstorms and some flooding across eastern Ohio, western Pennsylvania, and northern West Virginia.
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.
A nearly stationary frontal boundary across the upper Ohio valley was the focus for severe thunderstorms and some flooding across eastern Ohio, western Pennsylvania, and northern West Virginia.
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 Jun 4, 12:29 PM EST, 2 hours 1 minute earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 129 PM EDT FRI JUN 4 2010 .SYNOPSIS... UNSETTLED WEATHER IS EXPECTED TO PERSIST THROUGH THE WEEKEND. && .NEAR TERM /THROUGH TONIGHT/... WITH MODERATE INSTABILITY INCREASING AND 0-6KM SHEAR OF 35-45 KTS FORECAST ALONG A BOUNDARY EXTENDING ACROSS NORTHERN OHIO AND JUST NORTH OF THE PITTSBURGH METRO...THE THREAT FOR SEVERE WEATHER THIS AFTERNOON HAS INCREASED. THUS...A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR EASTERN OHIO AND EVERYWHERE NORTH OF THE MASON- DIXON LINE. THUNDERSTORMS DEVELOPING ACROSS CENTRAL OHIO LIKELY TO EXPAND ALONG THE BOUNDARY THIS AFTERNOON AND CONTINUE INTO THIS EVENING. ASIDE FROM THE THREAT OF LARGE HAIL AND DAMAGING WINDS...FLASH FLOODING IS ALSO CONCERN IF STORMS TRAIN IN LOCATIONS MUCH OF THE AREA WHICH HAS SEEN SEVERAL INCHES OF RAINFALL OVER THE PAST FEW DAYS. && .SHORT TERM /SATURDAY THROUGH SUNDAY/... COOL FRONT WILL PASS EAST OF THE CWA EARLY SATURDAY...WITH SEVERE POTENTIAL LINGERING WITH IT INTO SATURDAY. ANOTHER SHOT FOR STRONG TO SEVERE STORMS WILL COME SATURDAY NIGHT INTO EARLY SUNDAY...AS THE MODELS HINT AT A MCS DEVELOPING JUST WEST OF THE CWA ON A WARM FRONT...THEN MOVING EAST ACROSS THE REGION OVERNIGHT INTO SUNDAY MORNING. AS FOR SATURDAY AFTERNOON...DIURNAL INSTABILITY WILL KEEP CHANCE OF STORMS GOING. NEAR SEASONAL TEMPS WILL BE EXPECTED THROUGH THIS PERIOD...ALTHOUGH SUNDAY MAY BE A FEW DEGREES BELOW NORMAL. && .LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/... THE UNSETTLED WEATHER PATTERN SHOULD BE NEARING ITS END SUNDAY NIGHT WITH MODEL AGREEMENT THAT A BROAD TROUGH WILL EXTEND FROM NEW ENGLAND INTO INTO THE GREAT LAKES. BEHIND A FRONTAL BOUNDARY DIVING SOUTH OF THE AREA ON SUNDAY...A COOLER AIR MASS SHOULD WORK ITS WAY IN...WITH SHOWERS POSSIBLE INTO MONDAY AS THE TROUGH ADVECTS EAST OF THE REGION. THERE IS MODEL AGREEMENT BETWEEN THE GFS AND ECMWF THAT HIGH PRESSURE WILL BUILD INTO THE AREA FROM THE NORTHWEST ON TUESDAY...WITH A DEEP LAYER OF DRY AIR ADVECTING INTO THE AREA. THE MID-LEVEL FLOW WILL BECOME MORE ZONAL WITH DEEP LAYER MOISTURE RETURNING TO THE AREA ON WEDNESDAY. THIS WILL ALLOW FOR A MORE DISTURBED PATTERN TO RETURN WITH A LOW PROGGED TO CROSS THE MISSOURI AND OHIO VALLEYS. WITH THIS PATTERN RETURNING...THERE IS THE CHANCE OF SHOWERS AND THUNDERSTORMS WEDNESDAY AFTERNOON. AS THE TROUGH MOVES EAST OF THE AREA ON MONDAY...A COOLER MID-LEVEL NORTHWESTERLY FLOW WILL ALLOW FOR TEMPERATURES AROUND 5 DEGREES BELOW NORMAL. AS THE LOW APPROACHES FROM THE WEST...MORE OF A SOUTHERLY COMPONENT TO THE FLOW WITH WAA WILL ALLOW FOR TEMPERATURES TO RETURN TO NORMAL SEASONAL VALUES TUESDAY AND WEDNESDAY. && .AVIATION /17Z FRIDAY THROUGH TUESDAY/... FOG AND AREAS OF LOW CLOUDS WILL PRODUCE MVFR/AREAS OF IFR THROUGH 13-14Z. BY LATE MORNING...VFR CUMULUS WILL BEGIN TO FORM...INCREASING THIS AFTN. SCATTERED SHWRS/TSTMS WILL DEVELOP ONCE AGAIN BY LATE AFTN...WITH MVFR CONDITIONS IN THE STRONGER ACTIVITY...WITH GUSTY TSTM WINDS AND SMALL HAIL POSSIBLE. LIGHT SURFACE WINDS THIS MORNING WILL BECOME SOUTHWEST 6-10 KT THIS AFTN. AFTER PERHAPS A BRIEF BREAK FROM SHWR/TSTM ACTIVITY LATE EVENING INTO THE OVERNIGHT...LOW PRESSURE WILL APPROACH FROM THE WEST...WITH SCATTERED SHWRS/TSTMS ENTERING EASTERN OH BY 10-12Z SAT...AND ACROSS WESTERN PA PORTS SATURDAY MORNING. LOW PRESSURE WILL CROSS THE AREA OVER THE WEEKEND...WITH A WARM MOIST AIR MASS ALLOWING FOR THE CHANCE OF SHOWERS AND THUNDERSTORMS WITH POSSIBLE RESTRICTIONS INTO NEXT MONDAY. HIGH PRESSURE WILL RETURN ON TUESDAY FOR VFR CONDITIONS. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PITTSBURGH PA 311 PM EDT FRI JUN 4 2010 OHZ039>041-048>050-057>059-PAZ007>009-013>016-020>023-029>032- WVZ001>004-051915- TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-JEFFERSON OH- MUSKINGUM-GUERNSEY-BELMONT-MERCER-VENANGO-FOREST-LAWRENCE-BUTLER- CLARION-JEFFERSON PA-BEAVER-ALLEGHENY-ARMSTRONG-INDIANA-WASHINGTON- WESTMORELAND-GREENE-FAYETTE-HANCOCK-BROOKE-OHIO-MARSHALL- 311 PM EDT FRI JUN 4 2010 ...SEVERE THUNDERSTORM WATCH 254 IN EFFECT UNTIL 8 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO...NORTHWEST PENNSYLVANIA...SOUTHWEST PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA AND NORTHERN PANHANDLE OF WEST VIRGINIA. .DAY ONE...THIS AFTERNOON AND 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. THERE IS ALSO A CHANCE OF SEVERE THUNDERSTORMS TONIGHT. THE PRIMARY THREAT WILL BE DAMANGING WINDS...WITH LARGE HAIL AND FLASH FLOODING POSSIBLE. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THERE IS A SLIGHT CHANCE FOR SEVERE WEATHER EARLY SATURDAY...AND AGAIN SATURDAY NIGHT INTO SUNDAY. THE MAIN HAZARDS WILL BE DAMAGING WINDS AND LARGE HAIL. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MDZ001-OHZ068-069-WVZ012-021>023-041-051915- GARRETT-NOBLE-MONROE-WETZEL-MARION-MONONGALIA-PRESTON-TUCKER- 311 PM EDT FRI JUN 4 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...EAST CENTRAL OHIO AND NORTHERN WEST VIRGINIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. THERE IS A CHANCE OF SEVERE THUNDERSTORMS THIS AFTERNOON AND TONIGHT. THE MAIN HAZARDS WILL BE DAMAGING WINDS AND LARGE HAIL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THERE IS A SLIGHT CHANCE FOR SEVERE WEATHER SATURDAY INTO SUNDAY. THE MAIN HAZARDS WILL BE DAMAGING WINDS AND LARGE HAIL. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
159 PM EDT FRI JUN 04 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0117 PM HAIL 2 SW BLISSFIELD 40.38N 81.99W
06/04/2010 M1.00 INCH COSHOCTON OH PUBLIC
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
204 PM EDT FRI JUN 04 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0149 PM HAIL 1 S CHILI 40.36N 81.77W
06/04/2010 U1.00 INCH COSHOCTON OH PUBLIC
HAIL WAS REPORTED BY THE PUBLIC.
&&
JDARNLEYPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
243 PM EDT FRI JUN 04 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0212 PM HAIL STONE CREEK 40.40N 81.56W
06/04/2010 E1.00 INCH TUSCARAWAS OH PUBLIC
&&
JDARNLEYPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
247 PM EDT FRI JUN 04 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0236 PM HAIL DENNISON 40.40N 81.33W
06/04/2010 E1.00 INCH TUSCARAWAS OH PUBLIC
&&
JDARNLEYPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
259 PM EDT FRI JUN 04 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0249 PM HAIL 5 N DEERSVILLE 40.38N 81.19W
06/04/2010 M0.88 INCH HARRISON OH TRAINED SPOTTER
&&
JDARNLEYPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH PA
304 PM EDT FRI JUN 04 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0254 PM HAIL UHRICHSVILLE 40.40N 81.35W
06/04/2010 E1.25 INCH TUSCARAWAS OH PUBLIC
&&
JDARNLEYThe Pittsburgh radar (KPBZ), 33 km away, was scanning. The volume nearest the first event began at 19:31 UTC.
3 hail, 1 thunderstorm wind. Local standard time, as filed.
A trained spotter reported 8 to 9 trees down in New Cumberland.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in West Virginia in 2010Every state in 2010This day in weather historyWarnings in West Virginia, June 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: 230289, 230286, 230287, 230288.