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, 5:07 AM EST, 2 hours 53 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE PITTSBURGH PA 607 AM EDT FRI JUN 4 2010 .SYNOPSIS... UNSETTLED WEATHER IS EXPECTED TO PERSIST THROUGH THE WEEKEND. && .NEAR TERM /THROUGH TONIGHT/... CURRENT ISOLATED THUNDERSTORMS ARE DEMONSTRATING THE DEGREE OF INSTABILITY OVER THE REGION. HOWEVER...WITH LITTLE TO FOCUS ADDITIONAL CONVECTION ON THIS MORNING...ISOLATED IS ALL THAT IS EXPECTED. LOW LEVEL MOISTURE HAS ALSO CONTRIBUTED TO PATCHY FOG...WHICH SHOULD DISSIPATE QUICKLY AFTER SUNRISE. DIURNAL EFFECTS WILL INCREASE CHANCE OF STORMS FOR THIS AFTERNOON...AS CAPES RUN UP TO CLOSE 1000. THE CHANCE FOR STORMS WILL CONTINUE IN TO TONIGHT AS A COOL FRONTAL BOUNDARY APPROACHES. WITH THIS ADDITIONAL FOCUS MECHANISM IN AN ALREADY UNSTABLE AIRMASS...A FEW OF THIS STORMS COULD GO SEVERE TONIGHT. && .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 /10Z 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. && .EQUIPMENT... THE WSR 88D AT PITTSBURGH...KPBZ...IS OPERATIONAL BUT IN DEGRADED MODE DUE TO LOW POWER OUTPUT. ADDITIONAL PARTS ARE ON ORDER AND MORE MAINTENANCE WILL BE COMPLETED DURING THE NEXT COUPLE OF DAYS. ALTERNATE RADARS INCLUDE KRLX...KILN...KCLE...AND KCCX. && .PBZ WATCHES/WARNINGS/ADVISORIES... MD...NONE. OH...NONE. PA...NONE. WV...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE PITTSBURGH PA 320 AM EDT FRI JUN 4 2010 OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>022-029- WVZ001>004-050730- TUSCARAWAS-CARROLL-COLUMBIANA-COSHOCTON-HARRISON-JEFFERSON OH- MUSKINGUM-GUERNSEY-BELMONT-NOBLE-MONROE-MERCER-VENANGO-FOREST- LAWRENCE-BUTLER-CLARION-JEFFERSON PA-BEAVER-ALLEGHENY-ARMSTRONG- WASHINGTON-HANCOCK-BROOKE-OHIO-MARSHALL- 320 AM EDT FRI JUN 4 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL OHIO...NORTHWEST PENNSYLVANIA...SOUTHWEST PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA AND NORTHERN PANHANDLE OF WEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT. THERE IS A SLIGHT CHANCE FOR SEVERE WEATHER TONIGHT. THE MAIN HAZARDS WILL BE STRONG WINDS AND HAIL. .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 STRONG WINDS AND HAIL. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES. MDZ001-PAZ023-030>032-WVZ012-021>023-041-050730- GARRETT-INDIANA-WESTMORELAND-GREENE-FAYETTE-WETZEL-MARION-MONONGALIA- PRESTON-TUCKER- 320 AM EDT FRI JUN 4 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR WESTERN MARYLAND...SOUTHWEST PENNSYLVANIA...WEST CENTRAL PENNSYLVANIA AND NORTHERN WEST VIRGINIA. .DAY ONE...TODAY AND TONIGHT. THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THERE IS A SLIGHT RISK FOR SEVERE WEATHER SATURDAY MORNING...THEN AGAIN SATURDAY NIGHT INTO SUNDAY. THE MAIN HAZARDS WILL BE STRONG WINDS AND HAIL. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS ACCORDING TO STANDARD OPERATING PROCEDURES.
The national radar mosaic for the moment the first event began.
17 hail, 7 thunderstorm wind, 2 flood, 2 funnel cloud. Local standard time, as filed.
Law enforcement reported several roads flooded in ST. Clairsville.
Law enforcement reported numerous trees down near ST. Clairsville and the southern part of Belmont county.
Law enforcement reported large trres down and boats blown onto the shore at Tappan Lake.
A trained spotter reported large trees down along SR 22 near Wintersville.
A trained spotter reported a funnel cloud over Sherrodsville.
Emergency management reported a funnel cloud over Sherrodsville.
Law enforcement reported large branches and power lines down west of Brilliant.
Emergency management reported trees down near New Athans along SR 149.
Law enforcement reported trees down near Spring Mountain.
Emergency management reported trees and power lines down in Flushing.
Emergency management reported road and basement flooding in ST. Clairsville, Neffs, and Warnock.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2010Every state in 2010This day in weather historyWarnings in Ohio, 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: 230224, 230261, 230236, 230237, 230238, 230239, 230240, 230241, 230248, 230263, 230249, 230250, 230264, 230251, 230233, 230234, 230267, 230252, 230253, 230254, 230268, 230270, 230271, 230255, 230257, 230258, 230259, 230230.