In a hot and humid air, thunderstorms moved through southeast Ohio during the afternoon. Low level convergence was aided by a leftover boundary from convection during the early morning hours.
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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 RLX wrote it up.
In a hot and humid air, thunderstorms moved through southeast Ohio during the afternoon. Low level convergence was aided by a leftover boundary from convection during the early morning hours. The thunderstorms moved southeast around 30 mph with wind gusts the main hazard. The tall thunderstorms also produced considerable cloud to ground lightning. Brief repetitive showers increased concerns for flash flooding across Meigs County, but no flooding occurred.
Another prefrontal cluster of showers and thunderstorms moved into southeast Ohio during the late evening hours.
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 Charleston, WV wrote its last area forecast discussion before the first event at Aug 4, 9:23 AM EST, 4 hours 2 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHARLESTON WV 1023 AM EDT WED AUG 4 2010 .SYNOPSIS... UPPER LEVEL DISTURBANCES AND THEN AN APPROACHING COLD FRONT WILL BRING UNSETTLED WEATHER INTO THURSDAY WITH SHOWERS AND THUNDERSTORMS. HIGH PRESSURE WILL FOLLOW FOR FRIDAY AND THE WEEKEND. && .NEAR TERM /THROUGH TONIGHT/... TWEAKED POPS DOWNWARD FOR A FEW HOURS FOR THE MID MORNING AND EARLY AFTERNOON HOURS NOW THAT MCS HAS MOVED THROUGH THE AREA. LEFT THE IDEA OF INCREASING POPS IN THE LATE AFTERNOON OVER THE NORTHERN TIER IN PLACE. ANOTHER MCS...CURRENTLY OVER NE IL AND NW IN...WILL TRACK ACROSS THE NORTHERN PERIPHERY OF THE CWA. ANY OUTFLOW BOUNDARIES FROM THIS FEATURE DROPPING SWD INTO THE CWA WILL LIKELY FIRE OFF A ROUND OF CONVECTION FOR NRN WV AND SE OH LATER THIS AFTERNOON...LASTING INTO THE EARLY EVENING HOURS. IN ADDITION...THERE ARE A FAIR AMOUNT OF RESIDUAL LOW LEVEL BOUNDARIES IN PLACE OVER THE CWA FROM MORNING CONVECTION. THESE COULD ALSO ACT AS A TRIGGER FOR CONVECTIVE DEVELOPMENT. THUS...WILL CONTINUE THE SLIGHTLY BROAD BRUSHED APPROACH TOP POPS...KEEPING LIKELY VALUES FURTHER NORTH. PW VALUES HOVERING AROUND 2 INCHES...WITH MODERATELY UNSTABLE CONDITIONS. WITH THE HIGH FZL...MAIN THREAT WILL BE WINDS AND HEAVY RAINS. OTHERWISE...PREVIOUS FORECAST TRENDS STILL HOLD. && .SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/... SHORT TERM WILL BE DOMINATED BY THE COLD FRONT PASSAGE THAT WILL BRING ORGANIZED CHANCES FOR SHOWERS AND THUNDERSTORMS THROUGH THE CWA THURSDAY AND THURSDAY NIGHT. FLOW ALOFT BECOMES CYCLONIC...AND ATMOSPHERE WILL REMAIN PRIMED FOR HEAVY DOWNPOURS WITH PRECIPITABLE WATER VALUES OVER 2 INCHES AGAIN. WILL NEED TO WATCH CAREFULLY DESPITE FLASH FLOOD GUIDANCE NUMBERS THAT HAVE HAD A SIGNIFICANT AMOUNT OF TIME TO RECOVER...ESPECIALLY IN SOUTHEAST OHIO AND NORTHEAST KENTUCKY...ALTHOUGH THESE MAY BE ALTERED SIGNIFICANTLY GIVEN THE POTENTIAL FOR CONVECTION TODAY. STORMS WILL GET AN ASSIST FROM A 30KT LOW LEVEL JET AS DEPICTED BY THE NAM AT 850HPA. INSTABILITY WILL NOT BE A PROBLEM...ESPECIALLY WITH DEWPOINTS THAT WILL PUSH THE LOW 70S...MAKING FOR PRIMARILY MOIST ADIABATIC PROFILES. FEEL THE 850HPA JET COULD BE A GOOD INDICATOR OF WHEN STORMS WILL DISSIPATE INTO EARLY THURSDAY NIGHT. HIGH PRESSURE FOLLOWS THE FRONT...ALONG WITH 500HPA HEIGHTS DROPPING BACK INTO THE LOW 580S...AND AIR WILL BE DRIER. THE LACK OF MOISTURE WILL BE MORE EVIDENT ALOFT THAN IT WILL BE AT THE IMMEDIATE SURFACE...WITH DEWPOINTS STILL LIKELY RUNNING IN THE 60S ACROSS THE LOWLANDS. REGARDLESS...WILL STILL FEEL LIKE A CHANGE OF AIRMASS IN A RELATIVE SENSE...GIVEN THE CONDITIONS SEEN OVER THE LAST FEW DAYS. LOW SIDE OF GUIDANCE TEMPERATURES STILL LOOK PRETTY GOOD...THAT IS...NOT THE GFS MOS...ESPECIALLY WITH THE MET AND LOCAL MOS PERFORMING WELL AS OF LATE. && .LONG TERM /SATURDAY THROUGH TUESDAY/... KEPT EXTENDED ON TRACK WITH PREVIOUS FORECAST KEEPING MAINLY DRY CONDITIONS IN THROUGH EARLY NEXT WEEK. FRONTAL BOUNDARY DIPS WELL SOUTH FRI EVENING WITH MUCH DRIER AIR WORKING IN BEHIND. CONSIDERABLE RUN TO RUN AGREEMENT ON GFS/ECMWF WITH DRIFTING A SURFACE HIGH OVERHEAD THIS WEEKEND. ALL IN ALL ITS SHAPING UP TO BE A NICE WEEKEND AHEAD. DIVERGING SOLUTIONS ON THE HANDLING OF A LOW PRESSURE SYSTEM MIDWEEK NEXT WEEK. 06Z GFS DEVELOPS SURFACE LOW AND DEEPENS IT WHILE TRACKING ACROSS GREAT LAKES TUES AND WEDS. 00Z ECMWF IS MUCH SLOWER AND WEAKER IN THE DEVELOPMENT OF THIS LOW. NOT REALLY TOO CONCERNED AT THIS POINT WITH PLACEMENT AND TIMING OF POPS...BUT HAVE INITIALLY SIDED WITH THE ECMWF SOLUTION. TEMPS THIS WEEKEND WILL ONCE AGAIN BECOME MODERATED IN THE POST FRONTAL ENVIRONMENT...HAVE HIGHS REACHING LOW TO MID 80S ACROSS CWA SAT AND SUN. ANOTHER WARM UP EXPECTED EARLY INTO NEXT WEEK AS UPPER RIDGE STARTS TO NOSE IN FROM THE SOUTHWEST. && .AVIATION /14Z WEDNESDAY THROUGH SUNDAY/... 12Z WEDNESDAY THRU 12Z THURSDAY... CONVECTIVE COMPLEX CURRENTLY OVER SOUTHEAST OHIO AND NORTHWESTERN WEST VIRGINIA AT 11Z WILL ROLL SOUTHEASTWARD ACROSS MUCH OF THE CWA THIS MORNING. EXPECT GENERALLY VFR CEILINGS AND MVFR HAZE AND FOG THRU 15Z OUTSIDE CONVECTION...LOCALLY IFR IN CONVECTION. EXPECT CONVECTION TO REACH A CKB-CRW LINE BY 12Z..THEN WEAKEN AND EXIT THE MOUNTAINS BY 16Z. AFTER 17Z...GENERALLY VFR WITH SCATTERED AFTERNOON CONVECTION. AFTER 00Z...GENERALLY BECOMING MVFR IN HAZE AND FOG...WITH CONVECTION INCREASING OVER OUR FAR NORTHWEST OHIO ZONES AFTER 06Z AS COLD FRONT VERY SLOWLY APPROACHES FORM THE WEST. PKB TAF CONTINUES AMD NOT SKED WITH COMMS PROBLEMS KEEPING OB FROM GOING OUT. FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 12Z THURSDAY... FORECAST CONFIDENCE: MEDIUM CONFIDENCE IN CONDITIONS LOWERING TO IFR IN PRECIPITATION THIS MORNING. HIGH CONFIDENCE CONDITIONS WILL IMPROVE TO VFR BY WED AFTERNOON BEFORE MEDIUM TO LOW CONFIDENCE IN SHOWERS AND THUNDERSTORMS LATER TONIGHT. ALTERNATE SCENARIOS: TIMING AND EXTENT OF AFTERNOON CONVECTION MAY BE MORE WIDESPREAD IF AN UPPER DISTURBANCE MOVES OVER LEFT OVER BOUNDARIES. EXPERIMENTAL TABLE OF FLIGHT CATEGORY OBJECTIVELY SHOWS CONSISTENCY OF WFO FORECAST TO AVAILABLE MODEL INFORMATION: H = HIGH: TAF CONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL. M = MEDIUM: TAF HAS VARYING LEVEL OF CONSISTENCY WITH MODELS. L = LOW: TAF INCONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL. UTC 1HRLY 11 12 13 14 15 16 17 18 19 20 21 22 EDT 1HRLY 07 08 09 10 11 12 13 14 15 16 17 18 CRW CONSISTENCY M M M M M H H H H H H H HTS CONSISTENCY M M M M H H H H H H H H BKW CONSISTENCY H H H M M M H H H H H H EKN CONSISTENCY M M M M M H H H H M M H PKB CONSISTENCY M M M H H H H H H H H H CKB CONSISTENCY M M M H H H H H H H H H AFTER 12Z THURSDAY... IFR POSSIBLE IN CONVECTION THURSDAY. && .EQUIPMENT... PKB ASOS OBSERVATION SHOULD BE AVAILABLE. && .RLX WATCHES/WARNINGS/ADVISORIES... WV...NONE. OH...NONE. KY...NONE. VA...NONE. && SYNOPSIS...26/JMV NEAR TERM...KMC SHORT TERM...26 LONG TERM...TAX AVIATION...JMV EQUIPMENT...
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHARLESTON WV 225 PM EDT WED AUG 4 2010 KYZ101-103-OHZ066-067-075-076-083>087-WVZ006>011-014>020-027>032- 036>040-046-047-051830- GREENUP-BOYD-PERRY-MORGAN-ATHENS-WASHINGTON-JACKSON OH-VINTON-MEIGS- GALLIA-LAWRENCE OH-CABELL-MASON-JACKSON WV-WOOD-PLEASANTS-TYLER- PUTNAM-KANAWHA-ROANE-WIRT-CALHOUN-RITCHIE-DODDRIDGE-CLAY-BRAXTON- GILMER-LEWIS-HARRISON-TAYLOR-FAYETTE-NICHOLAS-WEBSTER-UPSHUR-BARBOUR- POCAHONTAS-RANDOLPH- 225 PM EDT WED AUG 4 2010 ...SEVERE THUNDERSTORM WATCH 567 IN EFFECT UNTIL 9 PM EDT THIS EVENING... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST KENTUCKY...SOUTHEAST OHIO AND MUCH 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. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THURSDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. KYZ102-105-VAZ003-004-WVZ005-013-024>026-033>035-051830- CARTER-LAWRENCE KY-DICKENSON-BUCHANAN-WAYNE-LINCOLN-MINGO-LOGAN- BOONE-MCDOWELL-WYOMING-RALEIGH- 225 PM EDT WED AUG 4 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST KENTUCKY...SOUTHWEST VIRGINIA...SOUTHERN WEST VIRGINIA AND WESTERN WEST VIRGINIA. .DAY ONE...THIS AFTERNOON AND TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THURSDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED.
The Cincinnati radar (KILN), 144 km away, was scanning. The volume nearest the first event began at 18:25 UTC.
13 thunderstorm wind. Local standard time, as filed.
A tree and other large branches fell across Tunnel Hill Road.
Several trees were blown down.
A tree fell onto power lines. Other large branches were blown down.
A tree and other large branches fell across Route 155 near Drakes.
A tree and other large branches were blown down.
Large branches were blown down near Burr Oak Lake.
Large branches and a tree fell across Route 78.
Several trees were blown down.
Trees fell onto power lines along Route 143.
Trees fell along Forest Run Road in Sutton Township.
Large branches were blown down.
Trees were blown down.
Several trees and large branches were blown down. Electric power outages occurred.
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, 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: 246888, 246876, 246877, 246881, 246891, 246897, 246893, 246900, 246905, 246909, 246911, 246913, 246918.