Low pressure tracked north across western Ohio on the morning of August 10th. This area of low pressure occluded over Lake Erie during the afternoon and pulled a cold front east across northern Ohio.
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 CLE wrote it up.
Low pressure tracked north across western Ohio on the morning of August 10th. This area of low pressure occluded over Lake Erie during the afternoon and pulled a cold front east across northern Ohio. A few thunderstorms became severe, producing strong thunderstorm winds and hail. Damage was reported in the Lake Village Campground near Andover in Ashtabula County when trees fell on cars.
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 Cleveland, OH wrote its last area forecast discussion before the first event at Aug 10, 11:04 AM EST, 1 hour 11 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CLEVELAND OH 1204 PM EDT FRI AUG 10 2012 .SYNOPSIS... A STATIONARY FRONT WILL MOVE LITTLE WHILE LOW PRESSURE MOVES EAST ALONG THE FRONT. THE LOW WILL MOVE INTO SOUTHERN ONTARIO CANADA BY SATURDAY MORNING FORCING A COLD FRONT THROUGH THE AREA. THE LOW WILL MOVE NORTHEAST INTO QUEBEC AND WEAKEN BY SUNDAY MORNING. HIGH PRESSURE IS EXPECTED TO MOVE EAST INTO THE OHIO VALLEY BY SUNDAY MORNING. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... BANDS OF SHOWERS AND THUNDERSTORMS CONTINUE TO DEVELOP IN THE DRY SLOT AS WEAK UPPER LEVEL SHORT WAVES ROTATE THROUGH THE TROUGH. THE AREAL COVERAGE HAS DECREASED BUT SEVERAL SHOWERS ARE STILL OVER THE AREA. I EXPECT MORE SHOWERS TO DEVELOP THIS AFTERNOON. A FEW BREAKS IN THE CLOUD COVER WILL ALLOW THE SUN TO HEAT UP THE BOUNDARY LAYER ENOUGH TO KEEP SHOWER DEVELOPMENT. I WILL ADJUST THE PRECIPITATION FORECAST ACCORDINGLY. I AM CONCERNED ABOUT TEMPERATURES THIS AFTERNOON. TEMPS ARE STRUGGLING WITH THE CLOUD COVER AND PRECIPITATION OVER THE AREA. A FEW BREAKS ARE DEVELOPING WHICH WILL ALLOW TEMPS TO RISE BUT I AM CONCERNED CURRENT FORECAST TEMPS ARE A BIT HIGH. LAMP GUIDANCE SUGGESTS TEMPS IN THE LOW TO MID 70S THIS AFTERNOON. I WILL SHAVE A FEW DEGREES OFF THE HIGHS FOR THE REMAINDER OF THE AFTERNOON. && .SHORT TERM /6 PM THIS EVENING THROUGH MONDAY NIGHT/... PRECIPITATION WILL GRADUALLY PULL OUT TO THE EAST TONIGHT THROUGH SATURDAY NIGHT AS LOW PRESSURE LIFTS UP TO THE NORTHEAST AND HIGH PRESSURE BUILDS IN FROM THE WEST. I THINK BY MID DAY SUNDAY...THE ENTIRE FORECAST AREA SHOULD BE PRECIPITATION FREE AS HIGH PRESSURE BECOMES DOMINANT ACROSS THE AREA. ANOTHER WAVE OF LOW PRESSURE WILL RACE EAST TOWARD THE AREA AND BRING ANOTHER CHANCE FOR SHOWERS AND THUNDERSTORMS INTO THE FORECAST AREA BY MONDAY INTO MONDAY NIGHT. THE BEST CHANCE APPEARS IT WILL BE MONDAY NIGHT ACROSS THE ENTIRE AREA. AS HIGH PRESSURE MOVES EAST...WE START TO SEE A RETURN TO SOUTHERLY FLOW AND WARMING TEMPERATURES. I GRADUALLY WARM TEMPERATURES BACK INTO THE UPPER 70S FOR HIGHS AND LOWER TO MIDDLE 60S FOR LOWS IN THE WARM AIR ADVECTION. && .LONG TERM /TUESDAY THROUGH THURSDAY/... MODELS ARE NOW CONSISTENT BRINGING A FAST MOVING TROUGH ACROSS THE AREA ON TUESDAY. HAVE GIVEN ALL SITES CHANCE POPS FOR THE DAY. HIGH PRESSURE BRIEFLY WILL BUILD OVER THE REGION FOR THE MIDDLE PORTION OF THE WEEK AND WILL TRY FOR DRY WEATHER WEDNESDAY INTO THURSDAY. ANOTHER FAST MOVING SYSTEM WILL BE JUST TO THE WEST AT THE END OF THE PERIOD. TEMPERATURES NEXT WEEK WILL BE SEASONABLE. && .AVIATION /16Z FRIDAY THROUGH TUESDAY/... THE SURFACE LOW CONTINUES TO MOVE N TOWARD WESTERN LAKE ERIE. IFR CONDITIONS ARE OCCURRING TO THE WEST OF THE LOW TRACK WITH MAINLY VFR CIGS TO THE EAST. A FEW PATCHES OF IFR REMAIN IN NE OH BUT THESE ARE NOT EXPECTED TO PERSIST. THE BAND OF SHOWERS WILL MOVE INTO NW PA IN AN HOUR OR TWO. THINK THERE WILL BE SCATTERED SHOWER DEVELOPMENT IN NW OH THIS MORNING. THIS ACTIVITY WILL BE HIT OR MISS. THE POTENTIAL EXISTS FOR THUNDERSTORM DEVELOPMENT AT THE EAST END OF THE AREA LATER THIS AFTERNOON AND HAVE INCLUDED A MENTION IN THE TAFS WHERE NEEDED. CIGS SHOULD BEGIN TO GO DOWN TOWARD EVENING WITH IFR ALL AREAS BY 06Z. SE TO S FLOW WILL CONTINUE TO THE EAST OF THE LOW TRACK WITH W TO SW FLOW ALL AREAS BY 00Z. .OUTLOOK...NON VFR POSSIBLE FRIDAY NIGHT AND SATURDAY ACROSS NE OHIO INTO NW PA. && .MARINE... HAVE ADDED THE MENTION OF WATERSPOUTS TO THE LAKE FORECAST FOR TODAY. WILL LOOK AT NEW DATA TO DETERMINE IF THEY NEED TO BE MENTIONED TOMORROW AS WELL. NE TO E FLOW ON THE LAKE HAS BEGUN TO INCREASE EARLY THIS MORNING. LOW PRESSURE NORTH OF DAYTON WILL MOVE ACROSS THE CENTRAL PORTION OF LAKE ERIE TODAY. THE LOW WILL LINGER TO THE NORTH OF THE LAKE THROUGH MIDDAY SATURDAY AND THEN MOVE NORTHEAST TO QUEBEC BY EARLY SUNDAY. EXPECT SW TO W FLOW TO DEVELOP ON THE LAKE LATER TODAY AS THE LOW MOVES TO THE NORTH. SPEEDS WILL INCREASE THIS EVENING AND WILL NEED TO GO WITH A SMALL CRAFT ADVISORY FOR MOST OF THE NEARSHORE. WILL LIKELY SEE SMALL CRAFT CONDITIONS CONTINUE FOR MOST OF SATURDAY. CONDITIONS SHOULD IMPROVE SUNDAY AS THE FLOW BECOMES MORE SW. SW FLOW WILL THEN CONTINUE TILL A TROUGH CROSSES THE LAKE ON TUESDAY CAUSING THE FLOW TO AGAIN BECOME WESTERLY. && .CLE WATCHES/WARNINGS/ADVISORIES... OH...NONE. PA...NONE. MARINE...NONE. && SYNOPSIS...LOMBARDY NEAR TERM...GARNET SHORT TERM...LOMBARDY LONG TERM...KUBINA AVIATION...KUBINA MARINE...KUBINA/OUDEMAN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CLEVELAND OH 354 AM EDT FRI AUG 10 2012 LEZ142>148-162>168-OHZ003-006>014-017>023-027>033-036>038-047-089- 110800- MAUMEE BAY TO RENO BEACH OH-RENO BEACH TO THE ISLANDS OH- THE ISLANDS TO VERMILION OH-VERMILION TO AVON POINT OH- AVON POINT TO WILLOWICK OH-WILLOWICK TO GENEVA-ON-THE LAKE OH-GENEVA- ON-THE-LAKE TO CONNEAUT OH- LAKE ERIE OPEN WATERS FROM MAUMEE BAY TO RENO BEACH- LAKE ERIE OPEN WATERS FROM RENO BEACH TO THE ISLANDS- LAKE ERIE OPEN WATERS FROM THE ISLANDS TO VERMILION- LAKE ERIE OPEN WATERS FROM VERMILION TO AVON POINT- LAKE ERIE OPEN WATERS FROM AVON POINT TO WILLOWICK- LAKE ERIE OPEN WATERS FROM WILLOWICK TO GENEVA-ON-THE-LAKE- LAKE ERIE OPEN WATERS FROM GENEVA-ON-THE-LAKE TO CONNEAUT-LUCAS-WOOD- OTTAWA-SANDUSKY-ERIE OH-LORAIN-CUYAHOGA-LAKE-GEAUGA-ASHTABULA INLAND- HANCOCK-SENECA-HURON-MEDINA-SUMMIT-PORTAGE-TRUMBULL-WYANDOT-CRAWFORD- RICHLAND-ASHLAND-WAYNE-STARK-MAHONING-MARION-MORROW-HOLMES-KNOX- ASHTABULA LAKESHORE- 354 AM EDT FRI AUG 10 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR LAKE ERIE...NORTH CENTRAL OHIO...NORTHEAST OHIO AND NORTHWEST OHIO. .DAY ONE...TODAY AND TONIGHT. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED. LEZ061-149-169-PAZ001>003-110800- LAKE ERIE OPEN WATERS FROM RIPLEY TO BUFFALO NY- CONNEAUT OH TO RIPLEY NY- LAKE ERIE OPEN WATERS FROM CONNEAUT OH TO RIPLEY NY-NORTHERN ERIE- SOUTHERN ERIE-CRAWFORD PA- 354 AM EDT FRI AUG 10 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR LAKE ERIE AND NORTHWEST PENNSYLVANIA. .DAY ONE...TODAY AND TONIGHT. THERE IS A SLIGHT RISK FOR SEVERE THUNDERSTORMS TODAY. THE MAIN THREATS WILL BE GUSTY WINDS AND POSSIBLY LARGE HAIL. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED. LOMBARDY
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CLEVELAND OH
913 AM EDT FRI AUG 10 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0818 PM TSTM WND DMG LINESVILLE 41.66N 80.42W
08/09/2012 CRAWFORD PA EMERGENCY MNGR
TREES DOWN AT WEST CENTER ROAD AND MAPLE ROAD.
&&
SJAMISONThe Cleveland radar (KCLE), 110 km away, was scanning. The volume nearest the first event began at 17:15 UTC.
1 thunderstorm wind, 1 hail. Local standard time, as filed.
Emergency manager reported several trees down in the Lake Village Campground near Andover. The media confirmed the downed trees with some damage to cars in the park.
Trained spotters and the general public reported dime to quarter size hail from Kirtland Hills to the Concord Airpark.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2012Every state in 2012This day in weather historyWarnings in Ohio, August 2012
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: 410303, 410304.