Knox County resided in the warm and moist sector during the early through late evening of the 5th as a cold front swept eastward from northwestern IN and the Lower Ohio Valley to far-western OH and far-southeastern IN. Ahead of the cold front, scattered thunderstorms, including supercells, developed along a surface trough axis and resided in an environment favorable for tornadic supercells.
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.
Knox County resided in the warm and moist sector during the early through late evening of the 5th as a cold front swept eastward from northwestern IN and the Lower Ohio Valley to far-western OH and far-southeastern IN. Ahead of the cold front, scattered thunderstorms, including supercells, developed along a surface trough axis and resided in an environment favorable for tornadic supercells. This environment was comprised of moderate MUCAPE and effective bulk shear, respectively, and favorably-low mixed layer lifting condensation levels near 750 meters AGL. An approaching mesoscale convective vortex from southwest OH backed surface winds over and near Knox County, which lead to to significant veering and strengthening of low-level winds with height and surface-based effective storm-relative helicity of about 150 meters squared per second squared. One supercell in particular tracked generally eastward and then northeastward across southern and eastern portions of Knox County. This storm produced one tornado and one instance of straight-line wind damage. Heavy rainfall rates from the storms throughout the evening produced localized flash flooding in portions of Know, Morrow, and Crawford Counties.
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 Jun 5, 3:06 PM EST, 1 hour 54 minutes earlier.
Area Forecast Discussion National Weather Service Cleveland OH 406 PM EDT Wed Jun 5 2024 .SYNOPSIS... A cold front will cross the area this evening into tonight with a secondary cold front following on Thursday. A trough will persist over the Great Lakes late this week through the weekend. && .NEAR TERM /THROUGH THURSDAY NIGHT/... Clearing is still occurring across the area and have seen rapid destabilization with SBCAPE values approaching 2000-2500 J/kg near the I-75 corridor and MLCAPE values approaching 1000-1500 J/kg in the western half of the CWA. A line of storms, currently over the I-75 corridor, will move farther east into the area over the next several hours before exiting to the east later this evening. CAMs have generally underestimated the amount of destabilization this afternoon and most high res guidance from earlier in the day has held off on stronger convection until the cold front (currently over eastern IL) approached from the west late this afternoon into this evening. Based on how things are looking right now, this line should be the main show with benign showers/thunderstorms with the front later this evening since the atmosphere will be worked over. Given the amount of moisture (PW values are over 1.5 inches which is well above normal for this time of year), buoyancy/CAPE, and effective bulk shear values to 20 to 25 knots, there may be isolated damaging wind gusts/downbursts. So far there have only been a couple of instances of wind gusts over 40 knots (still below severe limits), but the severe weather risk may increase at least a little bit as clearing and destabilization continue late this afternoon. Heavy rain will be a big concern since PW values are so high, CAPE profiles are tall and skinny, and warm cloud layers are deep. Storm motion may be a hair fast, but torrential rainfall rates and potential for backbuilding could result in flooding primarily in low- lying and urban areas. Can't totally rule out isolated large hail since instability is a bit higher than previously anticipated, however the tornado threat remains low since shear values are marginal. The severe weather risk will diminish throughout the evening as diurnal instability wanes. Long story short, isolated damaging wind gusts and heavy rain/flooding are the main threats today. Scattered showers will likely persist behind the line of convection and ahead of the front tonight. The front should be to the east of the area by mid-morning Thursday, but the next trough/reinforcing surface cold front will pivot across the area by Thursday afternoon/evening. Moisture will be somewhat limited, but there will still be slight chance to chances of scattered showers and isolated thunderstorms. Lake-enhanced rain chances increase further across NE OH and NW PA Thursday night as cold air advection settles in behind the reinforcing cold front and 850mb temperatures fall to 5 to 10C. Tonight's lows will be in the low to mid 60s with highs reaching the mid to upper 70s Thursday. Cyclonic flow aloft in addition to cold air advection will result in cooler minimum temperatures in the low to mid 50s. && .SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/... Aloft, cyclonic W'erly to NW'erly flow and embedded shortwave disturbances affect our region through the short-term period as a mid/upper-level low wobbles E'ward and then NE'ward from near Georgian Bay to near central QC. At the surface, troughing lingers over/near our CWA and trough axes will accompany the aforementioned shortwave disturbances. This pattern will maintain a chilly air mass for early June across northern OH and NW PA. Periods of isolated to scattered rain showers are expected due to moist isentropic ascent preceding shortwave trough axes, low-level convergence/moist ascent along attendant surface trough axes, and the presence of potential instability in the surface to roughly 850 mb layer. Daytime heating of the relatively-moist boundary layer coinciding with considerably colder air farther aloft should yield weak, yet sufficient mixed layer CAPE for isolated thunderstorm development each afternoon through early evening. The greatest potential and coverage of convection are expected each afternoon through early evening because a typical diurnal cycle in boundary layer temperatures and instability is expected. In addition, a sufficiently-cold/moist low/mid-level atmospheric column and the seeder-feeder process should support periods of lake-enhanced rain over/generally east or southeast of ~18C Lake Erie, in/near our snowbelt counties, during the late evening through morning hours of Friday into Saturday and Saturday into Sunday. Late afternoon highs should reach the mid 60's to lower 70's on Friday and the upper 60's to mid 70's on Saturday. Overnight lows should reach mainly the upper 40's to mid 50's around daybreak Saturday and mainly the 50's around daybreak Sunday. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... Cyclonic W'erly to NW'erly flow aloft and embedded shortwave disturbances should continue to affect our region on Sunday through Monday. At the surface, troughing persists over/near the eastern Great Lakes and Upper OH Valley, and multiple trough axes will accompany the shortwave disturbances. This pattern at the surface and aloft will allow an unusually-cool air mass to remain entrenched across our CWA. Periods of isolated to scattered showers and thunderstorms are expected for the same reasons noted in the short- term discussion. The greatest potential and coverage of convection are expected each afternoon through early evening due to a continued typical diurnal cycle in boundary layer temperatures and instability, and self-destructive sunshine. Periods of lake-enhanced rain remain possible over and generally east or southeast of Lake Erie Sunday morning and again Sunday evening into Monday morning for the same reasons noted in the short-term discussion. Daily afternoon highs are forecast to reach the mid 60's to mid 70's. Overnight lows should reach mainly the 50's around daybreak Monday morning. Odds favor fair weather on Monday night through Tuesday night as the cyclonic flow aloft and associated surface troughing exit generally E'ward, a ridge at the surface and aloft builds generally E'ward over/near our CWA, and stabilizing subsidence accompanies the ridge. Low-level WAA will eventually impact northern OH and NW PA as our CWA becomes located generally west of the low-level ridge axis. Overnight lows should reach mainly the upper 40's to upper 50's around daybreak Tuesday and be followed by highs in the lower 70's to lower 80's late Tuesday afternoon. Overnight lows should then reach mainly the 50's to lower 60's around daybreak Wednesday. At the surface and aloft, the ridge should begin to exit E'ward on Wednesday as a trough begins to enter from the Upper Midwest and vicinity. A few showers and thunderstorms are possible on Wednesday as low-level isentropic ascent preceding the trough axis aloft coincides with increasing low-level moisture from the Gulf of Mexico and releases at least weak instability, including elevated instability. Late afternoon highs should reach mainly the mid 70's to lower 80's. && .AVIATION /18Z Wednesday THROUGH Monday/... Line of thunderstorms will move across the area this afternoon into this evening as a cold front approaches from the west and there will likely be periods of non-VFR visibilities within thunderstorms. There may be brief gusts to 35+ knots in stronger storms, best chance at western terminals (including KTOL/KFDY) and generally expect storms to gradually weaken as they move east this evening, hence slightly lower thunderstorm wind gusts gusts at terminals east of KTOL/KFDY. Showers may linger into late evening with MVFR ceilings likely primarily at eastern terminals overnight into early Thursday morning. Some guidance suggests potential for a period of IFR conditions at KCAK/KYNG/KERI early Thursday morning, but confidence is low so opted to maintain MVFR for the time being. Ceilings should gradually improve from west to east towards the end of the period, but can't rule out widely scattered showers and isolated thunderstorms as a trough pushes across the area during the day Thursday. Outside of thunderstorms, winds will be out of the south/southwest at 10 to 15 knots with gusts to 20 to 25 knots through early evening before diminishing to 5 to 10 knots tonight. Winds become more westerly early Thursday morning and will increase to 10 to 15 knots with gusts to 20 to 25 knots likely towards the very end of the TAF period. Outlook...Non-VFR will be possible with scattered rain showers and isolated afternoon thunderstorms Thursday afternoon through Monday. && .MARINE... A cold front is still poised to sweep E'ward across Lake Erie this evening through early Thursday morning and clear Lake Erie by daybreak. Otherwise, a trough lingers over the lake. The cold front's passage will cause SSE'erly to SW'erly winds around 5 to 15 knots to veer toward W'erly. Waves remain 3 feet or less through Thursday. Occasional 4 footers are possible east of The Islands on Thursday, especially in open waters. Winds around 10 to 20 knots are expected to vary between SW'erly and NW'erly on Thursday night through Sunday as a trough continues to linger over Lake Erie. Waves are expected to be as large as 3 to 6 feet east of The Islands and 3 feet or less elsewhere. One or multiple Small Craft Advisories and Beach Hazards Statements for the adjacent shore will likely be needed. W'erly to N'erly winds around 5 to 15 knots are expected Sunday night into Monday as the trough weakens over the eastern Great Lakes region and a ridge attempts to begin to build from the north-central United States. Waves are expected to subside to 3 feet or less. && .CLE WATCHES/WARNINGS/ADVISORIES... OH...None. PA...None. NY...None. MARINE...None. && SYNOPSIS...Maines NEAR TERM...Maines SHORT TERM...Jaszka LONG TERM...Jaszka AVIATION...Maines MARINE...Jaszka
Hazardous Weather Outlook National Weather Service Cleveland OH 514 AM EDT Wed Jun 5 2024 LEZ061-142>149-162>169-060915- Ripley to Buffalo NY extending from 5NM off shoreline to US- Canadian border-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- Conneaut OH to Ripley NY- Detroit River Lt. to Maumee Bay OH to Reno Beach OH beyond 5NM offshoreline to US-Canadian border- Reno Beach to The Islands OH beyond 5NM off shoreline to US- Canadian border- The Islands to Vermilion OH beyond 5 nm off shoreline to US- Canadian border- Vermilion to Avon Point OH beyond 5 nm off shoreline to US- Canadian border- Avon Point to Willowick OH beyond 5 nm off shoreline to US- Canadian border-Willowick to Geneva-on-the- Lake OH beyond 5NM off shoreline to US-Canadian border-Geneva-on-the- Lake to Conneaut OH beyond 5 nm off shoreline to US-Canadian border- Conneaut OH to Ripley NY beyond 5 nm off shoreline to US- Canadian border- 514 AM EDT Wed Jun 5 2024 This Hazardous Weather Outlook is for Lake Erie. .DAY ONE...Today and tonight. Thunderstorms are expected between 4-11 PM today with a marginal risk (level 1 of 5) for severe weather. Damaging winds are the primary severe weather hazard. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. OHZ003-006>014-017>023-027>033-036>038-047-089-PAZ001>003-060915- Lucas-Wood-Ottawa-Sandusky-Erie-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-Northern Erie-Southern Erie- 514 AM EDT Wed Jun 5 2024 This Hazardous Weather Outlook is for north central Ohio, northeast Ohio, northwest Ohio and northwest Pennsylvania. .DAY ONE...Today and tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Thunderstorms are expected between 4-11 PM today with a marginal risk (level 1 of 5) for severe weather. Damaging winds are the primary severe weather hazard. Heavy rainfall may also lead to localized flooding. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. Please relay any information about observed severe weather to the NWS.
Special Weather Statement
National Weather Service Cleveland OH
349 PM EDT Wed Jun 5 2024
OHZ003-007-052015-
Ottawa OH-Lucas OH-
349 PM EDT Wed Jun 5 2024
...A STRONG THUNDERSTORM WILL IMPACT OTTAWA AND NORTHEASTERN LUCAS
COUNTIES THROUGH 415 PM EDT...
At 349 PM EDT, Doppler radar was tracking a strong thunderstorm over
Genoa, or 13 miles southeast of Toledo, moving east at 40 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Oregon, Northwood, Oak Harbor, Genoa, Elmore, Millbury, Rocky Ridge,
Clay Center, Reno Beach, Williston, and Bono.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4170 8333 4166 8325 4164 8323 4161 8309
4155 8303 4147 8314 4146 8316 4146 8333
4150 8335 4150 8341 4162 8342
TIME...MOT...LOC 1949Z 251DEG 37KT 4155 8336
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
KahnSpecial Weather Statement
National Weather Service Cleveland OH
412 PM EDT Wed Jun 5 2024
OHZ018-019-028-029-052100-
Seneca OH-Crawford OH-Huron OH-Richland OH-
412 PM EDT Wed Jun 5 2024
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN HURON...
NORTHWESTERN RICHLAND...SOUTHEASTERN SENECA AND NORTHERN CRAWFORD
COUNTIES THROUGH 500 PM EDT...
At 412 PM EDT, Doppler radar was tracking a strong thunderstorm 7
miles southwest of Chatfield, or 7 miles northwest of Bucyrus, moving
northeast at 35 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Bucyrus, Willard, Plymouth, New Washington, Chatfield, Attica,
Benton, North Fairfield, Tiro, Oceola, and Sulpher Springs.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4096 8311 4122 8272 4097 8249 4077 8311
TIME...MOT...LOC 2012Z 237DEG 32KT 4089 8305
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
KahnSpecial Weather Statement
National Weather Service Cleveland OH
427 PM EDT Wed Jun 5 2024
OHZ007>009-052115-
Erie OH-Ottawa OH-Sandusky OH-
427 PM EDT Wed Jun 5 2024
...A STRONG THUNDERSTORM WILL IMPACT OTTAWA...ERIE AND CENTRAL
SANDUSKY COUNTIES THROUGH 515 PM EDT...
At 427 PM EDT, Doppler radar was tracking a strong thunderstorm near
Oak Harbor, or 9 miles north of Fremont, moving east at 35 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Sandusky, Fremont, Port Clinton, Kelleys Island, Put-In-Bay, Oak
Harbor, Gibsonburg, Woodville, Elmore, Catawba Island, Marblehead,
Lindsey, Rocky Ridge, Helena, Whites Landing, and Stony Prairie.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4144 8340 4160 8315 4152 8297 4151 8299
4152 8290 4172 8283 4153 8282 4162 8267
4150 8271 4145 8304 4142 8294 4147 8283
4147 8266 4146 8270 4145 8267 4130 8341
TIME...MOT...LOC 2027Z 251DEG 30KT 4147 8318
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
KahnPreliminary Local Storm Report
National Weather Service Cleveland OH
442 PM EDT Wed Jun 5 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0400 PM Tstm Wnd Gst 16 NE Harbor View 41.83N 83.19W
06/05/2024 M49 MPH LEZ162 OH Mesonet
Mesonet station THLO1 9 SSE Stony Point.
&&
GaruckasSpecial Weather Statement
National Weather Service Cleveland OH
527 PM EDT Wed Jun 5 2024
OHZ028-036-037-052215-
Crawford OH-Marion OH-Morrow OH-
527 PM EDT Wed Jun 5 2024
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL MARION...NORTHERN MORROW
AND SOUTHEASTERN CRAWFORD COUNTIES THROUGH 615 PM EDT...
At 527 PM EDT, Doppler radar was tracking a strong thunderstorm near
Marion, moving northeast at 20 mph.
HAZARD...Wind gusts up to 40 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor hail damage to vegetation is
possible.
Locations impacted include...
Marion, Galion, Caledonia, Green Camp, North Robinson, and Iberia.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4050 8308 4051 8325 4064 8320 4084 8286
4063 8267
TIME...MOT...LOC 2127Z 237DEG 18KT 4061 8304
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
KahnSpecial Weather Statement
National Weather Service Cleveland OH
549 PM EDT Wed Jun 5 2024
OHZ010-020-052215-
Medina OH-Lorain OH-
549 PM EDT Wed Jun 5 2024
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL MEDINA AND SOUTHERN
LORAIN COUNTIES THROUGH 615 PM EDT...
At 549 PM EDT, Doppler radar was tracking a strong thunderstorm near
Wellington, or 16 miles west of Medina, moving northeast at 30 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Medina, Brunswick, Grafton, Wellington, Lagrange, Penfield, Spencer,
Rochester, Valley City, and Eaton Estates.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.
&&
LAT...LON 4107 8234 4119 8234 4134 8193 4116 8177
4106 8218
TIME...MOT...LOC 2149Z 237DEG 26KT 4112 8218
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
KahnThe Cleveland radar (KCLE), 111 km away, was scanning. The volume nearest the first event began at 22:01 UTC.
2 flash flood, 1 tornado, 1 thunderstorm wind. Local standard time, as filed.
Reports and photos of six inches or more of flowing water over Stetzer Road east of Bucyrus. Water across the roadways also reported along portions of OH-96 in eastern Crawford County. Radar estimated 2 to 2.5 inches of rainfall in a 75-90 minute period.
An EF0 tornado with estimated peak winds of 80 mph formed near County Road 26, south of Sycamore Road in Knox County, where it damaged a large outbuilding and tree limbs. The tornado tracked east-northeastward, caused sporadic tree damage, and removed shingles and siding from residences along Garber Road before crossing Possum Street. Beyond Possum Street, the tornado continued to move east-northeastward, caused minor roof and siding damage to two residences, and an outbuilding sustained garage door damage. The same outbuilding had a portion of its roof torn-off and displaced roughly 100 yards into nearby trees to the east. As the tornado continued to move east-northeastward, it caused additional, sporadic tree damage south of Sycamore Road before the tornado ended near the intersection of Sycamore and Granville Roads in Brandon.
Multiple trees downed and minor damage to barn along Grove Church Road, between Lee Wolfe Road and OH Route 229, about three-miles southeast of Gambier.
Numerous roads will water flowing over them in Mount Vernon, Gambier, and eastern portions of Knox County. Radar estimated 2 to 2.75 inches of rainfall in a 90-120 minute period.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2024Every state in 2024This day in weather historyThe tornado archive for Ohio, 2024Warnings in Ohio, June 2024
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: 1199652, 1198376, 1198377, 1199658.