Scattered thunderstorms developed during the late afternoon and evening hours ahead of a cold front approaching the Ohio Valley Region.
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 ILN wrote it up.
Scattered thunderstorms developed during the late afternoon and evening hours ahead of a cold front approaching the Ohio Valley Region.
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 Wilmington, OH wrote its last area forecast discussion before the first event at Jun 12, 3:03 PM EST, 1 hour 23 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Wilmington OH 403 PM EDT Sat Jun 12 2021 .SYNOPSIS... A weak cold front will pass across the region late tonight into Sunday. A second cold front will move through Monday afternoon and evening. Cooler and drier air will then work in for mid week. && .NEAR TERM /UNTIL 6 AM SUNDAY MORNING/... Scattered showers and thunderstorms across southern counties will diminish with the loss of heating. Additional showers and thunderstorms that have developed to the west closer to a weak cold front will be able to sustain longer into the evening. Thus expect them to move into the northwest counties. But they should be on a diminishing trend. It is not clear whether precipitation will completely dissipate as the front makes its way into the area. Thus have maintained low chance PoPs near the forecast boundary position. It will be another warm and muggy night with lows in the upper 60s to around 70. && .SHORT TERM /6 AM SUNDAY MORNING THROUGH SUNDAY NIGHT/... Weak front bisecting the area will continue slowly southeast through the day. Atmosphere will be unstable and expect showers and thunderstorms to develop and increase in coverage during the late morning and early afternoon. This activity will push out of the area before the day is through. Given forecast instability, cannot rule out a few strong to severe storms. With the front moving through along with clouds and precipitation, expect highs to be a little lower with readings in the mid 80s. In the wake of the front, some ridging will work in which will allow skies to clear. Lows will fall back into the upper 50s to lower 60s. && .LONG TERM /MONDAY THROUGH SATURDAY/... Upper level troughing will begin settling into the Ohio Valley from the northeast on Monday as a secondary cold front and weak surface low sweep in from the north Monday afternoon. Showers and thunderstorms are possible ahead of the front due to low level convergence along the front, afternoon destabilization, and DCVA associated with an upper level shortwave arriving with the surface front. Winds shift from the west to the northwest by Monday evening behind the front bringing cooler and drier air to the region. Forecast highs are in the middle 80s and forecast lows Monday night are in the upper 50s. Upper level troughing amplifies over the Ohio Valley Tuesday through Wednesday. Simultaneously, surface high pressure builds in from the northwest. Fair weather will result with highs near 80 and lows in the 50s under light northerly flow. Temperatures start moderating on Thursday when surface high pressure nudges east and upper level heights begin to rise. Developing southerly flow raises highs into the lower 80s. The pleasant surface high fully shifts east out of the area on Friday and the next cold front may start approaching from the northwest. This results in chances for rain by the end of the work week. && .AVIATION /20Z SATURDAY THROUGH THURSDAY/... VFR conditions will occur at the terminals through the early part of the period with some cumulus which will likely diminish towards 00Z. Scattered showers and thunderstorms will move in from the northwest after 00Z although on a weakening trend. There is enough of a chance to include VCTS at KDAY and VCSH at KILN and KCMH/KLCK. This precipitation will occur ahead of a weak front that will move across the region after 06Z. There is at least a low potential for some additional showers with the boundary. Fog development, mainly ahead of the boundary in the very moist airmass, is uncertain because it is not clear how much cloud cover will occur. For now, have gone with a persistence forecast at KLUK where reduced visibilities are most likely. Looks like there is a window for lower visibilities at KILN as well. But there is potential for fog to be more extensive than what is currently reflected in the TAFs. VFR will be prevalent late in the period with winds becoming northwest at less than 10 kt in the wake of the front. .OUTLOOK...No significant weather expected. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS... NEAR TERM... SHORT TERM... LONG TERM...Campbell AVIATION...
Hazardous Weather Outlook National Weather Service Wilmington OH 1047 AM EDT Sat Jun 12 2021 INZ050-058-059-066-073>075-080-KYZ089>093-OHZ026-034-035-042>046- 051>056-060>065-070>074-077-078-080-130845- Wayne-Fayette IN-Union IN-Franklin IN-Ripley-Dearborn-Ohio- Switzerland-Carroll-Gallatin-Boone-Kenton-Campbell-Hardin-Mercer- Auglaize-Darke-Shelby-Logan-Union OH-Delaware-Miami-Champaign-Clark- Madison-Franklin OH-Licking-Preble-Montgomery-Greene-Fayette OH- Pickaway-Fairfield-Butler-Warren-Clinton-Ross-Hocking-Hamilton- Clermont-Highland- 1047 AM EDT Sat Jun 12 2021 This Hazardous Weather Outlook is for East Central Indiana, Southeast Indiana, Northern Kentucky, Central Ohio, South Central Ohio, Southwest Ohio and West Central Ohio. .DAY ONE...Today and tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Sunday through Friday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. KYZ094>100-OHZ079-081-082-088-130845- Owen-Grant-Pendleton-Bracken-Robertson-Mason-Lewis-Brown-Adams-Pike- Scioto- 1047 AM EDT Sat Jun 12 2021 This Hazardous Weather Outlook is for Northeast Kentucky, Northern Kentucky, South Central Ohio and Southwest Ohio. .DAY ONE...Today and tonight. There is a low probability for widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Scattered showers and thunderstorms are expected Sunday into middle afternoon. A few of the storms could become strong to severe, with damaging winds and large hail being the main threats. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Wilmington OH
149 PM EDT Sat Jun 12 2021
KYZ098>100-121815-
Robertson KY-Mason KY-Lewis KY-
149 PM EDT Sat Jun 12 2021
...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN MASON...ROBERTSON AND
NORTHWESTERN LEWIS COUNTIES UNTIL 215 PM EDT...
At 148 PM EDT, radar indicated a strong thunderstorm near Tollesboro,
moving south at 15 mph.
STORM HAZARDS INCLUDE...
Winds to 35 mph...
Pea size hail...
Frequent cloud-to-ground lightning...
Very heavy rain...
Locations impacted include...
Maysville, Washington, Lewisburg, Tollesboro, Sardis, Blue Licks
Battlefield, Murphysville, Burika, Mount Gilead, Alhambra, Mays Lick,
Rectorville, Epworth, Ribolt, Peed, Fleming-Mason Airport,
Orangeburg, Helena, Glen Springs and Somo.
Do not stay in the open or seek shelter under trees when lightning
threatens. Move indoors when a thunderstorm approaches.
Water will pond on roads and may quickly fill roadside ditches and
small streams.
To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.
LAT...LON 3844 8400 3844 8401 3854 8398 3864 8377
3863 8376 3864 8371 3863 8366 3866 8364
3869 8352 3850 8344 3848 8358 3851 8361
3851 8363 3852 8363 3852 8365 3846 8386
3849 8393 3845 8398 3842 8400
TIME...MOT...LOC 1748Z 352DEG 15KT 3861 8363
ConiglioSpecial Weather Statement
National Weather Service Wilmington OH
356 PM EDT Sat Jun 12 2021
KYZ094>096-122030-
Pendleton KY-Owen KY-Grant KY-
356 PM EDT Sat Jun 12 2021
...A STRONG THUNDERSTORM WILL AFFECT GRANT...SOUTHEASTERN OWEN AND
SOUTHWESTERN PENDLETON COUNTIES UNTIL 430 PM EDT...
At 356 PM EDT, radar indicated a strong thunderstorm over
Williamstown, moving south at 20 mph.
STORM HAZARDS INCLUDE...
Winds to 45 mph...
One half inch diameter hail...
Frequent cloud-to-ground lightning...
Very heavy rain...
Locations impacted include...
Williamstown, Dry Ridge, Corinth, Stewartsville, Elk Lake, Beechwood,
Harmony, Cherry Grove, Northcutt, Williamstown Lake, Natlee,
Knoxville, Twin Bridges, Keefer, Camp Northward, Needmore, New
Columbus, Holbrook, Lawrenceville and Cordova.
This includes I-75 in Kentucky between mile markers 144 and 160.
Do not stay in the open or seek shelter under trees when lightning
threatens. Move indoors when a thunderstorm approaches.
Water will pond on roads and may quickly fill roadside ditches and
small streams.
To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.
LAT...LON 3835 8482 3865 8477 3876 8450 3854 8446
3854 8448 3851 8449 3851 8452 3849 8456
3835 8474 3834 8479
TIME...MOT...LOC 1956Z 353DEG 16KT 3864 8457
ConiglioSpecial Weather Statement
National Weather Service Wilmington OH
451 PM EDT Sat Jun 12 2021
INZ066-073-122115-
Franklin IN-Ripley IN-
451 PM EDT Sat Jun 12 2021
...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN FRANKLIN AND
NORTHERN RIPLEY COUNTIES UNTIL 515 PM EDT...
At 451 PM EDT, radar indicated a strong thunderstorm near Lake
Santee, moving south at 20 mph.
STORM HAZARDS INCLUDE...
Winds to 45 mph...
One half inch diameter hail...
Frequent cloud-to-ground lightning...
Very heavy rain...
Locations impacted include...
Batesville, Versailles, Osgood, Oldenburg, Lake Santee, Holton,
Napoleon, Versailles Lake, Otter Village, Huntersville, Hamburg and
Ballstown.
This includes I-74 in Indiana between mile markers 145 and 152.
Do not stay in the open or seek shelter under trees when lightning
threatens. Move indoors when a thunderstorm approaches.
Water will pond on roads and may quickly fill roadside ditches and
small streams.
To report hazardous weather conditions, go to our website at
weather.gov/iln and submit your report via social media, when you can
do so safely.
LAT...LON 3919 8544 3927 8530 3941 8530 3942 8521
3919 8513 3906 8526 3909 8544
TIME...MOT...LOC 2051Z 353DEG 17KT 3935 8530
ConiglioThe Indianapolis radar (KIND), 100 km away, was scanning. The volume nearest the first event began at 21:29 UTC.
5 thunderstorm wind, 3 flash flood, 1 flood, 1 hail. Local standard time, as filed.
A power pole and wires were downed.
Several large limbs were downed just north of Jac-Cen-Del School.
Several inches of water were flowing across U.S. Route 421 in Napoleon.
High water was flowing over Old Michigan Road.
High water was reported on numerous roads between Napoleon and Osgood.
A few trees were downed on County Road 350 S.
A few trees and power lines were downed near W County Road 480 S and State Route 121.
Several trees were downed.
Numerous roads were closed due to water flowing across them. These included State Route 121, Columbia Road, Flat Ridge Bridge, Ott Road and Laurel Road.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2021Every state in 2021This day in weather historyWarnings in Indiana, June 2021
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: 953856, 953857, 953853, 953852, 953855, 953860, 953858, 953859, 953861, 953854.