Showers and thunderstorms produced locally heavy rainfall ahead of an approaching cold front.
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.
Showers and thunderstorms produced locally heavy rainfall ahead of an approaching cold front.
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 Sep 15, 12:08 AM EST, 1 hour 52 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Wilmington OH 108 AM EDT Wed Sep 15 2021 .SYNOPSIS... A cold front will settle southeast through the Ohio Valley tonight and Wednesday. This front will bring a chance of showers and storms areawide as it moves through. While brief cooling will occur behind the front on Thursday, above normal temperatures will return by Friday and into the weekend as the front lifts back north of the area and warm, moist southerly winds take back over. && .NEAR TERM /UNTIL 6 AM THIS MORNING/... Thunderstorms are pushing into northwestern portions of the region in advance of a frontal boundary. A few strong storms will be possible and cannot rule out a severe storm or two during the overnight time frame, however in general expect a weakening trend in the severe threat. There is some instability throughout the overnight hours and therefore keep at least some thunder mention in the forecast. Low temperatures overnight are expected to drop down into the 60s across the region. Temperatures will be a little cooler across northwestern portions of the region where the frontal boundary has moved through. && .SHORT TERM /6 AM THIS MORNING THROUGH 6 AM THURSDAY/... With the loss of instability and weaker forcing as the frontal boundary becomes a bit washed out, showers may become more scattered in nature in the 10-14z timeframe, with the frontal boundary expected to be draped roughly along the I-71 corridor. From mid-morning into mid afternoon, the return of diurnal instability will lead to an increase in precipitation coverage near and southeast of I-71, along with renewed intensity. Scattered strong storms are possible, along with an isolated severe storm in this area, fueled by DCAPE values approaching 1000 J/Kg especially in the 14-20z timeframe,then diminish as the frontal boundary sinks into southern Kentucky and West Virginia. Daytime highs in the mid to upper 70s, peaking near 80 in the southeast forecast area. In the wake of clearing behind the cold front on Wednesday night through all but the far southern forecast area, overnight lows will generally be in the mid 50s, with lower 60s closer to the Ohio river where clouds will linger. && .LONG TERM /THURSDAY THROUGH TUESDAY/... We will start off Thursday morning with a relatively dry airmass in place across our area as the cold front will have washed out off to our southeast. Moisture does try to increase a bit from the south through the afternoon but with the lack of much forcing, will try to keep a dry forecast across our far south for the afternoon hours. Highs on Thursday will be in the upper 70s to lower 80s. Weak mid level ridging will then be in place across the Ohio Valley Friday into Saturday. This should help keep us mainly dry, although as we destabilize through the afternoon hours, a few diurnally enhanced showers or thunderstorms will be possible. Will continue to keep pops generally in the slight chance category for the afternoon/evening hours. Temperatures will gradually modify with highs on Friday in the low to mid 80s and then mainly the mid 80s on Saturday. Mid level ridging will amplify over the upper Ohio Valley on Sunday before shifting off to the east Monday into Tuesday. Will maintain a dry forecast for Sunday and then allow for a low chance for diurnally enhanced showers/storms through the end of the period as some slightly better moisture begins to work its way in from the southwest. highs will be mostly in the mid 80s for Monday and Tuesday. && .AVIATION /05Z WEDNESDAY THROUGH SUNDAY/... A cold front is progressing southeastward through the area tonight. A weakening line of thunderstorms is being observed ahead the front. Storms have been observed containing brief outflow winds from the northwest winds at 10-15 knots with gusts upwards of 25 knots outside of overall southwesterly flow areawide. MVFR and IFR dropouts have also been observed in the strongest storms. Have accounted for the showers/storms in the TAFs overnight primarily with SHRA VCTS and VCSH. Shower and storms chances continue to gradually decrease overnight before reaching a minimum around 1200Z. Around 1200Z, the cold front starts arriving at the TAF sites leading to winds shifting out of the northwest around 10 knots. MVFR ceilings are moderately likely in the vicinity of the front from about 1300-1700Z. By 1800Z, the front should be southeast of the TAF sites allowing northwesterly winds to prevail with the return to VFR conditions. However, there is still an outside chance of a shower or storm during the early afternoon at KLUK, KCVG, KILN, KCMH, and KLCK. VFR conditions are likely to persist from the late afternoon through the early overnight before MVFR/IFR visibilities could develop late Wednesday night due to cooling temperatures and moisture left over from recent rainfall. OUTLOOK...No significant weather expected. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS...JDR NEAR TERM...Novak SHORT TERM...JDR LONG TERM...JGL AVIATION...Campbell
Hazardous Weather Outlook National Weather Service Wilmington OH 353 PM EDT Tue Sep 14 2021 INZ050-058-059-066-073-074-OHZ026-034-035-042>046-051>054-060>062- 070-071-077-152000- Wayne-Fayette IN-Union IN-Franklin IN-Ripley-Dearborn-Hardin-Mercer- Auglaize-Darke-Shelby-Logan-Union OH-Delaware-Miami-Champaign-Clark- Madison-Preble-Montgomery-Greene-Butler-Warren-Hamilton- 353 PM EDT Tue Sep 14 2021 This Hazardous Weather Outlook is for East Central Indiana, Southeast Indiana, Central Ohio, Southwest Ohio and West Central Ohio. .DAY ONE...This afternoon and tonight. Showers and a few storms are likely tonight. An isolated strong or severe storm will be possible with gusty or damaging winds being the primary threat. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. INZ075-080-KYZ089>100-OHZ055-056-063>065-072>074-078>082-088-152000- Ohio-Switzerland-Carroll-Gallatin-Boone-Kenton-Campbell-Owen-Grant- Pendleton-Bracken-Robertson-Mason-Lewis-Franklin OH-Licking- Fayette OH-Pickaway-Fairfield-Clinton-Ross-Hocking-Clermont-Brown- Highland-Adams-Pike-Scioto- 353 PM EDT Tue Sep 14 2021 This Hazardous Weather Outlook is for Southeast Indiana, Northeast Kentucky, Northern Kentucky, Central Ohio, South Central Ohio and Southwest Ohio. .DAY ONE...This afternoon and tonight. There is a low probability for widespread hazardous weather. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Showers and a few storms are likely Wednesday afternoon. An isolated strong or severe storm will be possible with gusty or damaging winds being the primary threat. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Wilmington OH
1127 PM EDT Tue Sep 14 2021
INZ050-058-150400-
Fayette IN-Wayne IN-
1127 PM EDT Tue Sep 14 2021
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF WAYNE AND
NORTHWESTERN FAYETTE COUNTIES THROUGH MIDNIGHT EDT...
At 1127 PM EDT, strong thunderstorms were located along a line
extending from near Fountain City to near Cambridge City to 8 miles
north of Rushville, moving east at 25 mph.
HAZARD...Wind gusts up to 45 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Richmond, Connersville, Centerville, Cambridge City, Hagerstown,
Fountain City, Dublin, Franklin, Abington, Greens Fork, East
Germantown, Spring Grove, Bethel, Economy, Boston, Mount Auburn,
Whitewater, Richmond Municipal Airport, Interstate 70 at Exit 145 and
Bentonville.
This includes I-70 in Indiana between mile markers 134 and 156.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a sturdy building.
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 3979 8530 3979 8522 3987 8522 3987 8520
4000 8520 4001 8484 4000 8481 3973 8482
3973 8504 3968 8529 3968 8530
TIME...MOT...LOC 0327Z 271DEG 20KT 3999 8494 3981 8510 3973 8546
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...45 MPH
NovakSpecial Weather Statement
National Weather Service Wilmington OH
1156 PM EDT Tue Sep 14 2021
INZ050-058-059-OHZ042-060-150430-
Fayette IN-Union IN-Wayne IN-Darke OH-Preble OH-
1156 PM EDT Tue Sep 14 2021
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF WAYNE, NORTHERN UNION
AND FAYETTE COUNTIES IN EAST CENTRAL INDIANA, NORTHWESTERN PREBLE AND
SOUTHWESTERN DARKE COUNTIES IN WEST CENTRAL OHIO THROUGH 1230 AM
EDT...
At 1155 PM EDT, strong thunderstorms were located along a line
extending from near Fountain City to near Connersville to near
Rushville, moving east at 35 mph.
HAZARD...Wind gusts up to 45 mph and very heavy rain.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Visibility will be poor and hydroplaning
is possible.
Locations impacted include...
Richmond, Connersville, Eaton, Centerville, Cambridge City, Liberty,
Hagerstown, New Paris, New Madison, Fountain City, Dublin, Glenwood,
Waterloo, Bunker Hill, Abington, Brownsville, Wayne Lakes, Eldorado,
West Manchester and Greens Fork.
This includes the following Interstates...
I-70 in Indiana between mile markers 134 and 156.
I-70 in Ohio between mile markers 0 and 12.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a sturdy building.
Motorists should slow down and use extra caution.
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 3979 8530 3979 8522 3987 8522 4000 8508
4000 8481 4002 8481 4004 8461 3990 8452
3970 8471 3960 8495 3958 8530
TIME...MOT...LOC 0355Z 269DEG 29KT 3993 8494 3972 8512 3961 8538
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...45 MPH
NovakSpecial Weather Statement
National Weather Service Wilmington OH
1248 AM EDT Wed Sep 15 2021
INZ058-059-066-150530-
Fayette IN-Union IN-Franklin IN-
1248 AM EDT Wed Sep 15 2021
...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF NORTHERN FRANKLIN
COUNTY IN SOUTHEASTERN INDIANA, UNION AND FAYETTE COUNTIES IN EAST
CENTRAL INDIANA THROUGH 130 AM EDT...
At 1248 AM EDT, a strong thunderstorm was located near Glenwood,
moving east at 30 mph.
HAZARD...Wind gusts up to 40 mph, frequent cloud-to-ground
lightning, and very heavy rain.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Lightning can cause serious injury or
death. Visibility will be poor and hydroplaning is
possible.
Locations impacted include...
Connersville, Brookville, Liberty, West College Corner, Glenwood,
Lake Santee, Salem, Waterloo, Blooming Grove, Columbia, Metamora,
Bunker Hill, Brownsville, Laurel, Dunlapsville, Whitewater State
Park, Goodwins Corner, Mounds State Recreation Area, Mettel Field and
Cottage Grove.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a sturdy building.
Motorists should slow down and use extra caution.
When thunder roars, go indoors! Do not stay in the open or seek
shelter under trees when lightning threatens.
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 3975 8530 3975 8518 3971 8518 3971 8504
3973 8503 3973 8482 3941 8482 3941 8530
TIME...MOT...LOC 0448Z 264DEG 24KT 3955 8531
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
KCThe national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
High water was reported on U.S. 40 in Pershing.
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, September 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: 973397.