During the day on September 24th, an area of low pressure moved across the lower Great Lakes region. A cold front extending to the south of the surface low moved across the Ohio Valley during the afternoon and evening hours on the 24th.
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 LMK wrote it up.
During the day on September 24th, an area of low pressure moved across the lower Great Lakes region. A cold front extending to the south of the surface low moved across the Ohio Valley during the afternoon and evening hours on the 24th. Along and ahead of the cold front, surface temperatures warmed into the upper 70s and low 80s with dewpoint temperatures rising into the upper 60s, providing sufficient instability for thunderstorms to develop. A dominant cluster of thunderstorms formed just north of the Ohio River during the early afternoon hours, producing scattered wind damage on both sides of the river. An EF0 tornado also formed within this area of severe thunderstorms, moving across southern Clark County and producing minor damage. By mid-to-late afternoon, the cold front pushed through southern Indiana, bringing an end to the severe weather risk.
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 Louisville, KY wrote its last area forecast discussion before the first event at Sep 24, 9:17 AM EST, 3 hours 1 minute earlier. Its key messages:
Area Forecast Discussion National Weather Service Louisville KY 1017 AM EDT Tue Sep 24 2024 .KEY MESSAGES... * Strong to severe storms possible today, especially in the afternoon and early evening. Gusty winds will be the main severe threat, with hail a secondary threat. A brief tornado is also a non-zero threat. * Drought-easing rainfall in the forecast as the remnants of a tropical system move into the region Friday. Stay tuned to latest updates from NHC on the forecast path/strength of this system. && .UPDATE... Issued at 1016 AM EDT Tue Sep 24 2024 The morning round of showers and storms continues to weaken and push in to eastern Kentucky. Breaks in the overcast are still prevalent over the western half of Kentucky, and will allow for some destabilization to occur. Redevelopment of scattered showers and storms will take place this afternoon in a corridor of 1.50-1.75" precipitable waters and enough bulk shear for storm organization ahead of an approaching surface cold front and 5H shortwave trough. Some widely scattered redevelopment has already begun to take place over southern Illinois, western Kentucky, and southwest Indiana. Coverage will increase as we go into the afternoon hours. CAPE on sounding progs is narrow and mid level lapse rates will remain weak, but there's enough moisture, shear, and destabilization expected to support strong to severe storms this afternoon into early this evening. The best timing for the peak of the event appears to be roughly from 2pm to 5pm EDT. Locally gusty winds remain the greatest threat with the stronger storms, with straight hodo traces and a slight uptick in DCAPE expected. Freezing levels are high and the column is moist (especially in mid and lower levels), but some marginally severe hail could still be produced by the strongest updrafts, especially in any lone cells that don't have much competition from neighbors. && .SHORT TERM /THROUGH TONIGHT/... Issued at 258 AM EDT Tue Sep 24 2024 Rounds of showers and thunderstorms expected today as a shortwave trough digs into the area, and a surface low gradually deepens across Indiana and the lower Great Lakes. There is a lead shortwave embedded within this larger trough that is currently responsible for driving a convective cluster mainly across southern IN at this hour. The overall environment that these storms are currently in isn't that bad given 40 knots of deep layer shear, and around 1000 J/KG of MUCAPE. So, do expect these storms to maintain through the morning hours, and wouldn't be surprised to see a few stronger radar signatures. Biggest limiting factor to anything severe is the notable near-surface inversion around 925 mb. This inversion is evident on forecast soundings, and observed AMDAR soundings early this morning. As a result, think this stable layer will mostly limit any stronger gusts from getting all the way down to the surface. Nevertheless will continue to monitor through the morning hours. Once this lead shortwave passes, do expect a short lull in activity as we remain in the subsident wake, and we haven't had a chance to destabilize yet. As a result, looking for a fairly quiet window from around sunrise through mid to late morning. By midday into the afternoon, the main shortwave trough axis approaches with the surface low down around 1006-1007 mb over northern Indiana. The cold front trailing from this surface low will be poised to push through our area fairly quickly this afternoon into evening with scattered storms firing ahead of the front thanks to modest instability (1000- 1750 J/KG of MLCAPE), increasing forcing beneath the exit region of an intensifying upper jet, and moisture transport on a subtle low level jet. Overall, this setup could favor a few supercell structures given the exit region of the upper jet, and a fairly strong speed shear profile. The overall hodograph features mostly unidirectional shear, so the main threat should be damaging wind. That being said, can't rule out a low end tornado threat should any localized surface winds become a bit more backed, and the low level hodograph becomes more looped. Like the addition of the 2% Tornado probs with this Day 1 Outlook. Did want to point out that although overall instability is fairly weak, and it may be somewhat hard to destabilize given cloud cover today, there is a good amount of forcing that could offset the weaker overall instability. As a result, do think we'll get some strong updrafts. The Slight Risk looks good and happy with the expansion of it as well. Not much changes to the expected timing of the severe threat. 1 PM to around 7 or 8 PM looks reasonable at this time. The cold front only looks to make to around the I-75 corridor by tonight, and then will likely stall. This should shut most of our precipitation off from W to E as it does so, however will likely have to keep some lingering shower and storm chances across our east into the overnight. && .LONG TERM /WEDNESDAY THROUGH MONDAY/... Issued at 258 AM EDT Tue Sep 24 2024 Wednesday... The weather continues to look fairly active in terms of precipitation chances from midweek into the weekend. Wednesday is shaping up to be one of the quieter days, though still not rain- free. A closed upper low is forecast to spin southeast over SE Missouri on Wednesday, with a strengthening southerly ULJ over the TN Valley. A sfc cold front will begin the day draped roughly from Middle TN through east-central KY, with a plume of deep moisture (PW values > 1.6 inches) now east of the forecast area. The weak boundary will make slow progress through eastern portions of KY/TN. The increasing southerly winds aloft do draw slightly higher moisture content northward into the region with PW values near 1.4 inches along the I-75 corridor. PW values taper off to 1.2-1.3 inches further north and west. Skies look to remain mostly cloudy, with the exception of brief, partial clearing west of I-65. The cloud cover will limit surface heating, with afternoon highs only in the mid/upper 70s. Scattered shower activity looks possible, especially across the Bluegrass and Lake Cumberland regions. A few storms will also be possible near I- 75, but fairly weak in nature. QPF for the daytime period is light, only around a tenth of an inch or less on average. And the western half of the forecast area is likely to stay dry. Meanwhile, PTC Nine (currently named) is forecast to move north into the southeastern Gulf of Mexico by evening while strengthening to hurricane strength. Wednesday night - Thursday night... An upper level ridge of high pressure will drift slightly further east off the Southeastern US coast Wed into Wed night. The closed upper low just to our west is forecast to wobble westward over the Ozarks heading into Thu. All of the above allows PTC Nine to accelerate NNE over the eastern Gulf as a hurricane Wed night into Thursday. Locally, we will see increasing diffluence aloft and strengthening southerly to southeasterly winds through a deep layer. The strengthening southeasterly flow will provide increased forcing for ascent and moisture transport into the region. With even the potential for a lingering stalled boundary/inverted sfc trough draped somewhere through KY/TN, the synoptic setup suggests a predecessor rainfall event (PRE) is likely extending poleward from the tropical system. This would enhance rainfall totals through the Southeast and potentially into portions of eastern and central KY. Areas further south, such as GA and eastern TN, are likely to see higher rainfall amounts. However, we'll need to retain elevated PoPs in the forecast well ahead of the arrival of the tropical system. Periods of scattered to numerous showers, moderate to heavy at times, will be possible during this time frame. Friday through the Weekend... The weakening tropical storm is forecast by NHC to arrive in KY as a tropical depression Friday evening. The system will then continue to weaken over the weekend, while possibly pinwheeling to the northwest around the remnant upper low and making the extratropical transition. Expect likely rain showers on Friday along with windy conditions. Cannot rule out at least a low-end severe threat given the wind fields surrounding the tropical depression, but this will largely depend on the east-west placement of the low when it traverses the Lower Ohio Valley. There is still some meaningful spread in the low track at this time range. Scattered showers will remain possible over the weekend, with details dependent on the evolution of the closed low pressure system. Total QPF (including rain in the Short Term) of 2-4+ inches is expected through the weekend. Some locally enhanced totals will be possible given the convective/tropical nature of the rain at times. Overall, this rain will be hugely beneficial given the ongoing drought. However, locally enhanced training would boost a short- fused flash flood threat. The risk for widespread, long-fused flooding is low. But given the unsettled pattern in place, instances of minor/nuisance flooding may become more common by the end of the week with tropical remnants moving through. && .AVIATION /12Z TAFS THROUGH 18Z WEDNESDAY/... Issued at 643 AM EDT Tue Sep 24 2024 A messy forecast for today as an area of low pressure moves just to the north of the TAF sites, and rounds of showers and storms accompany it. The first complex will be exiting BWG/LEX/RGA over the next few hours. Some lingering low ceilings (MVFR or IFR) are still expected through the morning hours at either HNB or SDF at times, albeit hit or miss. However, improvement back to VFR is expected as the morning progresses. As we move toward midday and through the afternoon hours, scattered thunderstorms, some strong, are expected to develop ahead of a cold front and strong upper disturbance. Have included mention of t- storms with a Prob30 for the best expected time range. Conditions improve with winds starting to veer as cold frontal passage begins toward the end of this forecast window. Low ceilings are expected to set back into the region toward dawn on Wednesday. && .LMK WATCHES/WARNINGS/ADVISORIES... KY...None. IN...None. && UPDATE...13 SHORT TERM...BJS LONG TERM...EBW AVIATION...BJS
Hazardous Weather Outlook National Weather Service Louisville KY 1100 AM EDT Tue Sep 24 2024 INZ076>079-083-084-089>092-KYZ023>043-045>049-053>057-061>067- 070>078-081-082-251500- Orange-Washington IN-Scott IN-Jefferson IN-Dubois-Crawford-Perry- Harrison IN-Floyd-Clark IN-Hancock-Breckinridge-Meade-Ohio-Grayson- Hardin-Bullitt-Jefferson-Oldham-Trimble-Henry-Shelby-Franklin- Scott KY-Harrison KY-Spencer-Anderson-Woodford-Fayette-Bourbon- Nicholas-Nelson-Washington KY-Mercer-Jessamine-Clark KY-Larue-Marion- Boyle-Garrard-Madison-Butler-Edmonson-Hart-Green-Taylor-Casey- Lincoln-Logan-Warren-Simpson-Allen-Barren-Monroe-Metcalfe-Adair- Russell-Cumberland-Clinton- 1100 AM EDT Tue Sep 24 2024 /1000 AM CDT Tue Sep 24 2024/ This Hazardous Weather Outlook is for portions of southern Indiana and central Kentucky. .DAY ONE...This afternoon and tonight. Scattered thunderstorms are expected this afternoon into early evening as a cold front approaches the region. Gusty, potentially damaging winds are the primary severe threat, with marginally severe hail (around an inch in diameter) being a secondary threat. A brief tornado cannot be ruled out. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. Monitor the latest forecasts as the remnants of a tropical system could impact our area by late week into the weekend. Heavy rains and gusty winds will be the main impacts Friday, with localized flooding possible. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon and evening. GENERAL STORM MOTION OF THE DAY: Storms will generally move towards the northeast around 30 to 40 mph. Any users of this storm motion must be aware that thunderstorm activity can be erratic and constantly evolving. Please use this with caution and be prepared for changing conditions. && More information, along with other weather, hydrological and climate information can be found, at weather.gov/louisville. 13
Special Weather Statement
National Weather Service Louisville KY
1005 AM CDT Tue Sep 24 2024
KYZ061-070-241530-
Logan KY-Butler KY-
1005 AM CDT Tue Sep 24 2024
...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN LOGAN AND WESTERN
BUTLER COUNTIES THROUGH 1030 AM CDT...
At 1004 AM CDT, Doppler radar was tracking a strong thunderstorm near
Dunmor, moving east at 45 mph.
HAZARD...Wind gusts up to 50 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...
Morgantown, Anderson, Lewisburg, Rochester, Huntsville, Mining City,
Spa, Dimple, Leetown, and Wolf Lick.
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.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3706 8705 3707 8698 3707 8694 3709 8690
3710 8690 3711 8689 3713 8690 3713 8691
3714 8693 3718 8692 3718 8689 3719 8691
3721 8691 3722 8689 3725 8687 3731 8673
3711 8663 3703 8666 3695 8706
TIME...MOT...LOC 1504Z 249DEG 39KT 3705 8709
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...50 MPH
CSGSpecial Weather Statement
National Weather Service Louisville KY
1029 AM CDT Tue Sep 24 2024
KYZ027-061-062-071-241600-
Grayson KY-Warren KY-Edmonson KY-Butler KY-
1029 AM CDT Tue Sep 24 2024
...A STRONG THUNDERSTORM WILL IMPACT BUTLER...SOUTH CENTRAL
GRAYSON...NORTHWESTERN WARREN AND NORTHWESTERN EDMONSON COUNTIES
THROUGH 1100 AM CDT...
At 1029 AM CDT, Doppler radar was tracking a strong thunderstorm near
Morgantown, moving east at 45 mph.
HAZARD...Wind gusts up to 50 mph and nickel 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...
Morgantown, Casey, Lee, Rochester, Woodbury, Monford, Roundhill,
Huntsville, Mining City, and Dimple.
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.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3722 8689 3742 8643 3714 8629 3705 8683
3706 8683 3718 8690 3719 8689 3719 8690
3720 8691 3721 8691
TIME...MOT...LOC 1529Z 248DEG 40KT 3716 8678
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH
CSGSpecial Weather Statement
National Weather Service Louisville KY
1057 AM CDT Tue Sep 24 2024
KYZ027-061-062-241615-
Grayson KY-Edmonson KY-Butler KY-
1057 AM CDT Tue Sep 24 2024
...A STRONG THUNDERSTORM WILL IMPACT NORTHEASTERN BUTLER...SOUTH
CENTRAL GRAYSON AND NORTHERN EDMONSON COUNTIES THROUGH 1115 AM CDT...
At 1056 AM CDT, Doppler radar was tracking a strong thunderstorm 12
miles northwest of Brownsville, moving east at 45 mph.
HAZARD...Wind gusts up to 40 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Leitchfield, Lee, Windyville, Roundhill, Black Gold, Broadway,
Peonia, Sadler, Nash, and Sunfish.
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.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3749 8623 3735 8615 3735 8616 3733 8616
3731 8613 3725 8610 3718 8648 3734 8655
TIME...MOT...LOC 1556Z 248DEG 40KT 3730 8643
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...40 MPH
CSGSpecial Weather Statement
National Weather Service Louisville KY
1213 PM EDT Tue Sep 24 2024
KYZ027-028-053-062-063-241645-
Hart KY-Grayson KY-Edmonson KY-Larue KY-Hardin KY-
1213 PM EDT Tue Sep 24 2024
...A STRONG THUNDERSTORM WILL IMPACT SOUTHWESTERN LARUE...NORTHERN
HART...SOUTHEASTERN GRAYSON...SOUTHEASTERN HARDIN AND NORTHEASTERN
EDMONSON COUNTIES THROUGH 1245 PM EDT/1145 AM CDT/...
At 1212 PM EDT/1112 AM CDT/, Doppler radar was tracking a strong
thunderstorm 9 miles southeast of Leitchfield, moving east northeast
at 45 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...
Elizabethtown, Hodgenville, Upton, Sonora, Bonnieville, Boundary Oak,
Rock Creek, Cub Run, Broad Ford, and Peonia.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 3724 8629 3743 8632 3769 8584 3758 8565
3740 8567
TIME...MOT...LOC 1612Z 243DEG 41KT 3736 8621
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
RJSSpecial Weather Statement
National Weather Service Louisville KY
1237 PM EDT Tue Sep 24 2024
KYZ028-045-053-054-063-241715-
Hart KY-Marion KY-Nelson KY-Larue KY-Hardin KY-
1237 PM EDT Tue Sep 24 2024
...STRONG THUNDERSTORMS WILL IMPACT SOUTHWESTERN NELSON...LARUE...
NORTHWESTERN MARION...NORTHEASTERN HART AND SOUTHEASTERN HARDIN
COUNTIES THROUGH 115 PM EDT/1215 PM CDT/...
At 1237 PM EDT/1137 AM CDT/, Doppler radar was tracking strong
thunderstorms along a line extending from 13 miles southwest of
Elizabethtown to 13 miles southwest of Hodgenville to 7 miles
northwest of Munfordville. Movement was east at 40 mph.
HAZARD...Wind gusts up to 50 mph and half inch 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...
Elizabethtown, Hodgenville, New Haven, Loretto, Upton, Sonora,
Bonnieville, Raywick, Boundary Oak, and Dant.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with these storms.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3744 8598 3756 8606 3782 8559 3764 8539
3749 8542 3747 8549 3748 8550 3746 8555
3747 8558 3746 8561 3747 8563 3743 8566
3733 8602
TIME...MOT...LOC 1637Z 248DEG 36KT 3754 8599 3746 8594 3737 8597
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
RJSSpecial Weather Statement
National Weather Service Louisville KY
1254 PM EDT Tue Sep 24 2024
INZ084-090-KYZ025-241730-
Crawford IN-Harrison IN-Meade KY-
1254 PM EDT Tue Sep 24 2024
...A STRONG THUNDERSTORM WILL IMPACT CENTRAL HARRISON...SOUTHEASTERN
CRAWFORD AND NORTH CENTRAL MEADE COUNTIES THROUGH 130 PM EDT...
At 1253 PM EDT, Doppler radar was tracking a strong thunderstorm near
Carefree Town, moving east at 25 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...
Corydon, Lanesville, Leavenworth, Crandall, New Middletown, Moberly,
Byrneville, White Cloud, Bradford, and Fairdale.
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.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3834 8603 3833 8603 3820 8596 3819 8596
3819 8595 3815 8593 3811 8634 3821 8640
3839 8606
TIME...MOT...LOC 1653Z 247DEG 23KT 3817 8630
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
CSGThe Louisville radar (KLVX), 40 km away, was scanning. The volume nearest the first event began at 17:18 UTC.
2 thunderstorm wind, 1 tornado. Local standard time, as filed.
A power outage was caused by damage to lines. This resulted in traffic lights not working at the intersection of U.S. Route 150 and Paoli Pike.
A few trees were blown down in Floyds Knobs.
A National Weather Service damage survey team confirmed an EF0 tornado tracked between Clarksville and Sellersburg in southern Clark County. The tornado touched down just northeast of the intersection of Interstate 65 and Interstate 265. The majority of the damage was in the Silver Lake Trailer Park. Trees were uprooted and topped, hitting two different mobile homes; the trees were facing from the north to the|northeast. There were nine power poles and seven cross members heavily|damaged. The foundations of some of the mobile homes had shifted as a result of the tornado. Tornado wind speeds were estimated to be 80 miles per hour, with a width of up to 100 yards.
A railroad arm at Apple Leaf Lane and U.S. Route 31 was bent significantly.|The tornado damaged a couple of trees in fields as it moved to the|northeast towards Charlestown Pike. Near the Prather Schoolhouse and Ladies Union Club on Charlestown Pike, there were several trees twisted and topped. Tornado wind speeds were estimated to be 75 miles per hour, with a width of up to 50 yards. The|tornado lifted just northeast of Charlestown Pike.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2024Every state in 2024This day in weather historyThe tornado archive for Indiana, 2024Warnings in Indiana, September 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: 1215494, 1215495, 1215498.