Scattered thunderstorms developed as a low pressure system moved through the 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 as a low pressure system moved through the 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 Apr 17, 12:40 PM EST, 13 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Wilmington OH 140 PM EDT Wed Apr 17 2024 .SYNOPSIS... Showers and a few thunderstorms will be found over the region today ahead of a cold front crossing in the late day and early evening. Zonal westerly flow will be found behind the front until a surface low tracks through northern Ohio overnight Thursday, with a trailing cold front affecting the entire region. Building high pressure behind this second front will keep a cool pattern in the Ohio Valley through the weekend. && .NEAR TERM /UNTIL 8 PM THIS EVENING/... Looking at recent reflectivity data, storms being forced by the cold front are starting to pop in western Indiana/ southwestern Michigan. Satellite imagery depicts a wide dry slot moving into our region at the time of this writing. Anticipating that this insolation will help us destabilize a bit easier this afternoon; ACARS out of IND supports this thinking. 12Z CAMs suggest that this line will swing through our area during the mid afternoon hours extending through much of the CWA, however, the greatest severe threat still appears to be along and north of I-70 where forecast UH swaths gain intensity nearer to central and eastern Ohio. With the conditional severe threat, all hazards still remain on the table with MLCAPE of 1500+, effective bulk shear values 40-45 kts, steepening lapse rates, and subtle turning in the lowest levels. Any severe threat/ storms that do move through our region should have moved east by evening hours- this looks to primarily be an afternoon show. Outside of convection, gusty winds will move through the region with the stronger pressure gradient and cold frontal passage. For now, have highlighted this in the HWO. Finally, continued high PWATs and wet vertical profiles will result in effective rain rates, potentially leading to areas of isolated flooding. Previous discussion->There is a strong push from the models to limit any showers over the region to the northern CWA, where thunder will be at a peak from 19-23Z. Strong winds 15-25 mph with gusts to 30-35 mph will make for a breezy day. Day 1 outlook did not agree with the chance of precipitation as noted by surrounding forecast offices including ILN. Our forecast this morning looks overdone when compared to surrounding offices, but it felt too hasty for our area to be cut that much that early. Severe threat appears to be limited to CWA along and north of the I-70 corridor, probably a little more north than along. As per usual lately, model agreement is not so easy to come by. A few note a strong decrease in this afternoon's dewpoints, into the mid and lower 50s which would lead to little activity if realized. The negatively tilting trough crossing through northwest Ohio has been gaining some speed when compared to prior models. This suggests a very narrow corridor where dynamics /could/ come in play with an equally narrow corridor of moderate instability. This instability is primarily aloft and any lower based storms would need to punch through a fairly strong cap. Likewise, elevated storms that may develop will have a difficult time bringing the bulk of their energy to the surface, and the bulk of the energy available looks to be modest at best. All this being said, a slight chance of severe winds near 60 mph could accompany the strongest storms for a brief window of time this afternoon over the northern third of the CWA. Expect the trend will be to reduce even more the threat and footprint of storms as new models come in this morning. Highs today will be in the 70s with breezy conditions. && .SHORT TERM /8 PM THIS EVENING THROUGH 6 PM THURSDAY/... A cold front will have crossed most of the CWA by this time, but may still be located east of the Scioto River. Winds will have died down to a more manageable 8-12 mph overnight, more like 10-15 over the northern half. A surface ridge of high pressure will work into western CWA by daybreak. This will cut winds even more to the 5-10 mph category that should persist through the day as the high crosses to the east. With clearing sky cover, overnight lows will drop from the upper 40s in the northwest, low 50s for most of the CWA, and maybe only the mid 50s over parts of northern Kentucky and the lower Scioto Valley. Some increasing high clouds on Thursday will be found in the latter half of the day, particularly in the northwest. A lighter wind and abundant sunshine for most of the area will see highs reach the mid and upper 70s, some lower 70s in west central Ohio. && .LONG TERM /THURSDAY NIGHT THROUGH WEDNESDAY/... The long term period is going to start off on an active note as a midlevel S/W ejects E through the central/srn OH Vly within the quasi-zonal flow aloft. This will be the impetus that /finally/ brings a more concerted push of cooler/drier air back into the region, which will settle in this weekend through early next week. But before we get to the quieter weather for this weekend, it is worth noting that the signal for potential active weather has increased over the past day or so (particularly for the Tri- State and points further to the SW in KY). The reason for heightened concern stems from the fact that the front that will push through today/tonight (Wednesday/Wednesday night) will lose southward momentum late tonight, essentially stalling out just to our S and pivoting back to the N rather abruptly during the day Thursday as the S/W moves into the mid MS Rvr Vly. The lack of a stronger push of the front to the S means that the reservoir of LL moisture/warmth will be able to filter back in (to near/just N of the OH Rvr) by Thursday evening, and may do so rather easily. The trend in temp guidance upward for Thursday has been notable and points to at least some cause for concern as the S/W moves into the region Thursday evening/night. Ample forcing should spread W to E, with a pool of moderate SB-instby on the order of 1500-2000 J/kg (courtesy of sfc DPs in the lower 60s) residing immediately ahead of it near/SW of the Tri- State/N KY. While the attendant sfc low is not all that strong/deep, it will have plenty of mid/upper level support to promote broad- scale lift with the diffuse warm front able to make it to near I-70 by Thursday evening. Sufficient deep-layer (sfc-6km) shear on the order of 40kts should promote some storm organization, with indications for one or more bowing structures to track/ride to the ESE along the nosing instby gradient NE near the OH Rvr from Bloomington, IN to CVG. The best SB-instby should pinch off with north/eastward extent, but there is considerable uncertainty in just where this will occur. Of course, pattern recognition tells us that it is likely that the clusters/bowing segments of convection will take on more of a SE trajectory with time (tending to go toward the richer LL moisture to the S), perhaps only grazing the Tri-State of SE IN, SW OH, and N KY between about 02z-06z Friday, with additional (potentially slightly elevated) convection extending further N in EC IN and WC OH and the Miami Valley. The LL thermodynamic environment should be increasingly questionable closer to I-70 Thursday evening/night, lending doubt to the prospect of strong/severe storms this far north. However, should sufficient sfc-based destabilization occur immediately ahead of the convection, the greatest (conditional) threat with the activity near the Tri- State into N KY will undoubtedly be strong to damaging winds, especially in such a favorable (~1000J/kg) DCAPE environment. Of course, if the convection is able to grow upscale into a larger bowing segment, the potential for more widespread strong/severe wind gusts would evolve, likely focusing /just/ to the SW of the ILN FA in parts of NW/central KY late Thursday evening. Nevertheless, there is enough of a signal to add mention of strong to severe storms (with damaging wind gusts) for parts of the Tri-State late Thursday evening based on recent trends. This potential will likely reside in a rather small temporal and spatial capacity, but will add mention nonetheless. As we progress later into the night Thursday, there still should be SCT to numerous TSRA activity, although likely in a weakening trend with northward/eastward extent. Do think that most spots see /some/ pcpn Thursday evening/night, with the severe threat focusing near the Tri-State from about 02z-06z or so. The SHRA/TSRA activity will sweep through the remainder of the area late Thursday night into Friday morning, trend dry progressively from W to E between 12z-15z. Much cooler/drier air filters in from the NW in the post-frontal environment, with some sunshine likely to return for most spots by Friday afternoon as daytime highs generally range from the upper 50s to mid 60s. Several chilly nights are on tap each night Friday/Saturday/Sunday as very broad-scale troughing evolves for the OH Vly and points eastward this weekend. The coldest nights are likely to be Saturday night and Sunday night as temps dip into the mid to upper 30s. Some frost will be possible both of these nights, particularly near/N of the OH Rvr and in the typical sheltered locales. Expect that SHRA activity associated with the system darting across the TN Vly late Saturday into Sunday should stay S of the ILN FA, with dry conditions expected to prevail Friday morning through Monday. Daytime highs Saturday will generally be in the upper 50s, followed by lower 60s Sunday and mid 60s Monday. The next widespread chance for rain will arrive Monday night into Tuesday, with temps generally getting back close to, or above, normal by midweek next week. && .AVIATION /18Z WEDNESDAY THROUGH MONDAY/... A line of storms ahead of a cold front currently moving into northwest Ohio will continue eastward this afternoon. All site (except KCVG/KLUK) has a period of TSRA when storms are forecast to move through. For the two southern sites, confidence is lower that storms will reach that far south, so opted to keep TAFs cleaner for the time being. Outside of storms, CIGs have cleared up to a scattered deck of stratocu and will continue clearing through the evening hours. Strong southwesterly winds, gusting to 35 knots, shift to out of the west after frontal passage. Winds remain elevated through the afternoon but will decrease around sunset. Clouds continue to decrease into the overnight hours and VFR conditions should prevail into Thursday morning. Some hi-res guidance hints at patchy fog development in southwest Ohio/ northern Kentucky after winds die down, however, doesn't look to be widespread or dense, therefore have not included in TAFs. OUTLOOK...Showers and thunderstorms with MVFR CIGs/VSBYs are possible Thursday evening into Friday. Wind gusts around 30 knots are possible Friday. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS...Franks NEAR TERM...CA/Franks SHORT TERM...Franks LONG TERM...KC AVIATION...CA
Hazardous Weather Outlook National Weather Service Wilmington OH 1053 AM EDT Wed Apr 17 2024 KYZ097>100-OHZ078-079-081-088-181000- Bracken-Robertson-Mason-Lewis-Clermont-Brown-Adams-Scioto- 1053 AM EDT Wed Apr 17 2024 This Hazardous Weather Outlook is for northeast Kentucky, northern Kentucky, south central Ohio and southwest Ohio. .DAY ONE...This afternoon and tonight. Breezy south winds will gust to around 40 mph at times this afternoon. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. INZ066-073>075-080-KYZ089>096-OHZ077-181000- Franklin-Ripley-Dearborn-Ohio-Switzerland-Carroll-Gallatin-Boone- Kenton-Campbell-Owen-Grant-Pendleton-Hamilton- 1053 AM EDT Wed Apr 17 2024 This Hazardous Weather Outlook is for southeast Indiana, northern Kentucky and southwest Ohio. .DAY ONE...This afternoon and tonight. Breezy south winds will gust to around 40 mph at times this afternoon. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Another round of showers and storms is likely late Thursday evening. A few strong to severe storms will be possible, with gusty to damaging winds being the primary threat. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed late Thursday evening. INZ050-058-059-OHZ026-034-035-042>046-051>056-060>065-070>074-080- 082-181000- Wayne-Fayette-Union-Hardin-Mercer-Auglaize-Darke-Shelby-Logan- Delaware-Miami-Champaign-Clark-Madison-Franklin-Licking-Preble- Montgomery-Greene-Pickaway-Fairfield-Butler-Warren-Clinton-Ross- Hocking-Highland-Pike- 1053 AM EDT Wed Apr 17 2024 This Hazardous Weather Outlook is for east central Indiana, central Ohio, south central Ohio, southwest Ohio and west central Ohio. .DAY ONE...This afternoon and tonight. Scattered thunderstorms are expected to develop this afternoon. Some of these thunderstorms may be severe. Primary threats include strong/damaging winds and large hail. A tornado or two cannot be ruled out. Outside of the the thunderstorms, breezy south winds will gust to around 40 mph at times this afternoon. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. Areas of frost or patchy frost will be possible both Saturday night and Sunday night. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon.
Special Weather Statement
National Weather Service Wilmington OH
117 PM EDT Wed Apr 17 2024
OHZ034-171745-
Mercer OH-
117 PM EDT Wed Apr 17 2024
...STRONG THUNDERSTORMS WILL IMPACT PORTIONS OF MERCER COUNTY THROUGH
145 PM EDT...
At 117 PM EDT, strong thunderstorms were located along a line
extending from Monroe to 7 miles south of Portland, moving northeast
at 50 mph.
HAZARD...Wind gusts up to 40 mph and penny size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Hail may cause minor damage to
vegetation.
Locations impacted include...
Celina, Coldwater, St. Henry, Fort Recovery, Rockford, Wabash,
Mendon, Montezuma, Chattanooga, Neptune, Carthagena, and Tama.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a sturdy building.
A Tornado Watch remains in effect until 700 PM EDT for west central
Ohio.
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 4073 8446 4046 8446 4035 8480 4073 8480
TIME...MOT...LOC 1717Z 226DEG 41KT 4075 8490 4033 8495
MAX HAIL SIZE...0.75 IN
MAX WIND GUST...40 MPH
HatzosThe Northern Indiana radar (KIWX), 133 km away, was scanning. The volume nearest the first event began at 17:51 UTC.
24 hail, 8 thunderstorm wind, 2 tornado. Local standard time, as filed.
A peaked metal roof was blown off of a hog building.
A box truck was blown over.
Several large tree limbs were downed.
A tree was downed near the intersection of County Road 144 and Township Road 199.
The tornado began approximately 6 miles east of Urbana, Ohio north of US Highway 36 with the first visible sign of damage along Mutual Union Road. Minor roof damage was observed at one residence with nearly all trees in the surrounding location remaining intact. As the tornado continued northeast, outbuilding damage was observed on Yocom Road. The most concentrated area of damage occurred on Perry Road where multiple trees were uprooted and several outbuildings were damaged. The final location of damage was found on North Parkview Road where minor roof and tree damage was observed. The tornado likely dissipated east of this point.
Several large tree limbs were downed.
Multiple shingles were blown off of a residential roof.
The tornado quickly developed and likely reached the maximum intensity near the intersection of Fancher Road and State Route 605 South causing damage to a residence on the south side of Fancher Road. Multiple homes on the south side of Fancher Road had damage including blown out windows, garage door failures, and moderate roof material loss.
The tornado weakened as it crossed Fancher Road near Hatch Road and Kean Road, causing damage to trees in the area. The last known damage was found north of Fancher Road where an outbuilding lost most of its metal panels.
Multiple trees were downed.
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, April 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: 1163793, 1163792, 1163805, 1163747, 1163797, 1163775, 1163748, 1163794, 1163749, 1163750, 1163807, 1163801, 1163900, 1163756, 1163751, 1163752, 1163753, 1163755, 1163757, 1163758, 1163759, 1163760, 1163761, 1163762, 1163764, 1163763, 1163765, 1163766, 1163767, 1163768, 1163769, 1163770, 1163771, 1163806.