Scattered thunderstorms developed as a low pressure system moved through the Ohio Valley.
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 Ohio Valley.
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 Jul 24, 12:55 PM EST, 3 hours 47 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Wilmington OH 155 PM EDT Mon Jul 24 2023 .SYNOPSIS... Temperatures will be heating up this week. A mid level disturbance and weak surface low will generate showers and thunderstorms this afternoon and evening. While a few afternoon and evening storms cannot be ruled out later in the week, the next better chance of showers and thunderstorms will hold off Friday night and Saturday. && .NEAR TERM /UNTIL 6 AM TUESDAY MORNING/... Afternoon update following SPC Slight Risk 1630Z issuance... Much of the area is now under a level 2 of 5 risk for severe thunderstorms later this afternoon and into the evening hours. Regional satellite analysis shows earlier thunderstorm activity weakening with a suppressed cumulus field across much of southwestern / southern Ohio. Across the I-70 corridor, cumulus field is becoming more active as temperatures warm into the 80s. The combination of the heating, rich low level moisture, and 6.5C lapse rates aloft, yield SBCAPE between 2500-3000 J/kg area wide. Outside the earlier thunderstorm activity, DCAPE values are over 1000 J/kg, indicating the potential for enhanced thunderstorm downdrafts. The specific timing and spacial coverage of thunderstorms is still in question, however, confidence is increasing that much of the area will experience thunderstorms today. Surface convergence is increasing in western Ohio and east-central Indiana, suggesting this is where thunderstorms are first going to form between 2-4 pm. Ahead of an approaching shortwave, mean flow (850-300mb) is primarily westerly, with the tendency to become more northwesterly over the next few hours as the shortwave nears. Initial storm motions support movement from western Ohio into central Ohio with more organized thunderstorm advancing southeastward into southwest Ohio and southern Ohio. PoPs have been updated with this in mind. Primary severe hazards are large hail and damaging wind, but locally heavy rainfall is also a concern. While precipitable water values are not overly high, the large pool of instability over Indiana will provide the opportunity for multiple rounds of thunderstorms over the same areas. At this time, the greatest potential for this to occur is over portions of southeastern Indiana, southwest Ohio, and portions of northern Kentucky south of the tri-state. Thunderstorm activity gradually shifts south and east out of the area between midnight and 2 am. Calm winds and lingering low level moisture support fog development overnight, especially in the geographically foggier areas. && .SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/... Trough axis shifts east of the area for Tuesday, with the exiting shortwave providing thunderstorms chances to the east of the region. This setup results in less favorable conditions for showers and thunderstorms across the area, however, can't rule out a stray shower or thunderstorm late in the afternoon. Temperatures warm effectively into the mid and upper 80s setting the stage for warmer conditions later this week. && .LONG TERM /WEDNESDAY THROUGH MONDAY/... Big picture: expecting quite a pattern change through the period as the majority of the past few weeks has been dominated by large areas of low pressure centered in Canada, keeping much of the Midwest and eastern CONUS under northwesterly flow with normal to slightly below normal average temperatures. As we head into the extended period, a broad area of high pressure across the southern US pushes northeast toward the Ohio Valley region, allowing for height rises and a notable increase in heat/humidity with the hottest temperatures of the summer so far likely to arrive by week's end. Breaking it down a bit further... By Wednesday morning, the heat dome of high pressure continues to be located over the southwestern US. In the east, a persistent upper level trough stemming down from the Hudson Bay will still be in place, but with a shortwave digging through the larger flow. This shortwave will have an associated surface low pressure system near the Nebraska/ Iowa border. As the attendant surface boundary/ quasi warm front lifts north, the ILN CWA will end up in an area with south/southwesterly flow, which is marked by a notable increase in theta-e and PWATs (rising to between 1.8 to 2+ inches). This all translates to temperatures in the low 90s and dew points in the upper 60s/low 70s. Looking at this setup through a severe weather lens.. the more robust vertical wind field/best forcing aloft seems to be near northwestern Indiana and decay slightly as it travels to the Ohio Valley. However, it does appear a LLJ will be rounding the base of the shortwave and that areas of 30-35 kt sfc-500 bulk shear move into our western counties /sometime/ between Wednesday late afternoon/evening and Thursday early morning. Obviously, depending on time of day, this could certainly support organized convection. CAMs have not begun to really resolve this time frame yet... will be interested to see what kind of signal they produce, given the more forced convection (compared to what we've been experiencing). As the shortwave moves east of the region by Thursday, flow aloft becomes more zonal in nature with the area of high pressure to our southwest expanding northward into the Ohio Valley. Height rises with this shift will keep hot and sticky conditions in place for the remainder of the week and into the first half of the weekend. Heat index values are likely to rise into the upper 90s during the afternoons with muggy conditions. As the CWA sits on the northern periphery of the ridge, occasional shortwaves moving through the pattern will allow for continued chances for rounds of showers and storms, which will provide brief respites from the heat where rain falls. Looking near the end of the period, there are some hints that the larger pattern will begin to break up with an upper level trough to our north sagging southeastward and driving more northwesterly flow toward the Great Lakes region. && .AVIATION /18Z MONDAY THROUGH SATURDAY/... Confidence has increased in thunderstorm coverage this afternoon and evening so have added TEMPO groups at area TAF sites. Locally strong winds are expected in thunderstorm activity, with these details provided through amendments as confidence increases. Clearing skies and light winds and a moist environment will lead to fog development overnight. After morning fog clear, VFR restrictions are forecast with winds less than 10 knots. OUTLOOK...No significant weather expected. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS...AR NEAR TERM...McGinnis SHORT TERM...McGinnis LONG TERM...CA AVIATION...McGinnis
Hazardous Weather Outlook National Weather Service Wilmington OH 126 PM EDT Mon Jul 24 2023 INZ050-058-059-066-KYZ098-OHZ026-034-035-042>046-051>056-060>062-070- 251730- Wayne-Fayette IN-Union IN-Franklin IN-Robertson-Hardin-Mercer- Auglaize-Darke-Shelby-Logan-Union OH-Delaware-Miami-Champaign-Clark- Madison-Franklin OH-Licking-Preble-Montgomery-Greene-Butler- 126 PM EDT Mon Jul 24 2023 This Hazardous Weather Outlook is for East Central Indiana, Southeast Indiana, Northern Kentucky, Central Ohio, Southwest Ohio and West Central Ohio. .DAY ONE...This afternoon and tonight. Thunderstorms are expected this afternoon and into this evening. Some strong to severe storms are possible with damaging winds and large hail the primary threats. Where multiple rounds of thunderstorms occur, locally heavy rainfall may lead to a localized flash flooding. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. A few strong to severe storms are possible Wednesday night. The heat index will approach 100 on Wednesday, Thursday, and Friday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed. INZ073>075-080-KYZ089>097-099-100-OHZ063>065-071>074-077>082-088- 251730- Ripley-Dearborn-Ohio-Switzerland-Carroll-Gallatin-Boone-Kenton- Campbell-Owen-Grant-Pendleton-Bracken-Mason-Lewis-Fayette OH- Pickaway-Fairfield-Warren-Clinton-Ross-Hocking-Hamilton-Clermont- Brown-Highland-Adams-Pike-Scioto- 126 PM EDT Mon Jul 24 2023 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. Thunderstorms are expected this afternoon and into this evening. Some strong to severe storms are possible with damaging winds and large hail the primary threats. Where multiple rounds of thunderstorms occur, locally heavy rainfall may lead to a localized flash flooding. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. The heat index will approach 100 on Wednesday, Thursday, and Friday. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed.
Preliminary Local Storm Report
National Weather Service Wilmington OH
515 PM EDT Mon Jul 24 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0506 PM Hail 1 E Dayton 39.11N 84.44W
07/24/2023 E1.00 inch Hamilton OH Public
Report from mPING: Quarter (1.00 in.).
&&Preliminary Local Storm Report
National Weather Service Wilmington OH
527 PM EDT Mon Jul 24 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0520 PM Hail 1 NW Withamsville 39.07N 84.28W
07/24/2023 E0.70 inch Clermont OH Public
&&
JDRSpecial Weather Statement
National Weather Service Wilmington OH
528 PM EDT Mon Jul 24 2023
KYZ091>093-OHZ077-242200-
Boone KY-Kenton KY-Campbell KY-Hamilton OH-
528 PM EDT Mon Jul 24 2023
...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF NORTHERN KENTON,
NORTHERN CAMPBELL, NORTHERN BOONE AND SOUTHWESTERN HAMILTON COUNTIES
THROUGH 600 PM EDT...
At 528 PM EDT, a strong thunderstorm was located over Burlington,
moving east at 15 mph.
HAZARD...Wind gusts up to 50 mph, nickel size hail, 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. Hail may cause minor damage to outdoor
objects. Lightning can cause serious injury or death.
Visibility will be poor and hydroplaning is possible.
Locations impacted include...
Cincinnati, Covington, Florence, Independence, Erlanger, Newport,
Edgewood, Elsmere, Cheviot, Fort Mitchell, Villa Hills, Taylor Mill,
Bellevue, Fort Wright, Lawrenceburg, Ludlow, Crescent Springs,
Crestview Hills, Park Hills and Lakeside Park.
This includes the following Interstates...
I-71 in Ohio between mile markers 0 and 4.
I-74 in Ohio between mile markers 17 and 19.
I-75 in Kentucky between mile markers 177 and 191.
I-75 in Ohio between mile markers 0 and 7.
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.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
southeastern Indiana...northern Kentucky...and southwestern 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 3910 8484 3919 8449 3894 8448 3894 8483
3896 8484 3897 8483 3900 8485 3908 8487
TIME...MOT...LOC 2128Z 265DEG 15KT 3903 8474
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...50 MPH
ANPreliminary Local Storm Report
National Weather Service Wilmington OH
533 PM EDT Mon Jul 24 2023
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0523 PM Hail 1 E Mount Carmel 39.10N 84.28W
07/24/2023 E1.00 inch Clermont OH Public
Report from mPING: Quarter (1.00 in.).
&&
JDRSpecial Weather Statement
National Weather Service Wilmington OH
534 PM EDT Mon Jul 24 2023
KYZ093-096-097-OHZ078>080-242200-
Pendleton KY-Campbell KY-Bracken KY-Clermont OH-Highland OH-Brown OH-
534 PM EDT Mon Jul 24 2023
...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF NORTHWESTERN
BRACKEN, SOUTHERN CAMPBELL, NORTHEASTERN PENDLETON, SOUTHERN
CLERMONT, CENTRAL BROWN AND SOUTHWESTERN HIGHLAND COUNTIES THROUGH
600 PM EDT...
At 533 PM EDT, a strong thunderstorm was located over Neville, moving
east at 10 mph.
HAZARD...Wind gusts up to 45 mph and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Hail may cause minor damage to outdoor
objects.
Locations impacted include...
Georgetown, Mount Orab, Bethel, New Richmond, Williamsburg, Sardinia,
Felicity, Hamersville, Mentor, Moscow, Neville, California, Chilo,
Willow Grove, Saltair, Gubser Mill, Nicholsville, State Route 32 at
US Route 68, Ivor and Point Isabel.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a sturdy building.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northern Kentucky...and southwestern 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 3877 8422 3891 8433 3911 8389 3890 8371
TIME...MOT...LOC 2133Z 264DEG 8KT 3885 8420
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...45 MPH
ANSpecial Weather Statement
National Weather Service Wilmington OH
541 PM EDT Mon Jul 24 2023
KYZ092-093-OHZ077-078-242230-
Kenton KY-Campbell KY-Hamilton OH-Clermont OH-
541 PM EDT Mon Jul 24 2023
...A STRONG THUNDERSTORM WILL IMPACT PORTIONS OF NORTHERN KENTON,
NORTHERN CAMPBELL, SOUTHEASTERN HAMILTON AND WEST CENTRAL CLERMONT
COUNTIES THROUGH 630 PM EDT...
At 541 PM EDT, a strong thunderstorm was located over Covington,
moving east at 20 mph.
HAZARD...Wind gusts up to 50 mph, half inch hail, 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. Hail may cause minor damage to outdoor
objects. Lightning can cause serious injury or death.
Visibility will be poor and hydroplaning is possible.
Locations impacted include...
Cincinnati, Covington, Independence, Norwood, Erlanger, Fort Thomas,
Newport, Madeira, Edgewood, Alexandria, Fort Mitchell, Villa Hills,
Highland Heights, Milford, Taylor Mill, Bellevue, Fort Wright,
Dayton, Ludlow and Southgate.
This includes the following Interstates...
I-71 in Ohio between mile markers 0 and 9.
I-74 in Ohio between mile markers 18 and 19.
I-75 in Kentucky between mile markers 187 and 191.
I-75 in Ohio between mile markers 0 and 8.
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.
A Severe Thunderstorm Watch remains in effect until 1000 PM EDT for
northern Kentucky...and southwestern 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 3894 8458 3919 8457 3915 8423 3901 8411
3894 8424
TIME...MOT...LOC 2141Z 264DEG 17KT 3905 8451
MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH
ANThe Cincinnati radar (KILN), 71 km away, was scanning. The volume nearest the first event began at 21:42 UTC.
2 thunderstorm wind. Local standard time, as filed.
A tree was downed along Winding Way.
A few trees were downed along Mary Ingles Highway.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Kentucky in 2023Every state in 2023This day in weather historyWarnings in Kentucky, July 2023
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: 1116987, 1116988.