Showers and thunderstorms affected the Ohio Valley during the afternoon and evening as a cold front 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.
Showers and thunderstorms affected the Ohio Valley during the afternoon and evening as a cold front 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 Jul 29, 1:06 PM EST, 56 minutes earlier.
AREA FORECAST DISCUSSION National Weather Service Wilmington OH 206 PM EDT Thu Jul 29 2021 .SYNOPSIS... Showers and thunderstorms will weaken as they move into the area this morning. But additional storms will develop this afternoon ahead of a cold front. Once the front moves through tonight, temperatures will become slightly below normal and remain that way into next week. && .NEAR TERM /UNTIL 6 PM THIS EVENING/... MCS has weakened substantially this morning and is primarily east of I-71 as of 14z. There is still some convection that will cross through Delaware and Licking counties associated with an MCV that has formed in the northern tier of this system. Elsewhere, just a few light showers are possible, mainly east of I-71 this morning. Have trended PoPs lower in our west-central Ohio and Miami Valley counties this morning with this precipitation pushing eastward. Visible satellite imagery shows a clear sector beginning to form in portions of NE Indiana into NW Ohio behind this system. Most locations west of I-71 will begin to observe more breaks in the clouds this morning which will help increase insolation and total amount of destabilization. With the lull in precipitation, the best instability looks to be in our western counties down into the Tri-state area. SREF ensemble mean still has around 3000 J/kg of MLCAPE developing this afternoon closer towards the Cincinnati metro. While CAMs are in moderate disagreement (between each other and consecutive runs of the same model) in the evolution and location of afternoon storms, there does appear to be a more prominent signal for the strongest convection developing in portions of Illinois/Indiana which will sink southward and impact portions of our southwestern counties later this afternoon. The timeframe of greatest concern is currently from about 4pm-9pm for our western counties down into the Tri-state area. The primary threat is still for damaging winds and large hail with localized flooding possible due to the heavy downpours. While our environment isn't the most favorable for tornadoes, there are still a number of parameters advantageous for tornadogenesis, and therefore cannot rule out an isolated tornado forming during the storms this afternoon/evening. For our remaining eastern locations, there appears to be greater uncertainty with the development and organization of storms. Expecting there to be isolated to scattered storms that begin firing off again around 18z if not slightly earlier, with PoPs diminishing from north to south beginning in the late afternoon/early evening. The primary severe threat looks to end by the late evening hours, but there still may be a few storms that linger until about midnight. && .SHORT TERM /6 PM THIS EVENING THROUGH 6 PM FRIDAY/... Storms will probably still be ongoing at the beginning of the period but then clear the area in the evening. Severe threat will continue until that happens. Cannot rule out some additional showers dropping into central Ohio as a cold front moves through later in the night. The front will move through the entire area by daybreak Friday. High pressure will then start to build in on Friday with conditions being not quite as warm and not as humid. && .LONG TERM /FRIDAY NIGHT THROUGH WEDNESDAY/... Area will be under a northwest flow aloft to start the long term, with a broad trough present over the Eastern CONUS. Weak surface high pressure forming beneath the confluent upper flow should provide mainly dry conditions Friday night and Saturday, though a weak disturbance may trigger a few showers in southwest counties. A limited threat for showers and thunderstorms spreads across the entire FA Sunday as a batch of short wave energy rounding the base of the sharpening upper trough enhances lift. A lack of weather producing features and moisture points to mainly dry weather for Monday through Wednesday, with precip chances confined to isolated showers and thunderstorms Wednesday due to disturbances associated with the persistent upper trough. Lower than average geopotential heights signal below normal temperatures through the period. Expect highs within a few degrees of 80 Saturday through Tuesday, rising to the low and mid 80s Wednesday. && .AVIATION /18Z THURSDAY THROUGH TUESDAY/... Scattered storms expected to develop this afternoon and linger into the late evening hours. Some of these storms will be strong to severe. Have included a tempo group at every taf site to indicate potential timing of TSRA based on latest model guidance. Heavy downpours will lead to reduced vsbys and some MVFR CIG reductions - IFR reductions are less likely but could happen briefly in stronger storms. Strong wind gusts and large hail will be the primary threats with these storms. Included an increase in wind gusts to near 25 kts in the tempo group, but will monitor trends and amend if stronger gusts are expected with thunderstorms. Thunderstorm threat diminishes this evening from north to south, but a few storms could linger until about midnight for our southern taf sites. Afterwards, a number of sites will observe MVFR CIG and vsby reductions overnight with the passing cold front. Surface winds will shift towards the north-northwest, but remain fairly light below 10 kts overnight. May have held onto MVFR CIGs longer than needed, but CIG improvement to VFR is expected around sunrise on Friday. Prevailing VFR expected the remainder of the taf period on Friday with light northerly winds. .OUTLOOK... MVFR ceilings and visibilities are possible Saturday night into Sunday. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS... NEAR TERM...Clark SHORT TERM... LONG TERM...Coniglio AVIATION...Clark
Hazardous Weather Outlook National Weather Service Wilmington OH 510 AM EDT Thu Jul 29 2021 INZ050-OHZ026-034-035-042>046-051>056-060>065-072>074-080-300915- Wayne-Hardin-Mercer-Auglaize-Darke-Shelby-Logan-Union OH-Delaware- Miami-Champaign-Clark-Madison-Franklin OH-Licking-Preble-Montgomery- Greene-Fayette OH-Pickaway-Fairfield-Clinton-Ross-Hocking-Highland- 510 AM EDT Thu Jul 29 2021 This Hazardous Weather Outlook is for East Central Indiana, Central Ohio, South Central Ohio, Southwest Ohio and West Central Ohio. .DAY ONE...Today and tonight. Showers and thunderstorms this morning are not expected to be severe. However, additional thunderstorms are forecast to develop this afternoon. A few severe storms will be possible with damaging winds being the primary threat. Large hail or an isolated tornado cannot be ruled out. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon. INZ058-059-066-073>075-080-KYZ089>100-OHZ070-071-077>079-081-082-088- 300915- Fayette IN-Union IN-Franklin IN-Ripley-Dearborn-Ohio-Switzerland- Carroll-Gallatin-Boone-Kenton-Campbell-Owen-Grant-Pendleton-Bracken- Robertson-Mason-Lewis-Butler-Warren-Hamilton-Clermont-Brown-Adams- Pike-Scioto- 510 AM EDT Thu Jul 29 2021 This Hazardous Weather Outlook is for East Central Indiana, Southeast Indiana, Northeast Kentucky, Northern Kentucky, South Central Ohio and Southwest Ohio. .DAY ONE...Today and tonight. The heat index will be between 95 and 100 this afternoon. Thunderstorms will develop and move across the area this afternoon into the evening. A few severe storms will be possible with damaging winds being the primary threat. Large hail or an isolated tornado cannot be ruled out. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed this afternoon and evening.
Special Weather Statement
National Weather Service Wilmington OH
951 AM EDT Thu Jul 29 2021
OHZ046-055-056-291430-
Licking OH-Delaware OH-Franklin OH-
951 AM EDT Thu Jul 29 2021
...A STRONG THUNDERSTORM WILL AFFECT NORTHEASTERN FRANKLIN...
SOUTHEASTERN DELAWARE AND LICKING COUNTIES UNTIL 1030 AM EDT...
At 951 AM EDT, radar indicated a strong thunderstorm near Sunbury,
moving southeast at 45 mph.
STORM HAZARDS INCLUDE...
Winds to 40 mph...
Pea size hail...
Locations impacted include...
Newark, Westerville, Delaware, Heath, Granville, Pataskala,
Johnstown, Sunbury, Buckeye Lake, Hebron, Utica, Granville South,
Marne, Beechwood Trails, Harbor Hills, New Albany, Jersey, Galena,
Alexandria and Hartford.
This includes the following Interstates...
I-70 in Ohio between mile markers 128 and 131.
I-71 in Ohio between mile markers 124 and 138.
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 3999 8232 3993 8247 3993 8249 4022 8305
4036 8294 4035 8275 4028 8275 4027 8248
4025 8248 4024 8225
TIME...MOT...LOC 1351Z 297DEG 41KT 4023 8292
BinauSpecial Weather Statement National Weather Service Wilmington OH 229 PM EDT Thu Jul 29 2021 OHZ045-046-054-055-291900- Delaware OH-Madison OH-Franklin OH-Union OH- 229 PM EDT Thu Jul 29 2021 ...A STRONG THUNDERSTORM WILL AFFECT NORTHWESTERN FRANKLIN... SOUTHWESTERN DELAWARE...NORTHEASTERN MADISON AND SOUTHEASTERN UNION COUNTIES IN CENTRAL OHIO UNTIL 300 PM EDT... At 228 PM EDT, radar indicated a strong thunderstorm near Plain City, moving east at 30 mph. STORM HAZARDS INCLUDE... Winds to 45 mph... Pea size hail... Locations impacted include... Columbus, Dublin, Westerville, Upper Arlington, Hilliard, Marysville, Worthington, Powell, Plain City, Minerva Park, New California, Ohio State University, Polaris, Grandview Heights, Shawnee Hills, Ostrander, Valleyview, Marble Cliff, Riverlea and Unionville Center. This includes the following Interstates... I-70 in Ohio between mile markers 93 and 100. I-71 in Ohio between mile markers 106 and 107, and between mile markers 109 and 125. 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 4008 8343 4030 8332 4018 8286 3993 8300 TIME...MOT...LOC 1828Z 287DEG 24KT 4015 8332 ch
The Cincinnati radar (KILN), 96 km away, was scanning. The volume nearest the first event began at 18:59 UTC.
15 thunderstorm wind, 4 flood, 3 hail, 1 tornado, 1 flash flood. Local standard time, as filed.
A healthy tree was downed on Summit Street.
There were several reports of quarter sized hail near Short North and downtown Columbus.
Numerous large branches and wires were downed throughout the city.
Several trees were downed near the intersection of South Old State Road and Hollenback Road.
A large tree limb was downed.
Numerous trees were downed on Dyer Road. A garage door was also blown in and damaged.
Several trees and power lines were downed.
A few trees were downed onto the northbound lanes of U.S. 62.
Based on aerial footage and photos, the tornado appeared to have initially touched down in a field just northwest of Dick Road. It then crossed Dick Road and produced damage on a farm. Some roof damage was noted on a single story residence on Dick Road, while a large outbuilding was also destroyed. Aerial footage confirmed evidence of the tornado in the grass and field between Dick Road and Mouser Road. Debris from the outbuilding was also scattered throughout the field between Dick Road and Mouser Road. Additional damage occurred on a property on Mouser Road, where two barns were completely destroyed. The tornado is believed to have then lifted shortly after it destroyed the barns. While the tornado ended before reaching U.S. 22, debris from the destroyed Mouser Road barns was thrown about one quarter of a mile and was noted on the other side of U.S. 22.
Based on the evaluation of the damage, winds associated with this brief tornado were around 85 mph.
A tree and several large branches were downed along U.S. 22 between Washington Court House and New Holland.
A few trees were downed in the Cedarville area. Power lines were downed near the intersection of U.S. 42 and James Barber Road.
A few trees were downed on the north side of Jamestown. Some house siding was also damaged and a 40 foot camper was blown over.
A few trees and power lines were downed.
A few trees were downed.
Several trees were downed near the intersection of Smith Road and Zimmerman Road.
About a foot of water was covering U.S. 22.
A tree was downed on State Route 134 near Davids Drive.
High water was reported on several roads, including State Route 124 and Beavers Ridge Road.
One lane of a road was closed due to high water from a flooded culvert.
High water was reported on U.S. 50.
Several trees and power lines were downed in the Otway area.
Several roads were closed in the Idaho area due to high water. Rising water forced some evacuations from a few homes.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2021Every state in 2021This day in weather historyThe tornado archive for Ohio, 2021Warnings in Ohio, July 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: 965236, 965237, 965238, 965239, 965240, 965241, 965245, 965246, 965247, 965375, 965377, 965378, 965379, 965380, 965382, 965383, 965384, 965386, 965385, 965387, 965390, 965391, 965399, 965407.