A cluster of thunderstorms formed over Ohio during the late afternoon and early evening hours of July 24th, as weak disturbances aloft sparked convection in an unstable atmosphere. The slow-moving storms impacted Coshocton County most keenly with wind damage and flash flooding.
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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 PBZ wrote it up.
A cluster of thunderstorms formed over Ohio during the late afternoon and early evening hours of July 24th, as weak disturbances aloft sparked convection in an unstable atmosphere. The slow-moving storms impacted Coshocton County most keenly with wind damage and flash flooding.
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 Pittsburgh, PA wrote its last area forecast discussion before the first event at Jul 24, 3:33 PM EST, 2 hours 48 minutes earlier.
Area Forecast Discussion National Weather Service Pittsburgh PA 433 PM EDT Mon Jul 24 2023 .SYNOPSIS... Air conditioners will be cranking, especially from mid week on with the longest stretch of hot weather forecast so far this summer. Any day there is a chance for a shower or storm, but at this point no washouts. The weather does cool down the second half of the weekend. The hottest days this week will be Thursday and Friday as heat index numbers will be well into the 90s outside of the mountains. && .NEAR TERM /THROUGH TUESDAY/... Quick update to add isolated PoPs for much of the region due to activity already present, so far mainly to the east of Pittsburgh. With little to organize convection, expect most of this to remain isolated. While 800-1000 J/kg of DCAPE is present over the region, overall instability profiles seem a little too weak to support strong updrafts, so would expect the strong to severe downburst threat to remain very low. Previous discussion... Little overall change to the pattern in the near term. Weak ripples in a fast mid level flow for late July will continue to pass overhead and generate scattered convection, mostly after dusk here. A cluster of storms over Ohio that develop later today will slowly pivot east - northeast during the overnight hours. There is enough forcing for this cluster to maintain itself during the night, especially in eastern Ohio. Will carry higher pops / high end chance/ there and lower chance numbers over West Virginia and western Pennsylvania. Convective temperatures are lower Tuesday, so any activity should get going by midday. Areas north of US422 and the mountains stand the best chance of measurable rainfall due to proximity of energy aloft and elevated heat source forcing. As of now, any storm could be strong, but not expecting anything severe. Temperatures start on their upward trend with daytime highs Tuesday in the mid and upper 80s. Any smoke from Canadian wildfires will be aloft keeping that milk sky. The higher concentrations stay to our west over Indiana and northwestern Ohio. && .SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY NIGHT/... * Key message #1 - heat index values in the mid and upper 90s. H5 heights build on ensembles eclipsing 588dm Wednesday and inching up a decameter or two through Friday. This spells widespread upper 80s to lower 90s over the region for daytime highs. Depending how much moisture can be advected up with light southwesterly flow dewpoints won't surpass 70F until Wednesday night into Thursday morning and persist through Friday. The mountains of course will remain in the 60s, if you are looking for a somewhat cooler place to beat the humidity. NBM probabilities of seeing 90F or greater are highest Thursday with 60 to 70% save for FKL and DUJ, where it is in the 40 percentile range. Wednesday the values are about 10-20% lower, outside of Ohio where they still are above 60%. So far this summer only New Philadelphia and Zanesville have reached 90F or greater more than once. They did it twice. The remaining climate sites have it hit once (including Pittsburgh) or zero like DuBois and Wheeling. The last time we were this hot was early June. Of course then dewpoints where in the 50s. Heat indexes Thursday and Friday are close to advisory criteria which is 100-104 degrees. The last heat advisory issued by our office was June 6th 2022. For now, will continue to highlight this risk in the hazardous weather outlook. At this time record highs are not in jeopardy, however there is a 20% probability of setting a new record low high Wednesday night/ Thursday morning at Pittsburgh. * Key message #2 - strong to severe storms possible Wednesday night Potential for an MCS to be dropping down from the upper midwest during this time frame. With decent height falls and plenty of thermodynamic instability there will be enough juice to keep any storms complex. Didn't get too fancy with pops, but something to watch out for especially given the thermal gradient at H7 where these things tend to ride along. && .LONG TERM /FRIDAY THROUGH MONDAY/... Long range operational runs continue to differ on strength of mid level ridge over the Ohio valley. Two camps which lead to below average uncertainty with respect to daytime highs this weekend on top of precipitation potential. If the GEFS is correct, the belt of westerlies drops south with a baroclinic zone spreading showers and storms over the region Saturday. EPS keeps H5 heights north of 590dm so the steak of 90F weather continues on its statistical output. For now have kept things consistent with previous shifts and the NBM which rides the middle of the road with mid and upper 80s next weekend. Pops follow a similar trend of chance numbers no matter what solution verifies cause we will have either diurnal storms under a ridge or ones ahead of a boundary. At this time smoke from Canadian wildfires should stay to our north and west, at least higher concentrations. We could see a milky appearance to the sky from mid week through the extended given upper level flow pattern. All indications do indicate a cool down early next week. && .AVIATION /21Z MONDAY THROUGH SATURDAY/... Scattered cumulus field in progress with diurnal heating. Lonely shower or two can not be ruled out. Coverage looks to be too limited to warrant a mention in TAFs at this time. VFR conditions prevail outside of convection. Winds remain primarily out of the west at or below 10 knots through the TAF period. Another fast moving upper trough over Minnesota currently is forecast to drop into Ohio later tonight. Somewhat higher probability of showers exists for the southern TAFs so have PROB30 at KZZV KHLG KMGW and KLBE for late tonight. HRRR suggests isolated showers are possible from 06z to 12z elsewhere but probability is quite low so will leave out for now. MVFR fog is possible in the wake of the showers mainly in the ZZV and HLG sites late tonight. Probability currently too low to include. .OUTLOOK... General VFR is expected through most of the period, though a series of weak disturbances will result in mainly diurnal isolated shower and thunderstorm chances. Patchy late night/early morning river valley fog is also possible. Potential exists for organized line of thunderstorms late Wednesday night as activity may move from Michigan into Ohio. Heat and instability builds Thursday and Friday with potential for strong thunderstorms with gusty winds. && .PBZ WATCHES/WARNINGS/ADVISORIES... PA...None. OH...None. WV...None. && SYNOPSIS...McMullen NEAR TERM...McMullen SHORT TERM...McMullen LONG TERM...McMullen AVIATION...Craven
Hazardous Weather Outlook National Weather Service Pittsburgh PA 952 AM EDT Mon Jul 24 2023 OHZ039>041-048>050-057>059-068-069-PAZ007>009-013>016-020>022-029- 031-073>078-WVZ001>004-012-021-509>512-251400- Tuscarawas-Carroll-Columbiana-Coshocton-Harrison-Jefferson OH- Muskingum-Guernsey-Belmont-Noble-Monroe-Mercer-Venango-Forest- Lawrence-Butler-Clarion-Jefferson PA-Beaver-Allegheny-Armstrong- Washington-Greene-Westmoreland-Higher Elevations of Westmoreland- Fayette-Higher Elevations of Fayette-Indiana- Higher Elevations of Indiana-Hancock-Brooke-Ohio-Marshall-Wetzel- Marion-Monongalia- Ridges of Eastern Monongalia and Northwestern Preston-Preston- Eastern Preston- 952 AM EDT Mon Jul 24 2023 This Hazardous Weather Outlook is for east central Ohio, western Pennsylvania, and northern West Virginia. .DAY ONE...Today and tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Heat index values will be in the mid and upper 90s Wednesday through Friday during the afternoon. Values could top 100 degrees Friday. A heat advisory may be needed later this week if heat index values reach 100 degrees. There is also a risk of severe weather Friday from damaging winds. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. WVZ513-514-251400- Western Tucker-Eastern Tucker- 952 AM EDT Mon Jul 24 2023 This Hazardous Weather Outlook is for northern West Virginia. .DAY ONE...Today and tonight. Hazardous weather is not expected at this time. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. There is a risk of severe weather Friday from damaging winds. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Pittsburgh PA
706 PM EDT Mon Jul 24 2023
OHZ048-242330-
Coshocton OH-
706 PM EDT Mon Jul 24 2023
...A STRONG THUNDERSTORM WILL IMPACT NORTHWESTERN COSHOCTON COUNTY
THROUGH 730 PM EDT...
At 706 PM EDT, Doppler radar was tracking a strong thunderstorm 8
miles southeast of Danville, or 17 miles northwest of Coshocton,
moving east at 15 mph.
HAZARD...Wind gusts up to 50 mph.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects.
Locations impacted include...
Warsaw, Nellie, Walhonding, Blissfield, New Guilford, and Layland.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
&&
LAT...LON 4045 8219 4045 8197 4033 8189 4026 8219
TIME...MOT...LOC 2306Z 250DEG 11KT 4037 8214
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...50 MPH
MilcarekThe Cleveland radar (KCLE), 116 km away, was scanning. The volume nearest the first event began at 23:18 UTC.
3 thunderstorm wind, 2 flash flood. Local standard time, as filed.
Multiple trees were reported to be down across the county.
Trees were reported to have fell on houses on both South 16th Street and Wilson Avenue.
Many roads were reported to be flooded in Coshocton.
Numerous county and state roads were closed due to flooding, including SR-83 and SR-93.
A tree was reported down along State Route 265 east of Lore City.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2023Every state in 2023This day in weather historyWarnings in Ohio, 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: 1125441, 1125442, 1125443, 1127566, 1125445.