A low pressure system moving toward New England trailed a cold front through the Great Lakes region and into the Ohio Valley. Showers and storms formed out ahead of this frontal boundary.
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The episode as NWS ILN wrote it up.
A low pressure system moving toward New England trailed a cold front through the Great Lakes region and into the Ohio Valley. Showers and storms formed out ahead of this frontal boundary. Some storms produced heavy rainfall and localized 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 Wilmington, OH wrote its last area forecast discussion before the first event at Jul 1, 12:58 AM EST, 2 hours 47 minutes earlier.
Area Forecast Discussion National Weather Service Wilmington OH 158 AM EDT Tue Jul 1 2025 .SYNOPSIS... Showers and thunderstorms will be possible into the day on Tuesday in advance of a cold front. Precipitation will come to an end for Tuesday evening and fog will be possible across portions of the region for Tuesday night. After a brief moderation in temperatures, warmer temperatures will start to work back into the region into the weekend. && .NEAR TERM /THROUGH TODAY/... One area of precipitation across eastern portions of the region has decreased in coverage and moved out of the region. There is then a lull in the precipitation and also breaks in the cloud cover. Due to this have some patchy fog mention in. There are already some showers starting to develop across the Tri-State in advance of a larger area of showers and thunderstorms over Indiana. Expect additional shower and some thunderstorm activity to move into the region later in the overnight and into the day on Tuesday. Cannot rule out an isolated strong to severe storm with damaging winds the primary threat across primarily the southern and southeastern portions of the region today. In addition pockets of heavier rainfall will lead to the potential for localized flooding issues. A cold front will move through late in the day. Temperatures will be cooler today with highs in the low to middle 80s. && .SHORT TERM /TONIGHT THROUGH 6 PM WEDNESDAY/... Cold front will continue to move through during the evening. Precipitation will quickly come to an end. While drier air will start to work in there will be some lingering low level moisture and therefore have patchy fog in across the southeastern half of the forecast area primarily near and southeast of Interstate 71. Also have patchy dense fog in the river valleys. Temperatures on Wednesday are expected to be in the low to middle 80s with dewpoints in the 60s. CAA cu will be present. && .LONG TERM /WEDNESDAY NIGHT THROUGH MONDAY/... On Wednesday evening, an area of surface high pressure will be centered over the middle Mississippi Valley region, extending northeastward into the Ohio Valley. The upper level pattern will exhibit troughing over the northeastern states and Quebec, and ridging building into the central part of the CONUS. The ridging will begin to move east through the end of the week and into the weekend. This will put the ILN CWA into a pattern that will trend warmer with time. Conditions look to be generally dry, with the area a little too close to the center of the ridge (and the associated surface high) to be in a favorable location for storm development. Could probably be a very low chance of some showers and storms in northern Indiana and Ohio on Thursday and Friday, but chances in the ILN forecast area would be very low confidence at most. Dry weather is now forecast for Saturday as well, with the ridge remaining well-established. Since precipitation will not be the main concern through this period, a return to hot temperatures may be the bigger issue -- with highs reaching the lower 90s by Saturday. As of now, it looks like dewpoints may stay low enough to keep the area out of heat advisory criteria. By Sunday, there is more variance from model-to-model, but some signs that the ridge may begin to break down a bit as a shortwave approaches from the west. Chances for thunderstorms look perhaps a little higher for Sunday and Monday, but confidence remains low in any specifics. Temperatures should stay warm on Sunday (lower 90s) before starting to fall slightly early in the week (upper 80s on Monday). While chances for storms will exist for Sunday and beyond, as of now, no clear signs for organized convection or significant hazards through the extended forecast period. && .AVIATION /06Z TUESDAY THROUGH SATURDAY/... A few showers have developed near KCVG and KLUK. These showers will move near or over the TAF sites near the start of the TAF period. Then dry conditions are expected until later in the overnight and into the daytime morning hours when an area of showers and thunderstorms over Indiana moves into the area TAF sites. MVFR cigs and vsbys will be possible at times with this area of precipitation. Additional thunderstorm development will be possible during the day. There will then be a brief lull or decrease in activity before the cold front moves through later in the day. Have one or two hours of showers with that feature. There will be several wind shifts through the TAF period. Skies will start to clear out at the end of the TAF period and have some fog starting to develop at KLUK and the longer KCVG TAF. OUTLOOK...Reduced visibility with fog will be possible at some of the area TAF sites Tuesday night. && .ILN WATCHES/WARNINGS/ADVISORIES... OH...None. KY...None. IN...None. && SYNOPSIS... NEAR TERM... SHORT TERM... LONG TERM...Hatzos AVIATION...
Hazardous Weather Outlook National Weather Service Wilmington OH 432 AM EDT Tue Jul 1 2025 INZ050-OHZ026-034-035-042>046-051-052-020845- Wayne-Hardin-Mercer-Auglaize-Darke-Shelby-Logan-Union-Delaware-Miami- Champaign- 432 AM EDT Tue Jul 1 2025 This Hazardous Weather Outlook is for east central Indiana, central Ohio and west central Ohio. .DAY ONE...Today and tonight. The probability for widespread hazardous weather is low. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. INZ058-059-066-OHZ053>056-060>065-070>072-020845- Fayette-Union-Franklin-Clark-Madison-Licking-Preble-Montgomery- Greene-Pickaway-Fairfield-Butler-Warren-Clinton- 432 AM EDT Tue Jul 1 2025 This Hazardous Weather Outlook is for east central Indiana, southeast Indiana, central Ohio, southwest Ohio and west central Ohio. .DAY ONE...Today and tonight. Heavy rain will be possible at times today. Localized flooding will be possible with some of the storms today. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. INZ073>075-080-KYZ089>100-OHZ073-074-077>082-088-020845- Ripley-Dearborn-Ohio-Switzerland-Carroll-Gallatin-Boone-Kenton- Campbell-Owen-Grant-Pendleton-Bracken-Robertson-Mason-Lewis-Ross- Hocking-Hamilton-Clermont-Brown-Highland-Adams-Pike-Scioto- 432 AM EDT Tue Jul 1 2025 This Hazardous Weather Outlook is for southeast Indiana, northeast Kentucky, northern Kentucky, central Ohio, south central Ohio and southwest Ohio. .DAY ONE...Today and tonight. Isolated strong to severe thunderstorms will be possible today with damaging winds the primary threat. Localized flooding will also be possible with the storms. Patchy fog, some of which might be dense in spots with visibility a quarter of a mile or less, will be possible overnight tonight into early Wednesday morning. .DAYS TWO THROUGH SEVEN...Wednesday through Monday. There is a low probability for widespread hazardous weather. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Preliminary Local Storm Report
National Weather Service Wilmington OH
210 AM EDT Tue Jul 1 2025
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0757 PM Flood 5 ENE Chillicothe 39.37N 82.89W
06/29/2025 Ross OH Public
Delayed report from Sunday night. High water
on Dry Run Road south of Graves Road.
&&
HATZOSThe national radar mosaic for the moment the first event began.
3 flood. Local standard time, as filed.
High water was reported over the roadway at the intersection at U.S. Route 50 and County Road 675 East.
High water was reported on South Friendship Road just south of East County Road 300 South.
High water was reported near 650 West, just south of the Mary Gray Bird Sanctuary.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Indiana in 2025Every state in 2025This day in weather historyWarnings in Indiana, July 2025
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: 1270934, 1270936, 1270939.