Severe thunderstorms and tornadoes developed ahead of a strong cold front. Between one to three inches of rain fell across the region.

Flash Flood in BUTLER, OHIO
From 03-APR-18 07:31:00 to 03-APR-18 09:31:00 (EST-5)
Location: MILLVILLE
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

U.S. 27 was closed in both directions between Kirchling and Millville Roads due to high water.

Flash Flood in BUTLER, OHIO
From 03-APR-18 07:33:00 to 03-APR-18 09:33:00 (EST-5)
Location: PRINCETON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Route 747 was closed in both directions between Princeton and Milikin Roads due to high water.

Flash Flood in PREBLE, OHIO
From 03-APR-18 10:37:00 to 03-APR-18 12:37:00 (EST-5)
Location: SUGAR VLY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Water was covering the road.

Flash Flood in PREBLE, OHIO
From 03-APR-18 10:37:00 to 03-APR-18 12:37:00 (EST-5)
Location: EATON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Water was covering the road.

Flash Flood in PREBLE, OHIO
From 03-APR-18 10:37:00 to 03-APR-18 12:37:00 (EST-5)
Location: EATON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Water was covering the road.

Flash Flood in PREBLE, OHIO
From 03-APR-18 15:17:00 to 03-APR-18 17:17:00 (EST-5)
Location: LEWISBURG GILMER ARP
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Road closures across the county continued. Additional rainfall was making the situation worse.

Flash Flood in DARKE, OHIO
From 03-APR-18 15:27:00 to 03-APR-18 17:27:00 (EST-5)
Location: VERSAILLES
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: State Official

Several roads were closed due to flash flooding.

Flood in GREENE, OHIO
From 03-APR-18 07:44:00 to 03-APR-18 09:44:00 (EST-5)
Location: BELLBROOK
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Department of Highways

State Route 725 was closed in both directions between Lower Bellbrook Road and Penewit Road due to flooding.

Flood in WARREN, OHIO
From 03-APR-18 08:36:00 to 03-APR-18 10:36:00 (EST-5)
Location: LEBANON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Emergency Manager

Numerous roads were closed, including: Glosser Road between State Route 63 and U.S. Route 42, Stubbs Mills Road between Route 22 and Mason-Morrow-Millgrove Road, and Lower Springboro Road between 4th and Pioneer Blvd.

Flood in CLARK, OHIO
From 03-APR-18 08:51:00 to 03-APR-18 10:51:00 (EST-5)
Location: ROCK WAY
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A 40 foot section of Lower Valley Pike was covered with standing water.

Flood in LOGAN, OHIO
From 03-APR-18 17:10:00 to 03-APR-18 19:10:00 (EST-5)
Location: BELLEFONTAINE ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Six inches of water was reported over Township Rd 219.

Flood in MADISON, OHIO
From 03-APR-18 17:19:00 to 03-APR-18 19:19:00 (EST-5)
Location: WEST JEFFERSON
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Water was reported on several roadways.

Flood in CLARK, OHIO
From 04-APR-18 02:00:00 to 04-APR-18 04:00:00 (EST-5)
Location: ROCK WAY
Flood cause: Heavy Rain
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Law Enforcement

A water rescue occurred after a High Water/Road Closed sign was blown down and a motorist drove into flooded roadway and needed to be rescued.

Hail in MONTGOMERY, OHIO
From 03-APR-18 14:41:00 to 03-APR-18 14:45:00 (EST-5)
Location: NEW LEBANON
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in BUTLER, OHIO
From 03-APR-18 14:50:00 to 03-APR-18 14:55:00 (EST-5)
Location: OXFORD MIAMI UNIV AR
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in PREBLE, OHIO
From 03-APR-18 14:53:00 to 03-APR-18 14:58:00 (EST-5)
Location: CAMDEN
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in MONTGOMERY, OHIO
From 03-APR-18 15:01:00 to 03-APR-18 15:06:00 (EST-5)
Location: FARMERSVILLE
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in MONTGOMERY, OHIO
From 03-APR-18 15:10:00 to 03-APR-18 15:15:00 (EST-5)
Location: FARMERSVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in MONTGOMERY, OHIO
From 03-APR-18 15:13:00 to 03-APR-18 15:18:00 (EST-5)
Location: NEW LEBANON
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The spotter also saw a rotating wall cloud.

Hail in FRANKLIN, OHIO
From 03-APR-18 16:31:00 to 03-APR-18 16:36:00 (EST-5)
Location: GROVE CITY
Magnitude: 1.50 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: NWS Employee

Hail in FRANKLIN, OHIO
From 03-APR-18 16:33:00 to 03-APR-18 16:38:00 (EST-5)
Location: GROVE CITY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PICKAWAY, OHIO
From 03-APR-18 16:47:00 to 03-APR-18 16:52:00 (EST-5)
Location: MARCY
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in PICKAWAY, OHIO
From 03-APR-18 16:50:00 to 03-APR-18 16:55:00 (EST-5)
Location: NEW HOLLAND
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in FAIRFIELD, OHIO
From 03-APR-18 16:59:00 to 03-APR-18 17:04:00 (EST-5)
Location: BALTIMORE
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hail in ADAMS, OHIO
From 03-APR-18 17:58:00 to 03-APR-18 18:03:00 (EST-5)
Location: BENTONVILLE
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in ADAMS, OHIO
From 03-APR-18 18:03:00 to 03-APR-18 18:08:00 (EST-5)
Location: MANCHESTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Tornado in CLARK, OHIO
From 03-APR-18 15:56:00 to 03-APR-18 15:59:00 (EST-5)
Location: CORTVILLE
Tornado F-scale: EF1
Property damage: 85.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado touched down on Cortsville Road where a barn was destroyed and a large hardwood tree was knocked down.
Damage continued to the east-northeast, particularly at the McDorman Farm on Selma Pike. At this property, multiple buildings were damaged. A significant portion of the roof of one building was completely lifted off and blown into an adjacent field. On another building, multiple sides had siding removed and sustained some roof damage. Exterior walls on multiple sides of a large barn were also damaged.
It is possible that the tornado briefly lifted beyond this property, although additional tornadic damage was observed as far east as Clifton Road. Shutters were removed and lifted from multiple sides of a two-story home. One tree was also downed nearby. An eyewitness report confirmed the presence of a tornado in this vicinity. The tornado is believed to have ended shortly after as no additional damage was observed further east along Clifton Road and within South Charleston.

Thunderstorm Wind in PREBLE, OHIO
From 03-APR-18 14:35:00 to 03-APR-18 14:45:00 (EST-5)
Location: MORNING SUN
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A large tree and power lines were knocked down on Route 732 near Hueston Woods State Park.

Thunderstorm Wind in MONTGOMERY, OHIO
From 03-APR-18 15:20:00 to 03-APR-18 15:30:00 (EST-5)
Location: SINGING HILLS
Magnitude: 50.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Large debris was reported over Route 741, north of the Dayton Mall.

Thunderstorm Wind in MONTGOMERY, OHIO
From 03-APR-18 15:27:00 to 03-APR-18 15:37:00 (EST-5)
Location: MURLIN HGTS
Magnitude: 50.00 EG
Property damage: 0.50K
Crop damage: 0.00K
Reported by: Trained Spotter

Large branches were knocked down.

Thunderstorm Wind in GREENE, OHIO
From 03-APR-18 15:40:00 to 03-APR-18 15:50:00 (EST-5)
Location: POGUE CORNERS
Magnitude: 50.00 EG
Property damage: 2.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Trees and a fence were knocked down onto Krepps Road.

Thunderstorm Wind in GREENE, OHIO
From 03-APR-18 15:42:00 to 03-APR-18 15:52:00 (EST-5)
Location: OLDTOWN
Magnitude: 50.00 EG
Property damage: 15.00K
Crop damage: 0.00K
Reported by: State Official

Two houses received structural damage, along with a barn.

Thunderstorm Wind in GREENE, OHIO
From 03-APR-18 15:45:00 to 03-APR-18 15:55:00 (EST-5)
Location: OLDTOWN
Magnitude: 50.00 EG
Property damage: 4.00K
Crop damage: 0.00K
Reported by: Law Enforcement

Numerous trees were knocked down near the intersection of U.S. 68 and Route 235.

Thunderstorm Wind in FAIRFIELD, OHIO
From 03-APR-18 17:05:00 to 03-APR-18 17:15:00 (EST-5)
Location: LANCASTER
Magnitude: 50.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: State Official

Trees were reported down countywide.

Thunderstorm Wind in MADISON, OHIO
From 03-APR-18 16:14:00 to 03-APR-18 16:19:00 (EST-5)
Location: NEWPORT
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Barn damage was observed on Old Xenia Road.

Thunderstorm Wind in MADISON, OHIO
From 03-APR-18 16:16:00 to 03-APR-18 16:21:00 (EST-5)
Location: LONDON
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Barn damage was observed on State Route 56 southeast of London.

Hail in FRANKLIN, OHIO
From 03-APR-18 16:43:00 to 03-APR-18 16:48:00 (EST-5)
Location: GROVE CITY
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Hail in FRANKLIN, OHIO
From 03-APR-18 16:44:00 to 03-APR-18 16:49:00 (EST-5)
Location: CANAL WINCHESTER
Magnitude: 0.75 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in FRANKLIN, OHIO
From 03-APR-18 16:44:00 to 03-APR-18 16:54:00 (EST-5)
Location: (LCK)RCKENBCKR ARPT
Magnitude: 50.00 EG
Property damage: 5.00K
Crop damage: 0.00K
Reported by: Public

Several large pine trees were knocked downed, along with shingles off of the residence.

Thunderstorm Wind in GREENE, OHIO
From 03-APR-18 15:51:00 to 03-APR-18 15:56:00 (EST-5)
Location: YELLOW SPGS
Magnitude: 65.00 EG
Property damage: 1.00K
Crop damage: 0.00K
Reported by: Amateur Radio

A large tree was uprooted at the intersection of Rife and South River Roads.

Hail in FRANKLIN, OHIO
From 03-APR-18 16:48:00 to 03-APR-18 16:53:00 (EST-5)
Location: CANAL WINCHESTER
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Flood in FAIRFIELD, OHIO
From 03-APR-18 08:00:00 to 03-APR-18 10:00:00 (EST-5)
Location: BREMEN ARPT
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

A creek was out of its banks and flowing over Yana Lane.

Flood in GREENE, OHIO
From 03-APR-18 06:52:00 to 03-APR-18 08:52:00 (EST-5)
Location: FAIRBORN
Flood cause: Heavy Rain
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Hebble Creek overflowed its banks in the area of Hidden Hills Wetlands Park. The water was at least 8 inches deep.

Hail in FRANKLIN, OHIO
From 03-APR-18 16:43:00 to 03-APR-18 16:48:00 (EST-5)
Location: PLEASANT CORNERS
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Public

Thunderstorm Wind in MADISON, OHIO
From 03-APR-18 16:15:00 to 03-APR-18 16:20:00 (EST-5)
Location: NEWPORT
Magnitude: 61.00 EG
Property damage: 10.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

Barn damage was observed on State Route 38 south of Newport.

Hail in FRANKLIN, OHIO
From 03-APR-18 16:44:00 to 03-APR-18 16:49:00 (EST-5)
Location: GROVEPORT
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

Thunderstorm Wind in GREENE, OHIO
From 03-APR-18 15:50:00 to 03-APR-18 15:55:00 (EST-5)
Location: YELLOW SPGS
Magnitude: 70.00 EG
Property damage: 25.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

There was widespread tree and roof damage along Wilberforce-Clifton Road and State Route 72 south of Clifton.

Thunderstorm Wind in FRANKLIN, OHIO
From 03-APR-18 16:37:00 to 03-APR-18 16:47:00 (EST-5)
Location: GROVE CITY
Magnitude: 50.00 EG
Property damage: 3.00K
Crop damage: 0.00K
Reported by: Broadcast Media

Multiple utility poles were knocked down.

Hail in FRANKLIN, OHIO
From 03-APR-18 16:47:00 to 03-APR-18 16:52:00 (EST-5)
Location: GROVEPORT
Magnitude: 1.00 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Hail in PREBLE, OHIO
From 03-APR-18 14:56:00 to 03-APR-18 15:01:00 (EST-5)
Location: KITSON CORNERS
Magnitude: 1.25 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Trained Spotter

The hail sizes ranged between the size of a quarter and half dollar.

Tornado in GREENE, OHIO
From 03-APR-18 15:45:00 to 03-APR-18 15:50:00 (EST-5)
Location: BRYON
Tornado F-scale: EF1
Property damage: 500.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado first touched down in the 1000 block of Ludlow Road in Beavercreek Township. One barn on the property had roof damage, while the other barn had wall damage. In addition, a silo collapsed. Numerous hardwood and softwood trees were damaged and there was roof and chimney damage to the home. This damage was consistent with low end EF1/high end EF0 damage, with wind estimated at 85 to 90 mph.
Several properties further east along Ludlow Road sustained damage. The most significant being in the 800 block, where a home sustained more than 30 percent of its roof torn off, multiple broken windows, and structural damage to both the exterior and interior walls of the home. Damage to the home was consistent with wind speeds of 90 to 95 mph, EF1 category. Additional significant barn and tree damage occurred on the property.
Further east on Ludlow Road, in the 700 to 500 block, several homes sustained roof damage, with significant damage to barns. Such damage was consistent with high end EF0 damage of 75 to 80 mph.
The tornado continued eastward in the 2400 North Block of U.S. 68. A home received minor siding and roof damage as well as a collapsed chimney, with a fence also destroyed. A large camper was rolled over and the roof was lifted off a brick outbuilding. Damage to this property was consistent with EF1 strength of near 90 mph.
Further east along Clifton Road, structural damage occurred to barns along with roof and porch damage to homes in the 700 and 800 block of Clifton Road. Damage in this area was consistent with EF0 damage of about 75 mph.
Damage became more significant further northeast along Clifton Road, where substantial damage occurred to several barns, along with snapped softwood and hardwood trees. In addition, significant roof and siding damage was present on the residences of two homes in the 2400 block of Clifton Road. Damage here was consistent with low end EF1 between 86 and 90 mph. A sheep farm in this area did experience the loss of five sheep.
The northern most extent of confirmed tornado damage was along State Route 72 and Clifton Road. While there was widespread tree and roof damage along Wilberforce-Clifton Road and State Route 72 south of Clifton, this damage was all in the same direction to the north-northeast, without substantial evidence of back-splatter as associated with rotation. While the wind damage was significant in this area, estimated to be as high as 80 mph, this damage was more consistent with straight line wind damage.

Tornado in MADISON, OHIO
From 03-APR-18 16:14:00 to 03-APR-18 16:15:00 (EST-5)
Location: NEWPORT
Tornado F-scale: EF0
Property damage: 60.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado appears to have touched down at a farm on Roberts Mill Road, where several barns sustained heavy damage. These barns had complete roof removal and the collapse of exterior walls. Barn roofing and wall material was thrown west- northwest across Roberts Mill Road into the tops of trees of adjacent properties, and strewn across fields on the west side of Roberts Mill Road. The damage is consistent with wind speeds around 85 mph.
Other barn damage observed on State Route 38 south of Newport, Old Xenia Road SW south of London, and on State Route 56 southeast of London, was all determined to be nontornadic with no conclusive components of typical tornado damage.

Tornado in FRANKLIN, OHIO
From 03-APR-18 16:37:00 to 03-APR-18 16:41:00 (EST-5)
Location: GROVE CITY
Tornado F-scale: EF1
Property damage: 120.00K
Crop damage: 0.00K
Reported by: NWS Storm Survey

The tornado initially touched down just south of Orders Road and moved northeast, crossing Hoover Road and I-71, and eventually White Road before lifting just north of White Road and just south of Stringtown Road.
The most significant damage along this path occurred on the west side of I-71, first near Orders Road where 4 large utility poles were snapped at the base and lying across Orders Road. Structural damage was found to multiple townhouses and other structures on the west side of Hoover Road, where a newly built detached garage was completely destroyed, and several townhouses had partial uplift and removal of roofing and damage to exterior walls. Many townhouses had garage doors pushed in, with portions of roofs removed. Debris spatter was indicated on all 4 sides of several structures. Four more large electrical transmission poles were snapped on the west side of Hoover Road. Eyewitness photos and videos confirm a tornado on the ground in this area. The most significant damage in this area was consistent with wind speeds around 105 mph and represents the strongest of the winds associated with this tornado.
As the tornado crossed I-71, it began to weaken and lift as damage became lighter and more intermittent, consisting of tree and minor structural damage to roofing materials. Still, many homes immediately east of I-71 suffered at least minor damage and/or tree damage before the tornado lifted.

Thunderstorm Wind in FRANKLIN, OHIO
From 03-APR-18 16:38:00 to 03-APR-18 16:48:00 (EST-5)
Location: HANFORD
Magnitude: 50.00 EG
Property damage: 30.00K
Crop damage: 0.00K
Reported by: Public

A significant part of a building's roof was blown off, with slate tiles embedded in the ground 6 inches. Also, a couple of other homes had chimneys collapse.

Hail in BROWN, OHIO
From 03-APR-18 17:25:00 to 03-APR-18 17:30:00 (EST-5)
Location: ARNHEIM
Magnitude: 0.88 
Property damage: 0.00K
Crop damage: 0.00K
Reported by: Amateur Radio

Nickel sized hail was covering the ground at Lake Waynoka.