A warm front lifted north into northern Ohio causing showers and thunderstorms to develop. A couple of the thunderstorms became severe and produced some storm damage.
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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 CLE wrote it up.
A warm front lifted north into northern Ohio causing showers and thunderstorms to develop. A couple of the thunderstorms became severe and produced some storm damage.
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 Cleveland, OH wrote its last area forecast discussion before the first event at Aug 10, 12:27 PM EST, 1 hour 31 minutes earlier.
Area Forecast Discussion National Weather Service Cleveland OH 127 PM EDT Fri Aug 10 2018 .SYNOPSIS... A cold front will cross the area between today and Saturday. An upper low will be across the region Sunday and Monday. The next weather system will be around for Thursday and Friday. && .NEAR TERM /THROUGH SATURDAY/... Showers and thunderstorms continue to develop from Ottawa county southeast toward Akron-Canton. This trend will continue through the afternoon and spread slowly south. Lake shadow is developing now and should keep convection from developing near the lakeshore further east or over the lake. Northeast Ohio and northwest Pennsylvania should remain quiet through the afternoon as well. Previous Discussion... No changes to the forecast with this early morning update. Parts of the area are within/near both the SPC Marginal Risk for severe and the WPC Marginal Excessive rain. Shear is really lacking. PWs will remain shy of 2 inches, but storm motions will be 10 knots or less. Much of that area could use rain too. So risk is minimal. Front has reached the lakeshore with BKL and Walnut Creek beach buoy with northeast winds. Previous discussion...One can pick out the front laying along the long axis of the lake early this morning with a wind shift to the northeast north of the front. A couple of weak waves of low pressure will work along the front today as it slowly presses onshore and makes it toward the US 30 corridor. Will continue to have the gradient in precip chances from north to south; with the highest chances south of US 30. Did increase PoPs to likely from Marion to Mt Vernon where instability should be best. Guidance temperatures clustered close together, but went a degree or two higher as guidance has been running a touch cool and neutral temp advection with this front. Precip chances/coverage diminishes with loss of heating for tonight, but maintain some PoPs through the night with the front in the vicinity of the southern counties. A narrow window exists Saturday across the far south when redevelopment of showers/thunderstorms would take place before the front sinks further southward. Lows and highs will continue to be similar to recent past and climatology. && .SHORT TERM /SATURDAY NIGHT THROUGH MONDAY NIGHT/... The new guidance coming in still shows a cutoff upper low developing over the area on Sunday. However...things appear to be changing at the surface with the low development now east of the area. This keeps the brunt of the precip east of the local area and have had to make some changes to the forecast. Have backed off on precip chances most of the period and have actually gone dry for a couple periods in the west. I would not be surprised if the I-75 corridor remains dry the entire short term period. The 00z ECMWF is showing moisture rotating around the low and into NW OH on Monday so have left a small chance in for continuity. Even at the east end of the area precip coverage will likely be no more than scattered with best chances perhaps on Monday. Given the further east location of the surface low some drier air may be able to filter into the region. Have gone ahead and lowered low temps a degree or two. Highs during the period will be near normal. && .LONG TERM /TUESDAY THROUGH THURSDAY/... The upper low is forecast to finally exit to the northeast on Tuesday. The GFS is a little faster than the new ECMWF. Will trend toward the slower solution which means there could be some lingering precip in the east on Tuesday. Will however dry out all areas Tuesday night. The models are still hinting at another wave arriving on Wednesday so will introduce more precip chances during the day. This system seems a little more vigorous than recent storms and we could end up seeing widespread rainfall. However...given recent model inconsistencies will keep the precip mention in the chance category for now. No big warm up or cool down is expected and high temperatures will continue to average near normal. && .AVIATION /18Z Friday THROUGH Wednesday/... Showers and thunderstorms continue to develop from just west of Cleveland toward the Akron-Canton area. This activity will continue to develop through the afternoon and move south and southeast. Erie and Youngstown should remain free of the activity at this time. Thunderstorms have the potential to produce gusts to 35 to 40 knots and heavy rain. Expecting VFR overnight into tomorrow with winds returning to light and variable. OUTLOOK...Non-VFR possible through Monday and possibly Wednesday. && .MARINE... A cold front over the lake will push south of the lake early this morning. The flow will become northeast behind the front. Northeast flow will then continue through at least Monday. Speeds most of the time will be in the 10 to 15 knot range and am not expecting small craft conditions. A weak ridge will try to move across the lake on Tuesday which will finally return the flow to the west or southwest. && .CLE WATCHES/WARNINGS/ADVISORIES... OH...None. PA...None. MARINE...None. && SYNOPSIS...Oudeman NEAR TERM...Lombardy/Oudeman SHORT TERM...Kubina LONG TERM...Kubina AVIATION...Lombardy MARINE...Kubina
Hazardous Weather Outlook National Weather Service Cleveland OH 400 AM EDT Fri Aug 10 2018 LEZ061-142>149-162>169-OHZ003-006>014-017>023-027>033-036>038-047- 089-PAZ001>003-111100- Lake Erie open waters from Ripley to Buffalo NY- Lake Erie nearshore waters from Maumee Bay to Reno Beach OH- Lake Erie nearshore waters from Reno Beach to The Islands OH- Lake Erie nearshore waters from The Islands to Vermilion OH- Lake Erie nearshore waters from Vermilion to Avon Point OH- Lake Erie nearshore waters from Avon Point to Willowick OH- Lake Erie nearshore waters from Willowick to Geneva-on-the Lake OH- Lake Erie nearshore waters from Geneva-on-the-Lake to Conneaut OH- Lake Erie nearshore waters from Conneaut OH to Ripley NY- Lake Erie open waters from Maumee Bay to Reno Beach OH- Lake Erie open waters from Reno Beach to The Islands OH- Lake Erie open waters from The Islands to Vermilion OH- Lake Erie open waters from Vermilion to Avon Point OH- Lake Erie open waters from Avon Point to Willowick OH- Lake Erie open waters from Willowick to Geneva-on-the-Lake OH- Lake Erie open waters from Geneva-on-the-Lake to Conneaut OH- Lake Erie open waters from Conneaut OH to Ripley NY-Lucas-Wood- Ottawa-Sandusky-Erie-Lorain-Cuyahoga-Lake-Geauga-Ashtabula Inland- Hancock-Seneca-Huron-Medina-Summit-Portage-Trumbull-Wyandot-Crawford- Richland-Ashland-Wayne-Stark-Mahoning-Marion-Morrow-Holmes-Knox- Ashtabula Lakeshore-Northern Erie-Southern Erie- 400 AM EDT Fri Aug 10 2018 This Hazardous Weather Outlook is for Lake Erie, north central Ohio, northeast Ohio, northwest Ohio and northwest Pennsylvania. .DAY ONE...Today and Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Saturday through Thursday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
Special Weather Statement
National Weather Service Cleveland OH
220 PM EDT FRI AUG 10 2018
OHZ010-019-020-028>031-101900-
Crawford-Huron-Richland-Medina-Lorain-Ashland-Wayne-
220 PM EDT FRI AUG 10 2018
...SCATTERED STRONG THUNDERSTORMS WILL AFFECT SOUTHERN HURON...
RICHLAND...SOUTHWESTERN MEDINA...ASHLAND...WESTERN WAYNE...
NORTHEASTERN CRAWFORD AND SOUTHWESTERN LORAIN COUNTIES...
At 218 PM EDT, radar indicated strong thunderstorms scattered along
a line extending from near West Salem to near Shelby to near New
Washington. Movement was east at 15 mph.
Wind gusts up to 50 mph are possible with these storms.
Torrential rainfall is also occurring with these storms, and may
cause localized flooding. Do not drive your vehicle through flooded
roadways.
These storms may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
LAT...LON 4072 8272 4087 8287 4109 8281 4114 8217
4099 8169 4081 8195 4067 8212
TIME...MOT...LOC 1818Z 291DEG 12KT 4103 8215 4091 8259 4092 8282The Cleveland radar (KCLE), 39 km away, was scanning. The volume nearest the first event began at 18:59 UTC.
2 thunderstorm wind, 1 flash flood. Local standard time, as filed.
Thunderstorm winds downed a tree near the intersection of State Routes 21 and 162.
Thunderstorm winds downed two trees west of Berlin along County Road 201.
Two rounds of thunderstorms moved into the Boardman areas of Mahoning County, one around 430 PM and the second around 530 PM. The intensity of the first storm caused immediate runoff in the area. This resulted in nuisance flooding of low lying and poor drainage areas. However the second storm exasperated flooding and elevating the severity almost instantaneously. The storm total rainfall was around 4 to 6 inches over about a 60-90 min period. In all 238 homes were affected, 101 had minor damage, 1 had major damage, and 4 were destroyed. The severe flooding impacts occurred around 515 PM to 530 PM and continued through the evening.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2018Every state in 2018This day in weather historyWarnings in Ohio, August 2018
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: 777283, 777284, 778808.