Isolated thunderstorms developed during the evening of September 5th. Downburst wind gusts of at least 60 mph caused damage in Medina and Cuyahoga Counties.
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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.
Isolated thunderstorms developed during the evening of September 5th. Downburst wind gusts of at least 60 mph caused damage in Medina and Cuyahoga Counties.
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 Sep 5, 5:29 PM EST, 0 minutes earlier.
Area Forecast Discussion National Weather Service Cleveland OH 629 PM EDT Wed Sep 5 2018 .SYNOPSIS... Low pressure will move across Quebec tonight with a cold front sagging southward through the central Great Lakes. This cold front will move southward across the region on Thursday, reaching central Ohio by late afternoon. The front will stall across near the Ohio River Valley then lift back to the north as the remnants of Tropical Storm Gordon approach the area. && .NEAR TERM /THROUGH THURSDAY NIGHT/... Bumped up pops to scattered North Central Ohio for this evening. Original discussion... Low pressure will move across Quebec tonight with a cold front sagging southward through the central Great Lakes. This cold front will move southward across the region on Thursday, reaching central Ohio by late afternoon. For the remainder of this evening there will be isolated thunderstorms. The exception looks to be the Mid Ohio region where a slightly better plume of moisture and a piece of 5H jet energy interact to generate scattered thunderstorms. This piece of jet energy moving northward overnight may keep a few thunderstorms going across the eastern half of the region. We will also have to monitor along the cold front for additional development. Anything that does develop along the front will drift southward and clear the region by late afternoon/early evening. One more humid night tonight then gradually drying out through the Thursday evening. It will be cooler on Thursday with the frontal passage and additional cloud cover. Highs should range from the mid to upper 70s near the lakeshore to the lower 80s south. Temperatures Thursday night will remain above seasonal averages with middle 60s common. Slightly warmer near the lakeshore. && .SHORT TERM /FRIDAY THROUGH SATURDAY NIGHT/... Upper level ridge is expected to build to the lee of the Rocky Mountains by the early part of the weekend. The ridge has a potential to have an impact on where the tropical remnants tracks. Strong surface high pressure building south out of northern Ontario, Canada will push dry air into the region during the early part of the forecast period. Expecting there to be a sharp cutoff between rain and no rain over Ohio and Pennsylvania Friday and Saturday. The high pressure will then shift slowly east allowing remnants to move east into Ohio by Sunday morning. The gradient between the two systems will tighten over the eastern third of the forecast area with winds pushing 15 to 25 knots. Rest of the area will see lighter winds closer to the center of circulation. Abundant tropical moisture will begin to surge north with the system as well and the best chance for any rain appears it will arrive Sunday morning. Instability does not look that impressive and should remain stable enough to only support showers with the system as it moves into the region. Temperatures will be considerably cooler over the weekend with the threat for the showers and cloud cover. Cool air advection from the effects of the high pressure to the north will aid in keeping cool air in place as well. Some slightly warmer air will arrive Sunday as tropical air arrives with the remnant system. && .LONG TERM /SUNDAY THROUGH WEDNESDAY/... The long term begins Sunday night with models in agreement showing low pressure just to our west, the remnants of Gordon. The GFS has the low from Central Indiana to northwest OH while the ECMWF is centered in eastern IL. Either way, deep moisture will be across the region with it's origin in the tropics. Will begin with categorical pops across the entire area and then drop pops to chance/likely west/central. Monday the low will track northeast across the central Great Lakes taking much of the tropical moisture with it. Will need to continue with likely pops east for lingering showers but will drop to chance elsewhere. Tuesday will be dry as both the GFS and ECMWF bring high pressure and drier air in from the west. Wednesday the high will move to eastern Quebec but should extend a ridge west across the central lakes into the Mississippi Valley. Should be a decent day but the resultant easterly gradient will bring enough moisture back into the area from the east. Will therefor need a slight chance pop east and central counties. && .AVIATION /18Z Wednesday THROUGH Monday/... Scattered -tsra North Central Ohio will gradually diminish this evening. Expect more scattered convection after midnight ahead of approaching cold front that will move across forecast area tomorrow. OUTLOOK...Non-VFR possible late Saturday night into Sunday in showers and isolated thunderstorms. && .MARINE... Winds on the lake expected to be relatively light this evening. A northerly flow will develop late tonight as a cold front slips south across the area. As high pressure builds slowly east across Ontario, Canada, the remnant tropical system will slowly push into Ohio and Pennsylvania. The two systems will increase the gradient over the lake and winds will become gusty Saturday evening into Sunday night. Sustained winds 25 to 30 knots will not be out of the question and possibly higher depending on the track of the remnant low pressure system. Winds do shift around to the and begin to diminish Monday behind the storm system. && .CLE WATCHES/WARNINGS/ADVISORIES... OH...None. PA...None. MARINE...None. && SYNOPSIS...Mullen NEAR TERM...DJB SHORT TERM...Lombardy LONG TERM...TK AVIATION...DJB MARINE...Lombardy
Hazardous Weather Outlook National Weather Service Cleveland OH 554 AM EDT Wed Sep 5 2018 OHZ003-006>014-017>023-027>033-036>038-047-089-PAZ001>003-061000- 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- 554 AM EDT Wed Sep 5 2018 This Hazardous Weather Outlook is for north central Ohio, northeast Ohio, northwest Ohio and northwest Pennsylvania. .DAY ONE...Today and Tonight. One more hot and humid day expected today before a cold front comes through late tonight. Heat index values will range from the mid 90s to near 100 degrees today, mainly during the afternoon hours. Take precautions to avoid strenuous outdoor activities and heat related illnesses. Isolated to scattered thunderstorms are possible this afternoon and evening. The strongest thunderstorms that develop could produce locally heavy rainfall and gusty winds as they collapse. Isolated strong to severe wind gusts are possible, mainly from 3 PM to 9 PM. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. LEZ061-142>149-162>169-061000- 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- 554 AM EDT Wed Sep 5 2018 This Hazardous Weather Outlook is for Lake Erie. .DAY ONE...Today and Tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The Cleveland radar (KCLE), 20 km away, was scanning. The volume nearest the first event began at 22:28 UTC.
6 thunderstorm wind. Local standard time, as filed.
Thunderstorm winds downed a tree and some power lines near the intersection of Jefferson Avenue and Wilson Street.
Thunderstorm wind gusts downed a few trees in Rocky River. Power lines were also downed resulting in some power outages.
Thunderstorm winds damaged the roof of a commercial building on Broadview Road south of Brookpark Road.
Thunderstorm winds downed trees and power lines on West 11th and 12th Streets. Another tree was downed on Panna Lane.
Thunderstorm winds downed a tree on Genesee Avenue.
Thunderstorm downburst wind gusts of at least 60 mph downed at least trees in the Liverpool Township and Valley City areas. Trees were reported downed at residences on Columbia, Neff and Law Roads.
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, September 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: 778496, 778493, 778494, 778495, 778497, 778492.