A stationary front lingered along the US 30 corridor in northern Ohio. Afternoon and early evening thunderstorm development occurred along and near the front.
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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 stationary front lingered along the US 30 corridor in northern Ohio. Afternoon and early evening thunderstorm development occurred along and near the front. Some storms produced heavy rainfall and isolated minor flooding. There were also reports of damaging wind gusts and quarter-size hail.
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 Jun 4, 9:37 AM EST, 2 hours 55 minutes earlier.
Area Forecast Discussion National Weather Service Cleveland OH 1037 AM EDT Thu Jun 4 2020 .SYNOPSIS... A stationary front will be located across central Ohio through much of the day today before lifting north by Thursday night. On Friday, a cold front will move southeast across the region as low pressure moves from southern Ontario into Quebec. High pressure will build south across the Great lakes through the weekend. && .NEAR TERM /THROUGH FRIDAY/... Minor adjustments to pops and sky cover this morning into the afternoon, otherwise the forecast is on track. Will continue to monitor severe potential throughout the day, with expected destabilization across the southeast part of the forecast area over the next several hours. Hi-res models continue to hone in on a similar solution of rapid convective development around 2 PM, with the potential for organization and at least a brief severe threat along and east of the I-71 corridor into the evening. Original Discussion...Mostly quiet weather is expected through the morning as temperatures slowly rise to the low 80s by the early afternoon under mostly cloudy skies. Convection will initiate around 18Z later today as MLCAPE reaches 1500 to 2000 J/kg and the surface cap erodes. A subtle 30 knot 850 mb jet appears to develop across the Ohio Valley coincident or just proceeding convective initiation, enhancing effective shear values near 25 to 30 knots. This would support at least somewhat organized multicells with the primary hazard being damaging wind gusts associated with wet microbursts. DCAPEs will reach the near 1000s J/kg with PWATs around 1.8s and large theta-e differences which will be supportive of water-loaded downdrafts. Isolated pockets of up to 1 inch hail are also possible with EL's expected to reach near 200 mb and lapse rates ~6 C/km, though melting will be an issue with high low level layer RH and wet bulb zero heights around 10,000 ft. This thunderstorm activity is expected to diminish around the late evening hours (between 0-3Z) with the highest confidence and therefore likely PoPs in an axis extending from Mansfield towards Youngstown. By Friday, the stationary front will have lifted north of the area while a weak cold front approaches the area from the west. Another round of thunderstorms ahead of this front will be possible Friday, though not anticipating much in the way of severe weather with effective shear under 20 knots and limited moisture associated with the front. Highs on Friday will mostly be in the low to mid 80s, though some upper 80s could be seen across NW OH as dry air behind the front would allow for clearing. && .SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY NIGHT/... The short term forecast period begins on Friday night with an upper trough axis north of the forecast area that will push east of the area, bringing a surface cold front through the area. There appears to be enough moisture and instability ahead of this front for scattered showers and thunderstorms to be present over the region into Friday evening, tapering quickly with the cold frontal passage. Temperatures on Friday night will stay in the low to mid 60s over the region, as the better cold air advection waits until Saturday. The weekend forecast appears both quiet and Spring-like over the area. High pressure will build in from the northwest over the course of the weekend as an upper ridge strengthens to the west. This should allow for dry conditions across the forecast area. Temperatures will modify a bit on Saturday with highs in the 70s to lower 80s. A better cold air advection push will occur on Saturday night into Sunday as the surface low moves north of the area and north to northeast flow allows for some cooler air aloft to enter the region. Have Sunday temperatures in the 60s to lower 70s across the area, or a several degrees below normal for the first weekend of June. && .LONG TERM /MONDAY THROUGH WEDNESDAY/... The long term forecast period looks to begin fairly quiet on Monday as the area remains under the influence of high pressure. The strengthening upper ridge to the west of the region will move overhead and nudge the surface high east, allowing for warmer air to enter the region. Therefore, have temperatures recovering into the 70s to lower 80s. The pattern for Tuesday into Wednesday becomes a bit more uncertain as they depend greatly on the track of Tropical Storm Cristobal, which is expected to land on the Gulf Coast on Monday. The remnant system will track towards the area next week and will bring the next significant chance for wet weather. Given timing and track uncertainty, will cap at 40 percent PoPs for now with warming temperatures. && .AVIATION /12Z Thursday THROUGH Monday/... Mainly VFR conditions across the TAF sites this morning with a brief MVFR visbys noted at FDY due to rain showers and some passing thunder. Can't rule out a brief MVFR visbys due to rain at MFD in the next hour or two. Otherwise, focus will turn to thunderstorm activity later this afternoon, with tsra mention at CAK/YNG/ERI, mainly between 18 and 21Z. Elsewhere, vcts mention is noted at MFD and CLE for 18 through 21Z. There are some vague hints at some patchy fog potential later tonight into early Friday morning so have mentioned some sct030 at where precipitation confidence is higher. Winds will be generally light out of the south, under 10 knots today. Winds and wind gusts will be higher in or near thunderstorms this afternoon. Outlook ...Non-VFR possible Friday night with a cold front. && .MARINE... A stalled frontal boundary south of Lake Erie will allow for light flow over the lake today and tonight. Shower and thunderstorm activity is expected to develop along the front today and scattered activity could spread over the lake. Additional shower and thunderstorm activity is possible on Friday as a cold front approaches from the northwest and will cross the lake on Friday night. High pressure builds from the northwest for the weekend and north to northeast winds will be present over the lake. Generally light flow should allow for waves to remain minor for the nearshore zones. High pressure gets nudged eastward on Monday and flow will become more easterly, but still light enough to avoid any marine concerns. In summary, at this time, no marine headlines are expected through early next week. && .CLE WATCHES/WARNINGS/ADVISORIES... OH...None. PA...None. MARINE...None. && SYNOPSIS...Kahn NEAR TERM...Greenawalt/Kahn SHORT TERM...Sefcovic LONG TERM...Sefcovic AVIATION...Kahn MARINE...Sefcovic
Hazardous Weather Outlook National Weather Service Cleveland OH 114 PM EDT Thu Jun 4 2020 OHZ029>033-037-038-047-051715- Richland-Ashland-Wayne-Stark-Mahoning-Morrow-Holmes-Knox- 114 PM EDT Thu Jun 4 2020 ...SEVERE THUNDERSTORM WATCH 249 IN EFFECT UNTIL 8 PM EDT THIS EVENING... This Hazardous Weather Outlook is for north central Ohio and northeast Ohio. .DAY ONE...This afternoon and tonight. Please listen to NOAA Weather Radio or go to weather.gov on the Internet for more information about the following hazards. Severe Thunderstorm Watch. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. Hazardous weather is not expected at this time. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions according to Standard Operating Procedures. Please relay any information about observed severe weather to the NWS while following all local, state, and CDC guidelines. LEZ061-142>149-162>169-051715- 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- 114 PM EDT Thu Jun 4 2020 This Hazardous Weather Outlook is for central Lake Erie, eastern Lake Erie and western Lake Erie. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time. OHZ003-006>014-017>023-027-028-036-089-PAZ001>003-051715- Lucas-Wood-Ottawa-Sandusky-Erie-Lorain-Cuyahoga-Lake-Geauga- Ashtabula Inland-Hancock-Seneca-Huron-Medina-Summit-Portage-Trumbull- Wyandot-Crawford-Marion-Ashtabula Lakeshore-Northern Erie- Southern Erie- 114 PM EDT Thu Jun 4 2020 This Hazardous Weather Outlook is for north central Ohio, northeast Ohio, northwest Ohio and northwest Pennsylvania. .DAY ONE...This afternoon and tonight. No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...Friday through Wednesday. No hazardous weather is expected at this time. .SPOTTER INFORMATION STATEMENT... Spotter activation is not expected at this time.
The Cleveland radar (KCLE), 127 km away, was scanning. The volume nearest the first event began at 17:32 UTC.
3 thunderstorm wind, 2 hail, 2 flood. Local standard time, as filed.
Scattered downed trees and power lines across the southern-half of Knox County. Law enforcement was unable to give specific times or locations. Thus, report time and location (3 miles SSE of Mount Vernon) were estimated via radar.
Numerous trees down in Glenmont. Several trees down two miles east of Killbuck.
Pea to quarter-size hail three miles WNW of Millersburg.
Quarter-size hail two miles NW of Canton.
Power poles and lines down two miles SSE of Perry Heights.
After receiving 1.85 of rain from thunderstorms, nuisance flooding developed across Stark County mainly in City of Canton. Some road closures include Belvidere or Avondale.
A cluster of thunderstorms with heavy rain moved over southern Mahoning County on the 4th. Rainfall estimates were between 1 and 2 inches, most of which fell between 3 and 345 PM. Minor flooding was reported across Southern Ave and in the Home Depot parking lot. Flooding was also reported on Indianola and Shields Roads.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2020Every state in 2020This day in weather historyWarnings in Ohio, June 2020
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: 894922, 894923, 894924, 894926, 894928, 890787, 890779.