Northeast Ohio resided in the warm sector during the late morning through afternoon of June 7th as a Bermuda High resulted in a southerly low-level return flow of warm and humid air from the Gulf of Mexico. Within this low-level flow, a very weak surface trough rippled northward through Ohio.
Every event with a place to put it. Tap one for its entry below.
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.
Northeast Ohio resided in the warm sector during the late morning through afternoon of June 7th as a Bermuda High resulted in a southerly low-level return flow of warm and humid air from the Gulf of Mexico. Within this low-level flow, a very weak surface trough rippled northward through Ohio. Low-level convergence along the trough axis contributed to scattered shower and thunderstorm development amidst modest vertical wind shear, moderate instability, weak DCAPE, and steep low-level lapse rates near 7C/km. One multicell thunderstorm cluster produced a downburst near Lake Milton in northwest Mahoning County.
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 7, 12:50 PM EST, 35 minutes earlier.
Area Forecast Discussion National Weather Service Cleveland OH 150 PM EDT Mon Jun 7 2021 .SYNOPSIS... Large scale upper ridging will persist over the eastern United States early this week, while a cutoff upper low slowly moves from the Missouri Valley to the Great Lakes region through midweek. && .NEAR TERM /THROUGH TUESDAY/... Main show for today continues to be this swath of rain entering the Cleveland and Akron metros this afternoon. Rain become more scattered by Toledo but this area entering northeast Ohio is maintaining quite well and will continue moving northeast into Youngstown and eventually Erie. The leading edge of this rain has allowed for some brief gusty winds and have a brief statement for this area southeast of Cleveland/northeast of Akron. Original discussion... The near term period will see continued upper ridging over the region, with increasing heat and humidity with ample Gulf return into the region. Cutoff upper low over Missouri will slowly rotate northeastward towards the Great Lakes through Tuesday. Currently focused on precip activity near the Ohio River valley, which hi-res guidance suggests may be the activity that next affects the local area this afternoon as a weak surface trough lifts north into the area. Model guidance has been inconsistent between models and run to run with the evolution of the convection through the day as modest MLCAPE values of 500-1000 j/kg develop/advect northward into the area through this afternoon. Have opted for mainly mid/high chance pops for today with the modest instability and lack of strong forcing. Any storms that do develop have the potential to produce heavy rainfall with slow storm motions, PWAT values pushing 2 inches by this afternoon, deep warm cloud depths up to 12kft, and a long/skinny CAPE profile allowing for efficient warm rain processes. Precip chances steadily decrease this evening into tonight with the loss of diurnal heating, but it's lather, rise, repeat for Tuesday across the area. Convection chances ramp up through the day again as slightly better MLCAPE develops across the area in the 800-1200 j/kg range. The only difference with the pattern is a bit more veered boundary layer flow, drier air at 500 mb and above, and a bit less low level forcing. The exception with respect to forcing is a weak lake boundary that is expected to push several miles inland east of Cleveland Tuesday afternoon, which may be a focus for more widespread convection, and have reflected this with likely pops. Otherwise, opted for high chance pops again peaking Tuesday afternoon. Highs today will be a touch cooler than the previous two days with more cloud cover and potential showers, with low to mid 80s expected. Highs Tuesday may be similar, but perhaps a few degrees warmer across the western half of the area. && .SHORT TERM /TUESDAY NIGHT THROUGH THURSDAY NIGHT/... Weak surface low pressure centered over the northern Great Lakes and the associated weak upper level cut off low will continue to bring the chance of showers and thunderstorms through the short term period. The positioning of the upper level system will allow the area to remain on the fringe between the weak trough and ridge, resulting in a sustained southwesterly wind across the area. This will allow for moisture values to remain elevated. The biggest uncertainty for this period is whether or not a frontal boundary north of the area will shift far enough south to impact the CWA. Opted to keep forecast similar to previous forecasts with a higher chance of convection occurring during the diurnal cycle on Wednesday and Thursday. If the frontal boundary moves further south to impact the area, the chance of showers and thunderstorms will increase with the additional forcing, however confidence in this happening is low. High temperatures through the period will be in the mid 80s, but with high humidity values, the feel like temperature will be a bit warmer. Overnight lows will be in the upper 60s. && .LONG TERM /FRIDAY THROUGH SUNDAY/... The beginning of the long term period remains similar to the short term with chance of diurnal driven showers and thunderstorms in the afternoon on Friday. Models suggest that the persistent ridge finally begins to break down by the beginning of next week as an amplified trough begins to dig south from Canada. Timing and the amplitude of the trough vary between models so confidence in the resultant precipitation is low at this point. One thing to note with this change in the pattern is the northwesterly flow regime that is established over the area by the late weekend into early next week. This type of pattern suggests a possible shift to an active weather pattern over the area. High temperatures are not expected to vary much through the period, reaching the mid 80s. Overnight lows are also expected to persist in the low to mid 60s. && .AVIATION /18Z Monday THROUGH Saturday/... Scattered showers and thunderstorms have developed as expected this afternoon with the main show moving through KCLE and KCAK at TAF issuance, moving northeast towards KYNG and KERI. Convection isn't intense with strong winds or frequent lightning, but there is enough instability to support a rumble or two to allow for a TS mention at these terminals. Behind this complex, shower activity will become widely scattered and remains tough to say if rain will hit a particular terminal or not through sunset and have maintained some vicinity mentions at all terminals. Increased low level moisture across the region will allow for low ceilings on Tuesday morning and have MVFR mentions for most. Heat and humidity will allow for more diurnally driven convection on Tuesday, especially during the afternoon hours and have a vicinity shower mention at KCLE for the end of the longer TAF. Outlook...Non-VFR possible Tuesday through Thursday in showers and thunderstorms. && .MARINE... A south to southwesterly flow of 5 to 10 knots is expected to persist through mid week, allowing the waters to remain rather calm with waves 2 feet or less. Although the overall marine conditions will be quiet, the current meteorological set up is conducive to diurnal convection occurring, which can be hazardous to beachgoers and mariners. A weak lakeshore breeze is possible during this period, however it should remain relatively weak. Confidence in the forecast remains low for the end of the week as a potential frontal boundary moves south across Lake Erie, which would result in an increase in winds and waves across the lake. However, some models suggest this boundary staying north of the area, which would result in a similar pattern to the beginning of the week. This system for the second half of the week will need to continue to be monitored as this would be the next potential time frame for any marine headlines. && .CLE WATCHES/WARNINGS/ADVISORIES... OH...None. PA...None. MARINE...None. && SYNOPSIS...Greenawalt NEAR TERM...Greenawalt/Sefcovic SHORT TERM...Campbell LONG TERM...Campbell AVIATION...Sefcovic MARINE...Campbell
Hazardous Weather Outlook National Weather Service Cleveland OH 511 AM EDT Mon Jun 7 2021 LEZ061-142>149-162>169-OHZ003-006>014-017>023-027>033-036>038-047- 089-PAZ001>003-080915- Ripley to Buffalo NY extending from 5NM off shoreline to US- Canadian border-Maumee Bay to Reno Beach OH- Reno Beach to The Islands OH-The Islands to Vermilion OH- Vermilion to Avon Point OH-Avon Point to Willowick OH- Willowick to Geneva-on-the Lake OH-Geneva-on-the-Lake to Conneaut OH- Conneaut OH to Ripley NY- Detroit River Lt. to Maumee Bay OH to Reno Beach OH beyond 5NM offshoreline to US-Canadian border- Reno Beach to The Islands OH beyond 5NM off shoreline to US- Canadian border- The Islands to Vermilion OH beyond 5 nm off shoreline to US- Canadian border- Vermilion to Avon Point OH beyond 5 nm off shoreline to US- Canadian border- Avon Point to Willowick OH beyond 5 nm off shoreline to US- Canadian border-Willowick to Geneva-on-the- Lake OH beyond 5NM off shoreline to US-Canadian border-Geneva-on-the- Lake to Conneaut OH beyond 5 nm off shoreline to US-Canadian border- Conneaut OH to Ripley NY beyond 5 nm off shoreline to US- Canadian border-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- 511 AM EDT Mon Jun 7 2021 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...Tuesday through Sunday. 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
128 PM EDT Mon Jun 7 2021
OHZ011>013-021-022-071800-
Summit-Geauga-Portage-Lake-Cuyahoga-
128 PM EDT Mon Jun 7 2021
...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHERN PORTAGE...
SOUTHERN GEAUGA...EASTERN CUYAHOGA...SOUTHWESTERN LAKE AND
NORTHEASTERN SUMMIT COUNTIES...
At 128 PM EDT, radar indicated strong thunderstorms were located
along a line extending from near Cleveland to Streetsboro. Movement
was northeast at 30 mph.
Winds in excess of 40 mph are possible with these storms.
Locations impacted include...
Cleveland, Willowick, Ravenna, Parma, Euclid, Mentor, Cleveland
Heights, Kent, Solon, Willoughby, Hudson, Twinsburg, Eastlake,
Streetsboro, Warrensville Heights, Macedonia, South Russell,
Middlefield, Garrettsville and Burton.
LAT...LON 4140 8100 4132 8100 4113 8131 4138 8174
4159 8157 4162 8153 4162 8150 4168 8143
TIME...MOT...LOC 1728Z 217DEG 27KT 4142 8162 4123 8131
SaundersThe Cleveland radar (KCLE), 82 km away, was scanning. The volume nearest the first event began at 18:24 UTC.
1 thunderstorm wind. Local standard time, as filed.
Power pole snapped along Northeast River Road on the east side of Lake Milton, about 1/4 mile north of Milton Road. Apparent downburst.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2021Every state in 2021This day in weather historyWarnings in Ohio, June 2021
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: 953255.