A modestly unstable environment developed during the afternoon with MUCape values approaching 2000 J/KG and deep layer shear up to 45 knots. A strong shortwave disturbance approached from the west and helped develop convection.
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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 modestly unstable environment developed during the afternoon with MUCape values approaching 2000 J/KG and deep layer shear up to 45 knots. A strong shortwave disturbance approached from the west and helped develop convection. Scattered severe thunderstorms produced wind damage across northeast Ohio.
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 11, 12:45 PM EST, 26 minutes earlier.
Area Forecast Discussion National Weather Service Cleveland OH 145 PM EDT Wed Sep 11 2019 .SYNOPSIS... A cold front will approach the area from the north today and stall. The front will remain in the area Thursday before lifting north as a warm front on Friday. A cold front will follow from the west Friday afternoon and evening. High pressure will dominate on Saturday. && .NEAR TERM /THROUGH THURSDAY/... Clouds have thinned allowing for mostly sunny skies during the morning which has helped temperatures rise to near 90 in some locations. Will increase max temperatures a bit to reflect the very warm conditions. Cloudiness should increase over the next few hours as the convective temperature is reached. Max temperatures will range from the mid 80s near ERI to the lower 90s near CLE and the southern portion of the CWA. Latest run the HREF system has back off on convective development for the afternoon across the region. Will lower/delay POP increase a tad for the afternoon. Previous discussion: A warm and humid airmass resides over the area this morning with temperatures warming rapidly to the upper 70s to lower 80s with mainly scattered high and mid clouds. Morning soundings show 850 mb temperatures ranging from +19C over the southern part of the CWA to near 17C over Lake Erie. We can expect temperatures to be similar to yesterday and reach 85-90F in most locations. The consensus of the convection allowing models shows showers and thunderstorms developing around 17UTC-18UTC over the western part of the area and then progresses the activity east. Effective shear reaches 30-35 knots near the Lake Erie with weaker values to the south. This amount of shear should help organize and help sustain the convection and increase the potential for severe weather. SPC's outlook has included part of the TOL area in a slight risk for severe. PW values are near 1.6" with DCAPE not overly high which seems reasonable as the mid level dry layer is rather high this morning and near or just below 500 mb. With the expected convective development expected more toward the middle of the afternoon, POPs for this morning to midday have been lowered. Previous discussion...Followed the HRRR for precip timing today and favored the MET guidance vs the categorical GFS. For today, a cold front across the central lakes will drop south, onto Lake Erie and possibly into nern OH and nwrn PA by late afternoon. Models have the front stalling in northern Ohio tonight before lifting north as a warm front Friday. Don't think the front will be initially active through mid morning so will start out with a slight chance pop and work up to chance mid and late morning, all to cover any possible development. Believe most of the precip today will occur through the afternoon. Following the HRRR, have likely pops on a nw/se line from Wood county to Wayne county. Through the afternoon have tilted the line move nw/se and drifted it east reaching nern OH and nwrn PA by 00Z. Through the evening have lowered pops with diurnal trends, keeping a chance pop mainly nwrn pa northeast of the front. The front remains in the area Thursday. Low pressure will move into the upper midwest and should likely be a focus for convection while forcing should be weaker across the region as an upper short wave ridge moves across the area, so will have chance pops for the day. Highs mid to upper 80s today. Highs Thursday from the mid and upper 70s northeast to the mid 80s southwest. && .SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY NIGHT/... A weakening frontal boundary over the area Thursday night will occlude and lift north as strong low pressure tracks northeast across the northern Great Lakes, pushing a cold front east across the area late Friday and Friday night. Precip chances will increase across the area Friday into Friday night, with thunderstorms possible ahead of the cold front. The models are inconsistent with the timing of the front, with the GFS/GEM notably faster than the latest NAM/ECMWF. The front will clear the area to the east by Saturday morning, with dry conditions expected through Friday night. Highs on Friday will be in the mid to upper 80s across the area, but will retreat to the upper 70s to low 80s Saturday behind the relatively weak cold front. && .LONG TERM /SUNDAY THROUGH TUESDAY/... The long term period is characterized by a building upper ridge across the eastern CONUS early next week, with mainly dry conditions and few signals for appreciable precip forcing. A somewhat seasonably strong belt of westerlies across the northern tier into the Great Lakes Sunday into Monday may promote a few clusters of convection somewhere across the region, but confidence is too low for any forecast mention at this point. The GFS continues to be an outlier with the synoptic pattern during this period, so have opted for more of a GEM/ECMWF solution. Above normal temps are looking increasingly likely early next week, with low/mid 80s forecasted. && .AVIATION /18Z Wednesday THROUGH Monday/... Generally VFR conditions will continue into much of the afternoon as showers and thunderstorms develop and increase in coverage and intensity through 21 UTC. Cumulus field will increase and become broken as well. MVFR conditions will develop in the heavier downpours. Brief improvement can be expect early this evening but lower clouds and some fog may develop after midnight as the cold front to the north approaches from the north along with lingering moisture in the boundary layer. The boundary will sag south into northern Ohio and nw PA Thursday morning and bring IFR to MVFR cigs. .OUTLOOK...Non-VFR conditions possible in showers/thunderstorms Thursday through Saturday morning and again in showers next week Monday and Tuesday. && .MARINE... A frontal boundary will slowly sag south to the lake by tonight, with generally southwest flow through the day today over the lake. Winds will flip around to the northeast as the front moves down the lake late tonight through tomorrow. Strong northeast flow tomorrow afternoon/evening, with 20 kts expected, will likely prompt a small craft advisory during the afternoon/evening hours. Winds will decrease Thursday night into Friday morning, becoming more southerly as a warm front lifts back north across the lake. Another cold front will quickly follow, crossing the lake from west to east Friday night. High pressure will build across the Great Lakes through the rest of the weekend. && .CLE WATCHES/WARNINGS/ADVISORIES... OH...None. PA...None. MARINE...None. && SYNOPSIS...TK NEAR TERM...LaPlante SHORT TERM...Greenawalt LONG TERM...Greenawalt AVIATION...LaPlante MARINE...Greenawalt
Hazardous Weather Outlook National Weather Service Cleveland OH 1020 AM EDT Wed Sep 11 2019 LEZ061-142>149-162>169-OHZ003-006>014-017>023-027>033-036>038-047- 089-PAZ001>003-121430- 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- 1020 AM EDT Wed Sep 11 2019 This Hazardous Weather Outlook is for Lake Erie, north central Ohio, northeast Ohio, northwest Ohio and northwest Pennsylvania. .DAY ONE...Today and tonight. Scattered to numerous showers and thunderstorms are expected to develop toward the middle of the afternoon and persist into the evening. Storms may produce strong to perhaps damaging winds. .DAYS TWO THROUGH SEVEN...Thursday through Tuesday. The probability for widespread hazardous weather is low. .SPOTTER INFORMATION STATEMENT... Spotter activation may be needed late this afternoon.
Special Weather Statement
National Weather Service Cleveland OH
158 PM EDT Wed Sep 11 2019
OHZ021-022-111845-
Summit-Portage-
158 PM EDT Wed Sep 11 2019
...A STRONG THUNDERSTORM WILL AFFECT SOUTHWESTERN PORTAGE AND
SOUTHERN SUMMIT COUNTIES...
At 156 PM EDT, a strong thunderstorm was located over Akron, moving
northeast at 25 mph.
Wind gusts up to 50 mph and penny size hail are possible with this
storm.
Locations impacted include...
Akron, Ravenna, Kent, Barberton, Green, Hudson, Tallmadge,
Mogadore, Norton, Brimfield, Fairlawn, Randolph, Munroe Falls,
Lakemore, Atwater, Silver Lake and Brady Lake.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
LAT...LON 4096 8158 4110 8165 4128 8133 4102 8114
4099 8125 4099 8142 4094 8142
TIME...MOT...LOC 1756Z 242DEG 22KT 4105 8154
ClarkThe Cleveland radar (KCLE), 49 km away, was scanning. The volume nearest the first event began at 18:08 UTC.
4 thunderstorm wind. Local standard time, as filed.
Parts of an air conditioner blew off a rood near Grant Street in Akron.
Several large tree branches were blown down in Gustavus near State Route 193 and State Route 87.
A tree was blown down at Larson West Road and Gurdle Road.
A tree was blown down in Vernon Township.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Ohio in 2019Every state in 2019This day in weather historyWarnings in Ohio, September 2019
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: 850723, 850724, 850725, 850726.