July 20, 2023 Severe Weather

Overview

A potent upper-level trough swept east across the Upper Great Lakes, extending a cold front east through the area. Thunderstorms developed along a pre-frontal trough ahead of the cold front Thursday afternoon across portions of Michigan and Indiana, and continued southeastward across northern OH and Northwest Pennsylvania into the evening hours. The environment was favorable for severe weather, particularly damaging wind gusts and large hail, and was characterized by steep mid-level lapse rates greater than 7 C/km, strong instability greater than 2000 J/kg, and modest bulk shear of 35 to 40 knots. Significant hail (2 inches in diameter in Westlake, OH and Corry, PA) and wind gusts (81 mph wind gust at Fairport Harbor, OH) were reported during the course of the event, resulting in numerous storm damage reports across the area. Several storms exhibited strong rotation on radar, resulting in 4 tornado warnings during the course of the event. Torrential rainfall also accompanied severe thunderstorms, leading to pockets of rate-driven flash flooding, especially within the Cleveland Metro area.

GOES-16 "sandwich" satellite product (visible and infrared) with the Geostationary Lightning Mapper (GLM) flash extent density overlaid. This loop is from 2 PM to 11 PM on July 20, 2023.

Photos & Video


Quarter-sized hail from Avon, OH. (Trent Magill)	Large hail stones 2 inches or greater in Corry, PA. (Karalee Kemp)	Large hail stone around 2 inches in Corry, PA. (Mary Beth Otteni Brown)	Large hail stone around 2 inches in Corry, PA. (Mallory Whiteley)


Storms rolling in off of Lake Erie into Fairport Harbor, OH. (Aprell Burkey)	Shelf cloud picture from Medina, OH. (James Guilford)	Shelf cloud picture from Austintown, OH. (Bill Bartholomew)	Storm clouds rolling through Willoughby, OH. (Tom Allman)


Uprooted tree in Chagrin Falls, OH. (Melissa Keenan)	Storm damage in Macedonia, OH. (Brett Hanna)	Street flooding in Brookpark, OH. (Chuck Madison)	Hail accumulating on a roadway in Waterford, PA. (Larry Klick)

Radar

Radar loop from 3:40 PM to 9:40 PM EDT on July 20, 2023.

Storm Reports

Storm report map from July 20, 2023.

Public Information Statement

LSR Summary

736 
NOUS41 KCLE 211004
PNSCLE
OHZ003-006>014-017>023-027>033-036>038-047-089-PAZ001>003-212204-

Public Information Statement
National Weather Service Cleveland OH
604 AM EDT Fri Jul 21 2023

...HAIL REPORTS...

Location                     Size      Time/Date       Lat/Lon              
Corry                        2.00 in   0630 PM 07/20   41.93N/79.64W        
Westlake                     2.00 in   0705 PM 07/20   41.45N/81.93W        
1 W Parma                    1.75 in   0718 PM 07/20   41.38N/81.75W        
3 S Mckean                   1.50 in   0554 PM 07/20   41.96N/80.14W        
1 SSE Brooklyn               1.50 in   0720 PM 07/20   41.41N/81.74W        
Seven Hills                  1.50 in   0725 PM 07/20   41.39N/81.68W        
Seven Hills                  1.50 in   0745 PM 07/20   41.38N/81.68W        
7 NNE Oak Harbor             1.25 in   0540 PM 07/20   41.61N/83.11W        
1 WSW Bedford                1.25 in   0740 PM 07/20   41.39N/81.56W        
Erie                         1.00 in   0139 PM 07/20   42.13N/80.08W        
3 NNW Erie                   1.00 in   0145 PM 07/20   42.17N/80.11W        
1 ENE Girard                 1.00 in   0510 PM 07/20   42.01N/80.30W        
1 W Union City               1.00 in   0605 PM 07/20   41.90N/79.86W        
Elgin                        1.00 in   0615 PM 07/20   41.90N/79.74W        
7 NNE Oak Harbor             1.00 in   0539 PM 07/20   41.61N/83.11W        
Avon                         1.00 in   0656 PM 07/20   41.45N/82.02W        
1 WNW North Olmsted          1.00 in   0704 PM 07/20   41.42N/81.94W        
1 NW Westlake                1.00 in   0705 PM 07/20   41.47N/81.94W        
Brooklyn Heights             1.00 in   0726 PM 07/20   41.41N/81.66W        
1 ESE Parma                  1.00 in   0740 PM 07/20   41.37N/81.71W        
1 SE Parma                   1.00 in   0749 PM 07/20   41.37N/81.71W        
Girard                       0.88 in   0510 PM 07/20   42.00N/80.32W        
3 SW Erie                    0.50 in   0433 PM 07/20   42.10N/80.13W        

...HIGHEST WIND REPORTS...

Location                     Speed     Time/Date       Lat/Lon              
Fairport, OH                 81 MPH    0630 PM 07/20   41.76N/81.28W        
Fairport, OH                 65 MPH    0618 PM 07/20   41.76N/81.28W        
Toledo                       59 MPH    0618 PM 07/20   41.57N/83.48W        
Cleveland - Edgewater        58 MPH    0718 PM 07/20   41.50N/81.73W        
Fairport, OH                 56 MPH    0606 PM 07/20   41.76N/81.28W        
Cleveland                    56 MPH    0648 PM 07/20   41.52N/81.68W        
Conneaut Light               56 MPH    0623 PM 07/20   41.98N/80.56W        
9 NE Port Clinton            51 MPH    0600 PM 07/20   41.63N/82.84W        
Youngstown                   49 MPH    0749 PM 07/20   41.25N/80.67W        
4 NNE Lakewood               47 MPH    0700 PM 07/20   41.55N/81.77W        
13 NNW Bratenahl             45 MPH    0600 PM 07/20   41.73N/81.69W        

...PRECIPITATION REPORTS...

Location                     Amount    Time/Date       Lat/Lon              
1 SSW Seven Hills            3.00 in   0809 PM 07/20   41.36N/81.68W        
&&

**METADATA**
:7/20/2023,0809 PM, OH, Cuyahoga, 1 SSW Seven Hills, , , 41.3617, -81.6847, RAIN_24, 3, Inch, Trained Spotter, 24 hour rainfall,
:7/20/2023,0648 PM, OH, Cuyahoga, Cleveland, , , 41.52, -81.68, PKGUST, 56, mph, ASOS, Peak Wind Gust,
:7/20/2023,0606 PM, OH, Lake, Fairport, OH, , , 41.7598, -81.2811, PKGUST, 56, mph, NOS-NWLON, Peak Wind Gust,
:7/20/2023,0618 PM, OH, Lake, Fairport, OH, , , 41.7598, -81.2811, PKGUST, 65, mph, NOS-NWLON, Peak Wind Gust,
:7/20/2023,0630 PM, OH, Lake, Fairport, OH, , , 41.7598, -81.2811, PKGUST, 81, mph, NOS-NWLON, Peak Wind Gust,
:7/20/2023,0600 PM, OH, Ottawa, 9 NE Port Clinton, , , 41.629, -82.841, PKGUST, 51, mph, NDBC, Peak Wind Gust,
:7/20/2023,0749 PM, OH, Trumbull, Youngstown, , , 41.25, -80.6667, PKGUST, 49, mph, ASOS, Peak Wind Gust,
:7/20/2023,0618 PM, OH, Wood, Toledo, , , 41.5667, -83.4833, PKGUST, 59, mph, ASOS, Peak Wind Gust,

Observations are collected from a variety of sources with varying
equipment and exposures. We thank all volunteer weather observers 
for their dedication. Not all data listed are considered official.

$$

476 
NWUS51 KCLE 220251
LSRCLE

Preliminary Local Storm Report...Summary
National Weather Service Cleveland OH
1051 PM EDT Fri Jul 21 2023

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0139 PM     Hail             Erie                    42.13N 80.08W
07/20/2023  E1.00 inch       Erie               PA   Public           

            Various hail sizes from penny to quarter 
            size. 

0143 PM     Hail             3 E Erie                42.15N 80.03W
07/20/2023  E1.25 inch       Erie               PA   Public           

            -Delayed report- Video and photos of hail 
            approximately the size of half dollars 3 
            miles east of downtown Erie. 

0145 PM     Hail             3 NNW Erie              42.17N 80.11W
07/20/2023  E1.00 inch       Erie               PA   NWS Employee     

            Quarter Hail at Presque Isle State Park. 

0146 PM     Tstm Wnd Dmg     3 E Erie                42.15N 80.03W
07/20/2023                   Erie               PA   Public           

            -Delayed report- Multiple large trees downed 
            across road 3 miles east of downtown Erie. 

0433 PM     Hail             3 SW Erie               42.10N 80.13W
07/20/2023  E0.50 inch       Erie               PA   NWS Employee     

            Estimated half inch hail at Pittsburgh Ave 
            and W 26th Street in Erie. Time estimated 
            via radar. 

0510 PM     Hail             Girard                  42.00N 80.32W
07/20/2023  E0.88 inch       Erie               PA   Trained Spotter  

             

0510 PM     Hail             1 ENE Girard            42.01N 80.30W
07/20/2023  E1.00 inch       Erie               PA   Public           

            Report from mPING: Quarter (1.00 in.). 

0539 PM     Hail             7 NNE Oak Harbor        41.61N 83.11W
07/20/2023  E1.00 inch       Ottawa             OH   Public           

            Report from mPING: Quarter (1.00 in.) hail. 

0540 PM     Hail             7 NNE Oak Harbor        41.61N 83.11W
07/20/2023  E1.25 inch       Ottawa             OH   Public           

            Report from mPING: Half Dollar (1.25 in.) 
            hail. 

0545 PM     Tstm Wnd Dmg     7 WNW Marblehead        41.59N 82.84W
07/20/2023                   Ottawa             OH   Public           

            30 foot tall tree down on a house at Catawba 
            Point. 

0554 PM     Hail             3 S Mckean              41.96N 80.14W
07/20/2023  E1.50 inch       Erie               PA   Public           

             

0600 PM     Tstm Wnd Gst     9 NW Marblehead         41.63N 82.84W
07/20/2023  M51 MPH          Ottawa             OH   Mesonet          

            Mesonet station SBIO1 9 NE Port Clinton. 

0600 PM     Tstm Wnd Gst     13 NNW Bratenahl        41.73N 81.69W
07/20/2023  M45 MPH          LEZ166             OH   Mesonet          

            Mesonet station 45164 13 NNW Bratenahl. 

0605 PM     Hail             1 W Union City          41.90N 79.86W
07/20/2023  E1.00 inch       Erie               PA   911 Call Center  

             

0606 PM     Tstm Wnd Gst     1 NNW Fairport Harbor   41.76N 81.28W
07/20/2023  M56 MPH          Lake               OH   Buoy             

            Buoy station FAIO1 Fairport, OH. 

0615 PM     Hail             Elgin                   41.90N 79.74W
07/20/2023  E1.00 inch       Erie               PA   Trained Spotter  

            Hail damaged some vehicles and also tore off 
            window screens. 

0617 PM     Tstm Wnd Dmg     Stony Ridge             41.51N 83.51W
07/20/2023                   Wood               OH   911 Call Center  

            Tree limb and power line downed. Time 
            estimated via radar. 

0617 PM     Tstm Wnd Dmg     Mentor-on-the-Lake      41.72N 81.36W
07/20/2023                   Lake               OH   NWS Employee     

            -Delayed Report- Numerous reports from a 
            retired NWS employee, broadcast 
            meteorologist, and the public of widespread, 
            extensive tree and power-line damage in 
            Mentor-on-the-Lake. Outdoor structures were 
            damaged at Mentor Lagoons and some trees 
            fell on houses. 

0618 PM     Tstm Wnd Gst     1 SSE Walbridge         41.57N 83.48W
07/20/2023  M59 MPH          Wood               OH   ASOS             

            ASOS station KTDZ Toledo. 

0618 PM     Tstm Wnd Dmg     Mentor                  41.70N 81.33W
07/20/2023                   Lake               OH   Public           

            -Delayed Report- Two pictures received on 
            social media of a tree and large limb downed 
            on cars in separate residential driveways in 
            Mentor. 

0618 PM     Tstm Wnd Gst     1 NNW Fairport Harbor   41.76N 81.28W
07/20/2023  M65 MPH          Lake               OH   Buoy             

            Buoy station FAIO1 Fairport, OH. 

0618 PM     Tstm Wnd Dmg     1 NE Mentor-on-the-Lake 41.72N 81.36W
07/20/2023                   Lake               OH   Public           

            Power pole snapped and hit a car, large tree 
            branch on wires near the yacht club and 
            large tree uprooted. 

0623 PM     Tstm Wnd Gst     4 NNE Conneaut          41.98N 80.56W
07/20/2023  M56 MPH          LEZ149             OH   Mesonet          

            Mesonet station XCON Conneaut Light. 

0627 PM     Tstm Wnd Dmg     Fairport Harbor         41.76N 81.28W
07/20/2023                   Lake               OH   Public           

            -Delayed Report- Siding partially peeled off 
            the second story of a house in Fairport 
            Harbor. 

0627 PM     Tstm Wnd Dmg     1 NNW Fairport Harbor   41.76N 81.28W
07/20/2023                   Lake               OH   Public           

            Widespread tree damage in Fairport Harbor. 
            Time estimated via radar. 

0628 PM     Tstm Wnd Dmg     Painesville             41.72N 81.25W
07/20/2023                   Lake               OH   Public           

            -Delayed Report- Tree limbs downed in 
            Painesville. 

0630 PM     Hail             Corry                   41.93N 79.64W
07/20/2023  M2.00 inch       Erie               PA   Public           

            North side of Corry, PA. 

0630 PM     Tstm Wnd Gst     1 NNW Fairport Harbor   41.76N 81.28W
07/20/2023  M81 MPH          Lake               OH   Buoy             

            Buoy station FAIO1 Fairport, OH. 

0631 PM     Tstm Wnd Dmg     1 N Lorain              41.45N 82.18W
07/20/2023                   Lorain             OH   911 Call Center  

            Tree down on house. Time estimated from 
            radar. 

0632 PM     Tstm Wnd Dmg     Conneaut                41.94N 80.56W
07/20/2023                   Ashtabula          OH   Public           

            -Delayed Report- Multiple large limbs and 
            trees down in Conneaut, some onto roadways. 

0648 PM     Tstm Wnd Gst     3 N Cleveland           41.52N 81.68W
07/20/2023  M56 MPH          Cuyahoga           OH   ASOS             

            ASOS station KBKL Cleveland. 

0650 PM     Tstm Wnd Dmg     Jenera                  40.90N 83.72W
07/20/2023                   Hancock            OH   Public           

            -Delayed Report- A few tree limbs downed. 

0652 PM     Tstm Wnd Dmg     2 E Avon                41.45N 81.99W
07/20/2023                   Lorain             OH   Trained Spotter  

            Two trees down on a house. Time estimated 
            from radar. 

0656 PM     Hail             Avon                    41.45N 82.02W
07/20/2023  M1.00 inch       Lorain             OH   Broadcast Media  

             

0700 PM     Tstm Wnd Gst     5 NNE Lakewood          41.55N 81.77W
07/20/2023  M47 MPH          LEZ146             OH   Mesonet          

            Mesonet station 45176 4 NNE Lakewood. 

0704 PM     Hail             1 WNW North Olmsted     41.42N 81.94W
07/20/2023  E1.00 inch       Cuyahoga           OH   Public           

            Report from mPING: Quarter (1.00 in.) hail. 

0705 PM     Hail             1 NW Westlake           41.47N 81.94W
07/20/2023  E1.00 inch       Cuyahoga           OH   Public           

            Report from mPING: Quarter (1.00 in.) hail. 

0705 PM     Hail             Westlake                41.45N 81.93W
07/20/2023  E2.00 inch       Cuyahoga           OH   Public           

             

0705 PM     Tstm Wnd Dmg     North Olmsted           41.41N 81.92W
07/20/2023                   Cuyahoga           OH   Public           

            Two trees down in North Olmsted. 

0709 PM     Tstm Wnd Dmg     Vanlue                  40.97N 83.48W
07/20/2023                   Hancock            OH   Public           

            -Delayed Report- Top of maple tree fell 
            across roadway. Limb also downed on 
            neighboring property. 

0711 PM     Tstm Wnd Dmg     1 NNE Lakewood          41.49N 81.80W
07/20/2023                   Cuyahoga           OH   Public           

            Large tree branch snapped at Lakewood Park. 

0712 PM     Tstm Wnd Dmg     Conneautville           41.76N 80.37W
07/20/2023                   Crawford           PA   Public           

            Multiple trees and wires down in the 
            Conneautville, Venango, and Cambridge 
            Springs areas. 

0716 PM     Tstm Wnd Dmg     4 WSW Burton            41.44N 81.21W
07/20/2023                   Geauga             OH   Public           

            -Delayed Report- Tree downed across state 
            route 44. 

0717 PM     Tstm Wnd Dmg     2 ENE Fairview Park     41.45N 81.82W
07/20/2023                   Cuyahoga           OH   Public           

            -Delayed Report- Tree downed. Minor street 
            flooding also noted. 

0718 PM     Hail             1 W Parma               41.38N 81.75W
07/20/2023  E1.75 inch       Cuyahoga           OH   Public           

            quarter to golf ball-sized hail in Parma and 
            Parma Heights. 

0718 PM     Tstm Wnd Gst     3 WNW Cleveland         41.50N 81.73W
07/20/2023  M58 MPH          LEZ146             OH   Mesonet          

            Mesonet station XCLE Cleveland - Edgewater. 

0720 PM     Hail             1 SSE Brooklyn          41.41N 81.74W
07/20/2023  E1.50 inch       Cuyahoga           OH   NWS Employee     

            Retired NWS employee reports 1 and a half 
            inch hail in Parma. 

0720 PM     Tstm Wnd Dmg     1 NNE Parma             41.40N 81.72W
07/20/2023                   Cuyahoga           OH   Broadcast Media  

            Large tree branch on West 54th. 

0722 PM     Tstm Wnd Dmg     4 ENE Aurora            41.32N 81.28W
07/20/2023                   Portage            OH   Public           

            Large tree limb down 4 miles northwest of 
            Mantua. Time estimated via radar. 

0724 PM     Tstm Wnd Dmg     Berea                   41.37N 81.85W
07/20/2023                   Cuyahoga           OH   Public           

            -Delayed Report- Photos received via social 
            media of large limbs and one large tree 
            downed, with the tree falling on a road. 
            Minor street flooding also noted. 

0725 PM     Hail             Seven Hills             41.39N 81.68W
07/20/2023  E1.50 inch       Cuyahoga           OH   Public           

            1.5 inch hail. 

0726 PM     Tstm Wnd Dmg     Chagrin Falls           41.43N 81.40W
07/20/2023                   Cuyahoga           OH   Public           

            -Delayed Report- Tree uprooted. 

0726 PM     Hail             Brooklyn Heights        41.41N 81.66W
07/20/2023  E1.00 inch       Cuyahoga           OH   NWS Employee     

            Nickel to quarter sized hail at NWS 
            Cleveland office. 

0727 PM     Tstm Wnd Dmg     2 SE New Riegel         41.03N 83.29W
07/20/2023                   Seneca             OH   911 Call Center  

            Tree downed. Time estimated via radar. 

0736 PM     Tstm Wnd Dmg     Maple Heights           41.41N 81.57W
07/20/2023                   Cuyahoga           OH   Public           

            -Delayed Report- Large portion of tree 
            downed in Maple Heights. 

0736 PM     Flood            1 SE Brooklyn           41.42N 81.73W
07/20/2023                   Cuyahoga           OH   Amateur Radio    

            Ramps on Interstate 480 at Ridge Rd flooded 
            and inaccessible. 

0740 PM     Hail             1 ESE Parma             41.37N 81.71W
07/20/2023  E1.00 inch       Cuyahoga           OH   NWS Employee     

            Corrects previous hail report from 1 ESE 
            Parma. 

0740 PM     Hail             1 WSW Bedford           41.39N 81.56W
07/20/2023  E1.25 inch       Cuyahoga           OH   Public           

            Report from mPING: Half Dollar (1.25 in.). 

0741 PM     Tstm Wnd Dmg     New London              41.09N 82.40W
07/20/2023                   Huron              OH   Emergency Mngr   

            A few downed trees and power outages 
            reported in the New London area. Time 
            estimated via radar. 

0745 PM     Hail             Seven Hills             41.38N 81.68W
07/20/2023  E1.50 inch       Cuyahoga           OH   Public           

            Report from mPING: Ping Pong Ball (1.50 
            in.). 

0749 PM     Tstm Wnd Gst     1 ESE Vienna            41.25N 80.67W
07/20/2023  M49 MPH          Trumbull           OH   ASOS             

            ASOS station KYNG Youngstown. 

0749 PM     Tstm Wnd Dmg     Bloomville              41.05N 83.01W
07/20/2023                   Seneca             OH   911 Call Center  

            Two trees downed across road near 
            Bloomville. Time estimated via radar. 

0749 PM     Hail             1 ESE Parma             41.37N 81.71W
07/20/2023  E1.00 inch       Cuyahoga           OH   NWS Employee     

            . 

0750 PM     Tstm Wnd Dmg     1 SE Howland Center     41.24N 80.73W
07/20/2023                   Trumbull           OH   Law Enforcement  

            Reports of several trees down across Howland 
            Township. 

0750 PM     Tstm Wnd Dmg     Macedonia               41.32N 81.50W
07/20/2023                   Summit             OH   Public           

            -Delayed Report- Multiple photos received 
            via social media of large limbs and a tree 
            down in Macedonia...the tree landed on a 
            deck and pool. 

0750 PM     Tstm Wnd Dmg     1 N Macedonia           41.33N 81.49W
07/20/2023                   Summit             OH   Public           

            Tree down onto Park Ledge Drive. 

0750 PM     Tstm Wnd Dmg     Brunswick               41.24N 81.82W
07/20/2023                   Medina             OH   911 Call Center  

            Tree downed onto road in Brunswick. Time 
            estimated via radar. 

0755 PM     Flood            North Royalton          41.31N 81.75W
07/20/2023                   Cuyahoga           OH   Public           

            Basement flooding in North Royalton, Large 
            areas of 4 inch deep standing water in 
            backyards. 

0758 PM     Tstm Wnd Dmg     5 E Medina              41.13N 81.78W
07/20/2023                   Medina             OH   Public           

            Tree down on Boneta Rd between Route 18 and 
            Ridgewood. 

0759 PM     Flash Flood      1 SSW Lakewood          41.47N 81.81W
07/20/2023                   Cuyahoga           OH   Public           

            delayed report - Interstate 90 at McKinley 
            Ave under one to two feet of water. 

0800 PM     Tstm Wnd Dmg     1 ESE Churchill         41.17N 80.65W
07/20/2023                   Trumbull           OH   Law Enforcement  

            Several trees/wires down across Liberty 
            Township. 

0800 PM     Flood            Northfield              41.34N 81.53W
07/20/2023                   Summit             OH   Public           

            Vehicle inundated/stuck in flood water, 
            Route 8 closed. 

0800 PM     Flood            North Royalton          41.31N 81.75W
07/20/2023                   Cuyahoga           OH   Public           

            Several inches of flowing water across the 
            intersection of S Gateway and N Akins. 

0802 PM     Tstm Wnd Dmg     3 E Montrose-Ghent      41.16N 81.59W
07/20/2023                   Summit             OH   Public           

            Tree down on Yellow Creek Rd near Sand Run 
            Rd. 

0807 PM     Tstm Wnd Dmg     4 ENE Savannah          40.99N 82.31W
07/20/2023                   Ashland            OH   911 Call Center  

            A few trees and wires downed onto roadways 
            between Nova and Nankin. Time estimated via 
            radar. 

0807 PM     Tstm Wnd Dmg     4 ENE Savannah          40.98N 82.29W
07/20/2023                   Ashland            OH   911 Call Center  

            A few trees and wires downed onto roadways 
            between Nova and Nankin. Time estimated via 
            radar. 

0809 PM     Rain             1 SSW Seven Hills       41.36N 81.68W
07/20/2023  E3.00 inch       Cuyahoga           OH   Trained Spotter  

            3 inches of rain in an hour. 

0821 PM     Flood            2 ESE Lakewood          41.47N 81.77W
07/20/2023                   Cuyahoga           OH   Public           

            Corrects previous tstm wnd dmg report from 2 
            ESE Lakewood. Three cars submerged in water 
            at W117 and Berea Rd. 

0826 PM     Flood            1 N Brook Park          41.42N 81.83W
07/20/2023                   Cuyahoga           OH   Public           

            Cars inundated by water, required assistance 
            from CLE Hopkins ARFF. 

0838 PM     Tstm Wnd Dmg     3 NNW Wooster           40.86N 81.95W
07/20/2023                   Wayne              OH   911 Call Center  

            Tree limb downed onto road in the 
            Mechanicsburg/Wayne Twp area. A few other 
            wires reported downed in the county. Time 
            estimated via radar. 

0840 PM     Tstm Wnd Dmg     3 SSW Portage Lakes     40.95N 81.55W
07/20/2023                   Summit             OH   Public           

            several trees down and blocking roads in New 
            Franklin. 

0855 PM     Tstm Wnd Dmg     Massillon               40.79N 81.52W
07/20/2023                   Stark              OH   Public           

            -Delayed Report- Large tree snapped. 

0900 PM     Tstm Wnd Dmg     Mount Vernon            40.40N 82.48W
07/20/2023                   Knox               OH   911 Call Center  

            Scattered tree damage across Knox County, 
            especially western and southwestern portions 
            of the county. Time estimated via radar. 

0902 PM     Tstm Wnd Dmg     3 E North Canton        40.87N 81.33W
07/20/2023                   Stark              OH   Law Enforcement  

            Fallen tree onto roof of house. 

0915 PM     Flood            1 E Akron               41.08N 81.50W
07/20/2023                   Summit             OH   Public           

            -Delayed Report- Street flooding in downtown 
            Akron and east Akron. Standing water was too 
            deep for cars to drive through in at least 
            one spot. 


&&

$$

Environment


Figure 1: WPC surface analysis loop from 2 PM to 11 PM EDT on July 20, 2023.	Figure 2: SPC 9 AM convective outlook, outlining a portion of the Lower Great Lakes in an enhanced risk for severe storms (level 3 out of 5).

Near-storm environment via SPC mesoscale analysis archive page


Figure 3: Mixed-layer CAPE from 5 PM on July 20, 2023. Note the ribbon of moderate to strong instability present (2500 to 3000 J/kg) across the Lower Great Lakes.	Figure 4: Effective bulk shear from 5 PM on July 20, 2023. Values of 35 to 40 knots were observed, which is supportive of organized severe weather.	Figure 5: Supercell composite parameter (SCP) from 5 PM on July 20, 2023. SCP combines several different variables including instability and shear.	Figure 6: Mid-level lapse rates from 5 PM on July 20, 2023. Values of 6.5 to 7.5 C/km, which supports strong instability and thus strong updrafts in storms. Mid-level lapse rates this high for the area is uncommon.