Alert archive / Ohio / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 83, NWS Cleveland, OH

August 11, 20215 counties in Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Aug 11, 2021, 5:17 PM EDT for 5 counties in Ohio. It was in force for 58 min. 15 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Aug 11, 2021, 5:17 PM EDT (21:17 UTC)
Expired: Aug 11, 2021, 6:15 PM EDT
In force: 58 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

Counties Cuyahoga County, OH, Geauga County, OH, Lake County, OH, Portage County, OH, Summit County, OH

The radar

The Cleveland radar (KCLE), 29 km from the middle of the area, began a volume at 21:16 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Aug 11, 5:18 PM EDT	TSTM WND DMG	1 Sw Linndale, OH	POWER POLES SNAPPED IN HALF AND LINES DOWN ON WEST 130.
Aug 11, 5:18 PM EDT	TSTM WND DMG	3 W Cleveland, OH	MULTIPLE TREES SNAPPED AND A ROOF TORN OFF A WAREHOUSE IN GORDON SQUARE.
Aug 11, 5:18 PM EDT	TSTM WND DMG	Lakewood, OH	SNAPPED TREE FELL ONTO GARAGE.
Aug 11, 5:18 PM EDT	TSTM WND DMG	Lakewood, OH	NUMEROUS LARGE TREES AND POWER LINES REPORTED DOWN ACROSS THE CITY.
Aug 11, 5:20 PM EDT	TSTM WND DMG	1 Ese Euclid, OH	LARGE TREE FELL CAUSING MAJOR DAMAGE TO 3 VEHICLES.
Aug 11, 5:20 PM EDT	TSTM WND DMG	1 Nne Euclid, OH	LARGE TREE FELL ONTO HOUSE RESULTING IN A HOLE IN THE ROOF.
Aug 11, 5:23 PM EDT	TSTM WND DMG	1 Wsw Bratenahl, OH	LARGE TREE FELL ONTO VEHICLE ON HANNA LANE.
Aug 11, 5:23 PM EDT	TSTM WND DMG	Parma, OH	LARGE TREE UPROOTED WHICH CLIPPED A CORNER OF A HOUSE.
Aug 11, 5:25 PM EDT	TSTM WND DMG	1 Wnw Lyndhurst, OH	LARGE TREE SNAPPED.
Aug 11, 5:25 PM EDT	TSTM WND DMG	Mentor, OH	MULTIPLE LARGE TREE LIMBS DOWN, ONE ON A VEHICLE.
Aug 11, 5:27 PM EDT	TSTM WND GST 55	3 N Cleveland, OH	ASOS STATION KBKL CLEVELAND.
Aug 11, 5:30 PM EDT	TSTM WND DMG	Mentor, OH	LARGE TREE SNAPPED.
Aug 11, 5:32 PM EDT	TSTM WND DMG	1 Sw Kirtland Hills, OH	LARGE TREE DOWN ACROSS SANCTUARY ROAD.
Aug 11, 5:33 PM EDT	TSTM WND DMG	1 Wsw Shaker Heights, OH	MANY TREE LIMBS AND SEVERAL WHOLE TREES DOWN IN SHAKER HEIGHTS. TIME ESTIMATED VIA RADAR.
Aug 11, 5:46 PM EDT	TSTM WND DMG	1 W Solon, OH	LARGE TREE LIMB FELL ONTO CAR ON SOLON ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Aug 11, 2:32 PM EDT	Severe Thunderstorm Watch	SPC	4 hr
Aug 11, 4:57 PM EDT	Severe Thunderstorm Watch	SPC	3 hr

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 9.3 hours before the alert went out and 174 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 267 J/kg
Mixed-layer CIN: -243 J/kg
Mixed-layer LCL: 1321 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 131 m²/s²
0-3 km storm-relative helicity: 188 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

358 
WUUS51 KCLE 112117
SVRCLE
OHC035-055-085-133-153-112215-
/O.NEW.KCLE.SV.W.0083.210811T2117Z-210811T2215Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cleveland OH
517 PM EDT Wed Aug 11 2021

The National Weather Service in Cleveland has issued a

* Severe Thunderstorm Warning for...
  Northwestern Portage County in northeastern Ohio...
  Western Geauga County in northeastern Ohio...
  Cuyahoga County in northeastern Ohio...
  Southwestern Lake County in northeastern Ohio...
  Northern Summit County in northeastern Ohio...

* Until 615 PM EDT.

* At 517 PM EDT, a severe thunderstorm was located near Parma, or
  near Cleveland, moving east at 45 mph.

  HAZARD...70 mph wind gusts and penny size hail.

  SOURCE...Radar indicated.

  IMPACT...Expect considerable tree damage. Damage is likely to 
           mobile homes, roofs, and outbuildings.

* Locations impacted include...
  Cleveland, Painesville, Willowick, Fairport Harbor, Parma,
  Lakewood, Euclid, Mentor, Cleveland Heights, Strongsville,
  Brunswick, North Royalton, Solon, Willoughby, Twinsburg, Eastlake,
  Warrensville Heights, Macedonia, South Russell and Highland Hills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4178 8128 4128 8126 4127 8188 4150 8186
      4153 8173
TIME...MOT...LOC 2117Z 280DEG 38KT 4144 8174 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Campbell

2 follow-up statements

532 
WWUS51 KCLE 112133
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
533 PM EDT Wed Aug 11 2021

OHC035-055-085-133-153-112215-
/O.CON.KCLE.SV.W.0083.000000T0000Z-210811T2215Z/
Portage OH-Geauga OH-Cuyahoga OH-Lake OH-Summit OH-
533 PM EDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHWESTERN PORTAGE...WESTERN GEAUGA...CUYAHOGA...SOUTHWESTERN
LAKE AND NORTHERN SUMMIT COUNTIES...

At 533 PM EDT, a severe thunderstorm was located over Warrensville
Heights, or 9 miles southeast of Cleveland, moving east at 45 mph.

THIS IS A DESTRUCTIVE STORM FOR CUYAHOGA COUNTY.

HAZARD...80 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be heavily damaged. Expect 
         considerable damage to roofs, windows, and vehicles. 
         Extensive tree damage and power outages are likely.

Locations impacted include...
Cleveland, Painesville, Willowick, Fairport Harbor, Parma, Lakewood,
Euclid, Mentor, Cleveland Heights, Strongsville, Brunswick, North
Royalton, Solon, Willoughby, Twinsburg, Eastlake, Warrensville
Heights, Macedonia, South Russell and Highland Hills.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This is an EXTREMELY DANGEROUS SITUATION. This storm is producing 
widespread wind damage across Cuyahoga County. SEEK SHELTER NOW 
inside a sturdy structure and stay away from windows.

&&

LAT...LON 4178 8128 4128 8126 4127 8188 4150 8186
      4153 8173
TIME...MOT...LOC 2133Z 280DEG 38KT 4141 8152 

THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...80 MPH

$$

Campbell

828 
WWUS51 KCLE 112159 RRA
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
559 PM EDT Wed Aug 11 2021

OHC035-055-085-133-153-112215-
/O.CON.KCLE.SV.W.0083.000000T0000Z-210811T2215Z/
Portage OH-Geauga OH-Cuyahoga OH-Lake OH-Summit OH-
559 PM EDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR NORTHWESTERN PORTAGE...WESTERN GEAUGA...CUYAHOGA...SOUTHWESTERN
LAKE AND NORTHERN SUMMIT COUNTIES...

At 558 PM EDT, a line of severe thunderstorms was located near South 
Russell to Bedford, moving east at 45 mph.

HAZARD...70 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

IMPACT...Expect considerable tree damage. Damage is likely to mobile 
         homes, roofs, and outbuildings.

Locations impacted include...
Cleveland, Parma, Euclid, Cleveland Heights, North Royalton, Solon,
Hudson, Twinsburg, Warrensville Heights, Macedonia, South Russell,
Highland Hills, Chesterland, Garfield Heights, Shaker Heights, Maple
Heights, South Euclid, Parma Heights, Broadview Heights and Mayfield
Heights.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

This is an EXTREMELY DANGEROUS SITUATION. This storm is producing 
widespread wind damage across Cuyahoga and Geauga Counties. SEEK 
SHELTER NOW inside a sturdy structure and stay away from windows.

&&

LAT...LON 4165 8128 4128 8126 4127 8169 4128 8178
      4149 8173
TIME...MOT...LOC 2158Z 280DEG 38KT 4136 8117 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Campbell

The office that day

Everything else NWS Cleveland, OH issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 11, 2:04 AM EDT	Special Weather Statement	CLE	Hancock, Lucas, Wood, Wyandot	41 min
Aug 11, 2:26 AM EDT	Special Marine Warning	CLE		80 min
Aug 11, 2:40 AM EDT	Severe Thunderstorm Warning	CLE	Lucas, Ottawa, Sandusky, Wood	65 min
Aug 11, 2:50 AM EDT	Severe Thunderstorm Warning	CLE	Erie, Ottawa, Sandusky, Seneca	55 min
Aug 11, 3:03 AM EDT	Heat Advisory	CLE	Erie, Hancock, Lucas, Ottawa, Sandusky, Seneca and 1 more	12 hr
Aug 11, 3:36 AM EDT	Special Marine Warning	CLE		54 min
Aug 11, 4:03 AM EDT	Special Weather Statement	CLE	Ashtabula, Lake	42 min
Aug 11, 4:23 AM EDT	Special Marine Warning	CLE		67 min
Aug 11, 5:08 AM EDT	Special Marine Warning	CLE		50 min
Aug 11, 7:53 AM EDT	Special Weather Statement	CLE	Wood	52 min
Aug 11, 8:09 AM EDT	Special Weather Statement	CLE	Hancock	51 min
Aug 11, 8:29 AM EDT	Severe Thunderstorm Warning	CLE	Crawford, Hancock, Seneca, Wyandot	46 min
Aug 11, 8:40 AM EDT	Special Weather Statement	CLE	Erie, Sandusky	50 min
Aug 11, 8:41 AM EDT	Special Marine Warning	CLE		78 min
Aug 11, 8:58 AM EDT	Severe Thunderstorm Warning	CLE	Crawford, Huron, Richland, Seneca	62 min
Aug 11, 9:14 AM EDT	Severe Thunderstorm Warning	CLE	Erie, Huron, Lorain	61 min
Aug 11, 9:30 AM EDT	Special Weather Statement	CLE	Crawford, Richland	45 min
Aug 11, 9:44 AM EDT	Special Weather Statement	CLE	Medina	46 min
Aug 11, 10:13 AM EDT	Special Weather Statement	CLE	Portage, Summit	62 min
Aug 11, 10:20 AM EDT	Special Weather Statement	CLE	Stark, Wayne	40 min
Aug 11, 10:53 AM EDT	Special Weather Statement	CLE	Mahoning	67 min
Aug 11, 10:56 AM EDT	Severe Thunderstorm Warning	CLE	Mahoning, Portage, Stark	64 min
Aug 11, 11:02 AM EDT	Special Weather Statement	CLE	Trumbull	43 min
Aug 11, 11:45 AM EDT	Special Weather Statement	CLE	Trumbull	15 min
Aug 11, 2:48 PM EDT	Severe Thunderstorm Warning	CLE	Hancock, Lucas, Wood	57 min
Aug 11, 3:15 PM EDT	Special Marine Warning	CLE		90 min
Aug 11, 3:35 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CLE	Crawford, Hancock, Marion, Seneca, Wyandot	55 min
Aug 11, 3:37 PM EDT	Severe Thunderstorm Warning	CLE	Lucas, Ottawa, Sandusky, Wood	53 min
Aug 11, 3:53 PM EDT	Severe Thunderstorm Warning	CLE	Erie, Ottawa	52 min
Aug 11, 4:08 PM EDT	Special Marine Warning	CLE		2 hr
Aug 11, 4:14 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CLE	Crawford, Erie, Huron, Richland, Seneca	61 min
Aug 11, 4:20 PM EDT	Special Weather Statement	CLE	Morrow	55 min
Aug 11, 4:30 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Crawford, Knox, Marion, Morrow, Richland	60 min
Aug 11, 4:39 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CLE	Ashland, Cuyahoga, Erie, Huron, Lorain, Medina	66 min
Aug 11, 4:44 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Morrow, Richland	61 min
Aug 11, 4:45 PM EDT	Special Marine Warning	CLE		12 min
Aug 11, 5:15 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Holmes, Knox, Wayne	60 min
Aug 11, 5:29 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Knox	30 min
Aug 11, 5:36 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CLE	Mahoning, Medina, Portage, Stark, Summit, Wayne	69 min
Aug 11, 5:41 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CLE	Ashtabula, Geauga, Lake, Portage, Trumbull	79 min
Aug 11, 5:46 PM EDT	Special Marine Warning	CLE		86 min
Aug 11, 5:47 PM EDT	Areal Flood Advisory	CLE	Cuyahoga, Summit	3 hr
Aug 11, 6:09 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CLE	Ashtabula	75 min
Aug 11, 6:12 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CLE	Mahoning, Portage, Trumbull	69 min

Nearby

Severe Thunderstorm Warnings in Ohio, 2021 Every severe thunderstorm warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.