Alert archive / Ohio / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 80, NWS Cleveland, OH

August 11, 20216 counties in Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Aug 11, 2021, 4:39 PM EDT for 6 counties in Ohio. It was in force for 66 min. 8 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, 4:39 PM EDT (20:39 UTC)
Expired: Aug 11, 2021, 5:45 PM EDT
In force: 66 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Damage threat: Considerable
Hail: 0.75 in
Wind: 70.0 mph

Counties Ashland County, OH, Cuyahoga County, OH, Erie County, OH, Huron County, OH, Lorain County, OH, Medina County, OH

The radar

The Cleveland radar (KCLE), 36 km from the middle of the area, began a volume at 20:41 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, 4:57 PM EDT	TSTM WND DMG	Avon Lake, OH	LARGE TREE UPROOTED WHICH TOOK DOWN POWERLINES AND A FENCE.
Aug 11, 4:57 PM EDT	TSTM WND DMG	Avon Lake, OH	NUMEROUS TREES SNAPPED IN HALF VIA VIDEO SUBMITTED ON SOCIAL MEDIA.
Aug 11, 5:06 PM EDT	TSTM WND DMG	1 Nw Westlake, OH	LARGE TREE DOWN ACROSS CLEMENS ROAD.
Aug 11, 5:06 PM EDT	TSTM WND DMG	2 Wnw Rocky River, OH	LARGE TREE FELL ONTO HOME CAUSING ROOF DAMAGE.
Aug 11, 5:06 PM EDT	TSTM WND DMG	Elyria, OH	MULTIPLE TREES SNAPPED AND BLOCKING ROADWAYS ACROSS ELYRIA.
Aug 11, 5:09 PM EDT	TSTM WND DMG	3 Sw Westlake, OH	LARGE TREE UPROOTED AND FELL ONTO HOUSE ON HILLIARD BLVD.
Aug 11, 5:11 PM EDT	TSTM WND DMG	2 Wnw Bay Village, OH	MULTIPLE TREES AND POWER POLES/LINES DOWN.
Aug 11, 5:11 PM EDT	TSTM WND GST 75	2 Wnw Bay Village, OH	ESTIMATED 70-75 MPH WIND GUST.

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

The nearest sounding before it

Detroit, MI (KDTX), launched 12:00Z, 8.7 hours before the alert went out and 183 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: 106 J/kg
Mixed-layer CIN: -290 J/kg
Mixed-layer LCL: 1220 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 169 m²/s²
0-3 km storm-relative helicity: 167 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

847 
WUUS51 KCLE 112039
SVRCLE
OHC005-035-043-077-093-103-112145-
/O.NEW.KCLE.SV.W.0080.210811T2039Z-210811T2145Z/

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

The National Weather Service in Cleveland has issued a

* Severe Thunderstorm Warning for...
  Eastern Huron County in north central Ohio...
  Erie County in north central Ohio...
  Southwestern Cuyahoga County in northeastern Ohio...
  Medina County in northeastern Ohio...
  Northern Ashland County in north central Ohio...
  Lorain County in north central Ohio...

* Until 545 PM EDT.

* At 439 PM EDT, a severe thunderstorm was located near Northern
  Milan, or 8 miles southwest of Western Vermilion, moving east at 50
  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, Lorain, Elyria, Medina, Vermilion, Western Vermilion,
  Lakewood, Strongsville, Brunswick, Westlake, North Ridgeville, Avon
  Lake, Amherst, Grafton, Wellington, Lodi, New London, Creston,
  Wakeman and Chippewa Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4099 8251 4141 8252 4141 8249 4140 8247
      4143 8241 4150 8214 4152 8201 4150 8183
      4099 8182
TIME...MOT...LOC 2039Z 271DEG 42KT 4136 8251 

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

106 
WWUS51 KCLE 112107
SVSCLE

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

OHC005-035-043-077-093-103-112145-
/O.CON.KCLE.SV.W.0080.000000T0000Z-210811T2145Z/
Huron OH-Erie OH-Cuyahoga OH-Medina OH-Ashland OH-Lorain OH-
507 PM EDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR EASTERN HURON...ERIE...SOUTHWESTERN CUYAHOGA...MEDINA...NORTHERN
ASHLAND AND LORAIN COUNTIES...

At 506 PM EDT, a severe thunderstorm was located over Elyria, moving
east at 50 mph.

THIS IS A DESTRUCTIVE STORM FOR NORTHERN LORAIN AND NORTHWESTERN 
CUYAHOGA COUNTIES.

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, Lorain, Elyria, Medina, Vermilion, Western Vermilion,
Lakewood, Strongsville, Brunswick, Westlake, North Ridgeville, Avon
Lake, Amherst, Grafton, Wellington, Lodi, New London, Creston,
Wakeman and Chippewa Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4099 8251 4141 8252 4141 8249 4140 8247
      4143 8241 4150 8214 4152 8201 4150 8183
      4099 8182
TIME...MOT...LOC 2106Z 271DEG 42KT 4135 8209 

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

$$

Campbell

620 
WWUS51 KCLE 112120
SVSCLE

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

OHC043-112129-
/O.CAN.KCLE.SV.W.0080.000000T0000Z-210811T2145Z/
Erie OH-
520 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR ERIE COUNTY IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore, the warning has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
north central and northeastern Ohio.

LAT...LON 4099 8238 4128 8236 4129 8234 4144 8235
      4150 8214 4152 8201 4150 8183 4099 8182
TIME...MOT...LOC 2119Z 271DEG 42KT 4135 8187 

$$

OHC005-035-077-093-103-112145-
/O.CON.KCLE.SV.W.0080.000000T0000Z-210811T2145Z/
Huron OH-Cuyahoga OH-Medina OH-Ashland OH-Lorain OH-
520 PM EDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM EDT
FOR EAST CENTRAL HURON...SOUTHWESTERN CUYAHOGA...MEDINA...
NORTHEASTERN ASHLAND AND LORAIN COUNTIES...

At 519 PM EDT, a severe thunderstorm was located near Strongsville,
or 12 miles east of Elyria, moving east at 50 mph.

THIS IS A DESTRUCTIVE STORM FOR NORTHERN CUYAHOGA AND NORTHEASTERN 
LORAIN COUNTIES.

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, Lorain, Elyria, Medina, Vermilion, Western Vermilion,
Lakewood, Strongsville, Brunswick, Westlake, North Ridgeville, Avon
Lake, Amherst, Grafton, Wellington, Lodi, Creston, Chippewa Lake,
North Olmsted and Avon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4099 8238 4128 8236 4129 8234 4144 8235
      4150 8214 4152 8201 4150 8183 4099 8182
TIME...MOT...LOC 2119Z 271DEG 42KT 4135 8187 

THUNDERSTORM DAMAGE THREAT...DESTRUCTIVE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...80 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, 4:44 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, 5:17 PM EDT	Severe Thunderstorm Warning Considerable damage threat	CLE	Cuyahoga, Geauga, Lake, Portage, Summit	58 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.