Alert archive / Ohio / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 89, NWS Cleveland, OH

August 12, 20216 counties in Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Aug 12, 2021, 10:28 AM EDT for 6 counties in Ohio. It was in force for 47 min. 3 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 12, 2021, 10:28 AM EDT (14:28 UTC)
Expired: Aug 12, 2021, 11:15 AM EDT
In force: 47 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Ashtabula County, OH, Cuyahoga County, OH, Geauga County, OH, Portage County, OH, Summit County, OH, Trumbull County, OH

The radar

The Cleveland radar (KCLE), 57 km from the middle of the area, began a volume at 14:31 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 12, 10:32 AM EDT	TSTM WND DMG	2 Se Bainbridge, OH	LARGE BRANCH AND UTILITY WIRES DOWN.
Aug 12, 10:38 AM EDT	TSTM WND DMG	6 Nw Hiram, OH	TREE DOWN ON WIRES.
Aug 12, 11:00 AM EDT	TSTM WND DMG	5 S Orwell, OH	SEVERAL TREES DOWN.

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

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 2.5 hours before the alert went out and 148 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: 1075 J/kg
Mixed-layer CIN: -107 J/kg
Mixed-layer LCL: 890 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 163 m²/s²
0-3 km storm-relative helicity: 129 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.8

Open this sounding in Storm Lab

The text

As transmitted.

601 
WUUS51 KCLE 121428
SVRCLE
OHC007-035-055-133-153-155-121515-
/O.NEW.KCLE.SV.W.0089.210812T1428Z-210812T1515Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cleveland OH
1028 AM EDT Thu Aug 12 2021

The National Weather Service in Cleveland has issued a

* Severe Thunderstorm Warning for...
  Northern Portage County in northeastern Ohio...
  Northwestern Trumbull County in northeastern Ohio...
  Geauga County in northeastern Ohio...
  East central Cuyahoga County in northeastern Ohio...
  Northeastern Summit County in northeastern Ohio...
  Southwestern Ashtabula County in northeastern Ohio...

* Until 1115 AM EDT.

* At 1028 AM EDT, severe thunderstorms were located along a line
  extending from near Highland Hills to Solon to near Cuyahoga Falls,
  moving east at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

  IMPACT...Expect damage to trees and power lines.

* Locations impacted include...
  Chardon, Cleveland Heights, Solon, Hudson, Twinsburg, Streetsboro,
  Warrensville Heights, Macedonia, Cortland, South Russell,
  Middlefield, Garrettsville, North Bloomfield, Orwell, Burton,
  Highland Hills, Mantua, West Farmington, Chesterland and
  Bristolville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4160 8073 4130 8072 4125 8155 4142 8151
      4150 8161 4157 8144
TIME...MOT...LOC 1428Z 264DEG 41KT 4148 8150 4140 8143 4122 8154 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Kahn

4 follow-up statements

623 
WWUS51 KCLE 121438
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
1038 AM EDT Thu Aug 12 2021

OHC035-153-121448-
/O.CAN.KCLE.SV.W.0089.000000T0000Z-210812T1515Z/
Cuyahoga OH-Summit OH-
1038 AM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL CUYAHOGA AND
NORTHEASTERN SUMMIT COUNTIES IS CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 4160 8073 4130 8072 4126 8140 4142 8139
      4142 8137 4144 8137 4145 8139 4155 8134
TIME...MOT...LOC 1438Z 270DEG 41KT 4149 8137 4141 8130 4123 8141 

$$

OHC007-055-133-155-121515-
/O.CON.KCLE.SV.W.0089.000000T0000Z-210812T1515Z/
Portage OH-Trumbull OH-Geauga OH-Ashtabula OH-
1038 AM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM EDT
FOR NORTHERN PORTAGE...NORTHWESTERN TRUMBULL...GEAUGA AND
SOUTHWESTERN ASHTABULA COUNTIES...

At 1038 AM EDT, severe thunderstorms were located along a line
extending from near Chesterland to near South Russell to Hudson,
moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

IMPACT...Expect damage to trees and power lines.

Locations impacted include...
Chardon, Solon, Hudson, Streetsboro, Cortland, South Russell,
Middlefield, Garrettsville, North Bloomfield, Orwell, Burton, Mantua,
West Farmington, Chesterland, Bristolville, Aurora, Parkman, Chagrin
Falls, Huntsburg and Reminderville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4160 8073 4130 8072 4126 8140 4142 8139
      4142 8137 4144 8137 4145 8139 4155 8134
TIME...MOT...LOC 1438Z 270DEG 41KT 4149 8137 4141 8130 4123 8141 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Kahn

350 
WWUS51 KCLE 121442
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
1042 AM EDT Thu Aug 12 2021

OHC007-055-133-155-121515-
/O.CON.KCLE.SV.W.0089.000000T0000Z-210812T1515Z/
Portage OH-Trumbull OH-Geauga OH-Ashtabula OH-
1042 AM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM EDT
FOR NORTHERN PORTAGE...NORTHWESTERN TRUMBULL...SOUTHERN GEAUGA AND
SOUTHWESTERN ASHTABULA COUNTIES...

At 1042 AM EDT, severe thunderstorms were located along a line
extending from near Chardon to near Burton to near Streetsboro,
moving east at 60 mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Streetsboro, Cortland, South Russell, Middlefield, Garrettsville,
North Bloomfield, Orwell, Burton, Mantua, West Farmington,
Bristolville, Aurora, Parkman, Huntsburg, Claridon, Mecca, Hiram,
Aquilla and Champion Heights.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4160 8073 4130 8072 4126 8140 4141 8130
      4154 8131
TIME...MOT...LOC 1442Z 263DEG 53KT 4151 8124 4143 8117 4125 8128 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Kahn

086 
WWUS51 KCLE 121453
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
1053 AM EDT Thu Aug 12 2021

OHC007-055-133-155-121515-
/O.CON.KCLE.SV.W.0089.000000T0000Z-210812T1515Z/
Portage OH-Trumbull OH-Geauga OH-Ashtabula OH-
1053 AM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM EDT
FOR NORTHEASTERN PORTAGE...NORTHWESTERN TRUMBULL...SOUTHEASTERN
GEAUGA AND SOUTHWESTERN ASHTABULA COUNTIES...

At 1052 AM EDT, severe thunderstorms were located along a line
extending from near Middlefield to near West Farmington to
Garrettsville, moving east at 50 mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Cortland, Middlefield, Garrettsville, North Bloomfield, Orwell, West
Farmington, Bristolville, Parkman, Huntsburg, Mecca, Hiram and
Champion Heights.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4160 8073 4130 8072 4127 8121 4143 8109
      4155 8107
TIME...MOT...LOC 1452Z 263DEG 44KT 4152 8106 4144 8099 4126 8110 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Kahn

240 
WWUS51 KCLE 121504
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
1104 AM EDT Thu Aug 12 2021

OHC007-055-133-121513-
/O.CAN.KCLE.SV.W.0089.000000T0000Z-210812T1515Z/
Portage OH-Geauga OH-Ashtabula OH-
1104 AM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN PORTAGE...
SOUTHEASTERN GEAUGA AND SOUTHWESTERN ASHTABULA COUNTIES IS
CANCELLED...

The storms which prompted the warning have moved out of the warned 
area. Therefore, the warning has been cancelled.

LAT...LON 4130 8072 4128 8097 4129 8100 4150 8100
      4150 8073
TIME...MOT...LOC 1503Z 264DEG 41KT 4153 8089 4145 8082 4127 8093 

$$

OHC155-121515-
/O.CON.KCLE.SV.W.0089.000000T0000Z-210812T1515Z/
Trumbull OH-
1104 AM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 AM EDT
FOR NORTHWESTERN TRUMBULL COUNTY...

At 1103 AM EDT, severe thunderstorms were located along a line
extending from Orwell to near North Bloomfield to near Leavittsburg,
moving east at 45 mph.

HAZARD...70 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Cortland, North Bloomfield, West Farmington, Bristolville, Mecca and
Champion Heights.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4130 8072 4128 8097 4129 8100 4150 8100
      4150 8073
TIME...MOT...LOC 1503Z 264DEG 41KT 4153 8089 4145 8082 4127 8093 

THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH

$$

Kahn

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 4:14 AM EDT	Heat Advisory	CLE	Ashland, Crawford, Cuyahoga, Erie, Hancock, Holmes and 19 more	15 hr
Aug 12, 4:56 AM EDT	Special Marine Warning	CLE		64 min
Aug 12, 5:12 AM EDT	Special Marine Warning	CLE		33 min
Aug 12, 7:33 AM EDT	Special Marine Warning	CLE		87 min
Aug 12, 8:21 AM EDT	Special Weather Statement	CLE	Medina	39 min
Aug 12, 8:59 AM EDT	Special Marine Warning	CLE		71 min
Aug 12, 9:03 AM EDT	Special Weather Statement	CLE	Ashtabula, Lake	42 min
Aug 12, 10:15 AM EDT	Special Weather Statement	CLE	Cuyahoga, Geauga, Portage	45 min
Aug 12, 10:23 AM EDT	Areal Flood Advisory	CLE	Cuyahoga	2 hr
Aug 12, 11:01 AM EDT	Severe Thunderstorm Warning Considerable damage threat	CLE	Ashtabula, Trumbull	40 min
Aug 12, 3:29 PM EDT	Special Weather Statement	CLE	Portage, Trumbull	46 min
Aug 12, 3:37 PM EDT	Special Weather Statement	CLE	Geauga	53 min
Aug 12, 3:42 PM EDT	Severe Thunderstorm Warning	CLE	Geauga, Portage, Summit	48 min
Aug 12, 3:54 PM EDT	Special Weather Statement	CLE	Mahoning	51 min
Aug 12, 4:00 PM EDT	Special Weather Statement	CLE	Summit	45 min
Aug 12, 4:09 PM EDT	Severe Thunderstorm Warning	CLE	Portage, Summit	51 min
Aug 12, 4:27 PM EDT	Severe Thunderstorm Warning	CLE	Geauga, Portage, Summit, Trumbull	63 min
Aug 12, 4:52 PM EDT	Severe Thunderstorm Warning	CLE	Mahoning, Portage	68 min
Aug 12, 6:11 PM EDT	Special Weather Statement	CLE	Morrow, Richland	64 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.