Alert archive / Ohio / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 107, NWS Cleveland, OH

September 15, 20217 counties in Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Sep 15, 2021, 1:04 AM EDT for 7 counties in Ohio. It was in force for 71 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Sep 15, 2021, 1:04 AM EDT (05:04 UTC)
Expired: Sep 15, 2021, 2:15 AM EDT
In force: 71 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

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

The radar

The Cleveland radar (KCLE), 37 km from the middle of the area, began a volume at 05:08 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.

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 00:00Z, 5.1 hours before the alert went out and 156 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: 961 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 1311 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 56 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.2

Open this sounding in Storm Lab

The text

As transmitted.

136 
WUUS51 KCLE 150504
SVRCLE
OHC035-055-085-093-103-133-153-150615-
/O.NEW.KCLE.SV.W.0107.210915T0504Z-210915T0615Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Cleveland OH
104 AM EDT Wed Sep 15 2021

The National Weather Service in Cleveland has issued a

* Severe Thunderstorm Warning for...
  Portage County in northeastern Ohio...
  Geauga County in northeastern Ohio...
  Cuyahoga County in northeastern Ohio...
  Northeastern Medina County in northeastern Ohio...
  Southwestern Lake County in northeastern Ohio...
  Northern Summit County in northeastern Ohio...
  East central Lorain County in north central Ohio...

* Until 215 AM EDT.

* At 103 AM EDT, severe thunderstorms were located along a line
  extending from near Lakewood to Grafton, moving east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Cleveland, Akron, Willowick, Ravenna, Chardon, Parma, Lakewood,
  Cuyahoga Falls, Euclid, Mentor, Cleveland Heights, Strongsville,
  Brunswick, Westlake, North Royalton, Kent, Solon, Willoughby,
  Hudson and Twinsburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4161 8100 4099 8100 4099 8111 4123 8207
      4153 8185 4154 8175 4167 8152
TIME...MOT...LOC 0503Z 278DEG 33KT 4151 8187 4127 8203 

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

$$

Lombardy

3 follow-up statements

154 
WWUS51 KCLE 150546
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
146 AM EDT Wed Sep 15 2021

OHC093-150556-
/O.CAN.KCLE.SV.W.0107.000000T0000Z-210915T0615Z/
Lorain OH-
146 AM EDT Wed Sep 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR EAST CENTRAL LORAIN COUNTY IS
CANCELLED...

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

LAT...LON 4161 8100 4099 8100 4118 8186 4150 8166
      4167 8152
TIME...MOT...LOC 0546Z 278DEG 33KT 4146 8136 4122 8153 

$$

OHC035-055-085-103-133-153-150615-
/O.CON.KCLE.SV.W.0107.000000T0000Z-210915T0615Z/
Portage OH-Geauga OH-Cuyahoga OH-Medina OH-Lake OH-Summit OH-
146 AM EDT Wed Sep 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 AM EDT
FOR PORTAGE...GEAUGA...CUYAHOGA...NORTHEASTERN MEDINA...SOUTHWESTERN
LAKE AND NORTHERN SUMMIT COUNTIES...

At 146 AM EDT, severe thunderstorms were located along a line
extending from near South Russell to near Cuyahoga Falls, moving east
at 40 mph.

HAZARD...60 mph wind gusts and penny size hail.

SOURCE...Radar indicated.

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

Locations impacted include...
Cleveland, Akron, Willowick, Ravenna, Chardon, Parma, Cuyahoga Falls,
Euclid, Mentor, Cleveland Heights, Strongsville, Brunswick, North
Royalton, Kent, Solon, Willoughby, Hudson, Twinsburg, Eastlake and
Tallmadge.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4161 8100 4099 8100 4118 8186 4150 8166
      4167 8152
TIME...MOT...LOC 0546Z 278DEG 33KT 4146 8136 4122 8153 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Campbell

768 
WWUS51 KCLE 150602
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
202 AM EDT Wed Sep 15 2021

OHC103-150612-
/O.CAN.KCLE.SV.W.0107.000000T0000Z-210915T0615Z/
Medina OH-
202 AM EDT Wed Sep 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN MEDINA COUNTY IS
CANCELLED...

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

LAT...LON 4161 8100 4099 8100 4115 8168 4141 8149
      4165 8131
TIME...MOT...LOC 0602Z 278DEG 33KT 4144 8119 4120 8136 

$$

OHC035-055-085-133-153-150615-
/O.CON.KCLE.SV.W.0107.000000T0000Z-210915T0615Z/
Portage OH-Geauga OH-Cuyahoga OH-Lake OH-Summit OH-
202 AM EDT Wed Sep 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 215 AM EDT
FOR PORTAGE...GEAUGA...SOUTHEASTERN CUYAHOGA...SOUTH CENTRAL LAKE AND
NORTHERN SUMMIT COUNTIES...

At 202 AM EDT, severe thunderstorms were located along a line
extending from near Burton to near Streetsboro, moving east at 40
mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Akron, Ravenna, Chardon, Cuyahoga Falls, Kent, Solon, Hudson,
Twinsburg, Tallmadge, Streetsboro, Macedonia, South Russell,
Middlefield, Garrettsville, Burton, Mantua, Chesterland, Stow, Aurora
and Brecksville.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 4161 8100 4099 8100 4115 8168 4141 8149
      4165 8131
TIME...MOT...LOC 0602Z 278DEG 33KT 4144 8119 4120 8136 

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

$$

Campbell

589 
WWUS51 KCLE 150611
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
211 AM EDT Wed Sep 15 2021

OHC035-055-085-133-153-150621-
/O.EXP.KCLE.SV.W.0107.000000T0000Z-210915T0615Z/
Portage OH-Geauga OH-Cuyahoga OH-Lake OH-Summit OH-
211 AM EDT Wed Sep 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR PORTAGE...GEAUGA...
SOUTHEASTERN CUYAHOGA...SOUTH CENTRAL LAKE AND NORTHERN SUMMIT
COUNTIES WILL EXPIRE AT 215 AM EDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore, the warning will be allowed to expire.  However gusty
winds are still possible with these thunderstorms.

LAT...LON 4161 8100 4099 8100 4115 8168 4141 8149
      4165 8131
TIME...MOT...LOC 0611Z 270DEG 33KT 4144 8115 4120 8132 

$$

Campbell

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 14, 8:28 PM EDT	Special Weather Statement	CLE	Lucas	62 min
Sep 14, 8:44 PM EDT	Severe Thunderstorm Warning	CLE	Lucas, Ottawa, Wood	61 min
Sep 14, 8:45 PM EDT	Special Marine Warning	CLE		2 hr
Sep 14, 9:30 PM EDT	Areal Flood Advisory	CLE	Lucas, Ottawa, Wood	68 min
Sep 14, 9:38 PM EDT	Severe Thunderstorm Warning	CLE	Erie, Lucas, Ottawa, Sandusky, Wood	67 min
Sep 14, 9:48 PM EDT	Special Marine Warning	CLE		87 min
Sep 14, 10:38 PM EDT	Flash Flood Warning	CLE	Lucas, Ottawa, Wood	5 hr
Sep 14, 10:45 PM EDT	Special Weather Statement	CLE	Erie, Ottawa, Sandusky	60 min
Sep 14, 10:50 PM EDT	Special Marine Warning	CLE		85 min
Sep 14, 10:59 PM EDT	Areal Flood Advisory	CLE	Erie, Ottawa, Sandusky	5 hr
Sep 14, 11:11 PM EDT	Special Marine Warning	CLE		94 min
Sep 14, 11:58 PM EDT	Special Marine Warning	CLE		92 min
Sep 15, 12:16 AM EDT	Special Weather Statement	CLE	Ashtabula, Geauga, Trumbull	59 min
Sep 15, 1:24 AM EDT	Areal Flood Advisory	CLE	Cuyahoga	3 hr

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.