Alert archive / Ohio / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 79, NWS Cleveland, OH

August 11, 20216 counties in Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Aug 11, 2021, 4:30 PM EDT for 6 counties in Ohio. It was in force for 60 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, 4:30 PM EDT (20:30 UTC)
Expired: Aug 11, 2021, 5:30 PM EDT
In force: 60 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Ashland County, OH, Crawford County, OH, Knox County, OH, Marion County, OH, Morrow County, OH, Richland County, OH

The radar

The Cleveland radar (KCLE), 131 km from the middle of the area, began a volume at 20:34 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, 4:32 PM EDT	TSTM WND DMG	1 Ene Marion, OH	MULTIPLE TREES DOWN ON THE EAST SIDE OF MARION.
Aug 11, 4:53 PM EDT	TSTM WND DMG	1 Ese Mount Gilead, OH	TREES SNAPPED AND DAMAGE TO METAL ROOF.
Aug 11, 5:04 PM EDT	TSTM WND DMG	4 W Lexington, OH	SEVERAL TREES DOWN.
Aug 11, 5:04 PM EDT	TSTM WND DMG	Mansfield, OH	SEVERAL LARGE TREES DOWN AROUND CITY.
Aug 11, 5:09 PM EDT	TSTM WND DMG	Fredericktown, OH	NUMEROUS TREES AND POWERLINES DOWN THROUGHOUT FREDERICKTOWN.
Aug 11, 5:12 PM EDT	TSTM WND GST 70	Butler, OH
Aug 11, 5:20 PM EDT	TSTM WND DMG	Mount Vernon, OH	NUMEROUS TREES AND POWERLINES DOWN ACROSS THE CITY OF MOUNT VERNON.
Aug 11, 5:25 PM EDT	TSTM WND DMG	Danville, OH	NUMEROUS TREES AND POWERLINES DOWN THROUGHOUT DANVILLE.

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

Cncnati-Daytn, OH (KILN), launched 12:00Z, 8.5 hours before the alert went out and 144 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: 1853 J/kg
Mixed-layer CIN: -70 J/kg
Mixed-layer LCL: 1037 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

840 
WUUS51 KCLE 112030
SVRCLE
OHC005-033-083-101-117-139-112130-
/O.NEW.KCLE.SV.W.0079.210811T2030Z-210811T2130Z/

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

The National Weather Service in Cleveland has issued a

* Severe Thunderstorm Warning for...
  Southern Richland County in north central Ohio...
  Marion County in north central Ohio...
  Southwestern Ashland County in north central Ohio...
  Morrow County in north central Ohio...
  Southern Crawford County in north central Ohio...
  Knox County in north central Ohio...

* Until 530 PM EDT.

* At 429 PM EDT, severe thunderstorms were located along a line
  extending from near Bucyrus to near Marion to near West Mansfield,
  moving east at 40 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Mansfield, Marion, Mount Vernon, Mount Gilead, Galion, Ontario,
  Lexington, Loudonville, Fredericktown, Gambier, Utica, Cardington,
  Bellville, Centerburg, Ashley, Prospect, Danville, Waldo,
  Chesterville and Sparta.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4024 8248 4027 8248 4027 8274 4035 8275
      4036 8293 4041 8292 4044 8325 4051 8326
      4070 8316 4070 8311 4076 8311 4077 8221
      4054 8222 4024 8235
TIME...MOT...LOC 2029Z 259DEG 37KT 4084 8298 4062 8306 4038 8346 

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

$$

Jaszka

1 follow-up statement

513 
WWUS51 KCLE 112111
SVSCLE

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

OHC033-101-112121-
/O.CAN.KCLE.SV.W.0079.000000T0000Z-210811T2130Z/
Marion OH-Crawford OH-
511 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR MARION AND SOUTHERN CRAWFORD
COUNTIES IS CANCELLED...

The storms which prompted the warning have 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 4027 8268 4028 8274 4035 8275 4036 8293
      4041 8292 4041 8294 4057 8284 4070 8276
      4070 8221 4054 8222 4024 8235 4024 8248
      4027 8248
TIME...MOT...LOC 2111Z 258DEG 37KT 4093 8240 4063 8249 4029 8285 

$$

OHC005-083-117-139-112130-
/O.CON.KCLE.SV.W.0079.000000T0000Z-210811T2130Z/
Richland OH-Ashland OH-Morrow OH-Knox OH-
511 PM EDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR SOUTHERN RICHLAND...SOUTH CENTRAL ASHLAND...MORROW AND KNOX
COUNTIES...

At 511 PM EDT, severe thunderstorms were located along a line
extending from near Savannah to Bellville to near Sunbury, moving
east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Mansfield, Mount Vernon, Mount Gilead, Lexington, Loudonville,
Fredericktown, Gambier, Utica, Cardington, Bellville, Centerburg,
Ashley, Danville, Chesterville, Sparta, Waterford, Butler,
Perrysville, Lucas and Marengo.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4027 8268 4028 8274 4035 8275 4036 8293
      4041 8292 4041 8294 4057 8284 4070 8276
      4070 8221 4054 8222 4024 8235 4024 8248
      4027 8248
TIME...MOT...LOC 2111Z 258DEG 37KT 4093 8240 4063 8249 4029 8285 

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

$$

Jaszka

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, 4:39 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, 5:17 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.