Alert archive / Ohio / Tornado Warnings in 2020

Tornado Warning 7, NWS Cleveland, OH

September 7, 2020Knox County, Ohio

NWS Cleveland, OH issued this tornado warning at Sep 7, 2020, 5:48 PM EDT for Knox County, Ohio. It was in force for 30 min. 1 report 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: Sep 7, 2020, 5:48 PM EDT (21:48 UTC)
Expired: Sep 7, 2020, 6:18 PM EDT
In force: 30 min
Issued by: NWS Cleveland, OH
Area: Storm-based polygon
Tornado: Radar indicated
Hail: 1.0 in

County Knox County, OH

The radar

The Cleveland radar (KCLE), 128 km from the middle of the area, began a volume at 21:47 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
Sep 7, 5:52 PM EDT	TSTM WND DMG	Mount Vernon, OH	NUMEROUS TREES DOWN ACROSS MOUNT VERNON.

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

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 9.8 hours before the alert went out and 158 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1756 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 185 m²/s²
0-3 km storm-relative helicity: 195 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

225 
WFUS51 KCLE 072148
TORCLE
OHC083-072230-
/O.NEW.KCLE.TO.W.0007.200907T2148Z-200907T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Cleveland OH
548 PM EDT Mon Sep 7 2020

The National Weather Service in Cleveland has issued a

* Tornado Warning for...
  Knox County in north central Ohio...

* Until 630 PM EDT.
    
* At 548 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Gambier, or near Mount Vernon, moving east at 25
  mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

  IMPACT...Flying debris will be dangerous to those caught without 
           shelter. Mobile homes will be damaged or destroyed. 
           Damage to roofs, windows, and vehicles will occur.  Tree 
           damage is likely.

* Locations impacted include...
  Mount Vernon, Gambier, Utica, Danville, Martinsburg, Gann and
  Bladensburg.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4024 8238 4025 8248 4027 8248 4028 8269
      4050 8247 4049 8218 4039 8218 4039 8219
      4024 8220
TIME...MOT...LOC 2148Z 272DEG 21KT 4041 8239 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Clark

2 follow-up statements

768 
WWUS51 KCLE 072203
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
603 PM EDT Mon Sep 7 2020

OHC083-072230-
/O.CON.KCLE.TO.W.0007.000000T0000Z-200907T2230Z/
Knox OH-
603 PM EDT Mon Sep 7 2020

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 630 PM EDT FOR
SOUTHEASTERN KNOX COUNTY...
    
At 603 PM EDT, a severe thunderstorm capable of producing a tornado
was located 7 miles southeast of Gambier, or 10 miles southeast of
Mount Vernon, moving east at 35 mph.

HAZARD...Tornado and quarter size hail.

SOURCE...Radar indicated rotation.

IMPACT...Flying debris will be dangerous to those caught without 
         shelter. Mobile homes will be damaged or destroyed. Damage 
         to roofs, windows, and vehicles will occur.  Tree damage is 
         likely.

Locations impacted include...
Mount Vernon, Gambier, Danville, Martinsburg, Gann and Bladensburg. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.

&&

LAT...LON 4024 8238 4026 8243 4037 8247 4046 8243
      4049 8218 4039 8218 4039 8219 4024 8220
TIME...MOT...LOC 2203Z 269DEG 32KT 4029 8232 

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

Clark

401 
WWUS51 KCLE 072218
SVSCLE

Severe Weather Statement
National Weather Service Cleveland OH
618 PM EDT Mon Sep 7 2020

OHC083-072228-
/O.CAN.KCLE.TO.W.0007.000000T0000Z-200907T2230Z/
Knox OH-
618 PM EDT Mon Sep 7 2020

...THE TORNADO WARNING FOR SOUTHEASTERN KNOX COUNTY IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore, the warning has been cancelled.  However small hail, gusty
winds and heavy rain are still possible with this thunderstorm.

LAT...LON 4024 8238 4026 8243 4037 8247 4046 8243
      4049 8218 4039 8218 4039 8219 4024 8220
TIME...MOT...LOC 2216Z 272DEG 21KT 4029 8217 

$$

Clark

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 7, 5:00 AM EDT	Special Marine Warning	CLE		90 min
Sep 7, 6:39 AM EDT	Special Weather Statement	CLE	Erie	51 min
Sep 7, 6:57 AM EDT	Special Weather Statement	CLE	Cuyahoga, Lorain	33 min
Sep 7, 7:52 AM EDT	Special Weather Statement	CLE	Cuyahoga, Erie, Geauga, Lake, Lorain	83 min
Sep 7, 7:58 AM EDT	Areal Flood Advisory	CLE	Cuyahoga, Erie, Geauga, Huron, Lake, Lorain and 5 more	4 hr
Sep 7, 8:26 AM EDT	Flash Flood Warning	CLE	Cuyahoga, Erie, Geauga, Huron, Lake, Lorain and 5 more	6 hr
Sep 7, 9:06 AM EDT	Special Weather Statement	CLE	Medina, Portage, Summit	54 min
Sep 7, 10:26 AM EDT	Areal Flood Advisory	CLE	Ashtabula, Geauga, Portage, Trumbull	4 hr
Sep 7, 11:26 AM EDT	Areal Flood Advisory	CLE	Lorain, Medina, Portage, Summit, Trumbull	5 hr
Sep 7, 11:33 AM EDT	River Flood Warning	CLE	Cuyahoga	17 hr
Sep 7, 12:39 PM EDT	Areal Flood Advisory	CLE	Mahoning, Portage, Stark, Summit	3 hr
Sep 7, 12:42 PM EDT	Areal Flood Advisory	CLE	Erie, Huron, Sandusky, Seneca	3 hr
Sep 7, 1:12 PM EDT	Flash Flood Warning	CLE	Mahoning	3 hr
Sep 7, 1:50 PM EDT	Flash Flood Warning	CLE	Lorain, Medina, Portage, Summit	4 hr
Sep 7, 1:59 PM EDT	Flash Flood Warning Considerable damage threat	CLE	Cuyahoga, Geauga, Lorain, Medina, Summit	4 hr
Sep 7, 2:05 PM EDT	Special Weather Statement	CLE	Knox	25 min
Sep 7, 2:40 PM EDT	Special Weather Statement	CLE	Holmes	35 min
Sep 7, 3:12 PM EDT	Special Weather Statement	CLE	Crawford	33 min
Sep 7, 3:45 PM EDT	Special Weather Statement	CLE	Ashland, Richland	30 min
Sep 7, 4:13 PM EDT	Areal Flood Advisory	CLE	Mahoning	3 hr
Sep 7, 4:14 PM EDT	Special Weather Statement	CLE	Marion	31 min
Sep 7, 4:22 PM EDT	Special Weather Statement	CLE	Holmes, Wayne	38 min
Sep 7, 4:29 PM EDT	Tornado Warning	CLE	Ashland, Knox, Richland	31 min
Sep 7, 4:54 PM EDT	Areal Flood Advisory	CLE	Ashland, Richland	3 hr
Sep 7, 4:57 PM EDT	Severe Thunderstorm Warning	CLE	Ashland, Holmes, Knox	48 min
Sep 7, 5:16 PM EDT	Severe Thunderstorm Warning	CLE	Knox, Morrow	59 min
Sep 7, 5:20 PM EDT	River Flood Warning	CLE	Lake	8 hr
Sep 7, 5:41 PM EDT	Areal Flood Advisory	CLE	Medina, Summit	2 hr
Sep 7, 5:44 PM EDT	Severe Thunderstorm Warning	CLE	Holmes	31 min

Nearby

Tornado Warnings in Ohio, 2020 Every tornado warning in 2020 Tornadoes in 2020

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.