Alert archive / Ohio / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 92, NWS Wilmington, OH

August 11, 2021Delaware County, Logan County, Union County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at Aug 11, 2021, 4:24 PM EDT for Delaware County, Logan County, Union County, Ohio. It was in force for 37 min. 2 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, 4:24 PM EDT (20:24 UTC)
Expired: Aug 11, 2021, 5:01 PM EDT
In force: 37 min
Issued by: NWS Wilmington, OH
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Delaware County, OH, Logan County, OH, Union County, OH

The radar

The Cincinnati radar (KILN), 117 km from the middle of the area, began a volume at 20:27 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, 4:29 PM EDT	TSTM WND DMG	Richwood, OH	TREES AND POWERLINES WERE BLOWN DOWN, PRIMARILY IN THE NORTHERN PORTION OF THE COUNTY.
Aug 11, 4:38 PM EDT	TSTM WND DMG	2 W Radnor, OH	TREE DOWN AT THE INTERSECTION OF RADNOR AND RIVER ROADS

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, 8.4 hours before the alert went out and 115 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.

685 
WUUS51 KILN 112024
SVRILN
OHC041-091-159-112115-
/O.NEW.KILN.SV.W.0092.210811T2024Z-210811T2115Z/

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

The National Weather Service in Wilmington has issued a

* Severe Thunderstorm Warning for...
  Eastern Logan County in west central Ohio...
  Delaware County in central Ohio...
  Union County in central Ohio...

* Until 515 PM EDT.

* At 423 PM EDT, a severe thunderstorm was located near West
  Mansfield, moving east at 45 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Delaware, Marysville, Powell, Richwood, Ashley, West Mansfield,
  Radnor, Milford Center, Shawnee Hills, Ostrander, Ridgeway,
  Magnetic Springs, Alum Creek State Park, Raymond, Delaware State
  Park, Broadway, Warrensburg, Pottersburg, Kilbourne and Essex.

This includes I-71 in Ohio between mile markers 123 and 139.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, go to our website at weather.gov/iln and
submit your report via social media, when you can do so safely.

&&

LAT...LON 4051 8326 4044 8325 4043 8302 4042 8301
      4041 8293 4036 8293 4035 8287 4016 8295
      4017 8349 4023 8350 4024 8367 4051 8359
TIME...MOT...LOC 2023Z 281DEG 39KT 4036 8349 

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

$$

Hatzos

3 follow-up statements

119 
WWUS51 KILN 112039
SVSILN

Severe Weather Statement
National Weather Service Wilmington OH
439 PM EDT Wed Aug 11 2021

OHC091-112048-
/O.CAN.KILN.SV.W.0092.000000T0000Z-210811T2115Z/
Logan OH-
439 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR EASTERN LOGAN 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
central and west central Ohio.

LAT...LON 4044 8325 4043 8302 4042 8302 4042 8301
      4041 8293 4036 8293 4035 8287 4016 8295
      4017 8349 4023 8349 4023 8355 4051 8346
      4051 8326
TIME...MOT...LOC 2038Z 287DEG 30KT 4030 8336 

$$

OHC041-159-112115-
/O.CON.KILN.SV.W.0092.000000T0000Z-210811T2115Z/
Delaware OH-Union OH-
439 PM EDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR DELAWARE AND UNION COUNTIES IN CENTRAL OHIO...

At 438 PM EDT, a severe thunderstorm was located near Marysville,
moving east at 35 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Marysville, Delaware, Powell, Richwood, Ashley, Radnor, Milford 
Center, Shawnee Hills, Ostrander, Magnetic Springs, Alum Creek State 
Park, Raymond, Delaware State Park, Broadway, Warrensburg, 
Pottersburg, Kilbourne, Essex and Lewis Center.

This includes I-71 in Ohio between mile markers 123 and 139.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, go to our website at weather.gov/iln and
submit your report via social media, when you can do so safely.

&&

LAT...LON 4044 8325 4043 8302 4042 8302 4042 8301
      4041 8293 4036 8293 4035 8287 4016 8295
      4017 8349 4023 8349 4023 8355 4051 8346
      4051 8326
TIME...MOT...LOC 2038Z 287DEG 30KT 4030 8336 

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

$$

Hatzos

154 
WWUS51 KILN 112050
SVSILN

Severe Weather Statement
National Weather Service Wilmington OH
450 PM EDT Wed Aug 11 2021

OHC041-159-112115-
/O.CON.KILN.SV.W.0092.000000T0000Z-210811T2115Z/
Delaware OH-Union OH-
450 PM EDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM EDT
FOR DELAWARE AND SOUTHEASTERN UNION COUNTIES IN CENTRAL OHIO...

At 448 PM EDT, a severe thunderstorm was located near Ostrander, 
moving east at 45 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Delaware, Marysville, Powell, Ashley, Radnor, Milford Center, 
Shawnee Hills, Ostrander, Magnetic Springs, Alum Creek State Park, 
Delaware State Park, Stratford, Bellepoint, Warrensburg, Pharisburg, 
Watkins, Leonardsburg, Kilbourne and New Dover.

This includes I-71 in Ohio between mile markers 123 and 139.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

To report severe weather, go to our website at weather.gov/iln and
submit your report via social media, when you can do so safely.

&&

LAT...LON 4044 8325 4043 8302 4042 8302 4042 8301
      4041 8293 4036 8293 4035 8287 4016 8295
      4017 8349 4023 8349
TIME...MOT...LOC 2048Z 276DEG 39KT 4030 8320 

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

$$

Hatzos

507 
WWUS51 KILN 112101
SVSILN

Severe Weather Statement
National Weather Service Wilmington OH
501 PM EDT Wed Aug 11 2021

OHC041-159-112111-
/O.CAN.KILN.SV.W.0092.000000T0000Z-210811T2115Z/
Delaware OH-Union OH-
501 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR DELAWARE AND SOUTHEASTERN
UNION COUNTIES IN CENTRAL OHIO IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.

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

Please report previous wind damage or hail to the National Weather
Service by going to our website at weather.gov/iln and submitting
your report via social media.

LAT...LON 4044 8325 4043 8302 4042 8302 4042 8301
      4041 8293 4036 8293 4035 8287 4016 8295
      4017 8349 4023 8349
TIME...MOT...LOC 2100Z 281DEG 39KT 4027 8301 

$$

Hatzos

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 11, 1:07 AM EDT	Special Weather Statement	ILN	Mercer	38 min
Aug 11, 3:14 AM EDT	Special Weather Statement	ILN	Licking	31 min
Aug 11, 3:44 AM EDT	Special Weather Statement	ILN	Licking	31 min
Aug 11, 8:34 AM EDT	Special Weather Statement	ILN	Hardin	41 min
Aug 11, 2:18 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize, Mercer	57 min
Aug 11, 2:55 PM EDT	Heat Advisory	ILN	Adams, Auglaize, Brown, Butler, Champaign, Clark and 26 more	29 hr
Aug 11, 3:03 PM EDT	Special Weather Statement	ILN	Darke	27 min
Aug 11, 3:10 PM EDT	Severe Thunderstorm Warning	ILN	Auglaize, Darke, Logan, Mercer, Shelby	65 min
Aug 11, 3:19 PM EDT	Severe Thunderstorm Warning	ILN	Hardin, Logan	56 min
Aug 11, 3:47 PM EDT	Severe Thunderstorm Warning	ILN	Darke, Miami, Shelby	41 min
Aug 11, 3:52 PM EDT	Special Weather Statement	ILN	Champaign, Logan	23 min
Aug 11, 4:11 PM EDT	Special Weather Statement	ILN	Hardin	19 min
Aug 11, 4:16 PM EDT	Special Weather Statement	ILN	Union	29 min
Aug 11, 4:30 PM EDT	Special Weather Statement	ILN	Champaign	30 min
Aug 11, 4:47 PM EDT	Special Weather Statement	ILN	Franklin, Madison	28 min
Aug 11, 4:58 PM EDT	Special Weather Statement	ILN	Licking	32 min
Aug 11, 5:03 PM EDT	Severe Thunderstorm Warning	ILN	Delaware, Franklin, Madison, Union	42 min
Aug 11, 5:30 PM EDT	Severe Thunderstorm Warning	ILN	Licking	41 min
Aug 11, 5:37 PM EDT	Special Weather Statement	ILN	Fairfield	23 min
Aug 11, 5:58 PM EDT	Special Weather Statement	ILN	Fairfield	32 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.