Alert archive / Ohio / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 91, NWS Wilmington, OH

August 11, 2021Darke County, Miami County, Shelby County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at Aug 11, 2021, 3:47 PM EDT for Darke County, Miami County, Shelby County, Ohio. It was in force for 41 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, 3:47 PM EDT (19:47 UTC)
Expired: Aug 11, 2021, 4:28 PM EDT
In force: 41 min
Issued by: NWS Wilmington, OH
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Darke County, OH, Miami County, OH, Shelby County, OH

The radar

The Cincinnati radar (KILN), 92 km from the middle of the area, began a volume at 19:49 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, 4:06 PM EDT	TSTM WND DMG	6 W St. Paris, OH	TREES DOWN OVER WIRES ALONG HIGHWAY 589 AND SODOM-BALLOU ROAD.
Aug 11, 4:30 PM EDT	TSTM WND DMG	6 Wnw St. Paris, OH	RV CAMPER FLIPPED ON ITS SIDE. TIME ESTIMATED USING RADAR DATA.

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, 7.8 hours before the alert went out and 92 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.

588 
WUUS51 KILN 111947
SVRILN
OHC037-109-149-112045-
/O.NEW.KILN.SV.W.0091.210811T1947Z-210811T2045Z/

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

The National Weather Service in Wilmington has issued a

* Severe Thunderstorm Warning for...
  Southern Shelby County in west central Ohio...
  Central Darke County in west central Ohio...
  Northern Miami County in west central Ohio...

* Until 445 PM EDT.

* At 346 PM EDT, severe thunderstorms were located along a line 
  extending from Anna to Union City, moving southeast at 35 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Sidney, Piqua, Greenville, Versailles, Covington, Bradford, Hardin,
  Webster, Wayne Lakes, Russia, Gettysburg, Fletcher, Port Jefferson,
  Hollansburg, Palestine, Lockington, Union Corners, Polo, Newbern
  and Maplewood.

This includes I-75 in Ohio between mile markers 78 and 95.
 
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 4014 8403 4000 8464 4000 8481 4009 8481
      4039 8400
TIME...MOT...LOC 1946Z 293DEG 32KT 4034 8425 4011 8479 

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

$$

Hatzos

3 follow-up statements

211 
WWUS51 KILN 112010
SVSILN

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

OHC037-109-149-112045-
/O.CON.KILN.SV.W.0091.000000T0000Z-210811T2045Z/
Shelby OH-Darke OH-Miami OH-
410 PM EDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHERN SHELBY...CENTRAL DARKE AND NORTHERN MIAMI COUNTIES...

At 410 PM EDT, severe thunderstorms were located along a line
extending from De Graff to Arcanum, moving southeast at 60 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Sidney, Piqua, Greenville, Versailles, Covington, Bradford, Hardin,
Webster, Wayne Lakes, Russia, Gettysburg, Fletcher, Port Jefferson,
Hollansburg, Palestine, Lockington, Union Corners, Polo, Newbern and
Maplewood.

This includes I-75 in Ohio between mile markers 78 and 95.
 
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 4014 8403 4000 8464 4000 8481 4009 8481
      4039 8400
TIME...MOT...LOC 2010Z 293DEG 53KT 4026 8403 4003 8457 

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

$$

Hatzos

222 
WWUS51 KILN 112016
SVSILN

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

OHC037-112026-
/O.CAN.KILN.SV.W.0091.000000T0000Z-210811T2045Z/
Darke OH-
416 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL DARKE COUNTY 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
west central Ohio.

LAT...LON 4014 8403 4006 8439 4027 8434 4039 8400
TIME...MOT...LOC 2016Z 276DEG 45KT 4025 8400 4011 8430 

$$

OHC109-149-112045-
/O.CON.KILN.SV.W.0091.000000T0000Z-210811T2045Z/
Shelby OH-Miami OH-
416 PM EDT Wed Aug 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM EDT
FOR SOUTHERN SHELBY AND NORTHERN MIAMI COUNTIES...

At 416 PM EDT, severe thunderstorms were located along a line
extending from De Graff to Covington, moving east at 50 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Sidney, Piqua, Covington, Hardin, Fletcher, Port Jefferson,
Lockington, Polo, Newbern, Ballou, Plattsville, Maplewood,
Farrington, Pemberton and Houston.

This includes I-75 in Ohio between mile markers 79 and 95.
 
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 4014 8403 4006 8439 4027 8434 4039 8400
TIME...MOT...LOC 2016Z 276DEG 45KT 4025 8400 4011 8430 

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

$$

Hatzos

780 
WWUS51 KILN 112028
SVSILN

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

OHC109-149-112038-
/O.CAN.KILN.SV.W.0091.000000T0000Z-210811T2045Z/
Shelby OH-Miami OH-
428 PM EDT Wed Aug 11 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN SHELBY AND NORTHERN
MIAMI COUNTIES IS CANCELLED...
            
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 has been cancelled.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
west 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 4014 8403 4006 8439 4027 8434 4039 8400
TIME...MOT...LOC 2027Z 293DEG 32KT 4021 8388 4007 8418 

$$

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, 3:52 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, 4:24 PM EDT	Severe Thunderstorm Warning	ILN	Delaware, Logan, Union	37 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.