Alert archive / Ohio / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 96, NWS Wilmington, OH

August 12, 2021Clark County, Madison County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at Aug 12, 2021, 4:41 PM EDT for Clark County, Madison County, Ohio. It was in force for 49 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
Aug 12, 2021, 4:41 PM EDT (20:41 UTC)
Expired
Aug 12, 2021, 5:30 PM EDT
In force
49 min
Issued by
NWS Wilmington, OH
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Clark County, OH, Madison County, OH

The radar

The Cincinnati radar (KILN), 48 km from the middle of the area, began a volume at 20:45 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

TimeReportWhereRemark
Aug 12, 5:05 PM EDTHAIL 0.752 N South Charleston, OH

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, 8.7 hours before the alert went out and 47 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-pSkew-T log-p diagram, Cncnati-Daytn, OH at 12:00Z on 2021-08-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1817 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Cncnati-Daytn, OH at 12:00Z on 2021-08-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
1817 J/kg
Mixed-layer CIN
-77 J/kg
Mixed-layer LCL
946 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
96 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

632 
WUUS51 KILN 122041
SVRILN
OHC023-097-122130-
/O.NEW.KILN.SV.W.0096.210812T2041Z-210812T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Wilmington OH
441 PM EDT Thu Aug 12 2021

The National Weather Service in Wilmington has issued a

* Severe Thunderstorm Warning for...
  Eastern Clark County in west central Ohio...
  West central Madison County in central Ohio...

* Until 530 PM EDT.

* At 440 PM EDT, a severe thunderstorm was located 3 miles southeast 
  of Springfield, moving east at 15 mph.

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

  SOURCE...Radar indicated.

  IMPACT...Minor hail damage to vehicles is possible. Expect wind 
           damage to trees and power lines.

* Locations impacted include...
  Springfield, South Charleston, Choctaw Lake, Harmony, Lisbon,
  Brighton, South Vienna, Clifton, Pitchin, Springfield Municipal
  Airport and Plattsburg.

This includes I-70 in Ohio between mile markers 53 and 73.
 
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 3980 8349 3979 8374 3980 8382 3980 8383
      3982 8383 3982 8385 3993 8384 4002 8346
TIME...MOT...LOC 2040Z 254DEG 14KT 3990 8371 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hatzos
3 follow-up statements
664 
WWUS51 KILN 122054
SVSILN

Severe Weather Statement
National Weather Service Wilmington OH
454 PM EDT Thu Aug 12 2021

OHC023-097-122130-
/O.CON.KILN.SV.W.0096.000000T0000Z-210812T2130Z/
Clark OH-Madison OH-
454 PM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR SOUTHEASTERN CLARK AND WEST CENTRAL MADISON COUNTIES...

At 453 PM EDT, a severe thunderstorm was located near South
Charleston, moving east at 20 mph.

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

SOURCE...Radar indicated.

IMPACT...Minor hail damage to vehicles is possible. Expect wind 
         damage to trees and power lines.

Locations impacted include...
Springfield, South Charleston, Choctaw Lake, Harmony, Lisbon,
Brighton, South Vienna, Pitchin and Plattsburg.

This includes I-70 in Ohio between mile markers 57 and 74.
 
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 3980 8349 3979 8374 3980 8382 3993 8376
      3999 8346
TIME...MOT...LOC 2053Z 261DEG 16KT 3988 8364 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hatzos
920 
WWUS51 KILN 122112
SVSILN

Severe Weather Statement
National Weather Service Wilmington OH
512 PM EDT Thu Aug 12 2021

OHC023-097-122130-
/O.CON.KILN.SV.W.0096.000000T0000Z-210812T2130Z/
Clark OH-Madison OH-
512 PM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 530 PM EDT
FOR SOUTHEASTERN CLARK AND WEST CENTRAL MADISON COUNTIES...

At 512 PM EDT, a severe thunderstorm was located over South
Charleston, moving east at 15 mph.

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

SOURCE...Radar indicated.

IMPACT...Minor hail damage to vehicles is possible. Expect wind 
         damage to trees and power lines.

Locations impacted include...
South Charleston, Lisbon, Brighton, South Vienna, Pitchin and 
Plattsburg.

This includes I-70 in Ohio between mile markers 66 and 73.
 
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 3980 8349 3979 8374 3980 8380 3986 8376
      3993 8366 3995 8347
TIME...MOT...LOC 2112Z 256DEG 13KT 3986 8362 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hatzos
457 
WWUS51 KILN 122129
SVSILN

Severe Weather Statement
National Weather Service Wilmington OH
529 PM EDT Thu Aug 12 2021

OHC023-097-122139-
/O.EXP.KILN.SV.W.0096.000000T0000Z-210812T2130Z/
Clark OH-Madison OH-
529 PM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN CLARK AND WEST
CENTRAL MADISON COUNTIES WILL EXPIRE AT 530 PM EDT...
                
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 will be allowed to expire. Small hail and 
gusty winds are still possible with this storm.

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 3980 8349 3979 8374 3980 8380 3986 8376
      3993 8366 3995 8347
TIME...MOT...LOC 2129Z 254DEG 14KT 3988 8354 

$$

Hatzos

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 3:49 PM EDTSpecial Weather StatementILNClark26 min
Aug 12, 4:03 PM EDTSevere Thunderstorm WarningILNChampaign, Clark, Madison42 min
Aug 12, 5:13 PM EDTSpecial Weather StatementILNMadison32 min
Aug 12, 5:28 PM EDTSevere Thunderstorm WarningILNFranklin, Madison, Pickaway47 min
Aug 12, 5:29 PM EDTSpecial Weather StatementILNClark31 min
Aug 12, 5:58 PM EDTSpecial Weather StatementILNMadison32 min
Aug 12, 5:59 PM EDTSpecial Weather StatementILNDarke31 min
Aug 12, 6:03 PM EDTSpecial Weather StatementILNLicking27 min
Aug 12, 6:14 PM EDTSpecial Weather StatementILNMadison31 min
Aug 12, 6:29 PM EDTSpecial Weather StatementILNLicking31 min
Aug 12, 6:29 PM EDTSpecial Weather StatementILNDarke31 min
Aug 12, 6:50 PM EDTSpecial Weather StatementILNChampaign25 min
Aug 12, 6:54 PM EDTSpecial Weather StatementILNLicking36 min
Aug 12, 6:56 PM EDTSpecial Weather StatementILNMiami34 min
Aug 12, 6:57 PM EDTSpecial Weather StatementILNMadison33 min
Aug 12, 7:09 PM EDTSpecial Weather StatementILNDarke36 min
Aug 12, 7:18 PM EDTAreal Flood AdvisoryILNClark, Franklin, Madison2 hr
Aug 12, 7:24 PM EDTSpecial Weather StatementILNChampaign36 min
Aug 12, 7:26 PM EDTSpecial Weather StatementILNMadison34 min
Aug 12, 7:37 PM EDTSpecial Weather StatementILNMiami23 min
Aug 12, 7:44 PM EDTSevere Thunderstorm WarningILNMiami31 min
Aug 12, 7:50 PM EDTFlash Flood WarningILNClark, Madison3 hr
Aug 12, 7:55 PM EDTSpecial Weather StatementILNFranklin35 min
Aug 12, 7:57 PM EDTSpecial Weather StatementILNUnion33 min

Nearby

Severe Thunderstorm Warnings in Ohio, 2021Every 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.