Alert archive / Ohio / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 97, NWS Wilmington, OH

August 12, 2021Franklin County, Madison County, Pickaway County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at Aug 12, 2021, 5:28 PM EDT for Franklin County, Madison County, Pickaway County, Ohio. It was in force for 47 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 12, 2021, 5:28 PM EDT (21:28 UTC)
Expired
Aug 12, 2021, 6:15 PM EDT
In force
47 min
Issued by
NWS Wilmington, OH
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

Counties Franklin County, OH, Madison County, OH, Pickaway County, OH

The radar

The Cincinnati radar (KILN), 72 km from the middle of the area, began a volume at 21:32 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, 6:02 PM EDTTSTM WND DMG2 S Big Plain, OHLARGE TREE DOWN BLOCKING ROADWAY.
Aug 12, 6:05 PM EDTTSTM WND DMG2 S Big Plain, OHLARGE TREE DOWN BLOCKING ROADWAY.
Aug 12, 6:05 PM EDTTSTM WND DMG5 N Mount Sterling, OHMULTIPLE LARGE TREES DOWN BLOCKING ROADS.
Aug 12, 6:07 PM EDTTSTM WND DMG3 Nnw Derby, OHMULTIPLE LARGE TREE LIMBS DOWNED IN ROADWAY.
Aug 12, 6:09 PM EDTTSTM WND DMG6 Nnw Mount Sterling, OHLARGE TREE DOWN. FELL INTO POWER LINES.
Aug 12, 6:13 PM EDTTSTM WND DMG5 Nnw Mount Sterling, OHLARGE TREE DOWN IN ROADWAY.
Aug 12, 6:13 PM EDTHAIL 15 N Mount Sterling, OH
Aug 12, 6:19 PM EDTTSTM WND DMGHarrisburg, OHMULTIPLE LARGE TREE LIMBS DOWN ON US 62.

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, 9.5 hours before the alert went out and 70 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°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.

505 
WUUS51 KILN 122128
SVRILN
OHC049-097-129-122215-
/O.NEW.KILN.SV.W.0097.210812T2128Z-210812T2215Z/

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

The National Weather Service in Wilmington has issued a

* Severe Thunderstorm Warning for...
  Southwestern Franklin County in central Ohio...
  Northwestern Pickaway County in central Ohio...
  Southeastern Madison County in central Ohio...

* Until 615 PM EDT.

* At 528 PM EDT, a severe thunderstorm was located near Jefferson,
  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...
  Columbus, Grove City, Bexley, Jefferson, West Jefferson, Lake
  Darby, Grandview Heights, Obetz, Urbancrest, Valleyview, Marble 
  Cliff, Harrisburg, Orient, Lockbourne, Lilly Chapel, Georgesville, 
  Madison Lake, Darbydale and Big Plain.

This includes the following Interstates...
 I-70 in Ohio between mile markers 79 and 103.
 I-71 in Ohio between mile markers 86 and 109.

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 3977 8340 3996 8338 4000 8318 3997 8294
      3980 8295 3977 8317
TIME...MOT...LOC 2128Z 264DEG 19KT 3990 8326 

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

$$

Hatzos
4 follow-up statements
400 
WWUS51 KILN 122136
SVSILN

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

OHC049-097-129-122215-
/O.CON.KILN.SV.W.0097.000000T0000Z-210812T2215Z/
Franklin OH-Pickaway OH-Madison OH-
536 PM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR SOUTHWESTERN FRANKLIN...NORTHWESTERN PICKAWAY AND SOUTHEASTERN
MADISON COUNTIES...

At 535 PM EDT, a severe thunderstorm was located near Lake Darby,
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...
Columbus, Grove City, Bexley, Jefferson, West Jefferson, Lake Darby,
Obetz, Urbancrest, Valleyview, Harrisburg, Orient, Lockbourne, Lilly
Chapel, Georgesville, Madison Lake, Darbydale, Big Plain,
Wrightsville, Lincoln Village and New Rome.

This includes the following Interstates...
 I-70 in Ohio between mile markers 96 and 103.
 I-71 in Ohio between mile markers 86 and 109.

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 3977 8340 3992 8338 3997 8318 3997 8294
      3980 8295 3977 8317
TIME...MOT...LOC 2135Z 269DEG 16KT 3987 8322 

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

$$

Hatzos
114 
WWUS51 KILN 122150
SVSILN

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

OHC049-097-129-122215-
/O.CON.KILN.SV.W.0097.000000T0000Z-210812T2215Z/
Franklin OH-Pickaway OH-Madison OH-
550 PM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR SOUTHWESTERN FRANKLIN...NORTHWESTERN PICKAWAY AND SOUTHEASTERN
MADISON COUNTIES...

At 550 PM EDT, a severe thunderstorm was located 7 miles north of
Mount Sterling, 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...
Columbus, Grove City, Obetz, Urbancrest, Harrisburg, Orient,
Lockbourne, Lilly Chapel, Georgesville, Madison Lake, Darbydale, Big
Plain, Wrightsville, Derby and Lincoln Village.

This includes I-71 in Ohio between mile markers 86 and 104.
 
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 3977 8340 3990 8338 3995 8313 3992 8294
      3980 8295 3977 8317
TIME...MOT...LOC 2150Z 273DEG 15KT 3982 8331 

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

$$

Hatzos
018 
WWUS51 KILN 122201
SVSILN

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

OHC049-097-129-122215-
/O.CON.KILN.SV.W.0097.000000T0000Z-210812T2215Z/
Franklin OH-Pickaway OH-Madison OH-
601 PM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 615 PM EDT
FOR SOUTHWESTERN FRANKLIN...NORTHWESTERN PICKAWAY AND SOUTHEASTERN
MADISON COUNTIES...

At 601 PM EDT, a severe thunderstorm was located 7 miles north of
Mount Sterling, 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...
Columbus, Grove City, Commercial Point, Urbancrest, Harrisburg,
Orient, Georgesville, Darbydale, Big Plain, Wrightsville and Derby.

This includes I-71 in Ohio between mile markers 86 and 104.
 
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 3986 8339 3992 8314 3992 8301 3979 8300
      3977 8317 3977 8340
TIME...MOT...LOC 2201Z 264DEG 16KT 3983 8327 

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

$$

Hatzos
375 
WWUS51 KILN 122214
SVSILN

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

OHC049-097-129-122224-
/O.EXP.KILN.SV.W.0097.000000T0000Z-210812T2215Z/
Franklin OH-Pickaway OH-Madison OH-
614 PM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN FRANKLIN...
NORTHWESTERN PICKAWAY AND SOUTHEASTERN MADISON COUNTIES WILL EXPIRE
AT 615 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.  However small hail
and gusty winds are still possible with this thunderstorm.

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 3986 8339 3992 8314 3992 8301 3979 8300
      3977 8317 3977 8340
TIME...MOT...LOC 2214Z 264DEG 19KT 3984 8319 

$$

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, 4:41 PM EDTSevere Thunderstorm WarningILNClark, Madison49 min
Aug 12, 5:13 PM EDTSpecial Weather StatementILNMadison32 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.