Alert archive / Ohio / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 98, NWS Wilmington, OH

August 12, 2021Miami County, Ohio

NWS Wilmington, OH issued this severe thunderstorm warning at Aug 12, 2021, 7:44 PM EDT for Miami County, Ohio. It was in force for 31 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, 7:44 PM EDT (23:44 UTC)
Expired
Aug 12, 2021, 8:15 PM EDT
In force
31 min
Issued by
NWS Wilmington, OH
Area
Storm-based polygon
Hail
0.75 in
Wind
60.0 mph

County Miami County, OH

The radar

The Cincinnati radar (KILN), 66 km from the middle of the area, began a volume at 23:44 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, 7:45 PM EDTTSTM WND DMG4 Wsw Troy, OHMULTIPLE LARGE TREES DOWN.

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, 11.7 hours before the alert went out and 66 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.

035 
WUUS51 KILN 122344
SVRILN
OHC109-130015-
/O.NEW.KILN.SV.W.0098.210812T2344Z-210813T0015Z/

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

The National Weather Service in Wilmington has issued a

* Severe Thunderstorm Warning for...
  Southern Miami County in west central Ohio...

* Until 815 PM EDT.

* At 744 PM EDT, a severe thunderstorm was located near West Milton,
  moving east at 30 mph.

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

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Troy, Tipp City, West Milton, Brown, Union, Casstown, Ludlow Falls,
  Ginghamsburg, Haven View and Grayson.

This includes I-75 in Ohio between mile markers 66 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 3991 8405 3992 8410 3992 8423 3993 8436
      4003 8435 4006 8403
TIME...MOT...LOC 2344Z 274DEG 28KT 3998 8427 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hatzos
2 follow-up statements
325 
WWUS51 KILN 122351
SVSILN

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

OHC109-130015-
/O.CON.KILN.SV.W.0098.000000T0000Z-210813T0015Z/
Miami OH-
751 PM EDT Thu Aug 12 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 815 PM EDT
FOR SOUTHEASTERN MIAMI COUNTY...

At 750 PM EDT, a severe thunderstorm was located over Tipp City,
moving east at 30 mph.

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

SOURCE...Radar indicated.

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

Locations impacted include...
Troy, Tipp City, Brown, Union, Casstown, Ginghamsburg, Haven View and
Grayson.

This includes I-75 in Ohio between mile markers 66 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 3991 8405 3992 8410 3992 8423 3993 8431
      4004 8428 4006 8403
TIME...MOT...LOC 2350Z 267DEG 26KT 3998 8420 

HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...0.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH

$$

Hatzos
028 
WWUS51 KILN 130010
SVSILN

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

OHC109-130019-
/O.EXP.KILN.SV.W.0098.000000T0000Z-210813T0015Z/
Miami OH-
810 PM EDT Thu Aug 12 2021

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN MIAMI COUNTY WILL
EXPIRE AT 815 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.

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 3991 8405 3992 8410 3992 8423 3993 8431
      4004 8428 4006 8403
TIME...MOT...LOC 0009Z 274DEG 28KT 3997 8402 

$$

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, 5:28 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, 7:50 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.