Alert archive / Ohio / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 167, NWS Cleveland, OH

August 9, 2012Knox County, Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Aug 9, 2012, 8:45 PM EDT for Knox County, Ohio. It was in force for 60 min. 3 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 9, 2012, 8:45 PM EDT (00:45 UTC)
Expired
Aug 9, 2012, 9:45 PM EDT
In force
60 min
Issued by
NWS Cleveland, OH
Area
Storm-based polygon

County Knox County, OH

The radar

The Cleveland radar (KCLE), 130 km from the middle of the area, began a volume at 00:47 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 9, 9:05 PM EDTHAIL 1.75Gambier, OHSEVERAL REPORTS OF GOLF BALL-SIZED HAIL.
Aug 9, 9:08 PM EDTHAIL 12 Ne Gambier, OHQUARTER SIZE HAIL IN THE TOWN OF HOWARD.
Aug 9, 9:15 PM EDTHAIL 1.75Gambier, OHSEVERAL REPORTS OF GOLF BALL-SIZED HAIL.

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 00:00Z, 0.8 hours before the alert went out and 152 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 00:00Z on 2012-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 339 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 00:00Z on 2012-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 41 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
339 J/kg
Mixed-layer CIN
-117 J/kg
Mixed-layer LCL
841 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
41 m²/s²
0-3 km storm-relative helicity
51 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

205 
WUUS51 KCLE 100045
SVRCLE
OHC083-100145-
/O.NEW.KCLE.SV.W.0167.120810T0045Z-120810T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
845 PM EDT THU AUG 9 2012

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  KNOX COUNTY IN NORTH CENTRAL OHIO

* UNTIL 945 PM EDT

* AT 842 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  GAMBIER...AND MOVING EAST AT 15 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GAMBIER...
  DANVILLE...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. SEEK SHELTER INSIDE NOW AND STAY AWAY FROM
WINDOWS.

&&

PLEASE REPORT HAIL AND STRONG WINDS TO THE NATIONAL WEATHER SERVICE
BY CALLING TOLL FREE...877-633-6772...WHEN YOU CAN DO SO SAFELY.

LAT...LON 4024 8247 4026 8249 4027 8267 4028 8276
      4035 8275 4035 8265 4044 8264 4057 8220
      4057 8218 4030 8218 4023 8220
TIME...MOT...LOC 0045Z 250DEG 13KT 4033 8243

$$

KING
2 follow-up statements
811 
WWUS51 KCLE 100105
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
905 PM EDT THU AUG 9 2012

OHC083-100145-
/O.CON.KCLE.SV.W.0167.000000T0000Z-120810T0145Z/
KNOX OH-
905 PM EDT THU AUG 9 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 945 PM EDT
FOR KNOX COUNTY...

AT 903 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED
NEAR GAMBIER...OR 7 MILES EAST OF MOUNT VERNON...MOVING NORTHEAST AT
20 MPH.

LOCATIONS NEAR THE PATH OF THE SEVERE THUNDERSTORM INCLUDE...DANVILLE
AND GANN.

LAT...LON 4024 8247 4026 8249 4027 8267 4028 8276
      4035 8275 4035 8265 4044 8264 4057 8220
      4057 8218 4030 8218 4023 8220
TIME...MOT...LOC 0105Z 229DEG 18KT 4040 8234

$$

KING
041 
WWUS51 KCLE 100136
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
936 PM EDT THU AUG 9 2012

OHC083-100146-
/O.EXP.KCLE.SV.W.0167.000000T0000Z-120810T0145Z/
KNOX OH-
936 PM EDT THU AUG 9 2012

...THE SEVERE THUNDERSTORM WARNING FOR KNOX COUNTY EXPIRES AT 945 PM
EDT...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF
THE WARNED AREA.

LAT...LON 4024 8247 4026 8249 4027 8267 4028 8276
      4035 8275 4035 8265 4044 8264 4057 8220
      4057 8218 4030 8218 4023 8220
TIME...MOT...LOC 0136Z 229DEG 18KT 4050 8219

$$

JMAYERS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 9, 9:00 PM EDTSpecial Marine WarningCLE2 hr
Aug 9, 10:39 PM EDTSevere Thunderstorm WarningCLEErie31 min
Aug 9, 10:56 PM EDTSpecial Marine WarningCLE2 hr
Aug 10, 1:02 AM EDTSevere Thunderstorm WarningCLESandusky, Seneca58 min
Aug 10, 2:06 AM EDTSpecial Marine WarningCLE114 min
Aug 10, 2:14 AM EDTSevere Thunderstorm WarningCLEErie, Lorain43 min
Aug 10, 3:40 PM EDTSevere Thunderstorm WarningCLEGeauga, Lake50 min
Aug 10, 4:39 PM EDTAreal Flood AdvisoryCLELake3 hr

Nearby

Severe Thunderstorm Warnings in Ohio, 2012Every severe thunderstorm warning in 2012

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.