Alert archive / Ohio / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 159, NWS Cleveland, OH

August 4, 2012Knox County, Ohio

NWS Cleveland, OH issued this severe thunderstorm warning at Aug 4, 2012, 11:56 PM EDT for Knox County, Ohio. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Aug 4, 2012, 11:56 PM EDT (03:56 UTC)
Expired
Aug 5, 2012, 12:43 AM EDT
In force
47 min
Issued by
NWS Cleveland, OH
Area
Storm-based polygon

County Knox County, OH

The radar

The Cleveland radar (KCLE), 129 km from the middle of the area, began a volume at 03:56 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.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Aug 4, 7:50 PM EDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 3.9 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 2012-08-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3062 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 2012-08-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 124 square meters per square second.1939Sfc1 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
3062 J/kg
Mixed-layer CIN
-5 J/kg
Mixed-layer LCL
842 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
124 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

967 
WUUS51 KCLE 050356
SVRCLE
OHC083-050500-
/O.NEW.KCLE.SV.W.0159.120805T0356Z-120805T0500Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CLEVELAND OH
1156 PM EDT SAT AUG 4 2012

THE NATIONAL WEATHER SERVICE IN CLEVELAND HAS ISSUED A

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

* UNTIL 100 AM EDT

* AT 1146 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING WINDS IN
  EXCESS OF 60 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM 11 MILES NORTHWEST OF DANVILLE TO MOUNT VERNON TO 7 MILES WEST
  OF CENTERBURG...AND MOVING EAST AT 30 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 4027 8248 4028 8275 4035 8274
      4034 8265 4036 8264 4055 8264 4055 8237
      4057 8218 4030 8218 4023 8220 4023 8238
TIME...MOT...LOC 0356Z 281DEG 28KT 4057 8228 4040 8244
          4032 8273

$$

LOMBARDY
2 follow-up statements
218 
WWUS51 KCLE 050417
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
1217 AM EDT SUN AUG 5 2012

OHC083-050500-
/O.CON.KCLE.SV.W.0159.000000T0000Z-120805T0500Z/
KNOX OH-
1217 AM EDT SUN AUG 5 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 100 AM EDT
FOR KNOX COUNTY...

AT 1212 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DAMAGING
WINDS IN EXCESS OF 60 MPH. THESE STORMS WERE LOCATED ALONG A LINE
EXTENDING FROM 6 MILES NORTHEAST OF GANN TO DANVILLE TO 7 MILES EAST
OF CENTERBURG...MOVING EAST AT 30 MPH.

LOCATIONS NEAR THE PATH OF SEVERE THUNDERSTORMS INCLUDE...MARTINSBURG
AND BLADENSBURG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4024 8243 4024 8247 4027 8248 4028 8275
      4035 8274 4034 8265 4043 8263 4045 8247
      4056 8219 4057 8218 4030 8218 4023 8220
TIME...MOT...LOC 0417Z 281DEG 28KT 4054 8207 4037 8223
          4029 8252

$$

MULLEN
784 
WWUS51 KCLE 050443
SVSCLE

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CLEVELAND OH
1243 AM EDT SUN AUG 5 2012

OHC083-050453-
/O.CAN.KCLE.SV.W.0159.000000T0000Z-120805T0500Z/
KNOX OH-
1243 AM EDT SUN AUG 5 2012

...THE SEVERE THUNDERSTORM WARNING FOR KNOX COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND NO LONGER
APPEARED TO BE SEVERE...HOWEVER GUSTY WINDS AND HEAVY RAIN ARE STILL 
POSSIBLE WITH THESE THUNDERSTORMS. SOME PONDING OF WATER IS 
POSSIBLE. 

LAT...LON 4024 8243 4024 8247 4027 8248 4028 8275
      4035 8274 4034 8265 4043 8263 4045 8247
      4056 8219 4057 8218 4030 8218 4023 8220
TIME...MOT...LOC 0443Z 281DEG 28KT 4050 8181 4033 8197
          4025 8226

$$

MULLEN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 8:09 PM EDTSevere Thunderstorm WarningCLEOttawa, Sandusky55 min
Aug 4, 8:22 PM EDTSpecial Marine WarningCLE113 min
Aug 4, 9:19 PM EDTSevere Thunderstorm WarningCLEHancock, Lucas, Wood71 min
Aug 4, 10:00 PM EDTSpecial Marine WarningCLE2 hr
Aug 4, 10:04 PM EDTSevere Thunderstorm WarningCLEOttawa, Sandusky, Seneca, Wyandot71 min
Aug 4, 10:37 PM EDTSevere Thunderstorm WarningCLEMarion53 min
Aug 4, 10:43 PM EDTSevere Thunderstorm WarningCLECrawford, Erie, Huron62 min
Aug 4, 11:30 PM EDTSevere Thunderstorm WarningCLEAshland, Lorain, Medina40 min
Aug 4, 11:44 PM EDTSevere Thunderstorm WarningCLEWayne61 min
Aug 4, 11:50 PM EDTSpecial Marine WarningCLE100 min
Aug 4, 11:51 PM EDTSevere Thunderstorm WarningCLECuyahoga22 min
Aug 5, 11:19 AM EDTSpecial Marine WarningCLE86 min
Aug 5, 2:42 PM EDTTornado WarningCLETrumbull18 min

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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.