Alert archive / Louisiana / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 488, NWS Jackson, MS

August 10, 2012Catahoula Parish, Franklin Parish, Louisiana

NWS Jackson, MS issued this severe thunderstorm warning at Aug 10, 2012, 4:34 PM CDT for Catahoula Parish, Franklin Parish, Louisiana. It was in force for 56 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 10, 2012, 4:34 PM CDT (21:34 UTC)
Expired: Aug 10, 2012, 5:30 PM CDT
In force: 56 min
Issued by: NWS Jackson, MS
Area: Storm-based polygon

Counties Catahoula Parish, LA, Franklin Parish, LA

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.6 hours before the alert went out and 170 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 989 J/kg
Mixed-layer CIN: -220 J/kg
Mixed-layer LCL: 1276 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 123 m²/s²
0-3 km storm-relative helicity: 122 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

Open this sounding in Storm Lab

The text

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

349 
WUUS54 KJAN 102134
SVRJAN
LAC025-041-102230-
/O.NEW.KJAN.SV.W.0488.120810T2134Z-120810T2230Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE JACKSON MS
434 PM CDT FRI AUG 10 2012

THE NATIONAL WEATHER SERVICE IN JACKSON HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN CATAHOULA PARISH IN NORTHEAST LOUISIANA...
  SOUTHERN FRANKLIN PARISH IN NORTHEAST LOUISIANA...

* UNTIL 530 PM CDT

* AT 434 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS
  OF 60 MPH.  THIS STORM WAS LOCATED NEAR LIDDIEVILLE MOVING
  SOUTHEAST AT 15 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  JIGGER...ENTERPRISE AND WISNER

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WINDS OF 60 MPH CAN BRING DOWN TREES...POSSIBLY RESULTING IN INJURY
AND PROPERTY DAMAGE. ROOFS OF MOBILE HOMES AND OUTBUILDINGS COULD BE
DAMAGED...AND MINOR ROOF DAMAGE TO WELL BUILT HOMES AND STRUCTURES
COULD OCCUR.

&&

LAT...LON 3210 9188 3214 9190 3217 9188 3218 9185
      3202 9156 3179 9181 3192 9193 3199 9190
      3204 9191 3208 9193
TIME...MOT...LOC 2134Z 312DEG 13KT 3207 9189

$$

BK

1 follow-up statement

018 
WWUS54 KJAN 102220
SVSJAN

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSON MS
520 PM CDT FRI AUG 10 2012

LAC025-041-102230-
/O.EXP.KJAN.SV.W.0488.000000T0000Z-120810T2230Z/
FRANKLIN LA-CATAHOULA LA-
520 PM CDT FRI AUG 10 2012

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CATAHOULA AND
SOUTHERN FRANKLIN PARISHES WILL EXPIRE AT 530 PM CDT...

THE SEVERE THUNDERSTORM WILL BE NEAR...
  WISNER BY 530 PM CDT...

LAT...LON 3210 9188 3214 9190 3217 9188 3218 9185
      3202 9156 3179 9181 3192 9193 3199 9190
      3204 9191 3208 9193
TIME...MOT...LOC 2220Z 312DEG 13KT 3196 9174

$$

BK

The office that day

Everything else NWS Jackson, MS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 9, 7:09 PM CDT	Special Weather Statement	JAN	Morehouse, West Carroll	31 min
Aug 9, 7:21 PM CDT	Special Weather Statement	JAN	Madison	29 min
Aug 9, 7:24 PM CDT	Severe Thunderstorm Warning	JAN	Morehouse, West Carroll	66 min
Aug 9, 7:32 PM CDT	Special Weather Statement	JAN	Morehouse	33 min
Aug 9, 7:41 PM CDT	Severe Thunderstorm Warning	JAN	Madison, Tensas	64 min
Aug 9, 7:52 PM CDT	Severe Thunderstorm Warning	JAN	Morehouse, Richland	53 min
Aug 9, 8:10 PM CDT	Severe Thunderstorm Warning	JAN	East Carroll	23 min
Aug 9, 8:31 PM CDT	Severe Thunderstorm Warning	JAN	Morehouse, Richland	44 min
Aug 9, 8:42 PM CDT	Severe Thunderstorm Warning	JAN	Franklin, Madison, Tensas	63 min
Aug 9, 8:45 PM CDT	Severe Thunderstorm Warning	JAN	Franklin, Richland	60 min
Aug 9, 9:11 PM CDT	Severe Thunderstorm Warning	JAN	Catahoula, Franklin, Richland, Tensas	64 min
Aug 9, 9:44 PM CDT	Severe Thunderstorm Warning	JAN	Franklin, Richland	46 min
Aug 9, 9:52 PM CDT	Severe Thunderstorm Warning	JAN	Catahoula, Concordia, Tensas	53 min
Aug 9, 9:55 PM CDT	Severe Thunderstorm Warning	JAN	Morehouse, West Carroll	65 min
Aug 9, 10:00 PM CDT	Flash Flood Warning	JAN	Catahoula, Franklin, Richland	3 hr
Aug 9, 10:11 PM CDT	Severe Thunderstorm Warning	JAN	Franklin, Richland	49 min
Aug 9, 10:21 PM CDT	Flash Flood Warning	JAN	East Carroll, Morehouse, Richland, West Carroll	114 min
Aug 9, 10:41 PM CDT	Severe Thunderstorm Warning	JAN	Morehouse, Richland, West Carroll	49 min
Aug 9, 10:43 PM CDT	Severe Thunderstorm Warning	JAN	Catahoula, Concordia	62 min
Aug 9, 11:15 PM CDT	Special Weather Statement	JAN	West Carroll	30 min
Aug 9, 11:27 PM CDT	Special Weather Statement	JAN	West Carroll	28 min
Aug 10, 4:49 PM CDT	Severe Thunderstorm Warning	JAN	Madison	56 min
Aug 10, 5:16 PM CDT	Special Weather Statement	JAN	Tensas	29 min
Aug 10, 5:42 PM CDT	Severe Thunderstorm Warning	JAN	Tensas	63 min
Aug 10, 6:00 PM CDT	Severe Thunderstorm Warning	JAN	Madison, Tensas	45 min
Aug 10, 6:04 PM CDT	Severe Thunderstorm Warning	JAN	Catahoula, Concordia	56 min
Aug 10, 6:22 PM CDT	Flash Flood Warning	JAN	Concordia	79 min
Aug 10, 6:59 PM CDT	Severe Thunderstorm Warning	JAN	Catahoula, Concordia	61 min

Nearby

Severe Thunderstorm Warnings in Louisiana, 2012 Every 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.