Alert archive / Louisiana / Tornado Warnings in 2012

Tornado Warning 30, NWS Shreveport, LA

April 5, 2012Lincoln Parish, Ouachita Parish, Union Parish, Louisiana

NWS Shreveport, LA issued this tornado warning at Apr 5, 2012, 1:27 AM CDT for Lincoln Parish, Ouachita Parish, Union Parish, Louisiana. It was in force for 48 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
Apr 5, 2012, 1:27 AM CDT (06:27 UTC)
Expired
Apr 5, 2012, 2:15 AM CDT
In force
48 min
Issued by
NWS Shreveport, LA
Area
Storm-based polygon

Counties Lincoln Parish, LA, Ouachita Parish, LA, Union Parish, LA

The radar

The Shreveport radar (KSHV), 150 km from the middle of the area, began a volume at 06:27 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
Apr 5, 1:40 AM CDTHAIL 1Dubach, LA

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 6.5 hours before the alert went out and 141 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, Shreveport, LA at 00:00Z on 2012-04-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 439 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, Shreveport, LA at 00:00Z on 2012-04-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.1939587897Sfc1 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
439 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
1639 m above ground
0-6 km bulk shear
56 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
135 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

146 
WFUS54 KSHV 050627
TORSHV
LAC061-073-111-050715-
/O.NEW.KSHV.TO.W.0030.120405T0627Z-120405T0715Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
127 AM CDT THU APR 5 2012

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  NORTHEASTERN LINCOLN PARISH IN NORTH CENTRAL LOUISIANA...
  NORTHEASTERN OUACHITA PARISH IN NORTH CENTRAL LOUISIANA...
  SOUTHERN UNION PARISH IN NORTH CENTRAL LOUISIANA...

* UNTIL 215 AM CDT

* AT 124 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 15 MILES WEST OF
  FARMERVILLE...OR 12 MILES NORTH OF RUSTON...MOVING EAST AT 25 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  STERLINGTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE
STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO
DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...
MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM
WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

&&

LAT...LON 3258 9269 3276 9274 3277 9272 3279 9272
      3295 9208 3287 9207 3280 9205 3272 9206
      3271 9197 3267 9194 3267 9192 3265 9191
TIME...MOT...LOC 0628Z 269DEG 20KT 3270 9262

$$

05
1 follow-up statement
171 
WWUS54 KSHV 050655
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
155 AM CDT THU APR 5 2012

LAC061-050705-
/O.CAN.KSHV.TO.W.0030.000000T0000Z-120405T0715Z/
LINCOLN LA-
155 AM CDT THU APR 5 2012

...THE TORNADO WARNING FOR LINCOLN PARISH IS CANCELLED...

LAT...LON 3260 9241 3267 9241 3268 9245 3285 9248
      3295 9208 3280 9205 3272 9206 3271 9197
      3268 9196 3267 9194 3267 9192 3265 9191
TIME...MOT...LOC 0655Z 269DEG 20KT 3270 9244

$$

LAC073-111-050715-
/O.CON.KSHV.TO.W.0030.000000T0000Z-120405T0715Z/
UNION LA-OUACHITA LA-
155 AM CDT THU APR 5 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 215 AM CDT FOR OUACHITA
AND UNION PARISHES...

AT 154 AM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A TORNADO.  THIS TORNADO WAS
LOCATED NEAR BAYOU D ARBONNE LAKE...OR 16 MILES NORTHEAST OF
RUSTON...MOVING EAST AT 25 MPH.

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
FARMERVILLE...STERLINGTON...SPENCER...ROCKY BRANCH...PERRYVILLE...
MARION...LOCH LOMON...LINVILLE...HAILE...GUTHRIE...FAIRBANKS AND
DESHARD

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WARNING MEANS THAT STRONG ROTATION HAS BEEN DETECTED IN THE
STORM. A TORNADO MAY ALREADY BE ON THE GROUND...OR IS EXPECTED TO
DEVELOP SHORTLY. IF YOU ARE IN THE PATH OF THIS DANGEROUS STORM...
MOVE INDOORS AND TO THE LOWEST LEVEL OF THE BUILDING. STAY AWAY FROM
WINDOWS. IF DRIVING...DO NOT SEEK SHELTER UNDER A HIGHWAY OVERPASS.

&&

LAT...LON 3260 9241 3267 9241 3268 9245 3285 9248
      3295 9208 3280 9205 3272 9206 3271 9197
      3268 9196 3267 9194 3267 9192 3265 9191
TIME...MOT...LOC 0655Z 269DEG 20KT 3270 9244

$$

05

The office that day

Everything else NWS Shreveport, LA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 5, 12:49 AM CDTSevere Thunderstorm WarningSHVUnion56 min
Apr 5, 1:07 AM CDTSevere Thunderstorm WarningSHVBienville, Jackson, Lincoln, Union53 min
Apr 5, 2:37 AM CDTSevere Thunderstorm WarningSHVOuachita38 min
Apr 5, 4:03 AM CDTSevere Thunderstorm WarningSHVClaiborne, Lincoln, Union57 min
Apr 5, 5:14 AM CDTTornado WarningSHVOuachita, Union31 min
Apr 5, 5:30 AM CDTSevere Thunderstorm WarningSHVClaiborne, Lincoln, Union60 min

Nearby

Tornado Warnings in Louisiana, 2012Every tornado warning in 2012Tornadoes 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.