Alert archive / Louisiana / Tornado Warnings in 2012
Tornado Warning 7, NWS Shreveport, LA
NWS Shreveport, LA issued this tornado warning at Mar 11, 2012, 4:05 PM CDT for De Soto Parish, Natchitoches Parish, Red River Parish, Louisiana. It was in force for 40 min. 2 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
- Mar 11, 2012, 4:05 PM CDT (21:05 UTC)
- Expired
- Mar 11, 2012, 4:45 PM CDT
- In force
- 40 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
Counties De Soto Parish, LA, Natchitoches Parish, LA, Red River Parish, LA
The radar
The Shreveport radar (KSHV), 65 km from the middle of the area, began a volume at 21:08 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 11, 4:10 PM CDT | TSTM WND GST 0 | 13 Se Mansfield, LA | POWER POLES AND LINES DOWN. |
| Mar 11, 4:45 PM CDT | FUNNEL CLOUD | 2 Ne Coushatta, LA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 11, 11:55 AM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 9.1 hours before the alert went out and 61 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 419 m above ground
- 0-6 km bulk shear
- 50 kt
- 0-1 km storm-relative helicity
- 328 m²/s²
- 0-3 km storm-relative helicity
- 390 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
As transmitted, in the capitals the NWS used until 2016.
225 WFUS54 KSHV 112105 TORSHV LAC031-069-081-112145- /O.NEW.KSHV.TO.W.0007.120311T2105Z-120311T2145Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 405 PM CDT SUN MAR 11 2012 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN DE SOTO PARISH IN NORTHWEST LOUISIANA... WEST CENTRAL NATCHITOCHES PARISH IN NORTHWEST LOUISIANA... RED RIVER PARISH IN NORTHWEST LOUISIANA... * UNTIL 445 PM CDT * AT 405 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 11 MILES SOUTHWEST OF COUSHATTA...OR 16 MILES SOUTHEAST OF MANSFIELD... MOVING NORTHEAST AT 25 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RAMBIN...EVELYN...LAKE END...HANNA...ARMISTEAD...EDGEFIELD AND HALL SUMMIT. PRECAUTIONARY/PREPAREDNESS ACTIONS... IF IN MOBILE HOMES OR VEHICLES...EVACUATE THEM AND GET INSIDE A STURDY SHELTER. IF NO SHELTER IS AVAILABLE...LIE FLAT IN THE NEAREST DITCH OR OTHER LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE. && LAT...LON 3222 9331 3199 9315 3184 9341 3190 9364 TIME...MOT...LOC 2105Z 223DEG 22KT 3192 9346 $$ 15
1 follow-up statement
074
WWUS54 KSHV 112127
SVSSHV
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
427 PM CDT SUN MAR 11 2012
LAC031-069-112136-
/O.CAN.KSHV.TO.W.0007.000000T0000Z-120311T2145Z/
NATCHITOCHES LA-DE SOTO LA-
427 PM CDT SUN MAR 11 2012
...THE TORNADO WARNING FOR DE SOTO AND NATCHITOCHES PARISHES IS
CANCELLED...
THE SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO HAS EXITED SOUTHEAST
DESOTO AND EXTREME NORTHWEST NATCHITOCHES PARISHES.
LAT...LON 3196 9338 3199 9342 3203 9344 3222 9331
3199 9315 3197 9319 3197 9323 3194 9324
3190 9334 3190 9335
TIME...MOT...LOC 2126Z 229DEG 24KT 3201 9334
$$
LAC081-112145-
/O.CON.KSHV.TO.W.0007.000000T0000Z-120311T2145Z/
RED RIVER LA-
427 PM CDT SUN MAR 11 2012
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR RED RIVER
PARISH...
AT 427 PM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A TORNADO. THIS TORNADO WAS
LOCATED JUST SOUTHWEST OF COUSHATTA...OR 20 MILES EAST OF MANSFIELD...
MOVING NORTHEAST AT 25 MPH. IF YOU ARE IN THE CITY OF COUSHATTA...TAKE
COVER IMMEDIATELY!
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
COUSHATTA...EDGEFIELD AND HALL SUMMIT
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.
THE SAFEST PLACE TO BE DURING A TORNADO IS IN A BASEMENT. GET UNDER A
WORKBENCH OR OTHER PIECE OF STURDY FURNITURE. IF NO BASEMENT IS
AVAILABLE...SEEK SHELTER ON THE LOWEST FLOOR OF THE BUILDING IN AN
INTERIOR HALLWAY OR ROOM SUCH AS A CLOSET. USE BLANKETS OR PILLOWS TO
COVER YOUR BODY AND ALWAYS STAY AWAY FROM WINDOWS.
&&
LAT...LON 3196 9338 3199 9342 3203 9344 3222 9331
3199 9315 3197 9319 3197 9323 3194 9324
3190 9334 3190 9335
TIME...MOT...LOC 2126Z 229DEG 24KT 3201 9334
$$
15The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 11, 1:41 AM CST | River Flood Warning | SHV | Caldwell, Grant, LaSalle, Winn | 20 days |
| Mar 11, 2:44 PM CDT | Areal Flood Advisory | SHV | Bossier, Caddo, De Soto, Red River | 2 hr |
| Mar 11, 3:01 PM CDT | Severe Thunderstorm Warning | SHV | Sabine | 44 min |
| Mar 11, 3:55 PM CDT | Tornado Warning | SHV | Sabine | 50 min |
| Mar 11, 4:38 PM CDT | Severe Thunderstorm Warning | SHV | Natchitoches, Sabine | 49 min |
| Mar 11, 4:56 PM CDT | Areal Flood Warning | SHV | Sabine | 3 hr |
| Mar 11, 6:53 PM CDT | Areal Flood Advisory | SHV | Ouachita, Union | 3 hr |
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.