Alert archive / Louisiana / Tornado Warnings in 2012
Tornado Warning 13, NWS Shreveport, LA
NWS Shreveport, LA issued this tornado warning at Mar 20, 2012, 9:24 PM CDT for Natchitoches Parish, Louisiana. It was in force for 36 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
- Mar 20, 2012, 9:24 PM CDT (02:24 UTC)
- Expired
- Mar 20, 2012, 10:00 PM CDT
- In force
- 36 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
County Natchitoches Parish, LA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Mar 20, 9:29 PM CDT | TORNADO | 2 E Natchitoches, LA | AN EF0 TORNADO TOUCHED DOWN NEAR THE CEDAR GROVE MOBILE HOME PARK. A TREE WAS SNAPPED ALONG HWY. 484 LEADING EAST INTO THE MOBILE HOME PARK. 3 HOMES SUSTAINED DAMAGE WITH ONE SUSTAINING MODERATE ROOF DAMAGE. DEBRIS WAS SCATTERED EAST AS THE TORNADO CROSSED A F |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Jackson, MS (KJAN), launched 00:00Z, 2.4 hours before the alert went out and 295 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
- 267 J/kg
- Mixed-layer CIN
- -21 J/kg
- Mixed-layer LCL
- 1256 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 145 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
604
WFUS54 KSHV 210224
TORSHV
LAC069-210300-
/O.NEW.KSHV.TO.W.0013.120321T0224Z-120321T0300Z/
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
924 PM CDT TUE MAR 20 2012
THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A
* TORNADO WARNING FOR...
CENTRAL NATCHITOCHES PARISH IN NORTHWEST LOUISIANA...
THIS INCLUDES THE CITY OF NATCHITOCHES...
* UNTIL 1000 PM CDT
* AT 924 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 7 MILES SOUTH OF
NATCHITOCHES...MOVING NORTH AT 40 MPH.
* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
CAMPTI...
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.
&&
LAT...LON 3190 9325 3196 9323 3196 9298 3160 9303
3160 9321
TIME...MOT...LOC 0224Z 180DEG 35KT 3167 9311
$$
132 follow-up statements
815
WWUS54 KSHV 210230
SVSSHV
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
930 PM CDT TUE MAR 20 2012
LAC069-210300-
/O.CON.KSHV.TO.W.0013.000000T0000Z-120321T0300Z/
NATCHITOCHES LA-
930 PM CDT TUE MAR 20 2012
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
NATCHITOCHES PARISH...
AT 930 PM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT A TORNADO. THIS TORNADO WAS
LOCATED JUST SOUTH OF NATCHITOCHES...MOVING NORTH AT 40 MPH.
ANOTHER STORM WITH STRONG ROTATION WAS INDICATED JUST NORTH OF
NATCHITOCHES OR WEST OF CLARENCE...MOVING NORTH NEAR 40 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
CLARENCE...GRAND ECORE...POWHATAN...CLEAR LAKE AND CAMPTI
PRECAUTIONARY/PREPAREDNESS ACTIONS...
HEAVY RAINFALL MAY OBSCURE THIS TORNADO. TAKE COVER NOW! IF YOU WAIT
TO SEE OR HEAR IT COMING...IT MAY BE TOO LATE TO GET TO A SAFE PLACE.
&&
LAT...LON 3169 9317 3190 9325 3196 9323 3196 9298
3169 9303
TIME...MOT...LOC 0230Z 180DEG 36KT 3175 9311
$$
13791
WWUS54 KSHV 210239
SVSSHV
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
939 PM CDT TUE MAR 20 2012
LAC069-210300-
/O.CON.KSHV.TO.W.0013.000000T0000Z-120321T0300Z/
NATCHITOCHES LA-
939 PM CDT TUE MAR 20 2012
...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT FOR
NATCHITOCHES PARISH...
AT 935 PM CDT...A THUNDERSTORM CAPABLE OF PRODUCING A TORNADO WAS
LOCATED JUST NORTH OF NATCHITOCHES...MOVING NORTH AT 40 MPH. ANOTHER
STORM CAPABLE OF PRODUCING A TORNADO WAS LOCATED OVER CAMPTI...MOVING
NORTH NEAR 40 MPH.
IF YOU LIVE ON THE NORTH SIDE OF NATCHITOCHES OR IN CAMPTI...TAKE COVER
IMMEDIATELY.
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.
&&
LAT...LON 3190 9325 3196 9323 3196 9298 3174 9303
3174 9317
TIME...MOT...LOC 0238Z 181DEG 34KT 3181 9310
$$
13The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 20, 8:55 PM CDT | Flash Flood Warning | SHV | Grant, Natchitoches, Sabine, Winn | 10 hr |
| Mar 20, 9:02 PM CDT | River Flood Warning | SHV | Bienville, Bossier, Red River, Webster | 11 days |
| Mar 20, 9:03 PM CDT | Tornado Warning | SHV | Natchitoches | 27 min |
| Mar 20, 9:15 PM CDT | Flash Flood Warning | SHV | Bienville, De Soto, Red River | 9 hr |
| Mar 20, 10:20 PM CDT | Tornado Warning | SHV | Grant, Natchitoches | 40 min |
| Mar 20, 10:50 PM CDT | Flash Flood Warning | SHV | Bossier, Claiborne, Webster | 10 hr |
| Mar 21, 1:52 AM CDT | Flash Flood Warning | SHV | Bienville, Jackson, Lincoln, Union | 8 hr |
| Mar 21, 2:49 AM CDT | Tornado Warning | SHV | Grant, Winn | 26 min |
| Mar 21, 3:14 AM CDT | Tornado Warning | SHV | Jackson, Winn | 46 min |
| Mar 21, 5:41 AM CDT | Tornado Warning | SHV | Jackson, Winn | 34 min |
| Mar 21, 6:16 AM CDT | Flash Flood Warning | SHV | Bienville, Red River | 3 hr |
| Mar 21, 6:47 AM CDT | Flash Flood Warning | SHV | Grant, Natchitoches, Red River, Sabine, Winn | 4 hr |
| Mar 21, 8:44 AM CDT | Flash Flood Warning | SHV | Claiborne | 2 hr |
| Mar 21, 9:36 AM CDT | Flash Flood Warning | SHV | Union | 114 min |
| Mar 21, 10:51 AM CDT | Flash Flood Warning | SHV | Grant, Natchitoches, Winn | 3 hr |
| Mar 21, 1:53 PM CDT | Areal Flood Warning | SHV | Natchitoches | 6 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.