Alert archive / Louisiana / Tornado Warnings in 2012
Tornado Warning 17, NWS Shreveport, LA
NWS Shreveport, LA issued this tornado warning at Mar 21, 2012, 5:41 AM CDT for Jackson Parish, Winn Parish, Louisiana. It was in force for 34 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
- Mar 21, 2012, 5:41 AM CDT (10:41 UTC)
- Expired
- Mar 21, 2012, 6:15 AM CDT
- In force
- 34 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
Counties Jackson Parish, LA, Winn Parish, LA
The radar
The Shreveport radar (KSHV), 115 km from the middle of the area, began a volume at 10:42 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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Mar 20, 10:59 PM CDT | Tornado Watch | SPC | 7 hr |
| Mar 21, 5:04 AM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Jackson, MS (KJAN), launched 00:00Z, 10.7 hours before the alert went out and 244 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.
247 WFUS54 KSHV 211041 TORSHV LAC049-127-211115- /O.NEW.KSHV.TO.W.0017.120321T1041Z-120321T1115Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 541 AM CDT WED MAR 21 2012 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A * TORNADO WARNING FOR... SOUTHERN JACKSON PARISH IN NORTH CENTRAL LOUISIANA... THIS INCLUDES THE CITY OF JONESBORO... CENTRAL WINN PARISH IN NORTH CENTRAL LOUISIANA... THIS INCLUDES THE CITY OF WINNFIELD... * UNTIL 615 AM CDT * AT 537 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR WINNFIELD...MOVING NORTH AT 40 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HUDSON...DODSON...HODGE...EAST HODGE...NORTH HODGE AND QUITMAN. 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 3235 9275 3228 9242 3189 9261 3193 9282 TIME...MOT...LOC 1041Z 192DEG 35KT 3201 9269 $$ 03
1 follow-up statement
302 WWUS54 KSHV 211101 SVSSHV SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 601 AM CDT WED MAR 21 2012 LAC127-211111- /O.CAN.KSHV.TO.W.0017.000000T0000Z-120321T1115Z/ WINN LA- 601 AM CDT WED MAR 21 2012 ...THE TORNADO WARNING FOR WINN PARISH IS CANCELLED... LAT...LON 3216 9249 3215 9278 3235 9275 3228 9242 TIME...MOT...LOC 1101Z 192DEG 35KT 3220 9264 $$ LAC049-211115- /O.CON.KSHV.TO.W.0017.000000T0000Z-120321T1115Z/ JACKSON LA- 601 AM CDT WED MAR 21 2012 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 615 AM CDT FOR JACKSON PARISH... AT 559 AM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT A TORNADO. THIS TORNADO WAS LOCATED NEAR JONESBORO...MOVING NORTH AT 40 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO HODGE...EAST HODGE AND NORTH HODGE PRECAUTIONARY/PREPAREDNESS ACTIONS... IF YOU ARE CAUGHT OUTSIDE...SEEK SHELTER IN A NEARBY REINFORCED BUILDING. AS A LAST RESORT...SEEK SHELTER IN A CULVERT...DITCH OR LOW SPOT AND COVER YOUR HEAD WITH YOUR HANDS. && LAT...LON 3216 9249 3215 9278 3235 9275 3228 9242 TIME...MOT...LOC 1101Z 192DEG 35KT 3220 9264 $$ 03
The 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, 9:24 PM CDT | Tornado Warning | SHV | Natchitoches | 36 min |
| 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, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.