Alert archive / Texas / Tornado Warnings in 2012
Tornado Warning 35, NWS Shreveport, LA
NWS Shreveport, LA issued this tornado warning at Apr 11, 2012, 4:06 PM CDT for Nacogdoches County, Shelby County, Texas. It was in force for 39 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
- Apr 11, 2012, 4:06 PM CDT (21:06 UTC)
- Expired
- Apr 11, 2012, 4:45 PM CDT
- In force
- 39 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
Counties Nacogdoches County, TX, Shelby County, TX
The radar
The Shreveport radar (KSHV), 93 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.
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 9.1 hours before the alert went out and 100 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
- 1015 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 833 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 73 m²/s²
- 0-3 km storm-relative helicity
- 33 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
060 WFUS54 KSHV 112106 TORSHV TXC347-419-112145- /O.NEW.KSHV.TO.W.0035.120411T2106Z-120411T2145Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 406 PM CDT WED APR 11 2012 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A * TORNADO WARNING FOR... NORTHEASTERN NACOGDOCHES COUNTY IN EASTERN TEXAS... WEST CENTRAL SHELBY COUNTY IN EASTERN TEXAS... * UNTIL 445 PM CDT * AT 403 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO NEAR STOCKMAN... MOVING SOUTHEAST AT 10 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO ARCADIA AND JERICHO... 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. 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 3171 9421 3166 9439 3176 9448 3181 9440 TIME...MOT...LOC 2106Z 318DEG 7KT 3174 9442 $$ 06
2 follow-up statements
255 WWUS54 KSHV 112133 SVSSHV SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 433 PM CDT WED APR 11 2012 TXC347-112139- /O.CAN.KSHV.TO.W.0035.000000T0000Z-120411T2145Z/ NACOGDOCHES TX- 433 PM CDT WED APR 11 2012 ...THE TORNADO WARNING FOR NACOGDOCHES COUNTY IS CANCELLED... LAT...LON 3169 9427 3166 9439 3171 9441 3175 9435 TIME...MOT...LOC 2129Z 322DEG 8KT 3169 9437 $$ TXC419-112145- /O.CON.KSHV.TO.W.0035.000000T0000Z-120411T2145Z/ SHELBY TX- 433 PM CDT WED APR 11 2012 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR SHELBY COUNTY... AT 428 PM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS THUNDERSTORM WAS LOCATED OVER SHELBY COUNTY...ABOUT 4 MILES SOUTHWEST OF ARCADIA...MOVING SOUTHEAST AT 10 MPH. THE TORNADO WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY. 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 3169 9427 3166 9439 3171 9441 3175 9435 TIME...MOT...LOC 2129Z 322DEG 8KT 3169 9437 $$ 06
783 WWUS54 KSHV 112145 SVSSHV SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 445 PM CDT WED APR 11 2012 TXC419-112154- /O.EXP.KSHV.TO.W.0035.000000T0000Z-120411T2145Z/ SHELBY TX- 445 PM CDT WED APR 11 2012 ...THE TORNADO WARNING FOR SHELBY COUNTY WILL EXPIRE AT 445 PM CDT... THE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO HAS DECREASED IN INTENSITY...BUT MAY PULSE UP LATER. THIS STORM WILL BE WATCHED. LAT...LON 3169 9427 3166 9439 3171 9441 3175 9435 TIME...MOT...LOC 2144Z 322DEG 8KT 3166 9435 $$ 06
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 10, 8:17 PM CDT | Severe Thunderstorm Warning | SHV | Bowie | 43 min |
| Apr 10, 9:40 PM CDT | Severe Thunderstorm Warning | SHV | Bowie | 35 min |
| Apr 11, 2:50 PM CDT | Tornado Warning | SHV | Rusk | 40 min |
| Apr 11, 3:22 PM CDT | Tornado Warning | SHV | Rusk | 31 min |
| Apr 11, 4:01 PM CDT | Tornado Warning | SHV | Sabine, San Augustine | 44 min |
Nearby
Tornado Warnings in Texas, 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.