Alert archive / Texas / Tornado Warnings in 2012

Tornado Warning 20, NWS Shreveport, LA

April 3, 20124 counties in Texas

NWS Shreveport, LA issued this tornado warning at Apr 3, 2012, 4:07 PM CDT for 4 counties in Texas. It was in force for 38 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: Apr 3, 2012, 4:07 PM CDT (21:07 UTC)
Expired: Apr 3, 2012, 4:45 PM CDT
In force: 38 min
Issued by: NWS Shreveport, LA
Area: Storm-based polygon

Counties Bowie County, TX, Morris County, TX, Red River County, TX, Titus County, TX

The radar

The Shreveport radar (KSHV), 137 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
Apr 3, 4:10 PM CDT	TORNADO	5 Ne Mount Pleasant, TX	TITUS COUNTY SHERIFF REPORTED WITNESSING A TORNADO TOUCH DOWN.
Apr 3, 4:44 PM CDT	TORNADO	8 Sw De Kalb, TX	A TORNADO TOUCHED DOWN 8 MILES SW OF DE KALB TX...JUST WEST OF CR 4306 WHERE A FEW TREES WERE SNAPPED AND UPROOTED. THE TORNADO CROSSED CR 4306 AND CONTINUED ENE REMAINING OVER OPEN COUNTRY WHERE MORE TREES WERE SNAPPED AND UPROOTED. THE TORNADO LIFTED JUST WE

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
Apr 3, 2:36 PM 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 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1328 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 475 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 148 m²/s²
0-3 km storm-relative helicity: 286 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.5

Open this sounding in Storm Lab

The text

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

356 
WFUS54 KSHV 032107
TORSHV
TXC037-343-387-449-032145-
/O.NEW.KSHV.TO.W.0020.120403T2107Z-120403T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE SHREVEPORT LA
407 PM CDT TUE APR 3 2012

THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A

* TORNADO WARNING FOR...
  WEST CENTRAL BOWIE COUNTY IN NORTHEAST TEXAS...
  NORTHWESTERN MORRIS COUNTY IN NORTHEAST TEXAS...
  SOUTHEASTERN RED RIVER COUNTY IN NORTHEAST TEXAS...
  NORTHEASTERN TITUS COUNTY IN NORTHEAST TEXAS...

* UNTIL 445 PM CDT

* AT 407 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 11 MILES WEST OF
  US 259 AND I 30 INTERSECTION...OR 6 MILES NORTHEAST OF MOUNT
  PLEASANT...MOVING NORTHEAST AT 25 MPH.

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

LAT...LON 3353 9482 3338 9459 3319 9490 3323 9498
TIME...MOT...LOC 2107Z 219DEG 21KT 3325 9490

$$

1 follow-up statement

400 
WWUS54 KSHV 032126
SVSSHV

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SHREVEPORT LA
426 PM CDT TUE APR 3 2012

TXC037-343-387-449-032145-
/O.CON.KSHV.TO.W.0020.000000T0000Z-120403T2145Z/
MORRIS TX-RED RIVER TX-TITUS TX-BOWIE TX-
426 PM CDT TUE APR 3 2012

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 445 PM CDT FOR BOWIE...
TITUS...RED RIVER AND MORRIS COUNTIES...

AT 421 PM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE
METEOROLOGISTS CONTINUED TO DETECT STRONG ROTATION IN A THUNDERSTORM
IN NORTHEAST TITUS COUNTY. THIS STORM WAS LOCATED IN EXTREME NORTHEAST
TITUS COUNTY OR 10 MILES SOUTHWEST OF DALBY SPRINGS...MOVING NORTHEAST
AT 25 MPH. IF YOU LIVE IN DALBY SPRINGS...TAKE COVER IMMEDIATELY. 

LAT...LON 3324 9482 3331 9492 3353 9482 3338 9459
TIME...MOT...LOC 2121Z 219DEG 21KT 3331 9484

$$

13

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 3, 3:27 PM CDT	Severe Thunderstorm Warning	SHV	Red River, Titus	63 min
Apr 3, 3:38 PM CDT	Tornado Warning	SHV	Titus	37 min
Apr 3, 3:53 PM CDT	Tornado Warning	SHV	Red River	67 min
Apr 3, 4:29 PM CDT	Tornado Warning	SHV	Franklin, Red River, Titus	61 min
Apr 3, 4:40 PM CDT	Tornado Warning	SHV	Bowie, Red River	65 min
Apr 3, 4:55 PM CDT	Tornado Warning	SHV	Bowie, Red River	65 min
Apr 3, 5:24 PM CDT	Severe Thunderstorm Warning	SHV	Smith, Wood	66 min
Apr 3, 5:30 PM CDT	Tornado Warning	SHV	Bowie, Red River, Titus	60 min
Apr 3, 5:36 PM CDT	Severe Thunderstorm Warning	SHV	Bowie	54 min
Apr 3, 5:39 PM CDT	Tornado Warning	SHV	Camp, Franklin, Titus	66 min
Apr 3, 5:44 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Franklin, Morris, Red River, Titus	46 min
Apr 3, 6:01 PM CDT	Severe Thunderstorm Warning	SHV	Camp, Smith, Upshur, Wood	59 min
Apr 3, 6:10 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Smith, Wood	65 min
Apr 3, 6:14 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Cass, Morris, Red River, Titus	61 min
Apr 3, 6:23 PM CDT	Severe Thunderstorm Warning	SHV	Cass	67 min
Apr 3, 6:52 PM CDT	Severe Thunderstorm Warning	SHV	Bowie, Cass, Gregg, Harrison, Marion, Upshur	53 min
Apr 3, 6:53 PM CDT	Tornado Warning	SHV	Cass	67 min
Apr 3, 6:54 PM CDT	Tornado Warning	SHV	Cass, Gregg, Harrison, Marion, Upshur	51 min

Nearby

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