Alert archive / Texas / Tornado Warnings in 2011
Tornado Warning 68, NWS Shreveport, LA
NWS Shreveport, LA issued this tornado warning at Apr 30, 2011, 9:44 PM CDT for Bowie County, Cass County, Texas. It was in force for 46 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 30, 2011, 9:44 PM CDT (02:44 UTC)
- Expired
- Apr 30, 2011, 10:30 PM CDT
- In force
- 46 min
- Issued by
- NWS Shreveport, LA
- Area
- Storm-based polygon
Counties Bowie County, TX, Cass County, TX
The radar
The Shreveport radar (KSHV), 89 km from the middle of the area, began a volume at 02:44 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 30, 10:03 PM CDT | HAIL 1 | 3 Se Douglassville, TX | STATE TROOPER REPORTED QUARTER SIZED HAIL |
| Apr 30, 10:05 PM CDT | HAIL 1 | 4 Nw Atlanta, TX | QUARTER SIZED HAIL REPORTED AT COUNTY ROAD 3214 AND HIGHWAY 77W |
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 30, 5:55 PM CDT | Tornado Watch | SPC | 8 hr |
The nearest sounding before it
Shreveport, LA (KSHV), launched 00:00Z, 2.7 hours before the alert went out and 92 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
- 3108 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 891 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 170 m²/s²
- 0-3 km storm-relative helicity
- 199 m²/s²
- Significant tornado parameter
- 2.3
- Supercell composite
- 13.1
The text
As transmitted, in the capitals the NWS used until 2016.
100 WFUS54 KSHV 010244 TORSHV TXC037-067-010330- /O.NEW.KSHV.TO.W.0068.110501T0244Z-110501T0330Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE SHREVEPORT LA 944 PM CDT SAT APR 30 2011 THE NATIONAL WEATHER SERVICE IN SHREVEPORT HAS ISSUED A * TORNADO WARNING FOR... SOUTH CENTRAL BOWIE COUNTY IN NORTHEAST TEXAS... CASS COUNTY IN NORTHEAST TEXAS... THIS INCLUDES THE CITY OF ATLANTA... * UNTIL 1030 PM CDT * AT 944 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO 12 MILES WEST OF LINDEN...OR 3 MILES NORTHEAST OF HUGHES SPRINGS...MOVING EAST NORTHEAST AT 20 MPH. * OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO BIVINS... PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING GOLFBALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. DAMAGE HAS BEEN REPORTED IN DOWNTOWN HUGHES SPRINGS FROM A CONFIRMED TORNADO. IF YOU ARE IN THE PATH OF THIS STORM...TAKE COVER IMMEDIATELY! && LAT...LON 3331 9428 3296 9406 3292 9458 3310 9465 TIME...MOT...LOC 0243Z 250DEG 17KT 3303 9454 $$ 15
1 follow-up statement
739 WWUS54 KSHV 010308 SVSSHV SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SHREVEPORT LA 1008 PM CDT SAT APR 30 2011 TXC037-010316- /O.CAN.KSHV.TO.W.0068.000000T0000Z-110501T0330Z/ BOWIE TX- 1008 PM CDT SAT APR 30 2011 ...THE TORNADO WARNING FOR BOWIE COUNTY IS CANCELLED... THE TORNADIC THUNDERSTORM WILL REMAIN JUST SOUTH OF BOWIE COUNTY. LAT...LON 3325 9425 3296 9406 3296 9442 3314 9453 TIME...MOT...LOC 0306Z 256DEG 20KT 3307 9437 $$ TXC067-010330- /O.CON.KSHV.TO.W.0068.000000T0000Z-110501T0330Z/ CASS TX- 1008 PM CDT SAT APR 30 2011 ...A TORNADO WARNING REMAINS IN EFFECT UNTIL 1030 PM CDT FOR CASS COUNTY... AT 1008 PM CDT...USING DOPPLER RADAR...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT A TORNADO. THIS TORNADO WAS LOCATED ABOUT 3 MILES NORTH OF LINDEN...OR 13 MILES WEST OF ATLANTA...MOVING EAST AT 25 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO DOUGLASSVILLE...RED HILL AND BIVINS PRECAUTIONARY/PREPAREDNESS ACTIONS... IN ADDITION TO THE TORNADO...THIS STORM IS CAPABLE OF PRODUCING GOLFBALL SIZE HAIL AND DESTRUCTIVE STRAIGHT LINE WINDS. TREES...POWER LINES...AND BUILDINGS WERE DAMAGED IN HUGHES SPRINGS FROM A CONFIRMED TORNADO. ALTHOUGH THE ROTATION HAS WEAKENED SLIGHTLY...A TORNADO MAY STILL REDEVELOP. IF YOU ARE IN ITS PATH OF THIS STORM...TAKE COVER IMMEDIATELY! && LAT...LON 3325 9425 3296 9406 3296 9442 3314 9453 TIME...MOT...LOC 0306Z 256DEG 20KT 3307 9437 $$ 15
The office that day
Everything else NWS Shreveport, LA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 7:03 PM CDT | Tornado Warning | SHV | Wood | 42 min |
| Apr 30, 7:44 PM CDT | Severe Thunderstorm Warning | SHV | Camp, Upshur, Wood | 61 min |
| Apr 30, 8:26 PM CDT | Tornado Warning | SHV | Camp, Morris, Titus, Upshur | 49 min |
| Apr 30, 9:02 PM CDT | Tornado Warning | SHV | Camp, Cass, Morris, Titus, Upshur | 43 min |
| Apr 30, 10:27 PM CDT | Severe Thunderstorm Warning | SHV | Cass | 63 min |
| May 1, 7:52 AM CDT | Severe Thunderstorm Warning | SHV | Red River | 53 min |
| May 1, 5:43 PM CDT | Severe Thunderstorm Warning | SHV | Gregg, Smith, Upshur, Wood | 62 min |
| May 1, 6:19 PM CDT | Tornado Warning | SHV | Gregg, Harrison, Marion, Upshur | 41 min |
Nearby
Tornado Warnings in Texas, 2011Every tornado warning in 2011Tornadoes in 2011
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.