Alert archive / Texas / Tornado Watches in 2007
Tornado Watch 136
The Storm Prediction Center issued this tornado watch at Apr 13, 2007, 5:48 PM CDT for 4 counties in Arkansas; 21 parishes in Louisiana; 45 counties in Texas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 13, 2007, 5:48 PM CDT (22:48 UTC)
- Expired
- Apr 14, 2007, 1:53 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Particularly dangerous situation
- Yes
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 70 kt
All 70 counties
Columbia County, AR, Lafayette County, AR, Miller County, AR, Union County, AR, Allen Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Union Parish, LA, Vernon Parish, LA, Webster Parish, LA, Winn Parish, LA, Anderson County, TX, Angelina County, TX, Bowie County, TX, Brazos County, TX, Burleson County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Delta County, TX, Franklin County, TX, Freestone County, TX, Gregg County, TX, Grimes County, TX, Harrison County, TX, Henderson County, TX, Hopkins County, TX, Houston County, TX, Jasper County, TX, Lamar County, TX, Leon County, TX, Madison County, TX, Marion County, TX, Milam County, TX, Montgomery County, TX, Morris County, TX, Nacogdoches County, TX, Newton County, TX, Panola County, TX, Polk County, TX, Rains County, TX, Red River County, TX, Robertson County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Trinity County, TX, Tyler County, TX, Upshur County, TX, Van Zandt County, TX, Walker County, TX, Wood County, TX
The radar
The Shreveport radar (KSHV), 70 km from the middle of the area, began a volume at 22:51 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 80%
- One or more EF2 to EF5 tornadoes
- 50%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 60%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
11 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 7:57 PM CDT | Tornado Warning | FWD | Hopkins, Rains, Van Zandt | 63 min |
| Apr 13, 8:55 PM CDT | Severe Thunderstorm Warning | SHV | Winn | 50 min |
| Apr 13, 8:55 PM CDT | Severe Thunderstorm Warning | SHV | Wood | 65 min |
| Apr 13, 8:59 PM CDT | Severe Thunderstorm Warning | FWD | Hopkins, Rains, Van Zandt | 46 min |
| Apr 13, 9:35 PM CDT | Severe Thunderstorm Warning | SHV | Smith | 55 min |
| Apr 13, 9:39 PM CDT | Severe Thunderstorm Warning | SHV | Franklin | 66 min |
| Apr 13, 9:59 PM CDT | Severe Thunderstorm Warning | SHV | Camp, Upshur, Wood | 61 min |
| Apr 13, 10:17 PM CDT | Severe Thunderstorm Warning | SHV | Cherokee | 58 min |
| Apr 13, 10:37 PM CDT | Severe Thunderstorm Warning | SHV | Gregg, Smith | 38 min |
| Apr 13, 11:09 PM CDT | Severe Thunderstorm Warning | HGX | Houston, Madison, Walker | 51 min |
| Apr 13, 11:55 PM CDT | Severe Thunderstorm Warning | HGX | Houston, Trinity | 36 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Shreveport, LA (KSHV), launched 12:00Z, 10.8 hours before the alert went out and 79 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2219 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 305 m²/s²
- 0-3 km storm-relative helicity
- 640 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.8
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 13, 12:37 PM CDT | Mesoscale Discussion | SPC | Calhoun, Clark, Columbia, Dallas, Garland, Hempstead and 13 more | 113 min |
| Apr 13, 6:00 PM CDT | Severe Thunderstorm Watch | SPC | Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 34 more | 8 hr |
| Apr 13, 5:08 PM CDT | Mesoscale Discussion | SPC | Beauregard, Caddo, De Soto, Natchitoches, Red River, Sabine and 1 more | 97 min |
| Apr 12, 7:37 PM CDT | Mesoscale Discussion | SPC | Baylor, Collingsworth, Foard, Hardeman, Wheeler, Wichita and 1 more | 113 min |
| Apr 12, 9:35 PM CDT | Mesoscale Discussion | SPC | Armstrong, Bailey, Briscoe, Carson, Castro, Childress and 35 more | 115 min |
| Apr 12, 11:31 PM CDT | Mesoscale Discussion | SPC | Andrews, Armstrong, Bailey, Borden, Briscoe, Carson and 38 more | 119 min |
| Apr 12, 11:46 PM CDT | Severe Thunderstorm Watch | SPC | Andrews, Armstrong, Bailey, Baylor, Borden, Briscoe and 63 more | 7 hr |
| Apr 13, 2:36 AM CDT | Mesoscale Discussion | SPC | Armstrong, Briscoe, Carson, Castro, Childress, Collingsworth and 23 more | 84 min |
| Apr 13, 5:34 AM CDT | Mesoscale Discussion | SPC | Archer, Armstrong, Baylor, Briscoe, Callahan, Carson and 32 more | 86 min |
| Apr 13, 12:12 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Fisher, Haskell, Hood, Jack and 8 more | 63 min |
| Apr 13, 12:27 PM CDT | Tornado Watch | SPC | Archer, Baylor, Brown, Callahan, Clay, Coke and 27 more | 7 hr |
| Apr 13, 2:51 PM CDT | Mesoscale Discussion | SPC | Anderson, Bell, Bosque, Cherokee, Collin, Cooke and 31 more | 54 min |
| Apr 13, 5:43 PM CDT | Tornado Watch | SPC | Bell, Bosque, Collin, Cooke, Coryell, Dallas and 22 more | 4 hr |
| Apr 13, 5:58 PM CDT | Mesoscale Discussion | SPC | Bandera, Blanco, Burnet, Edwards, Gillespie, Hays and 16 more | 62 min |
| Apr 13, 6:27 PM CDT | Tornado Watch | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 26 more | 8 hr |
Nearby
Tornado Watches in Texas, 2007Tornado Watches in Louisiana, 2007Tornado Watches in Arkansas, 2007Every tornado watch in 2007
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.