Alert archive / Texas / Tornado Watches in 2006
Tornado Watch 888
The Storm Prediction Center issued this tornado watch at Dec 29, 2006, 5:38 PM CST for 73 counties in Texas. It was in force for 10 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 29, 2006, 5:38 PM CST (23:38 UTC)
- Expired
- Dec 30, 2006, 4:00 AM CST
- In force
- 10 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 73 counties
Anderson County, TX, Angelina County, TX, Aransas County, TX, Austin County, TX, Bastrop County, TX, Bee County, TX, Bell County, TX, Bosque County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Calhoun County, TX, Chambers County, TX, Cherokee County, TX, Colorado County, TX, Coryell County, TX, DeWitt County, TX, Ellis County, TX, Falls County, TX, Fayette County, TX, Fort Bend County, TX, Freestone County, TX, Galveston County, TX, Goliad County, TX, Gonzales County, TX, Gregg County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Harrison County, TX, Henderson County, TX, Hill County, TX, Hood County, TX, Houston County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Johnson County, TX, Lavaca County, TX, Lee County, TX, Leon County, TX, Liberty County, TX, Limestone County, TX, Madison County, TX, Matagorda County, TX, McLennan County, TX, Milam County, TX, Montgomery County, TX, Nacogdoches County, TX, Navarro County, TX, Newton County, TX, Orange County, TX, Panola County, TX, Polk County, TX, Refugio 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, Somervell County, TX, Travis County, TX, Trinity County, TX, Tyler County, TX, Victoria County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX, Williamson County, TX
The radar
The Houston radar (KHGX), 128 km from the middle of the area, began a volume at 23:38 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
- 30%
- Ten or more severe wind reports
- 80%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 29, 5:39 PM CST | Flash Flood Warning | FWD | Freestone, Limestone | 3 hr |
| Dec 29, 5:44 PM CST | Tornado Warning | FWD | Freestone | 46 min |
| Dec 29, 5:46 PM CST | Tornado Warning | FWD | Milam, Robertson | 44 min |
| Dec 29, 6:00 PM CST | Tornado Warning | FWD | Anderson | 45 min |
| Dec 29, 6:28 PM CST | Tornado Warning | FWD | Henderson | 47 min |
| Dec 29, 6:29 PM CST | Tornado Warning | FWD | Freestone, Navarro | 46 min |
| Dec 29, 7:02 PM CST | Tornado Warning | FWD | Anderson | 43 min |
| Dec 29, 7:07 PM CST | Severe Thunderstorm Warning | SHV | Smith, Wood | 38 min |
| Dec 29, 7:17 PM CST | Tornado Warning | FWD | Navarro | 33 min |
| Dec 29, 7:27 PM CST | Flash Flood Warning | FWD | Henderson, Kaufman, Navarro, Van Zandt | 3 hr |
| Dec 29, 7:36 PM CST | Tornado Warning | FWD | Henderson | 24 min |
| Dec 29, 7:56 PM CST | Flash Flood Warning | FWD | Robertson | 2 hr |
| Dec 29, 8:10 PM CST | Severe Thunderstorm Warning | LCH | Hardin, Jefferson | 65 min |
| Dec 29, 8:42 PM CST | Flash Flood Warning | FWD | Freestone, Limestone | 3 hr |
| Dec 29, 8:53 PM CST | Flash Flood Warning | LCH | Hardin | 2 hr |
| Dec 29, 9:12 PM CST | Severe Thunderstorm Warning | LCH | Newton | 63 min |
| Dec 30, 12:03 AM CST | Flash Flood Warning | SHV | Sabine, San Augustine | 4 hr |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 12:00Z, 11.6 hours before the alert went out and 310 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
- 119 J/kg
- Mixed-layer CIN
- -168 J/kg
- Mixed-layer LCL
- 485 m above ground
- 0-6 km bulk shear
- 44 kt
- 0-1 km storm-relative helicity
- 324 m²/s²
- 0-3 km storm-relative helicity
- 363 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 29, 11:42 AM CST | Mesoscale Discussion | SPC | Austin, Bastrop, Bell, Blanco, Bosque, Brazos and 44 more | 3 hr |
| Dec 29, 12:42 PM CST | Tornado Watch | SPC | Anderson, Aransas, Atascosa, Austin, Bastrop, Bee and 67 more | 5 hr |
| Dec 29, 1:09 PM CST | Mesoscale Discussion | SPC | Archer, Clay, Collin, Cooke, Dallas, Delta and 22 more | 66 min |
| Dec 29, 1:37 PM CST | Tornado Watch | SPC | Archer, Baylor, Clay, Collin, Cooke, Dallas and 19 more | 6 hr |
| Dec 29, 3:24 PM CST | Mesoscale Discussion | SPC | Anderson, Aransas, Archer, Atascosa, Austin, Bastrop and 92 more | 2 hr |
| Dec 29, 5:09 PM CST | Mesoscale Discussion | SPC | Anderson, Angelina, Aransas, Austin, Bastrop, Bee and 75 more | 36 min |
Nearby
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.