Alert archive / Texas / Tornado Watches in 2006
Tornado Watch 870
The Storm Prediction Center issued this tornado watch at Nov 29, 2006, 8:47 PM CST for 15 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Nov 29, 2006, 8:47 PM CST (02:47 UTC)
- Expired
- Nov 30, 2006, 2:00 AM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
Counties Bandera County, TX, Bexar County, TX, Blanco County, TX, Burnet County, TX, Caldwell County, TX, Comal County, TX, Gillespie County, TX, Guadalupe County, TX, Hays County, TX, Kendall County, TX, Kerr County, TX, Llano County, TX, Medina County, TX, Travis County, TX, Williamson County, TX
The radar
The Austin/San Antonio radar (KEWX), 82 km from the middle of the area, began a volume at 02:48 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
- 40%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 10%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 40%
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 29, 8:58 PM CST | Severe Thunderstorm Warning | EWX | Bandera | 62 min |
| Nov 29, 9:17 PM CST | Tornado Warning | EWX | Bandera | 28 min |
| Nov 29, 9:33 PM CST | Tornado Warning | EWX | Medina | 27 min |
| Nov 29, 9:52 PM CST | Severe Thunderstorm Warning | EWX | Bexar, Kendall | 53 min |
| Nov 29, 10:21 PM CST | Severe Thunderstorm Warning | EWX | Comal | 54 min |
| Nov 29, 11:10 PM CST | Severe Thunderstorm Warning | EWX | Comal | 65 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
Del Rio, TX (KDRT), launched 00:00Z, 2.8 hours before the alert went out and 226 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
- 545 J/kg
- Mixed-layer CIN
- -93 J/kg
- Mixed-layer LCL
- 1291 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 34 m²/s²
- 0-3 km storm-relative helicity
- 62 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 0.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 29, 6:33 PM CST | Mesoscale Discussion | SPC | Bosque, Brown, Coleman, Collin, Comanche, Dallas and 21 more | 57 min |
| Nov 29, 8:48 PM CST | Mesoscale Discussion | SPC | Bandera, Bexar, Blanco, Comal, Gillespie, Hays and 2 more | 57 min |
| Nov 29, 10:25 PM CST | Mesoscale Discussion | SPC | Armstrong, Briscoe, Carson, Castro, Deaf Smith, Donley and 11 more | 2 hr |
| Nov 30, 1:25 AM CST | Mesoscale Discussion | SPC | Bandera, Bastrop, Bexar, Blanco, Burnet, Caldwell and 16 more | 65 min |
| Nov 30, 2:43 AM CST | Mesoscale Discussion | SPC | Archer, Baylor, Callahan, Childress, Clay, Coke and 35 more | 6 hr |
| Nov 30, 6:59 AM CST | Mesoscale Discussion | SPC | Bell, Bosque, Burnet, Collin, Coryell, Dallas and 13 more | 4 hr |
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.