Alert archive / Texas / Tornado Watches in 2006
Tornado Watch 257
The Storm Prediction Center issued this tornado watch at Apr 28, 2006, 1:28 PM CDT for 19 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 28, 2006, 1:28 PM CDT (18:28 UTC)
- Expired
- Apr 28, 2006, 7:53 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 70 kt
Counties Bandera County, TX, Blanco County, TX, Crockett County, TX, Edwards County, TX, Gillespie County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Pecos County, TX, Real County, TX, San Saba County, TX, Schleicher County, TX, Sutton County, TX, Terrell County, TX, Val Verde County, TX
The radar
The San Angelo radar (KSJT), 99 km from the middle of the area, began a volume at 18:31 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
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 50%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 2:41 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 49 min |
| Apr 28, 3:14 PM CDT | Severe Thunderstorm Warning | SJT | Crockett, Sutton | 31 min |
| Apr 28, 3:28 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 62 min |
| Apr 28, 3:37 PM CDT | Tornado Warning | EWX | Val Verde | 23 min |
| Apr 28, 3:44 PM CDT | Severe Thunderstorm Warning | SJT | Crockett, Sutton | 31 min |
| Apr 28, 3:58 PM CDT | Tornado Warning | EWX | Val Verde | 62 min |
| Apr 28, 4:15 PM CDT | Severe Thunderstorm Warning | SJT | Sutton | 45 min |
| Apr 28, 4:33 PM CDT | Tornado Warning | EWX | Edwards | 42 min |
| Apr 28, 4:54 PM CDT | Tornado Warning | SJT | Sutton | 36 min |
| Apr 28, 5:00 PM CDT | Tornado Warning | EWX | Val Verde | 15 min |
| Apr 28, 5:11 PM CDT | Tornado Warning | EWX | Edwards | 34 min |
| Apr 28, 5:26 PM CDT | Tornado Warning | SJT | Kimble, Menard, Schleicher, Sutton | 34 min |
| Apr 28, 5:45 PM CDT | Severe Thunderstorm Warning | EWX | Edwards | 28 min |
| Apr 28, 5:59 PM CDT | Tornado Warning | SJT | Kimble, Menard | 31 min |
| Apr 28, 6:10 PM CDT | Tornado Warning | EWX | Edwards | 35 min |
| Apr 28, 6:20 PM CDT | Severe Thunderstorm Warning | SJT | Kimble | 25 min |
| Apr 28, 6:31 PM CDT | Severe Thunderstorm Warning | SJT | McCulloch, Mason, Menard | 29 min |
| Apr 28, 6:38 PM CDT | Severe Thunderstorm Warning | EWX | Kerr | 37 min |
| Apr 28, 6:47 PM CDT | Severe Thunderstorm Warning | SJT | Kimble | 43 min |
| Apr 28, 7:00 PM CDT | Severe Thunderstorm Warning | SJT | McCulloch, Mason, Menard | 45 min |
| Apr 28, 7:04 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 56 min |
| Apr 28, 7:20 PM CDT | Severe Thunderstorm Warning | EWX | Gillespie | 55 min |
| Apr 28, 7:29 PM CDT | Severe Thunderstorm Warning | SJT | Kimble | 11 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 12:00Z, 6.5 hours before the alert went out and 130 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
- 1176 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 626 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 285 m²/s²
- 0-3 km storm-relative helicity
- 306 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 3.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 28, 7:03 AM CDT | Mesoscale Discussion | SPC | Dallam, Hansford, Hartley, Hutchinson, Lipscomb, Moore and 3 more | 117 min |
| Apr 28, 10:23 AM CDT | Mesoscale Discussion | SPC | Childress, Collingsworth, Cottle, Donley, Foard, Gray and 8 more | 97 min |
| Apr 28, 10:43 AM CDT | Mesoscale Discussion | SPC | Borden, Crosby, Dawson, Garza, Glasscock, Howard and 8 more | 92 min |
| Apr 28, 11:36 AM CDT | Tornado Watch | SPC | Archer, Baylor, Borden, Brown, Callahan, Childress and 39 more | 9 hr |
| Apr 28, 1:04 PM CDT | Mesoscale Discussion | SPC | Bosque, Brown, Callahan, Clay, Coleman, Collin and 33 more | 86 min |
| Apr 28, 1:13 PM CDT | Mesoscale Discussion | SPC | Bandera, Crockett, Edwards, Gillespie, Kerr, Kimble and 10 more | 62 min |
| Apr 28, 1:20 PM CDT | Mesoscale Discussion | SPC | Briscoe, Cottle, Dickens, Floyd, Foard, Hall and 7 more | 85 min |
| Apr 28, 3:38 PM CDT | Mesoscale Discussion | SPC | Childress, Coke, Cottle, Dickens, Fisher, Foard and 17 more | 2 hr |
| Apr 28, 3:42 PM CDT | Mesoscale Discussion | SPC | Bandera, Crockett, Edwards, Gillespie, Kendall, Kerr and 11 more | 2 hr |
| Apr 28, 6:07 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Childress, Clay, Cooke, Cottle and 15 more | 53 min |
| Apr 28, 6:18 PM CDT | Mesoscale Discussion | SPC | Bell, Bosque, Brazos, Brown, Burnet, Callahan and 42 more | 87 min |
| Apr 28, 6:42 PM CDT | Tornado Watch | SPC | Archer, Baylor, Bell, Bosque, Brown, Callahan and 48 more | 7 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.