Alert archive / Texas / Severe Thunderstorm Watches in 2007
Severe Thunderstorm Watch 199
The Storm Prediction Center issued this severe thunderstorm watch at Apr 29, 2007, 4:56 PM CDT for 30 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 29, 2007, 4:56 PM CDT (21:56 UTC)
- Expired
- Apr 29, 2007, 11:00 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 30 counties
Baylor County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Concho County, TX, Ector County, TX, Fisher County, TX, Foard County, TX, Glasscock County, TX, Hardeman County, TX, Haskell County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Menard County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Runnels County, TX, Scurry County, TX, Shackelford County, TX, Sterling County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Wilbarger County, TX
The radar
The San Angelo radar (KSJT), 108 km from the middle of the area, began a volume at 21:58 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
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 20%
- 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
- 60%
Warnings issued inside it
29 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 4:57 PM CDT | Severe Thunderstorm Warning | SJT | Coke, Nolan, Runnels, Taylor | 63 min |
| Apr 29, 5:07 PM CDT | Flash Flood Warning | MAF | Midland | 3 hr |
| Apr 29, 5:13 PM CDT | Severe Thunderstorm Warning | SJT | Jones | 62 min |
| Apr 29, 5:16 PM CDT | Severe Thunderstorm Warning | MAF | Midland | 59 min |
| Apr 29, 5:16 PM CDT | Severe Thunderstorm Warning | SJT | Irion, Sterling, Tom Green | 59 min |
| Apr 29, 5:36 PM CDT | Severe Thunderstorm Warning | MAF | Glasscock | 54 min |
| Apr 29, 5:47 PM CDT | Severe Thunderstorm Warning | SJT | Haskell, Shackelford, Throckmorton | 58 min |
| Apr 29, 6:08 PM CDT | Severe Thunderstorm Warning | SJT | Coke, Nolan | 52 min |
| Apr 29, 6:15 PM CDT | Flash Flood Warning | SJT | Haskell, Jones, Shackelford, Throckmorton | 3 hr |
| Apr 29, 6:29 PM CDT | Severe Thunderstorm Warning | MAF | Howard | 61 min |
| Apr 29, 6:46 PM CDT | Severe Thunderstorm Warning | SJT | Shackelford, Throckmorton | 59 min |
| Apr 29, 6:56 PM CDT | Flash Flood Warning | MAF | Ector | 5 hr |
| Apr 29, 6:59 PM CDT | Severe Thunderstorm Warning | MAF | Glasscock | 46 min |
| Apr 29, 7:22 PM CDT | Flash Flood Warning | MAF | Howard | 4 hr |
| Apr 29, 7:29 PM CDT | Severe Thunderstorm Warning | MAF | Howard | 61 min |
| Apr 29, 7:54 PM CDT | Flash Flood Warning | MAF | Midland | 3 hr |
| Apr 29, 8:02 PM CDT | Severe Thunderstorm Warning | SJT | Coke, Nolan | 43 min |
| Apr 29, 8:23 PM CDT | Flash Flood Warning | MAF | Mitchell | 4 hr |
| Apr 29, 8:36 PM CDT | Severe Thunderstorm Warning | MAF | Midland | 24 min |
| Apr 29, 8:45 PM CDT | Severe Thunderstorm Warning | SJT | Nolan, Taylor | 30 min |
| Apr 29, 8:49 PM CDT | Severe Thunderstorm Warning | MAF | Glasscock | 56 min |
| Apr 29, 9:15 PM CDT | Severe Thunderstorm Warning | SJT | Taylor | 60 min |
| Apr 29, 9:24 PM CDT | Severe Thunderstorm Warning | SJT | Callahan | 51 min |
| Apr 29, 10:06 PM CDT | Flash Flood Warning | SJT | Callahan, Jones, Shackelford, Taylor | 3 hr |
| Apr 29, 10:15 PM CDT | Severe Thunderstorm Warning | SJT | Jones, Shackelford | 60 min |
| Apr 29, 10:29 PM CDT | Severe Thunderstorm Warning | SJT | Tom Green | 46 min |
| Apr 29, 10:34 PM CDT | Severe Thunderstorm Warning | SJT | Taylor | 56 min |
| Apr 29, 10:43 PM CDT | Severe Thunderstorm Warning | SJT | Coke | 47 min |
| Apr 29, 11:00 PM CDT | Severe Thunderstorm Warning | SJT | Nolan | 60 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
Midland Regional, TX (KMAF), launched 12:00Z, 9.9 hours before the alert went out and 168 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
- 996 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 603 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 12:59 AM CDT | Mesoscale Discussion | SPC | Dimmit, Kinney, Maverick, Zavala | 2 hr |
| Apr 29, 5:11 AM CDT | Mesoscale Discussion | SPC | Brewster, Crockett, Jeff Davis, Pecos, Presidio, Terrell and 2 more | 2 hr |
| Apr 29, 7:43 AM CDT | Mesoscale Discussion | SPC | Andrews, Brewster, Crane, Crockett, Ector, Glasscock and 16 more | 3 hr |
| Apr 29, 12:03 PM CDT | Mesoscale Discussion | SPC | Brewster, Crane, Crockett, Culberson, Hudspeth, Jeff Davis and 6 more | 57 min |
| Apr 29, 12:34 PM CDT | Tornado Watch | SPC | Brewster, Crane, Crockett, Culberson, Jeff Davis, Loving and 11 more | 7 hr |
| Apr 29, 3:12 PM CDT | Mesoscale Discussion | SPC | Brewster, Crane, Crockett, Culberson, Jeff Davis, Loving and 11 more | 63 min |
| Apr 29, 3:50 PM CDT | Mesoscale Discussion | SPC | Andrews, Borden, Coke, Crosby, Dawson, Dickens and 21 more | 55 min |
| Apr 29, 6:34 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Bexar, Blanco, Comal, Dimmit and 20 more | 86 min |
Nearby
Severe Thunderstorm Watches in Texas, 2007Every severe thunderstorm 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.