Alert archive / Texas / Tornado Watches in 2007
Tornado Watch 254
The Storm Prediction Center issued this tornado watch at May 7, 2007, 6:42 PM CDT for 6 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 7, 2007, 6:42 PM CDT (23:42 UTC)
- Expired
- May 7, 2007, 11:22 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
Counties Brewster County, TX, Jeff Davis County, TX, Pecos County, TX, Presidio County, TX, Reeves County, TX, Terrell County, TX
The radar
The Midland/Odessa radar (KMAF), 227 km from the middle of the area, began a volume at 23:45 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
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 20%
- 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
- 30%
- Six or more combined severe hail and wind reports
- 50%
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, 11.7 hours before the alert went out and 277 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
- 3147 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 532 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 125 m²/s²
- Significant tornado parameter
- 1.7
- Supercell composite
- 7.5
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 6, 7:04 PM CDT | Mesoscale Discussion | SPC | Crockett, Irion, Reagan, Terrell, Upton | 56 min |
| May 6, 7:55 PM CDT | Tornado Watch | SPC | Coke, Coleman, Concho, Crockett, Glasscock, Howard and 13 more | 6 hr |
| May 6, 10:20 PM CDT | Mesoscale Discussion | SPC | Concho, Irion, Reagan, Tom Green | 55 min |
| May 6, 11:04 PM CDT | Mesoscale Discussion | SPC | Archer, Clay, Cooke, Fannin, Grayson, Lamar and 3 more | 56 min |
| May 6, 11:54 PM CDT | Tornado Watch | SPC | Archer, Baylor, Clay, Wichita, Wilbarger | 5 hr |
| May 7, 4:30 AM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Wichita, Wilbarger | 30 min |
| May 7, 10:29 AM CDT | Mesoscale Discussion | SPC | Collin, Cooke, Denton, Fannin, Grayson, Jack and 4 more | 2 hr |
| May 7, 10:51 AM CDT | Tornado Watch | SPC | Collin, Cooke, Denton, Fannin, Grayson, Lamar and 2 more | 5 hr |
| May 7, 1:14 PM CDT | Mesoscale Discussion | SPC | Crockett, Edwards, Irion, Kimble, Kinney, Menard and 6 more | 61 min |
| May 7, 1:59 PM CDT | Mesoscale Discussion | SPC | Crockett, Edwards, Irion, Kimble, Kinney, Menard and 6 more | 61 min |
| May 7, 5:38 PM CDT | Mesoscale Discussion | SPC | Dimmit, Kinney, Maverick, Uvalde, Zavala | 67 min |
| May 7, 5:59 PM CDT | Tornado Watch | SPC | Bandera, Dimmit, Edwards, Frio, Kerr, Kinney and 8 more | 8 hr |
| May 7, 6:19 PM CDT | Mesoscale Discussion | SPC | Brewster, Crane, Ector, Jeff Davis, Midland, Pecos and 7 more | 86 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.