Alert archive / Texas / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 387
The Storm Prediction Center issued this severe thunderstorm watch at Jul 1, 2017, 2:34 AM CDT for 20 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 1, 2017, 2:34 AM CDT (07:34 UTC)
- Expired
- Jul 1, 2017, 7:47 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 65 kt
Counties Borden County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Crosby County, TX, Dawson County, TX, Dickens County, TX, Fisher County, TX, Garza County, TX, Howard County, TX, Jones County, TX, Kent County, TX, Lynn County, TX, Mitchell County, TX, Nolan County, TX, Runnels County, TX, Scurry County, TX, Shackelford County, TX, Stonewall County, TX, Taylor County, TX
The radar
The Lubbock radar (KLBB), 141 km from the middle of the area, began a volume at 07:34 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
- 10%
- One or more EF2 to EF5 tornadoes
- 2%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 30%
- 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
- 60%
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 |
|---|---|---|---|---|
| Jul 1, 2:51 AM CDT | Severe Thunderstorm Warning | LUB | Garza, Lynn | 24 min |
| Jul 1, 3:10 AM CDT | Severe Thunderstorm Warning | LUB | Garza, Kent, Lynn | 35 min |
| Jul 1, 3:42 AM CDT | Severe Thunderstorm Warning | LUB | Garza, Kent | 18 min |
| Jul 1, 3:58 AM CDT | Severe Thunderstorm Warning | SJT | Fisher, Haskell, Jones, Nolan | 47 min |
| Jul 1, 5:08 AM CDT | Severe Thunderstorm Warning | SJT | Haskell, Jones, Shackelford, Throckmorton | 37 min |
| Jul 1, 5:39 AM CDT | Severe Thunderstorm Warning | SJT | Callahan, Shackelford, Taylor | 51 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 00:00Z, 7.6 hours before the alert went out and 143 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
- 1117 J/kg
- Mixed-layer CIN
- -1 J/kg
- Mixed-layer LCL
- 3339 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 18 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 7:51 PM CDT | Mesoscale Discussion | SPC | Armstrong, Bailey, Briscoe, Carson, Castro, Childress and 30 more | 114 min |
| Jun 30, 10:24 PM CDT | Mesoscale Discussion | SPC | Foard, Hardeman, Knox, Wichita, Wilbarger | 66 min |
| Jun 30, 11:58 PM CDT | Mesoscale Discussion | SPC | Bailey, Castro, Cochran, Hale, Hockley, Lamb and 2 more | 92 min |
| Jul 1, 2:56 AM CDT | Mesoscale Discussion | SPC | Borden, Callahan, Coke, Coleman, Crosby, Dawson and 17 more | 64 min |
| Jul 1, 5:25 AM CDT | Mesoscale Discussion | SPC | Brown, Callahan, Coke, Coleman, Comanche, Eastland and 6 more | 2 hr |
| Jul 1, 11:33 AM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Camp, Cass, Cherokee, Ellis and 27 more | 117 min |
| Jul 1, 4:32 PM CDT | Mesoscale Discussion | SPC | Bailey, Cochran | 118 min |
Nearby
Severe Thunderstorm Watches in Texas, 2017Every severe thunderstorm watch in 2017
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.