Alert archive / Texas / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 192
The Storm Prediction Center issued this severe thunderstorm watch at May 20, 2015, 5:29 PM CDT for 19 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 20, 2015, 5:29 PM CDT (22:29 UTC)
- Expired
- May 20, 2015, 11:03 PM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
Counties Brewster County, TX, Concho County, TX, Crane County, TX, Crockett County, TX, Edwards County, TX, Irion County, TX, Kimble County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Pecos County, TX, Presidio County, TX, Reagan County, TX, Schleicher County, TX, Sutton County, TX, Terrell County, TX, Tom Green County, TX, Upton County, TX, Val Verde County, TX
The radar
The San Angelo radar (KSJT), 123 km from the middle of the area, began a volume at 22:31 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
- 20%
- One or more EF2 to EF5 tornadoes
- 2%
- 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
- 60%
Warnings issued inside it
8 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 20, 5:37 PM CDT | Severe Thunderstorm Warning | SJT | Irion, Schleicher, Tom Green | 53 min |
| May 20, 5:42 PM CDT | Severe Thunderstorm Warning | MAF | Pecos | 63 min |
| May 20, 5:51 PM CDT | Severe Thunderstorm Warning | MAF | Brewster | 24 min |
| May 20, 6:52 PM CDT | Severe Thunderstorm Warning | SJT | Schleicher | 53 min |
| May 20, 7:24 PM CDT | Severe Thunderstorm Warning | SJT | Schleicher, Sutton | 42 min |
| May 20, 8:28 PM CDT | Severe Thunderstorm Warning | SJT | Crockett, Sutton | 41 min |
| May 20, 8:52 PM CDT | Severe Thunderstorm Warning | EWX | Edwards | 38 min |
| May 20, 9:03 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Val Verde | 42 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, 10.5 hours before the alert went out and 146 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
- 1293 J/kg
- Mixed-layer CIN
- -75 J/kg
- Mixed-layer LCL
- 774 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 152 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 7:15 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Callahan, Clay, Cooke, Eastland and 11 more | 90 min |
| May 19, 8:58 PM CDT | Tornado Watch | SPC | Archer, Baylor, Clay, Foard, Hardeman, Knox and 2 more | 5 hr |
| May 19, 9:18 PM CDT | Mesoscale Discussion | SPC | Comanche, Cooke, Denton, Eastland, Erath, Hood and 9 more | 87 min |
| May 19, 11:15 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Cooke, Cottle, Fannin and 8 more | 90 min |
| May 20, 1:10 AM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Clay, Cooke, Foard, Knox and 3 more | 95 min |
| May 20, 1:35 PM CDT | Mesoscale Discussion | SPC | Crane, Pecos, Terrell, Upton | 2 hr |
| May 20, 5:07 PM CDT | Mesoscale Discussion | SPC | Brewster, Crockett, Edwards, Kerr, Kimble, Kinney and 7 more | 53 min |
Nearby
Severe Thunderstorm Watches in Texas, 2015Every severe thunderstorm watch in 2015
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.