Alert archive / Texas / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 72
The Storm Prediction Center issued this severe thunderstorm watch at Apr 18, 2015, 2:13 PM CDT for 64 counties in Texas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 18, 2015, 2:13 PM CDT (19:13 UTC)
- Expired
- Apr 18, 2015, 10:19 PM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 64 counties
Bandera County, TX, Bastrop County, TX, Bexar County, TX, Blanco County, TX, Bosque County, TX, Brown County, TX, Burnet County, TX, Caldwell County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Comal County, TX, Comanche County, TX, Concho County, TX, Coryell County, TX, Crockett County, TX, Eastland County, TX, Edwards County, TX, Erath County, TX, Fisher County, TX, Gillespie County, TX, Guadalupe County, TX, Hamilton County, TX, Haskell County, TX, Hays County, TX, Hood County, TX, Irion County, TX, Jack County, TX, Jones County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Lampasas County, TX, Lee County, TX, Llano County, TX, Mason County, TX, Maverick County, TX, McCulloch County, TX, Medina County, TX, Menard County, TX, Mills County, TX, Montague County, TX, Nolan County, TX, Palo Pinto County, TX, Parker County, TX, Real County, TX, Runnels County, TX, San Saba County, TX, Schleicher County, TX, Shackelford County, TX, Somervell County, TX, Stephens County, TX, Sterling County, TX, Sutton County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Travis County, TX, Uvalde County, TX, Val Verde County, TX, Williamson County, TX, Wise County, TX, Young County, TX
The radar
The San Angelo radar (KSJT), 74 km from the middle of the area, began a volume at 19:12 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
- 60%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 80%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
43 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 2:40 PM CDT | Severe Thunderstorm Warning | SJT | Schleicher | 50 min |
| Apr 18, 2:46 PM CDT | Severe Thunderstorm Warning | SJT | Throckmorton | 44 min |
| Apr 18, 2:56 PM CDT | Severe Thunderstorm Warning | SJT | Concho, Tom Green | 49 min |
| Apr 18, 2:57 PM CDT | Severe Thunderstorm Warning | SJT | Kimble, McCulloch, Mason, Menard | 48 min |
| Apr 18, 2:58 PM CDT | Severe Thunderstorm Warning | SJT | Shackelford | 20 min |
| Apr 18, 3:08 PM CDT | Severe Thunderstorm Warning | SJT | Concho, Menard, Schleicher, Tom Green | 52 min |
| Apr 18, 3:12 PM CDT | Severe Thunderstorm Warning | SJT | Concho, McCulloch, Menard | 48 min |
| Apr 18, 3:16 PM CDT | Severe Thunderstorm Warning | FWD | Stephens, Young | 44 min |
| Apr 18, 3:23 PM CDT | Severe Thunderstorm Warning | SJT | Throckmorton | 28 min |
| Apr 18, 3:38 PM CDT | Tornado Warning | SJT | Kimble, Mason, Menard | 27 min |
| Apr 18, 3:40 PM CDT | Severe Thunderstorm Warning | SJT | Coleman, Concho, McCulloch | 50 min |
| Apr 18, 3:57 PM CDT | Severe Thunderstorm Warning | FWD | Palo Pinto, Stephens, Young | 63 min |
| Apr 18, 4:02 PM CDT | Severe Thunderstorm Warning | SJT | Concho, McCulloch, Menard | 28 min |
| Apr 18, 4:14 PM CDT | Severe Thunderstorm Warning | EWX | Bandera, Kendall, Kerr | 33 min |
| Apr 18, 4:15 PM CDT | Severe Thunderstorm Warning | SJT | Brown, Callahan, Coleman, McCulloch | 45 min |
| Apr 18, 4:31 PM CDT | Severe Thunderstorm Warning | SJT | Concho, Kimble, McCulloch, Mason, Menard, San Saba | 44 min |
| Apr 18, 4:48 PM CDT | Severe Thunderstorm Warning | FWD | Palo Pinto | 57 min |
| Apr 18, 4:52 PM CDT | Severe Thunderstorm Warning | SJT | Callahan, Jones, Shackelford | 38 min |
| Apr 18, 4:58 PM CDT | Severe Thunderstorm Warning | EWX | Kendall | 47 min |
| Apr 18, 5:07 PM CDT | Severe Thunderstorm Warning | FWD | Comanche | 53 min |
| Apr 18, 5:13 PM CDT | Severe Thunderstorm Warning | SJT | San Saba | 47 min |
| Apr 18, 5:34 PM CDT | Flash Flood Warning | FWD | Comanche | 3 hr |
| Apr 18, 5:37 PM CDT | Severe Thunderstorm Warning | EWX | Blanco, Gillespie, Kendall, Kerr | 38 min |
| Apr 18, 5:43 PM CDT | Severe Thunderstorm Warning | FWD | Palo Pinto, Parker | 62 min |
| Apr 18, 5:45 PM CDT | Severe Thunderstorm Warning | SJT | Kimble, Menard, Sutton | 45 min |
| Apr 18, 5:49 PM CDT | Severe Thunderstorm Warning | FWD | Comanche, Hamilton, Mills | 56 min |
| Apr 18, 6:00 PM CDT | Severe Thunderstorm Warning | FWD | Lampasas | 60 min |
| Apr 18, 6:02 PM CDT | Severe Thunderstorm Warning | FWD | Erath | 47 min |
| Apr 18, 6:05 PM CDT | Flash Flood Warning | FWD | Palo Pinto | 3 hr |
| Apr 18, 6:10 PM CDT | Severe Thunderstorm Warning | EWX | Blanco, Gillespie, Llano | 50 min |
| Apr 18, 6:13 PM CDT | Severe Thunderstorm Warning | SJT | Mason, Menard | 47 min |
| Apr 18, 6:24 PM CDT | Severe Thunderstorm Warning | FWD | Hood, Somervell | 66 min |
| Apr 18, 6:29 PM CDT | Severe Thunderstorm Warning | SJT | Kimble, McCulloch, Mason, Menard | 46 min |
| Apr 18, 6:30 PM CDT | Severe Thunderstorm Warning | EWX | Gillespie, Llano | 30 min |
| Apr 18, 6:41 PM CDT | Severe Thunderstorm Warning | FWD | Parker | 64 min |
| Apr 18, 6:44 PM CDT | Tornado Warning | FWD | Hood, Parker | 19 min |
| Apr 18, 6:45 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Llano | 30 min |
| Apr 18, 7:01 PM CDT | Severe Thunderstorm Warning | EWX | Llano | 29 min |
| Apr 18, 7:07 PM CDT | Severe Thunderstorm Warning | SJT | Mason | 23 min |
| Apr 18, 7:08 PM CDT | Flash Flood Warning | FWD | Parker | 3 hr |
| Apr 18, 8:18 PM CDT | Severe Thunderstorm Warning | EWX | Blanco, Hays | 27 min |
| Apr 18, 8:44 PM CDT | Severe Thunderstorm Warning | EWX | Blanco, Burnet, Hays, Travis | 31 min |
| Apr 18, 9:13 PM CDT | Severe Thunderstorm Warning | EWX | Travis | 32 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 (KDLF), launched 12:00Z, 7.2 hours before the alert went out and 195 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
- 668 J/kg
- Mixed-layer CIN
- -134 J/kg
- Mixed-layer LCL
- 705 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- -48 m²/s²
- 0-3 km storm-relative helicity
- 81 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.4
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 7:26 PM CDT | Mesoscale Discussion | SPC | Carson, Hansford, Hutchinson, Ochiltree, Roberts | 2 hr |
| Apr 17, 7:39 PM CDT | Mesoscale Discussion | SPC | Chambers, Galveston, Jefferson | 96 min |
| Apr 17, 9:10 PM CDT | Mesoscale Discussion | SPC | Aransas, Brooks, Calhoun, Duval, Hidalgo, Jim Hogg and 7 more | 95 min |
| Apr 17, 9:13 PM CDT | Severe Thunderstorm Watch | SPC | Brazoria, Chambers, Fort Bend, Galveston, Hardin, Harris and 4 more | 5 hr |
| Apr 17, 10:59 PM CDT | Mesoscale Discussion | SPC | Aransas, Brooks, Hidalgo, Kenedy, Kleberg, Nueces | 91 min |
| Apr 17, 11:31 PM CDT | Mesoscale Discussion | SPC | Chambers, Galveston, Jefferson, Orange | 59 min |
| Apr 18, 1:52 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Brown, Callahan, Clay, Coleman and 23 more | 113 min |
| Apr 18, 2:27 PM CDT | Tornado Watch | SPC | Archer, Baylor, Childress, Clay, Collingsworth, Cottle and 9 more | 6 hr |
| Apr 18, 4:32 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bastrop, Bexar, Caldwell, Comal, Dimmit and 11 more | 2 hr |
| Apr 18, 4:48 PM CDT | Mesoscale Discussion | SPC | Hidalgo, Kenedy, Kleberg, Willacy | 2 hr |
| Apr 18, 5:23 PM CDT | Mesoscale Discussion | SPC | Collin, Dallas, Ellis, Falls, Hill, Kaufman and 6 more | 3 hr |
| Apr 18, 5:46 PM CDT | Severe Thunderstorm Watch | SPC | Anderson, Bell, Collin, Cooke, Dallas, Denton and 20 more | 5 hr |
| Apr 18, 6:03 PM CDT | Mesoscale Discussion | SPC | Baylor, Childress, Collingsworth, Cottle, Foard, Hardeman and 3 more | 87 min |
| Apr 18, 6:40 PM CDT | Mesoscale Discussion | SPC | Bandera, Bell, Blanco, Bosque, Brown, Burnet and 48 more | 95 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.