Alert archive / Texas / Severe Thunderstorm Watches in 2019
Severe Thunderstorm Watch 79
The Storm Prediction Center issued this severe thunderstorm watch at Apr 17, 2019, 7:18 PM CDT for 43 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 17, 2019, 7:18 PM CDT (00:18 UTC)
- Expired
- Apr 18, 2019, 2:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 43 counties
Atascosa County, TX, Bandera County, TX, Bastrop County, TX, Bexar County, TX, Blanco County, TX, Brown County, TX, Burnet County, TX, Caldwell County, TX, Coleman County, TX, Comal County, TX, Concho County, TX, DeWitt County, TX, Dimmit County, TX, Edwards County, TX, Fayette County, TX, Frio County, TX, Gillespie County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Kendall County, TX, Kerr County, TX, Kimble County, TX, Kinney County, TX, Lavaca County, TX, Lee County, TX, Llano County, TX, Mason County, TX, Maverick County, TX, McCulloch County, TX, Medina County, TX, Menard County, TX, Real County, TX, San Saba County, TX, Schleicher County, TX, Sutton County, TX, Travis County, TX, Uvalde County, TX, Val Verde County, TX, Williamson County, TX, Wilson County, TX, Zavala County, TX
The radar
The Austin/San Antonio radar (KEWX), 116 km from the middle of the area, began a volume at 00:21 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
- 80%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
25 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 7:26 PM CDT | Severe Thunderstorm Warning | SJT | Brown, McCulloch, San Saba | 64 min |
| Apr 17, 8:03 PM CDT | Severe Thunderstorm Warning | SJT | McCulloch, San Saba | 42 min |
| Apr 17, 8:05 PM CDT | Severe Thunderstorm Warning | SJT | Brown | 25 min |
| Apr 17, 8:10 PM CDT | Severe Thunderstorm Warning | SJT | Brown | 22 min |
| Apr 17, 8:11 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Val Verde | 64 min |
| Apr 17, 8:11 PM CDT | Severe Thunderstorm Warning | SJT | Kimble, Menard, Schleicher, Sutton | 49 min |
| Apr 17, 8:19 PM CDT | Severe Thunderstorm Warning | SJT | San Saba | 26 min |
| Apr 17, 8:38 PM CDT | Severe Thunderstorm Warning | SJT | Coleman, Concho, McCulloch, San Saba | 54 min |
| Apr 17, 8:44 PM CDT | Severe Thunderstorm Warning | SJT | Brown | 61 min |
| Apr 17, 9:04 PM CDT | Severe Thunderstorm Warning | SJT | McCulloch | 56 min |
| Apr 17, 9:14 PM CDT | Severe Thunderstorm Warning | EWX | Kinney, Val Verde | 46 min |
| Apr 17, 9:30 PM CDT | Severe Thunderstorm Warning | SJT | McCulloch, Mason, San Saba | 60 min |
| Apr 17, 9:32 PM CDT | Severe Thunderstorm Warning | SJT | Kimble, Mason, Menard, San Saba | 43 min |
| Apr 17, 9:39 PM CDT | Severe Thunderstorm Warning | SJT | McCulloch, San Saba | 47 min |
| Apr 17, 9:55 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Kinney, Maverick, Real, Uvalde | 65 min |
| Apr 17, 10:21 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Llano | 54 min |
| Apr 17, 10:41 PM CDT | Severe Thunderstorm Warning | EWX | Blanco, Gillespie, Kendall, Kerr | 49 min |
| Apr 17, 10:51 PM CDT | Severe Thunderstorm Warning | EWX | Burnet, Llano, Travis, Williamson | 54 min |
| Apr 17, 10:56 PM CDT | Severe Thunderstorm Warning | EWX | Kinney, Maverick, Uvalde, Zavala | 64 min |
| Apr 17, 11:06 PM CDT | Tornado Warning | EWX | Burnet, Williamson | 24 min |
| Apr 17, 11:53 PM CDT | Severe Thunderstorm Warning | EWX | Blanco, Comal, Hays, Kendall | 41 min |
| Apr 17, 11:53 PM CDT | Severe Thunderstorm Warning | EWX | Frio, Medina, Uvalde, Zavala | 52 min |
| Apr 18, 12:59 AM CDT | Severe Thunderstorm Warning | EWX | Dimmit, Frio, Zavala | 48 min |
| Apr 18, 1:38 AM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Frio | 52 min |
| Apr 18, 1:52 AM CDT | Severe Thunderstorm Warning | EWX | DeWitt, Gonzales, Karnes, Lavaca | 53 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 00:00Z, 0.3 hours before the alert went out and 184 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
- 1900 J/kg
- Mixed-layer CIN
- -84 J/kg
- Mixed-layer LCL
- 1927 m above ground
- 0-6 km bulk shear
- 89 kt
- 0-1 km storm-relative helicity
- 112 m²/s²
- 0-3 km storm-relative helicity
- 308 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 15.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 9:30 PM CDT | Mesoscale Discussion | SPC | Bosque, Brown, Collin, Comanche, Cooke, Coryell and 27 more | 90 min |
| Apr 17, 11:52 PM CDT | Mesoscale Discussion | SPC | Atascosa, Bastrop, Bee, Bell, Bexar, Brazos and 32 more | 83 min |
| Apr 18, 12:54 AM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Austin, Bowie, Brazoria, Brazos and 53 more | 66 min |
| Apr 18, 1:09 AM CDT | Severe Thunderstorm Watch | SPC | Angelina, Bowie, Brazos, Burleson, Camp, Cass and 29 more | 7 hr |
| Apr 18, 3:51 AM CDT | Mesoscale Discussion | SPC | Angelina, Cass, Gregg, Hardin, Harrison, Jasper and 11 more | 114 min |
| Apr 18, 6:36 AM CDT | Mesoscale Discussion | SPC | Jasper, Newton, Orange, Sabine | 84 min |
Nearby
Severe Thunderstorm Watches in Texas, 2019Every severe thunderstorm watch in 2019
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.