Alert archive / Texas / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 104
The Storm Prediction Center issued this severe thunderstorm watch at Apr 24, 2015, 6:53 PM CDT for 25 counties in Texas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2015, 6:53 PM CDT (23:53 UTC)
- Expired
- Apr 25, 2015, 12:26 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 25 counties
Atascosa County, TX, Bee County, TX, Brooks County, TX, Cameron County, TX, DeWitt County, TX, Dimmit County, TX, Duval County, TX, Frio County, TX, Gonzales County, TX, Hidalgo County, TX, Jim Hogg County, TX, Karnes County, TX, Kinney County, TX, La Salle County, TX, Lavaca County, TX, Live Oak County, TX, Maverick County, TX, McMullen County, TX, Medina County, TX, Starr County, TX, Uvalde County, TX, Webb County, TX, Wilson County, TX, Zapata County, TX, Zavala County, TX
The radar
The Laughlin AFB radar (KDFX), 114 km from the middle of the area, began a volume at 23:53 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
- 30%
- One or more gusts of 65 knots or more
- 20%
- 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%
Warnings issued inside it
15 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 7:00 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Kinney, Uvalde | 30 min |
| Apr 24, 7:05 PM CDT | Severe Thunderstorm Warning | EWX | Dimmit, Maverick, Zavala | 55 min |
| Apr 24, 7:09 PM CDT | Severe Thunderstorm Warning | EWX | Dimmit | 36 min |
| Apr 24, 7:40 PM CDT | Severe Thunderstorm Warning | EWX | Dimmit | 35 min |
| Apr 24, 7:53 PM CDT | Tornado Warning | EWX | Dimmit, Zavala | 22 min |
| Apr 24, 7:55 PM CDT | Severe Thunderstorm Warning | CRP | La Salle, Webb | 35 min |
| Apr 24, 8:30 PM CDT | Severe Thunderstorm Warning | CRP | La Salle | 45 min |
| Apr 24, 8:42 PM CDT | Severe Thunderstorm Warning | EWX | Frio | 63 min |
| Apr 24, 8:47 PM CDT | Severe Thunderstorm Warning | CRP | La Salle, McMullen | 43 min |
| Apr 24, 9:10 PM CDT | Tornado Warning | EWX | Atascosa, Frio | 50 min |
| Apr 24, 9:29 PM CDT | Severe Thunderstorm Warning | CRP | Live Oak, McMullen | 28 min |
| Apr 24, 9:55 PM CDT | Severe Thunderstorm Warning | EWX | Atascosa, Karnes, Wilson | 31 min |
| Apr 24, 10:36 PM CDT | Severe Thunderstorm Warning | BRO | Hidalgo | 24 min |
| Apr 24, 10:52 PM CDT | Severe Thunderstorm Warning | BRO | Cameron, Hidalgo | 38 min |
| Apr 24, 11:24 PM CDT | Severe Thunderstorm Warning | BRO | Cameron, Hidalgo, Willacy | 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
Del Rio, TX (KDLF), launched 12:00Z, 11.9 hours before the alert went out and 159 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
- 33 J/kg
- Mixed-layer CIN
- -362 J/kg
- Mixed-layer LCL
- 745 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 252 m²/s²
- 0-3 km storm-relative helicity
- 330 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 9:34 PM CDT | Mesoscale Discussion | SPC | Bandera, Dimmit, Edwards, Frio, Jim Hogg, Kinney and 10 more | 56 min |
| Apr 24, 2:36 AM CDT | Mesoscale Discussion | SPC | Dimmit, La Salle, McMullen, Webb, Zavala | 84 min |
| Apr 24, 3:01 AM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Dimmit, Frio, La Salle, Live Oak, McMullen and 5 more | 4 hr |
| Apr 24, 5:41 AM CDT | Mesoscale Discussion | SPC | Atascosa, Bandera, Dimmit, Duval, Edwards, Frio and 10 more | 94 min |
| Apr 24, 10:29 AM CDT | Mesoscale Discussion | SPC | Hardin, Jasper, Liberty, Newton, Orange, Tyler | 91 min |
| Apr 24, 11:12 AM CDT | Mesoscale Discussion | SPC | Bosque, Brown, Callahan, Coke, Coleman, Collin and 43 more | 2 hr |
| Apr 24, 11:53 AM CDT | Mesoscale Discussion | SPC | Hardin, Jefferson, Newton, Orange | 97 min |
| Apr 24, 12:18 PM CDT | Tornado Watch | SPC | Jasper, Newton, Orange | 5 hr |
| Apr 24, 12:56 PM CDT | Mesoscale Discussion | SPC | Childress, Collingsworth, Cottle, Crosby, Dickens, Foard and 3 more | 94 min |
| Apr 24, 2:10 PM CDT | Tornado Watch | SPC | Anderson, Bell, Bosque, Brown, Callahan, Coke and 52 more | 8 hr |
| Apr 24, 3:58 PM CDT | Mesoscale Discussion | SPC | Angelina, Camp, Cass, Cherokee, Gregg, Harrison and 16 more | 92 min |
| Apr 24, 4:45 PM CDT | Tornado Watch | SPC | Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 20 more | 5 hr |
| Apr 24, 4:56 PM CDT | Mesoscale Discussion | SPC | Atascosa, Dimmit, Duval, Frio, Jim Hogg, Kinney and 9 more | 94 min |
| Apr 24, 6:01 PM CDT | Mesoscale Discussion | SPC | Dallas, Ellis, Erath, Hood, Johnson, Kaufman and 3 more | 59 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.