Alert archive / Texas / Severe Thunderstorm Watches in 2019
Severe Thunderstorm Watch 99
The Storm Prediction Center issued this severe thunderstorm watch at Apr 24, 2019, 4:49 PM CDT for 16 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2019, 4:49 PM CDT (21:49 UTC)
- Expired
- Apr 24, 2019, 9:56 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 55 kt
Counties Austin County, TX, Brazos County, TX, Burleson County, TX, Colorado County, TX, Grimes County, TX, Houston County, TX, Leon County, TX, Madison County, TX, Montgomery County, TX, Polk County, TX, Robertson County, TX, San Jacinto County, TX, Trinity County, TX, Walker County, TX, Waller County, TX, Washington County, TX
The radar
The Ft Hood radar (KGRK), 136 km from the middle of the area, began a volume at 21:49 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
- 10%
- Ten or more severe wind reports
- 40%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 10%
- One or more hailstones of 2 inches or more
- 10%
- 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 |
|---|---|---|---|---|
| Apr 24, 4:50 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Burleson | 55 min |
| Apr 24, 4:56 PM CDT | Severe Thunderstorm Warning | FWD | Milam, Robertson | 64 min |
| Apr 24, 5:07 PM CDT | Tornado Warning | FWD | Milam, Robertson | 38 min |
| Apr 24, 5:13 PM CDT | Tornado Warning | HGX | Brazos, Burleson | 32 min |
| Apr 24, 5:41 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Grimes, Madison, Walker | 49 min |
| Apr 24, 5:51 PM CDT | Tornado Warning | HGX | Madison | 39 min |
| Apr 24, 6:53 PM CDT | Severe Thunderstorm Warning | HGX | Grimes, Madison, Walker | 37 min |
| Apr 24, 8:00 PM CDT | Tornado Warning | HGX | Walker | 30 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
Fort Worth, TX (KFWD), launched 12:00Z, 9.8 hours before the alert went out and 256 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1752 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 181 m²/s²
- 0-3 km storm-relative helicity
- 126 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 23, 7:58 PM CDT | Mesoscale Discussion | SPC | Brewster, Culberson, Jeff Davis, Loving, Presidio, Reeves and 2 more | 47 min |
| Apr 23, 8:35 PM CDT | Mesoscale Discussion | SPC | Brown, Callahan, Coke, Coleman, Comanche, Crane and 23 more | 55 min |
| Apr 23, 10:06 PM CDT | Mesoscale Discussion | SPC | Bandera, Blanco, Bosque, Brewster, Brown, Burnet and 49 more | 54 min |
| Apr 23, 10:42 PM CDT | Severe Thunderstorm Watch | SPC | Bosque, Brewster, Brown, Coleman, Collin, Comanche and 32 more | 6 hr |
| Apr 23, 11:50 PM CDT | Mesoscale Discussion | SPC | Irion, Reagan, Tom Green | 85 min |
| Apr 24, 2:16 AM CDT | Mesoscale Discussion | SPC | Bosque, Brewster, Brown, Callahan, Coke, Coleman and 27 more | 89 min |
| Apr 24, 10:11 AM CDT | Mesoscale Discussion | SPC | Atascosa, Austin, Bandera, Bastrop, Bee, Bell and 60 more | 2 hr |
| Apr 24, 11:51 AM CDT | Severe Thunderstorm Watch | SPC | Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 25 more | 7 hr |
| Apr 24, 2:31 PM CDT | Mesoscale Discussion | SPC | Atascosa, Austin, Bandera, Bastrop, Bee, Bell and 39 more | 89 min |
| Apr 24, 3:47 PM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Bastrop, Brazos, Burleson, Cherokee and 19 more | 43 min |
| Apr 24, 5:23 PM CDT | Mesoscale Discussion | SPC | Aransas, Bee, Calhoun, Duval, Goliad, Jackson and 9 more | 67 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.