Alert archive / Texas / Severe Thunderstorm Watches in 2019
Severe Thunderstorm Watch 41
The Storm Prediction Center issued this severe thunderstorm watch at Apr 7, 2019, 7:11 AM CDT for 23 counties in Texas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 7, 2019, 7:11 AM CDT (12:11 UTC)
- Expired
- Apr 7, 2019, 3:00 PM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 23 counties
Austin County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Grimes County, TX, Harris County, TX, Houston County, TX, Jackson County, TX, Liberty County, TX, Madison County, TX, Matagorda County, TX, Montgomery County, TX, Polk County, TX, San Jacinto County, TX, Trinity County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 96 km from the middle of the area, began a volume at 12:11 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
- 50%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 40%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
14 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 7, 10:14 AM CDT | Severe Thunderstorm Warning | HGX | Jackson, Matagorda, Wharton | 31 min |
| Apr 7, 11:05 AM CDT | Severe Thunderstorm Warning | HGX | Austin, Brazoria, Colorado, Fort Bend, Matagorda, Wharton | 40 min |
| Apr 7, 11:12 AM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Matagorda | 48 min |
| Apr 7, 11:23 AM CDT | Severe Thunderstorm Warning | HGX | Austin, Brazoria, Colorado, Fort Bend, Harris, Matagorda and 2 more | 52 min |
| Apr 7, 12:04 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Brazoria, Fort Bend, Galveston, Grimes, Harris and 4 more | 41 min |
| Apr 7, 12:20 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Burleson, Grimes, Madison, Montgomery, San Jacinto and 3 more | 40 min |
| Apr 7, 12:35 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Fort Bend, Galveston, Grimes, Harris, Montgomery and 2 more | 25 min |
| Apr 7, 12:44 PM CDT | Tornado Warning | HGX | Chambers, Harris, Liberty | 16 min |
| Apr 7, 12:54 PM CDT | Tornado Warning | HGX | Montgomery, San Jacinto, Walker | 21 min |
| Apr 7, 12:58 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Chambers, Galveston, Grimes, Harris, Liberty and 5 more | 47 min |
| Apr 7, 1:35 PM CDT | Severe Thunderstorm Warning | HGX | Chambers, Galveston, Harris, Liberty, Montgomery, Polk and 3 more | 55 min |
| Apr 7, 1:46 PM CDT | Severe Thunderstorm Warning | HGX | Houston, Madison, San Jacinto, Trinity, Walker | 44 min |
| Apr 7, 1:48 PM CDT | Tornado Warning | HGX | Houston, San Jacinto, Trinity, Walker | 27 min |
| Apr 7, 2:01 PM CDT | Severe Thunderstorm Warning | HGX | Houston, Liberty, Madison, Polk, San Jacinto, Trinity and 1 more | 44 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
Corpus Christi, TX (KCRP), launched 12:00Z, 0.2 hours before the alert went out and 266 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
- 2894 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 528 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 251 m²/s²
- 0-3 km storm-relative helicity
- 309 m²/s²
- Significant tornado parameter
- 4.4
- Supercell composite
- 17.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 7:44 PM CDT | Mesoscale Discussion | SPC | Angelina, Brazos, Burleson, Grimes, Houston, Lee and 10 more | 2 hr |
| Apr 7, 1:00 AM CDT | Mesoscale Discussion | SPC | Aransas, Atascosa, Bee, Bexar, DeWitt, Dimmit and 19 more | 90 min |
| Apr 7, 1:55 AM CDT | Severe Thunderstorm Watch | SPC | Aransas, Atascosa, Bee, Bexar, Brooks, Calhoun and 32 more | 7 hr |
| Apr 7, 5:29 AM CDT | Mesoscale Discussion | SPC | Anderson, Bowie, Camp, Cass, Cherokee, Gregg and 12 more | 2 hr |
| Apr 7, 6:41 AM CDT | Mesoscale Discussion | SPC | Aransas, Atascosa, Austin, Bastrop, Bee, Bexar and 38 more | 94 min |
| Apr 7, 11:13 AM CDT | Mesoscale Discussion | SPC | Austin, Brazoria, Calhoun, Colorado, Fort Bend, Galveston and 13 more | 92 min |
| Apr 7, 12:27 PM CDT | Mesoscale Discussion | SPC | Angelina, Hardin, Jasper, Jefferson, Nacogdoches, Newton and 7 more | 93 min |
| Apr 7, 1:11 PM CDT | Severe Thunderstorm Watch | SPC | Angelina, Bowie, Camp, Cass, Cherokee, Franklin and 20 more | 6 hr |
| Apr 7, 2:49 PM CDT | Mesoscale Discussion | SPC | Angelina, Chambers, Hardin, Jasper, Jefferson, Nacogdoches and 7 more | 86 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.