Alert archive / Texas / Severe Thunderstorm Watches in 2015
Severe Thunderstorm Watch 71
The Storm Prediction Center issued this severe thunderstorm watch at Apr 17, 2015, 9:13 PM CDT for 9 parishes in Louisiana; 10 counties in Texas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 17, 2015, 9:13 PM CDT (02:13 UTC)
- Expired
- Apr 18, 2015, 2:00 AM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 65 kt
Counties Acadia Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Iberia Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Vermilion Parish, LA, Brazoria County, TX, Chambers County, TX, Fort Bend County, TX, Galveston County, TX, Hardin County, TX, Harris County, TX, Jefferson County, TX, Liberty County, TX, Orange County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 88 km from the middle of the area, began a volume at 02:15 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
- 2%
- Ten or more severe wind reports
- 50%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 9:21 PM CDT | Flash Flood Warning | HGX | Jackson, Wharton | 54 min |
| Apr 17, 9:36 PM CDT | Severe Thunderstorm Warning | LCH | Jefferson | 24 min |
| Apr 17, 10:12 PM CDT | Flash Flood Warning | HGX | Fort Bend, Wharton | 63 min |
| Apr 17, 10:57 PM CDT | Flash Flood Warning | HGX | Brazoria, Fort Bend, Galveston, Harris | 2 hr |
| Apr 17, 11:19 PM CDT | Flash Flood Warning | HGX | Austin, Fort Bend, Wharton | 56 min |
| Apr 17, 11:29 PM CDT | Flash Flood Warning | HGX | Chambers, Harris | 91 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 17, 11:31 PM CDT | Mesoscale Discussion | SPC | Calcasieu, Cameron, Iberia, Jefferson Davis, Vermilion | 59 min |
| Apr 18, 1:31 AM CDT | Mesoscale Discussion | SPC | Acadia, Assumption, Calcasieu, Cameron, Iberia, Iberville and 5 more | 59 min |
| Apr 18, 6:17 PM CDT | Mesoscale Discussion | SPC | Avoyelles, Catahoula, Concordia, Grant, LaSalle, Rapides and 2 more | 2 hr |
| 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, 10:59 PM CDT | Mesoscale Discussion | SPC | Aransas, Brooks, Hidalgo, Kenedy, Kleberg, Nueces | 91 min |
| Apr 18, 1:52 PM CDT | Mesoscale Discussion | SPC | Archer, Baylor, Brown, Callahan, Clay, Coleman and 23 more | 113 min |
| Apr 18, 2:13 PM CDT | Severe Thunderstorm Watch | SPC | Bandera, Bastrop, Bexar, Blanco, Bosque, Brown and 58 more | 8 hr |
| 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, 2015Severe Thunderstorm Watches in Louisiana, 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; radar from the NEXRAD Level II archive.