Alert archive / Texas / Severe Thunderstorm Watches in 2017
Severe Thunderstorm Watch 192
The Storm Prediction Center issued this severe thunderstorm watch at May 3, 2017, 5:00 PM CDT for 16 parishes in Louisiana; 35 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 3, 2017, 5:00 PM CDT (22:00 UTC)
- Expired
- May 4, 2017, 12:11 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 51 counties
Acadia Parish, LA, Allen Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, De Soto Parish, LA, Evangeline Parish, LA, Jefferson Davis Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Webster Parish, LA, Angelina County, TX, Austin County, TX, Bastrop County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Chambers County, TX, Colorado County, TX, Fayette County, TX, Fort Bend County, TX, Galveston County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Houston County, TX, Jasper County, TX, Jefferson County, TX, Lavaca County, TX, Lee County, TX, Liberty County, TX, Madison County, TX, Montgomery County, TX, Nacogdoches County, TX, Newton County, TX, Orange County, TX, Polk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX
The radar
The Houston radar (KHGX), 95 km from the middle of the area, began a volume at 22:00 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
- 50%
- One or more gusts of 65 knots or more
- 10%
- 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
- 80%
Warnings issued inside it
32 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 5:04 PM CDT | Severe Thunderstorm Warning | SHV | Angelina, Cherokee, Nacogdoches, San Augustine, Shelby | 56 min |
| May 3, 5:13 PM CDT | Severe Thunderstorm Warning | HGX | Houston, Madison, Walker | 32 min |
| May 3, 5:15 PM CDT | Flash Flood Warning | LCH | Allen, Beauregard, Calcasieu, Jefferson Davis | 6 hr |
| May 3, 5:16 PM CDT | Severe Thunderstorm Warning | SHV | Sabine | 59 min |
| May 3, 5:22 PM CDT | Flash Flood Warning | LCH | Acadia, Evangeline, Iberia, Lafayette, Saint Landry, Saint Martin and 2 more | 6 hr |
| May 3, 5:28 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, De Soto, Natchitoches, Red River, Webster, Winn | 47 min |
| May 3, 5:29 PM CDT | Flash Flood Warning | LCH | Jasper, Newton | 6 hr |
| May 3, 5:42 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Burleson, Grimes, Madison | 48 min |
| May 3, 5:43 PM CDT | Severe Thunderstorm Warning | HGX | Grimes, Houston, Madison, Trinity, Walker | 47 min |
| May 3, 5:47 PM CDT | Severe Thunderstorm Warning | HGX | Polk, Trinity | 43 min |
| May 3, 5:49 PM CDT | Severe Thunderstorm Warning | SHV | Angelina, Nacogdoches, Sabine, San Augustine | 56 min |
| May 3, 5:58 PM CDT | Severe Thunderstorm Warning | SHV | Angelina, Nacogdoches, San Augustine, Shelby | 25 min |
| May 3, 6:08 PM CDT | Severe Thunderstorm Warning | LCH | Acadia, Lafayette, Saint Landry, Saint Martin | 67 min |
| May 3, 6:12 PM CDT | Severe Thunderstorm Warning | SHV | Sabine | 45 min |
| May 3, 6:15 PM CDT | Severe Thunderstorm Warning | HGX | Grimes, San Jacinto, Walker | 30 min |
| May 3, 6:21 PM CDT | Severe Thunderstorm Warning | LCH | Vernon | 54 min |
| May 3, 6:24 PM CDT | Flash Flood Warning | LCH | Avoyelles, Evangeline, Rapides, Saint Landry | 3 hr |
| May 3, 6:24 PM CDT | Flash Flood Warning | SHV | Sabine | 3 hr |
| May 3, 6:25 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Burleson, Washington | 50 min |
| May 3, 6:26 PM CDT | Flash Flood Warning | LCH | Jasper, Tyler | 4 hr |
| May 3, 6:42 PM CDT | Severe Thunderstorm Warning | HGX | Polk | 48 min |
| May 3, 6:53 PM CDT | Severe Thunderstorm Warning | EWX | Fayette, Lee | 37 min |
| May 3, 7:05 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Burleson, Washington | 40 min |
| May 3, 7:06 PM CDT | Severe Thunderstorm Warning | LCH | Avoyelles, Rapides, Vernon | 32 min |
| May 3, 7:26 PM CDT | Severe Thunderstorm Warning | LCH | Allen, Beauregard | 37 min |
| May 3, 7:27 PM CDT | Severe Thunderstorm Warning | LCH | Hardin, Jasper, Tyler | 48 min |
| May 3, 7:28 PM CDT | Severe Thunderstorm Warning | EWX | Fayette | 32 min |
| May 3, 7:32 PM CDT | Severe Thunderstorm Warning | LCH | Allen, Evangeline, Rapides | 30 min |
| May 3, 8:13 PM CDT | Severe Thunderstorm Warning | LCH | Beauregard | 32 min |
| May 3, 8:30 PM CDT | Severe Thunderstorm Warning | HGX | Chambers, Liberty | 45 min |
| May 3, 9:16 PM CDT | Severe Thunderstorm Warning | HGX | Chambers, Galveston, Liberty | 29 min |
| May 3, 9:39 PM CDT | Severe Thunderstorm Warning | LCH | Jefferson | 66 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
Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.0 hours before the alert went out and 212 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
- 2161 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 549 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 197 m²/s²
- Significant tornado parameter
- 2.2
- Supercell composite
- 12.3
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 7:04 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 13 more | 86 min |
| May 3, 7:32 AM CDT | Tornado Watch | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 24 more | 9 hr |
| May 3, 10:07 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 21 more | 83 min |
| May 3, 12:34 PM CDT | Severe Thunderstorm Watch | SPC | Bossier, Caddo | 5 hr |
| May 3, 1:58 PM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Assumption, Beauregard, Calcasieu, Cameron and 11 more | 62 min |
| May 3, 3:48 PM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Beauregard, Calcasieu, Cameron, Jefferson Davis | 87 min |
| May 3, 3:59 PM CDT | Mesoscale Discussion | SPC | Bossier, Caddo | 91 min |
| May 3, 6:54 PM CDT | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, Iberville, Livingston, Saint James and 3 more | 96 min |
| May 3, 1:30 AM CDT | Mesoscale Discussion | SPC | Collingsworth, Donley, Gray, Hemphill, Wheeler | 2 hr |
| May 3, 7:48 AM CDT | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Delta, Fannin, Franklin and 11 more | 117 min |
| May 3, 11:23 AM CDT | Mesoscale Discussion | SPC | Coryell, Dallas, Ellis, Falls, Freestone, Henderson and 9 more | 2 hr |
| May 3, 1:48 PM CDT | Mesoscale Discussion | SPC | Anderson, Bowie, Camp, Cass, Cherokee, Coryell and 31 more | 87 min |
Nearby
Severe Thunderstorm Watches in Texas, 2017Severe Thunderstorm Watches in Louisiana, 2017Every severe thunderstorm watch in 2017
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.