Alert archive / Texas / Tornado Watches in 2019
Tornado Watch 39
The Storm Prediction Center issued this tornado watch at Apr 6, 2019, 5:54 PM CDT for 13 parishes in Louisiana; 18 counties in Texas. It was in force for 4 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 6, 2019, 5:54 PM CDT (22:54 UTC)
- Expired
- Apr 6, 2019, 10:00 PM CDT
- In force
- 4 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 31 counties
Bienville Parish, LA, Caldwell Parish, LA, De Soto Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Sabine Parish, LA, Union Parish, LA, Winn Parish, LA, Angelina County, TX, Brazos County, TX, Burleson County, TX, Cherokee County, TX, Grimes County, TX, Houston County, TX, Madison County, TX, Nacogdoches County, TX, Panola County, TX, Polk County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Trinity County, TX, Walker County, TX, Washington County, TX
The radar
The Shreveport radar (KSHV), 159 km from the middle of the area, began a volume at 22:57 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
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- 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
- 60%
Warnings issued inside it
18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 5:55 PM CDT | Tornado Warning | HGX | Houston | 20 min |
| Apr 6, 6:02 PM CDT | Tornado Warning | HGX | Madison | 28 min |
| Apr 6, 6:10 PM CDT | Severe Thunderstorm Warning | SHV | Cherokee, Nacogdoches, Rusk | 65 min |
| Apr 6, 6:17 PM CDT | Severe Thunderstorm Warning | HGX | Houston | 13 min |
| Apr 6, 6:23 PM CDT | Tornado Warning | SHV | Cherokee, Nacogdoches, Rusk | 52 min |
| Apr 6, 6:28 PM CDT | Tornado Warning | HGX | Houston, Madison | 32 min |
| Apr 6, 6:35 PM CDT | Severe Thunderstorm Warning | HGX | Brazos, Grimes, Madison | 25 min |
| Apr 6, 6:59 PM CDT | Severe Thunderstorm Warning | HGX | Houston, Madison | 46 min |
| Apr 6, 7:13 PM CDT | Severe Thunderstorm Warning | SHV | Nacogdoches, Panola, Rusk, Shelby | 23 min |
| Apr 6, 7:42 PM CDT | Flash Flood Warning | SHV | Jackson, Lincoln, Union | 3 hr |
| Apr 6, 7:44 PM CDT | Severe Thunderstorm Warning | HGX | Houston, Trinity | 46 min |
| Apr 6, 8:06 PM CDT | Severe Thunderstorm Warning | SHV | Grant, Natchitoches, Winn | 39 min |
| Apr 6, 8:15 PM CDT | Severe Thunderstorm Warning | SHV | Cherokee, Nacogdoches | 21 min |
| Apr 6, 8:53 PM CDT | Severe Thunderstorm Warning | SHV | Grant, Jackson, Natchitoches, Winn | 37 min |
| Apr 6, 9:14 PM CDT | Severe Thunderstorm Warning | SHV | San Augustine, Shelby | 46 min |
| Apr 6, 9:28 PM CDT | Severe Thunderstorm Warning | SHV | Jackson, Winn | 47 min |
| Apr 6, 9:32 PM CDT | Severe Thunderstorm Warning | SHV | Jackson, Lincoln, Ouachita, Union | 43 min |
| Apr 6, 9:34 PM CDT | Severe Thunderstorm Warning | SHV | Caldwell, Grant, LaSalle, Winn | 41 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
Shreveport, LA (KBAD), launched 12:00Z, 10.9 hours before the alert went out and 167 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
- 242 J/kg
- Mixed-layer CIN
- -295 J/kg
- Mixed-layer LCL
- 570 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 179 m²/s²
- 0-3 km storm-relative helicity
- 240 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.3
The text
As transmitted.
185 WWUS20 KWNS 062252 SEL9 SPC WW 062252 LAZ000-TXZ000-070300- URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 39 NWS Storm Prediction Center Norman OK 555 PM CDT Sat Apr 6 2019 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Northern Louisiana Eastern Texas * Effective this Saturday afternoon and evening from 555 PM until 1000 PM CDT. * Primary threats include... A couple tornadoes possible Isolated very large hail events to 2 inches in diameter possible Isolated damaging wind gusts to 70 mph possible SUMMARY...Clusters of strong to severe storms should persist for a few more hours this evening with all hazards possible. The tornado watch area is approximately along and 40 statute miles either side of a line from 25 miles west of College Station TX to 70 miles northeast of Natchitoches LA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU9). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. && OTHER WATCH INFORMATION...CONTINUE...WW 38... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 22025. ...Grams
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 4:48 PM CDT | Mesoscale Discussion | SPC | Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 12 more | 117 min |
| Apr 5, 7:10 PM CDT | Mesoscale Discussion | SPC | Andrews, Armstrong, Borden, Briscoe, Castro, Cochran and 42 more | 2 hr |
| Apr 6, 1:41 AM CDT | Mesoscale Discussion | SPC | Andrews, Borden, Childress, Coke, Cottle, Crane and 25 more | 94 min |
| Apr 6, 7:58 AM CDT | Mesoscale Discussion | SPC | Archer, Brown, Clay, Coleman, Comanche, Cooke and 11 more | 92 min |
| Apr 6, 9:08 AM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Austin, Bandera, Bastrop, Bell and 46 more | 3 hr |
| Apr 6, 10:35 AM CDT | Tornado Watch | SPC | Anderson, Angelina, Bastrop, Bell, Blanco, Brazos and 47 more | 7 hr |
| Apr 6, 1:09 PM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Bastrop, Bell, Blanco, Bosque and 44 more | 96 min |
| Apr 6, 3:03 PM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Bastrop, Bell, Blanco, Bosque and 44 more | 87 min |
Nearby
Tornado Watches in Texas, 2019Tornado Watches in Louisiana, 2019Every tornado 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.