Alert archive / Louisiana / Tornado Watches in 2019
Tornado Watch 189
The Storm Prediction Center issued this tornado watch at May 18, 2019, 7:08 PM CDT for 17 parishes in Louisiana; 12 counties in Texas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- May 18, 2019, 7:08 PM CDT (00:08 UTC)
- Expired
- May 19, 2019, 2:00 AM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 29 counties
Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Claiborne 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, Webster Parish, LA, Winn Parish, LA, Angelina County, TX, Cherokee County, TX, Gregg County, TX, Harrison County, TX, Marion County, TX, Nacogdoches County, TX, Panola County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Smith County, TX
The radar
The Shreveport radar (KSHV), 76 km from the middle of the area, began a volume at 00:09 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
- 50%
- One or more EF2 to EF5 tornadoes
- 30%
- Ten or more severe wind reports
- 70%
- 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
- 30%
- Six or more combined severe hail and wind reports
- 90%
Warnings issued inside it
24 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 7:08 PM CDT | Severe Thunderstorm Warning | SHV | Cherokee, Smith | 67 min |
| May 18, 7:19 PM CDT | Tornado Warning | SHV | Harrison, Marion | 41 min |
| May 18, 7:24 PM CDT | Tornado Warning | SHV | Cherokee | 51 min |
| May 18, 7:41 PM CDT | Severe Thunderstorm Warning | SHV | Bossier, Caddo | 64 min |
| May 18, 8:03 PM CDT | Severe Thunderstorm Warning | SHV | Cherokee, Nacogdoches, Rusk | 57 min |
| May 18, 8:05 PM CDT | Tornado Warning | SHV | Cherokee, Rusk | 40 min |
| May 18, 8:17 PM CDT | Flash Flood Warning | SHV | Cherokee, Rusk | 4 hr |
| May 18, 8:29 PM CDT | Severe Thunderstorm Warning | SHV | Bossier, Claiborne, Union, Webster | 46 min |
| May 18, 8:43 PM CDT | Severe Thunderstorm Warning | SHV | Nacogdoches, Panola, Rusk, Shelby | 62 min |
| May 18, 9:11 PM CDT | Severe Thunderstorm Warning | SHV | Cherokee | 49 min |
| May 18, 9:32 PM CDT | Flash Flood Warning | SHV | Angelina, Cherokee, Nacogdoches, Panola, Shelby | 3 hr |
| May 18, 9:39 PM CDT | Severe Thunderstorm Warning | SHV | De Soto | 66 min |
| May 18, 9:56 PM CDT | Severe Thunderstorm Warning | SHV | Cherokee, Nacogdoches, Rusk | 64 min |
| May 18, 10:28 PM CDT | Severe Thunderstorm Warning | SHV | De Soto | 62 min |
| May 18, 11:09 PM CDT | Severe Thunderstorm Warning | SHV | Bienville, Bossier, De Soto, Natchitoches, Red River, Sabine and 1 more | 66 min |
| May 18, 11:37 PM CDT | Severe Thunderstorm Warning | SHV | Caddo, De Soto, Sabine | 38 min |
| May 19, 12:15 AM CDT | Severe Thunderstorm Warning | SHV | Bienville, Bossier, Caddo, De Soto, Natchitoches, Red River and 2 more | 60 min |
| May 19, 12:21 AM CDT | Flash Flood Warning | SHV | De Soto, Red River, Sabine | 3 hr |
| May 19, 12:30 AM CDT | Flash Flood Warning | SHV | Angelina, Cherokee, Nacogdoches, Sabine, San Augustine, Shelby | 3 hr |
| May 19, 12:34 AM CDT | Severe Thunderstorm Warning | SHV | Bienville, Claiborne, Jackson, Lincoln, Natchitoches, Red River and 2 more | 56 min |
| May 19, 12:43 AM CDT | Severe Thunderstorm Warning | SHV | Natchitoches, Sabine | 62 min |
| May 19, 1:14 AM CDT | Severe Thunderstorm Warning | SHV | Bienville, Grant, Jackson, Natchitoches, Sabine, Winn | 61 min |
| May 19, 1:26 AM CDT | Flash Flood Warning | SHV | Bienville, Natchitoches, Red River, Winn | 3 hr |
| May 19, 1:34 AM CDT | Flash Flood Warning | SHV | Sabine | 3 hr |
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 00:00Z, 0.1 hours before the alert went out and 71 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
- 1844 J/kg
- Mixed-layer CIN
- -15 J/kg
- Mixed-layer LCL
- 1157 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 197 m²/s²
- Significant tornado parameter
- 1.5
- Supercell composite
- 10.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 11:53 PM CDT | Mesoscale Discussion | SPC | Bienville, Caldwell, De Soto, Grant, Jackson, Lincoln and 7 more | 97 min |
| May 19, 1:02 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 16 more | 58 min |
| May 19, 1:47 AM CDT | Tornado Watch | SPC | Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 49 more | 9 hr |
| May 19, 7:50 AM CDT | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 17 more | 85 min |
| May 19, 3:49 PM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 12 more | 86 min |
| May 18, 7:13 PM CDT | Mesoscale Discussion | SPC | Anderson, Bastrop, Bell, Brazos, Burleson, Cherokee and 19 more | 62 min |
| May 18, 10:16 PM CDT | Tornado Watch | SPC | Hardin, Houston, Jasper, Madison, Newton, Polk and 4 more | 6 hr |
| May 19, 4:43 AM CDT | Mesoscale Discussion | SPC | Kinney, Maverick, Uvalde, Zavala | 3 hr |
Nearby
Tornado Watches in Louisiana, 2019Tornado Watches in Texas, 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.