Alert archive / Louisiana / Tornado Watches in 2019
Tornado Watch 100
The Storm Prediction Center issued this tornado watch at Apr 24, 2019, 11:52 PM CDT for 25 parishes in Louisiana; 5 counties in Texas. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 24, 2019, 11:52 PM CDT (04:52 UTC)
- Expired
- Apr 25, 2019, 8:00 AM CDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1 in
- Strongest gust expected
- 55 kt
All 30 counties
Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Calcasieu Parish, LA, Caldwell Parish, LA, De Soto Parish, LA, Evangeline Parish, LA, Grant Parish, LA, Jackson Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Union Parish, LA, Vernon Parish, LA, Winn Parish, LA, Jasper County, TX, Newton County, TX, Sabine County, TX, San Augustine County, TX, Tyler County, TX
The radar
The Ft Polk radar (KPOE), 54 km from the middle of the area, began a volume at 04:53 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
- 40%
- 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
- 10%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 50%
Warnings issued inside it
21 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 11:55 PM CDT | Tornado Warning | SHV | De Soto, Natchitoches, Sabine | 50 min |
| Apr 25, 12:17 AM CDT | Flash Flood Warning | SHV | Sabine, San Augustine, Shelby | 3 hr |
| Apr 25, 12:32 AM CDT | Severe Thunderstorm Warning | SHV | Bienville, De Soto, Natchitoches, Red River | 43 min |
| Apr 25, 12:36 AM CDT | Tornado Warning | SHV | Bienville, Natchitoches, Red River | 39 min |
| Apr 25, 12:37 AM CDT | Severe Thunderstorm Warning | SHV | De Soto, Natchitoches, Red River, Sabine | 38 min |
| Apr 25, 1:01 AM CDT | Tornado Warning | SHV | Bienville, Jackson, Lincoln | 44 min |
| Apr 25, 1:12 AM CDT | Severe Thunderstorm Warning | SHV | Bienville, Jackson, Natchitoches, Red River, Sabine, Winn | 63 min |
| Apr 25, 1:37 AM CDT | Tornado Warning | SHV | Bienville, Jackson, Lincoln, Ouachita, Union | 38 min |
| Apr 25, 1:55 AM CDT | Severe Thunderstorm Warning | SHV | Caldwell, Jackson, Lincoln, Natchitoches, Ouachita, Union and 1 more | 50 min |
| Apr 25, 2:14 AM CDT | Tornado Warning | SHV | Union | 31 min |
| Apr 25, 3:02 AM CDT | Severe Thunderstorm Warning | SHV | Caldwell, LaSalle | 43 min |
| Apr 25, 3:10 AM CDT | Tornado Warning | SHV | Caldwell, LaSalle | 37 min |
| Apr 25, 4:05 AM CDT | Severe Thunderstorm Warning | LCH | Beauregard | 40 min |
| Apr 25, 4:11 AM CDT | Severe Thunderstorm Warning | SHV | Grant, Natchitoches, Winn | 49 min |
| Apr 25, 4:37 AM CDT | Tornado Warning | LCH | Beauregard | 26 min |
| Apr 25, 4:59 AM CDT | Tornado Warning | LCH | Allen, Beauregard, Rapides, Vernon | 31 min |
| Apr 25, 5:19 AM CDT | Severe Thunderstorm Warning | LCH | Rapides | 13 min |
| Apr 25, 5:27 AM CDT | Severe Thunderstorm Warning | SHV | Grant | 36 min |
| Apr 25, 5:28 AM CDT | Severe Thunderstorm Warning | LCH | Allen, Avoyelles, Evangeline, Rapides | 47 min |
| Apr 25, 5:48 AM CDT | Severe Thunderstorm Warning | SHV | LaSalle | 42 min |
| Apr 25, 6:06 AM CDT | Severe Thunderstorm Warning | LCH | Avoyelles, Evangeline, Rapides | 39 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 00:00Z, 4.9 hours before the alert went out and 124 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
- 94 J/kg
- Mixed-layer CIN
- -68 J/kg
- Mixed-layer LCL
- 1094 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 123 m²/s²
- 0-3 km storm-relative helicity
- 240 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 7:35 PM CDT | Mesoscale Discussion | SPC | Vernon | 85 min |
| Apr 24, 11:19 PM CDT | Mesoscale Discussion | SPC | Beauregard, Natchitoches, Sabine, Vernon | 86 min |
| Apr 24, 11:57 PM CDT | Mesoscale Discussion | SPC | Bienville, Bossier, Claiborne, De Soto, Natchitoches, Red River and 2 more | 63 min |
| Apr 25, 2:08 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Bienville, Bossier and 24 more | 67 min |
| Apr 25, 2:43 AM CDT | Severe Thunderstorm Watch | SPC | Catahoula, Concordia, East Carroll, Franklin, Madison, Morehouse and 3 more | 6 hr |
| Apr 25, 5:02 AM CDT | Mesoscale Discussion | SPC | Catahoula, Concordia, East Carroll, Franklin, Madison, Richland and 2 more | 58 min |
| Apr 25, 5:24 AM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Beauregard, Calcasieu, Evangeline, Grant and 7 more | 66 min |
| Apr 25, 7:10 AM CDT | Mesoscale Discussion | SPC | Acadia, Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia and 22 more | 2 hr |
| Apr 25, 8:06 AM CDT | Tornado Watch | SPC | Acadia, Ascension, Assumption, Avoyelles, East Baton Rouge, East Feliciana and 26 more | 8 hr |
| Apr 25, 11:48 AM CDT | Mesoscale Discussion | SPC | Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 17 more | 117 min |
| Apr 25, 3:14 PM CDT | Mesoscale Discussion | SPC | Jefferson, Plaquemines, Saint Bernard | 2 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.