Alert archive / Louisiana / Tornado Watches in 2020
Tornado Watch 122
The Storm Prediction Center issued this tornado watch at Apr 19, 2020, 2:39 PM CDT for 45 parishes in Louisiana; 8 counties in Mississippi; 22 counties in Texas. It was in force for 9 hr.
The area
The outline as issued.
The facts
- Issued
- Apr 19, 2020, 2:39 PM CDT (19:39 UTC)
- Expired
- Apr 19, 2020, 11:31 PM CDT
- In force
- 9 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2.5 in
- Strongest gust expected
- 60 kt
All 75 counties
Acadia Parish, LA, Allen Parish, LA, Ascension Parish, LA, Assumption Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Calcasieu Parish, LA, Caldwell Parish, LA, Cameron Parish, LA, De Soto Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Grant Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jackson Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Lafourche Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Livingston Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Saint Tammany Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, Terrebonne Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Winn Parish, LA, Amite County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS, Angelina County, TX, Brazoria County, TX, Chambers County, TX, Fort Bend County, TX, Galveston County, TX, Hardin County, TX, Harris County, TX, Jasper County, TX, Jefferson County, TX, Liberty 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
The radar
The Ft Polk radar (KPOE), 83 km from the middle of the area, began a volume at 19:39 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
- 70%
- One or more EF2 to EF5 tornadoes
- 50%
- Ten or more severe wind reports
- 70%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 70%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
27 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 19, 2:43 PM CDT | Severe Thunderstorm Warning | SHV | Sabine | 50 min |
| Apr 19, 2:49 PM CDT | Severe Thunderstorm Warning | SHV | Angelina, Nacogdoches | 41 min |
| Apr 19, 2:54 PM CDT | Severe Thunderstorm Warning | HGX | Brazoria, Galveston | 21 min |
| Apr 19, 3:22 PM CDT | Severe Thunderstorm Warning | SHV | Angelina, Nacogdoches, San Augustine | 53 min |
| Apr 19, 3:59 PM CDT | Severe Thunderstorm Warning | HGX | Galveston | 14 min |
| Apr 19, 4:00 PM CDT | Severe Thunderstorm Warning | SHV | Sabine | 45 min |
| Apr 19, 4:16 PM CDT | Tornado Warning | HGX | Liberty | 22 min |
| Apr 19, 4:34 PM CDT | Severe Thunderstorm Warning | SHV | Grant, Natchitoches, Sabine | 56 min |
| Apr 19, 4:49 PM CDT | Severe Thunderstorm Warning | LCH | Rapides, Vernon | 56 min |
| Apr 19, 4:54 PM CDT | Severe Thunderstorm Warning | LIX | Pointe Coupee, West Feliciana | 50 min |
| Apr 19, 4:55 PM CDT | Tornado Warning | LCH | Vernon | 20 min |
| Apr 19, 5:02 PM CDT | Severe Thunderstorm Warning | LCH | Beauregard, Calcasieu | 43 min |
| Apr 19, 5:08 PM CDT | Severe Thunderstorm Warning | SHV | Caldwell, Grant, LaSalle, Winn | 52 min |
| Apr 19, 5:11 PM CDT | Tornado Warning | LCH | Rapides, Vernon | 16 min |
| Apr 19, 5:11 PM CDT | Severe Thunderstorm Warning | LIX | Wilkinson | 49 min |
| Apr 19, 5:35 PM CDT | Severe Thunderstorm Warning | LIX | East Feliciana, Saint Helena | 70 min |
| Apr 19, 5:41 PM CDT | Severe Thunderstorm Warning | LIX | Amite | 49 min |
| Apr 19, 6:01 PM CDT | Tornado Warning | LIX | East Feliciana, Saint Helena, Tangipahoa | 59 min |
| Apr 19, 6:39 PM CDT | Tornado Warning | LIX | Washington | 38 min |
| Apr 19, 7:24 PM CDT | Severe Thunderstorm Warning | LIX | Wilkinson | 11 min |
| Apr 19, 9:09 PM CDT | Severe Thunderstorm Warning | LIX | Livingston, Saint Helena, Saint Tammany, Tangipahoa, Washington | 36 min |
| Apr 19, 9:41 PM CDT | Severe Thunderstorm Warning | LIX | Livingston, Saint Tammany, Tangipahoa | 34 min |
| Apr 19, 9:50 PM CDT | Tornado Warning | LIX | Hancock, Pearl River | 25 min |
| Apr 19, 10:12 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany | 33 min |
| Apr 19, 10:38 PM CDT | Severe Thunderstorm Warning | LIX | Jackson | 54 min |
| Apr 19, 10:41 PM CDT | Severe Thunderstorm Warning | LIX | Hancock, Harrison | 34 min |
| Apr 19, 10:56 PM CDT | Severe Thunderstorm Warning | LIX | Saint Tammany | 34 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, 7.7 hours before the alert went out and 92 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
- 1153 J/kg
- Mixed-layer CIN
- -291 J/kg
- Mixed-layer LCL
- 1054 m above ground
- 0-6 km bulk shear
- 54 kt
- 0-1 km storm-relative helicity
- 215 m²/s²
- 0-3 km storm-relative helicity
- 276 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 4.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 18, 8:27 PM CDT | Mesoscale Discussion | SPC | Bienville, Bossier, Caddo, Claiborne, De Soto, Red River and 1 more | 2 hr |
| Apr 18, 8:56 PM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Ascension, Assumption, Cameron, East Baton Rouge and 26 more | 2 hr |
| Apr 19, 8:41 AM CDT | Tornado Watch | SPC | Allen, Beauregard, Bienville, Bossier, Caddo, Calcasieu and 18 more | 6 hr |
| Apr 19, 10:45 AM CDT | Mesoscale Discussion | SPC | Caldwell, De Soto, Grant, Jackson, LaSalle, Natchitoches and 5 more | 2 hr |
| Apr 19, 11:06 AM CDT | Mesoscale Discussion | SPC | Avoyelles, Catahoula, Concordia, Franklin, Madison, Richland and 1 more | 54 min |
| Apr 19, 11:45 AM CDT | Tornado Watch | SPC | Catahoula, Concordia, East Carroll, Franklin, Madison, Morehouse and 3 more | 9 hr |
| Apr 19, 12:39 PM CDT | Mesoscale Discussion | SPC | Beauregard, Calcasieu, Vernon | 66 min |
| Apr 19, 12:47 PM CDT | Mesoscale Discussion | SPC | Avoyelles, Bienville, Caldwell, Catahoula, Concordia, De Soto and 14 more | 58 min |
| Apr 19, 2:03 PM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Assumption, Avoyelles, Beauregard, Calcasieu and 23 more | 57 min |
| Apr 19, 3:07 PM CDT | Mesoscale Discussion | SPC | Madison, Tensas | 113 min |
| Apr 19, 5:40 PM CDT | Mesoscale Discussion | SPC | Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Catahoula and 18 more | 2 hr |
| Apr 19, 6:37 PM CDT | Mesoscale Discussion | SPC | Washington | 53 min |
| Apr 19, 2:34 AM CDT | Mesoscale Discussion | SPC | Attala, Bolivar, Calhoun, Carroll, Chickasaw, Choctaw and 29 more | 116 min |
| Apr 19, 3:56 PM CDT | Tornado Watch | SPC | George, Greene, Perry, Stone, Wayne | 6 hr |
| Apr 19, 7:22 AM CDT | Mesoscale Discussion | SPC | Anderson, Angelina, Austin, Bastrop, Bell, Brazoria and 52 more | 113 min |
| Apr 19, 11:19 AM CDT | Mesoscale Discussion | SPC | Bowie, Camp, Cass, Collin, Dallas, Delta and 16 more | 116 min |
Nearby
Tornado Watches in Louisiana, 2020Tornado Watches in Texas, 2020Tornado Watches in Mississippi, 2020Every tornado watch in 2020
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.