Alert archive / Texas / Tornado Watches in 2020

Tornado Watch 120

April 19, 202024 parishes in Louisiana; 44 counties in Texas

The Storm Prediction Center issued this tornado watch at Apr 19, 2020, 8:41 AM CDT for 24 parishes in Louisiana; 44 counties in Texas. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Apr 19, 2020, 8:41 AM CDT (13:41 UTC)
Expired: Apr 19, 2020, 3:00 PM CDT
In force: 6 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2.5 in
Strongest gust expected: 60 kt

All 68 counties

Allen Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Calcasieu Parish, LA, Caldwell Parish, LA, Cameron Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, Grant Parish, LA, Jackson Parish, LA, Jefferson Davis Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Union Parish, LA, Vernon Parish, LA, Webster Parish, LA, Winn Parish, LA, Anderson County, TX, Angelina County, TX, Austin County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Chambers County, TX, Cherokee County, TX, Colorado County, TX, Fort Bend County, TX, Freestone County, TX, Galveston County, TX, Gregg County, TX, Grimes County, TX, Hardin County, TX, Harris County, TX, Harrison County, TX, Henderson County, TX, Houston County, TX, Jackson County, TX, Jasper County, TX, Jefferson County, TX, Leon County, TX, Liberty County, TX, Madison County, TX, Matagorda County, TX, Montgomery County, TX, Nacogdoches County, TX, Newton County, TX, Orange 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, Smith County, TX, Trinity County, TX, Tyler County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX

The radar

The Ft Polk radar (KPOE), 86 km from the middle of the area, began a volume at 13:46 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: 20%
Ten or more severe hail reports: 90%
One or more hailstones of 2 inches or more: 60%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

38 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Apr 19, 9:02 AM CDT	Severe Thunderstorm Warning	HGX	Fort Bend, Harris	43 min
Apr 19, 9:08 AM CDT	Severe Thunderstorm Warning	HGX	Fort Bend, Harris, Waller	37 min
Apr 19, 9:16 AM CDT	Severe Thunderstorm Warning	FWD	Anderson, Freestone, Limestone	59 min
Apr 19, 9:27 AM CDT	Severe Thunderstorm Warning	LCH	Jasper, Newton, Tyler	33 min
Apr 19, 9:44 AM CDT	Severe Thunderstorm Warning	HGX	Harris, Liberty, Montgomery, Waller	46 min
Apr 19, 9:58 AM CDT	Severe Thunderstorm Warning	LCH	Jasper, Newton, Tyler	17 min
Apr 19, 10:05 AM CDT	Severe Thunderstorm Warning	FWD	Anderson	40 min
Apr 19, 10:13 AM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Nacogdoches, Rusk	62 min
Apr 19, 10:33 AM CDT	Severe Thunderstorm Warning	SHV	De Soto, Sabine	42 min
Apr 19, 10:47 AM CDT	Severe Thunderstorm Warning	SHV	Bossier, Caddo, De Soto	43 min
Apr 19, 10:49 AM CDT	Severe Thunderstorm Warning	HGX	Harris, Liberty, Montgomery, San Jacinto	41 min
Apr 19, 11:06 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Bossier, Caddo, De Soto, Red River, Webster	39 min
Apr 19, 11:12 AM CDT	Severe Thunderstorm Warning	SHV	Nacogdoches, Panola, Rusk, Shelby	48 min
Apr 19, 11:19 AM CDT	Severe Thunderstorm Warning	FWD	Anderson	56 min
Apr 19, 11:40 AM CDT	Severe Thunderstorm Warning	SHV	Bienville, Jackson, Natchitoches, Red River, Winn	65 min
Apr 19, 11:48 AM CDT	Severe Thunderstorm Warning	SHV	Sabine	57 min
Apr 19, 12:05 PM CDT	Severe Thunderstorm Warning	HGX	Jackson, Matagorda, Wharton	40 min
Apr 19, 12:08 PM CDT	Severe Thunderstorm Warning	SHV	De Soto, Natchitoches, Red River, Sabine	67 min
Apr 19, 12:28 PM CDT	Tornado Warning	HGX	Polk, San Jacinto	20 min
Apr 19, 12:34 PM CDT	Severe Thunderstorm Warning	SHV	Natchitoches, Sabine	41 min
Apr 19, 12:35 PM CDT	Severe Thunderstorm Warning	SHV	Smith, Wood	36 min
Apr 19, 12:44 PM CDT	Severe Thunderstorm Warning	HGX	Jackson, Matagorda, Wharton	46 min
Apr 19, 1:01 PM CDT	Flash Flood Warning	SHV	Ouachita	5 hr
Apr 19, 1:06 PM CDT	Severe Thunderstorm Warning	SHV	Grant, Natchitoches, Sabine, Winn	54 min
Apr 19, 1:13 PM CDT	Severe Thunderstorm Warning	LCH	Tyler	22 min
Apr 19, 1:19 PM CDT	Tornado Warning	SHV	Grant, Natchitoches, Winn	41 min
Apr 19, 1:26 PM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Fort Bend, Matagorda, Wharton	49 min
Apr 19, 1:39 PM CDT	Severe Thunderstorm Warning	SHV	Caldwell, LaSalle, Winn	52 min
Apr 19, 1:46 PM CDT	Severe Thunderstorm Warning	LCH	Jasper, Newton	29 min
Apr 19, 1:51 PM CDT	Severe Thunderstorm Warning	SHV	Grant, LaSalle, Winn	54 min
Apr 19, 1:53 PM CDT	Tornado Warning	HGX	Brazoria, Matagorda	37 min
Apr 19, 1:56 PM CDT	Tornado Warning	SHV	Grant, LaSalle, Winn	39 min
Apr 19, 2:12 PM CDT	Severe Thunderstorm Warning	SHV	Caddo, De Soto, Red River, Sabine	48 min
Apr 19, 2:15 PM CDT	Severe Thunderstorm Warning	HGX	Brazoria, Fort Bend	45 min
Apr 19, 2:27 PM CDT	Tornado Warning	HGX	Brazoria	27 min
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

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, 1.7 hours before the alert went out and 122 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

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, 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, 2:39 PM CDT	Tornado Watch	SPC	Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 39 more	9 hr
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, 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 Texas, 2020 Tornado Watches in Louisiana, 2020 Every 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.