Alert archive / Louisiana / Tornado Watches in 2019

Tornado Watch 191

May 19, 201955 parishes in Louisiana; 19 counties in Mississippi

The Storm Prediction Center issued this tornado watch at May 19, 2019, 1:47 AM CDT for 55 parishes in Louisiana; 19 counties in Mississippi. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued: May 19, 2019, 1:47 AM CDT (06:47 UTC)
Expired: May 19, 2019, 11:00 AM CDT
In force: 9 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1 in
Strongest gust expected: 60 kt

All 74 counties

Acadia Parish, LA, Allen Parish, LA, Ascension Parish, LA, Assumption Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Caldwell Parish, LA, Cameron Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Carroll Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jackson Parish, LA, Jefferson Davis Parish, LA, Jefferson Parish, LA, Lafayette Parish, LA, Lafourche Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Livingston Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Orleans Parish, LA, Ouachita Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Richland Parish, LA, Sabine Parish, LA, Saint Charles 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, Tensas Parish, LA, Terrebonne Parish, LA, Union Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Carroll Parish, LA, West Feliciana Parish, LA, Winn Parish, LA, Adams County, MS, Amite County, MS, Claiborne County, MS, Copiah County, MS, Franklin County, MS, Hinds County, MS, Issaquena County, MS, Jefferson County, MS, Lawrence County, MS, Lincoln County, MS, Madison County, MS, Pike County, MS, Rankin County, MS, Sharkey County, MS, Simpson County, MS, Walthall County, MS, Warren County, MS, Wilkinson County, MS, Yazoo County, MS

The radar

The Ft Polk radar (KPOE), 62 km from the middle of the area, began a volume at 06:49 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: 10%
Ten or more severe wind reports: 20%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 5%
One or more hailstones of 2 inches or more: 5%
Six or more combined severe hail and wind reports: 40%

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
May 19, 2:02 AM CDT	Tornado Warning	SHV	Natchitoches	28 min
May 19, 2:09 AM CDT	Severe Thunderstorm Warning	SHV	Caldwell, Grant, LaSalle, Lincoln, Natchitoches, Ouachita and 2 more	66 min
May 19, 2:26 AM CDT	Severe Thunderstorm Warning	JAN	Franklin, Morehouse, Richland, West Carroll	49 min
May 19, 2:46 AM CDT	Severe Thunderstorm Warning	JAN	Catahoula, Concordia, Franklin, Tensas	59 min
May 19, 2:52 AM CDT	Flash Flood Warning	SHV	Grant, Natchitoches, Winn	2 hr
May 19, 3:02 AM CDT	Tornado Warning	JAN	East Carroll, Franklin, Madison, Richland, West Carroll	26 min
May 19, 3:06 AM CDT	Tornado Warning	LCH	Beauregard	24 min
May 19, 3:29 AM CDT	Tornado Warning Tornado observedConsiderable damage threat	LCH	Beauregard, Vernon	18 min
May 19, 3:45 AM CDT	Severe Thunderstorm Warning	LCH	Allen, Beauregard	45 min
May 19, 3:46 AM CDT	Severe Thunderstorm Warning	JAN	Concordia, Tensas	59 min
May 19, 3:51 AM CDT	Severe Thunderstorm Warning	JAN	East Carroll, Madison	39 min
May 19, 4:05 AM CDT	Tornado Warning	JAN	Tensas	40 min
May 19, 4:07 AM CDT	Tornado Warning	LCH	Allen, Beauregard, Vernon	25 min
May 19, 4:23 AM CDT	Severe Thunderstorm Warning	LCH	Allen, Beauregard, Jefferson Davis	67 min
May 19, 4:24 AM CDT	Flash Flood Warning	JAN	Catahoula, Concordia	3 hr
May 19, 4:31 AM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Hinds, Issaquena, Madison, Sharkey, Warren and 1 more	44 min
May 19, 4:41 AM CDT	Severe Thunderstorm Warning	JAN	Claiborne, Copiah, Jefferson, Lincoln	50 min
May 19, 4:47 AM CDT	Tornado Warning	LCH	Rapides	28 min
May 19, 4:49 AM CDT	Tornado Warning	LCH	Allen, Beauregard	13 min
May 19, 4:58 AM CDT	Severe Thunderstorm Warning	LCH	Allen, Evangeline	47 min
May 19, 5:12 AM CDT	Tornado Warning	LCH	Allen, Evangeline	18 min
May 19, 5:26 AM CDT	Tornado Warning	LCH	Evangeline	35 min
May 19, 5:36 AM CDT	Severe Thunderstorm Warning	LCH	Acadia, Evangeline, Saint Landry	54 min
May 19, 5:43 AM CDT	Tornado Warning	LCH	Evangeline	32 min
May 19, 5:56 AM CDT	Tornado Warning	LCH	Evangeline, Saint Landry	34 min
May 19, 5:58 AM CDT	Severe Thunderstorm Warning	LCH	Acadia, Jefferson Davis, Lafayette	47 min
May 19, 6:11 AM CDT	Tornado Warning	LCH	Saint Landry	34 min
May 19, 6:21 AM CDT	Severe Thunderstorm Warning	LCH	Acadia, Lafayette, Saint Landry, Saint Martin	54 min
May 19, 6:28 AM CDT	Severe Thunderstorm Warning	LIX	Iberville, Pointe Coupee, West Baton Rouge, West Feliciana	62 min
May 19, 6:32 AM CDT	Severe Thunderstorm Warning	LCH	Acadia, Iberia, Lafayette, Saint Martin, Vermilion	58 min
May 19, 6:54 AM CDT	Flash Flood Warning	LCH	Acadia, Allen, Beauregard, Calcasieu, Jefferson Davis	3 hr
May 19, 7:11 AM CDT	Severe Thunderstorm Warning	LIX	Ascension, East Baton Rouge, Iberville, Livingston, Pointe Coupee, West Baton Rouge	64 min
May 19, 7:20 AM CDT	Severe Thunderstorm Warning	LCH	Iberia, Lafayette, Saint Martin, St. Mary, Vermilion	55 min
May 19, 8:04 AM CDT	Severe Thunderstorm Warning	LIX	East Baton Rouge, Livingston, Saint Helena, Tangipahoa	41 min
May 19, 8:14 AM CDT	Severe Thunderstorm Warning	LCH	Iberia, Saint Martin, St. Mary	61 min
May 19, 8:38 AM CDT	Severe Thunderstorm Warning	LIX	Saint Helena, Tangipahoa	19 min
May 19, 8:56 AM CDT	Tornado Warning	LIX	Tangipahoa, Washington	19 min
May 19, 9:04 AM CDT	Severe Thunderstorm Warning	LIX	Ascension, Saint James, Saint John the Baptist	26 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 00:00Z, 6.8 hours before the alert went out and 164 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: 2638 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 729 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 94 m²/s²
0-3 km storm-relative helicity: 177 m²/s²
Significant tornado parameter: 1.8
Supercell composite: 9.9

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 18, 7:08 PM CDT	Tornado Watch	SPC	Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 11 more	7 hr
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, 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, 9:00 PM CDT	Mesoscale Discussion	SPC	DeSoto, Marshall, Panola, Quitman, Tate, Tunica	60 min

Nearby

Tornado Watches in Louisiana, 2019 Tornado Watches in Mississippi, 2019 Every 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.