Alert archive / Louisiana / Tornado Watches in 2022

Tornado Watch 78

March 30, 202222 parishes in Louisiana; 4 counties in Mississippi

The Storm Prediction Center issued this tornado watch at Mar 30, 2022, 1:48 PM CDT for 22 parishes in Louisiana; 4 counties in Mississippi. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued
Mar 30, 2022, 1:48 PM CDT (18:48 UTC)
Expired
Mar 30, 2022, 11:00 PM CDT
In force
9 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
65 kt
All 26 counties

Ascension Parish, LA, Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberville Parish, LA, Jefferson Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Pointe Coupee Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Terrebonne Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS

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
60%
Ten or more severe wind reports
70%
One or more gusts of 65 knots or more
60%
Ten or more severe hail reports
20%
One or more hailstones of 2 inches or more
5%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Mar 30, 3:09 PM CDTSevere Thunderstorm WarningLIXPointe Coupee, West Feliciana66 min
Mar 30, 4:13 PM CDTSevere Thunderstorm WarningLIXEast Feliciana, Pointe Coupee, West Feliciana47 min
Mar 30, 5:12 PM CDTSevere Thunderstorm WarningLIXEast Feliciana, Saint Helena48 min
Mar 30, 5:18 PM CDTSevere Thunderstorm WarningLIXEast Baton Rouge, East Feliciana, Livingston, Saint Helena, West Baton Rouge42 min
Mar 30, 5:44 PM CDTSevere Thunderstorm WarningLIXAmite, Pike, Walthall61 min
Mar 30, 5:55 PM CDTFlash Flood WarningLIXEast Baton Rouge, West Baton Rouge80 min
Mar 30, 6:07 PM CDTSevere Thunderstorm WarningLIXSaint Helena, Tangipahoa, Washington38 min
Mar 30, 6:08 PM CDTFlash Flood WarningLIXAscension, East Baton Rouge, Iberville, Livingston77 min
Mar 30, 6:08 PM CDTSevere Thunderstorm Warning Considerable damage threatLIXLivingston, Tangipahoa52 min
Mar 30, 6:10 PM CDTTornado WarningLIXSaint Helena, Tangipahoa, Washington35 min
Mar 30, 6:42 PM CDTSevere Thunderstorm WarningLIXTangipahoa, Washington48 min
Mar 30, 6:53 PM CDTSevere Thunderstorm WarningLIXSaint John the Baptist, Saint Tammany, Tangipahoa, Washington37 min
Mar 30, 7:09 PM CDTTornado WarningLIXSaint John the Baptist, Tangipahoa21 min
Mar 30, 7:23 PM CDTFlash Flood WarningLIXSaint Tammany, Tangipahoa65 min
Mar 30, 7:42 PM CDTTornado WarningLIXSaint Tammany18 min
Mar 30, 7:51 PM CDTTornado Warning Tornado observedLIXSaint Tammany11 min
Mar 30, 8:06 PM CDTSevere Thunderstorm Warning Considerable damage threatLIXJefferson, Orleans, Plaquemines, Saint Bernard, Saint Charles, Saint Tammany39 min
Mar 30, 8:08 PM CDTTornado WarningLIXOrleans10 min
Mar 30, 8:18 PM CDTFlash Flood WarningLIXJefferson, Orleans, Saint Bernard, Saint Charles68 min
Mar 30, 8:18 PM CDTTornado WarningLIXSaint Tammany42 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 6.8 hours before the alert went out and 72 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-pSkew-T log-p diagram, Slidell Radar S, LA at 12:00Z on 2022-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 149 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Slidell Radar S, LA at 12:00Z on 2022-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 294 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
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
149 J/kg
Mixed-layer CIN
-215 J/kg
Mixed-layer LCL
570 m above ground
0-6 km bulk shear
53 kt
0-1 km storm-relative helicity
294 m²/s²
0-3 km storm-relative helicity
417 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 30, 4:57 AM CDTMesoscale DiscussionSPCBossier, Caddo, Webster2 hr
Mar 30, 5:30 AM CDTTornado WatchSPCBienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 11 more8 hr
Mar 30, 10:29 AM CDTMesoscale DiscussionSPCAllen, Beauregard, Bienville, Caldwell, Catahoula, Claiborne and 18 more61 min
Mar 30, 11:26 AM CDTTornado WatchSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 10 more8 hr
Mar 30, 12:16 PM CDTTornado WatchSPCCaldwell, Catahoula, Concordia, East Carroll, Franklin, Grant and 11 more9 hr
Mar 30, 12:47 PM CDTMesoscale DiscussionSPCAllen, Avoyelles, Caldwell, Catahoula, Concordia, East Carroll and 10 more58 min
Mar 30, 2:16 PM CDTMesoscale DiscussionSPCEast Carroll, Madison, Tensas, West Carroll119 min
Mar 30, 3:39 PM CDTMesoscale DiscussionSPCAscension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 10 more2 hr
Mar 30, 6:31 PM CDTMesoscale DiscussionSPCOrleans, Saint Charles, Saint James, Saint John the Baptist, Saint Tammany119 min
Mar 30, 3:39 PM CDTMesoscale DiscussionSPCClarke, Forrest, George, Greene, Harrison, Jackson and 8 more2 hr
Mar 30, 5:59 PM CDTMesoscale DiscussionSPCAlcorn, Attala, Chickasaw, Choctaw, Clay, Itawamba and 17 more91 min
Mar 30, 6:19 PM CDTMesoscale DiscussionSPCClarke, Covington, Forrest, Greene, Jasper, Jefferson Davis and 8 more86 min
Mar 30, 6:39 PM CDTTornado WatchSPCGeorge, Greene, Hancock, Harrison, Jackson, Pearl River and 3 more9 hr

Nearby

Tornado Watches in Louisiana, 2022Tornado Watches in Mississippi, 2022Every tornado watch in 2022

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.