Alert archive / Louisiana / Mesoscale Discussions in 2022

Mesoscale Discussion 356

March 30, 2022Chicot County, Arkansas; 16 parishes in Louisiana; 7 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2022, 12:47 PM CDT for Chicot County, Arkansas; 16 parishes in Louisiana; 7 counties in Mississippi. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued
Mar 30, 2022, 12:47 PM CDT (17:47 UTC)
Expired
Mar 30, 2022, 1:45 PM CDT
In force
58 min
Issued by
the Storm Prediction Center
Concerning
Tornado watch 76...77
All 24 counties

Chicot County, AR, Allen Parish, LA, Avoyelles Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Jefferson Davis Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Rapides Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Bolivar County, MS, Humphreys County, MS, Issaquena County, MS, Sharkey County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS

The radar

The Ft Polk radar (KPOE), 157 km from the middle of the area, began a volume at 17:49 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.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 5.8 hours before the alert went out and 154 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, Jackson, MS at 12:00Z on 2022-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 18 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, Jackson, MS at 12:00Z on 2022-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 177 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
18 J/kg
Mixed-layer CIN
-557 J/kg
Mixed-layer LCL
781 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
177 m²/s²
0-3 km storm-relative helicity
452 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 29, 11:52 PM CDTTornado WatchSPCBenton, Carroll, Crawford, Franklin, Madison, Sebastian and 1 more8 hr
Mar 30, 4:57 AM CDTMesoscale DiscussionSPCBaxter, Boone, Carroll, Clark, Cleburne, Columbia and 36 more2 hr
Mar 30, 5:30 AM CDTTornado WatchSPCArkansas, Baxter, Boone, Bradley, Calhoun, Clark and 50 more8 hr
Mar 30, 9:44 AM CDTMesoscale DiscussionSPCClay, Fulton, Greene, Independence, Izard, Jackson and 3 more2 hr
Mar 30, 10:29 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 12 more61 min
Mar 30, 12:16 PM CDTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clay and 25 more9 hr
Mar 30, 2:16 PM CDTMesoscale DiscussionSPCArkansas, Chicot, Clay, Craighead, Crittenden, Cross and 8 more119 min
Mar 30, 11:26 AM CDTTornado WatchSPCAcadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 10 more8 hr
Mar 30, 1:48 PM CDTTornado WatchSPCAscension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 16 more9 hr
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

Mesoscale Discussions in Louisiana, 2022Mesoscale Discussions in Mississippi, 2022Mesoscale Discussions in Arkansas, 2022Every mesoscale discussion 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; radar from the NEXRAD Level II archive.