Alert archive / Mississippi / Mesoscale Discussions in 2025

Mesoscale Discussion 657

May 2, 20254 states

The Storm Prediction Center issued this mesoscale discussion at May 2, 2025, 3:54 PM CDT for 4 states. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued: May 2, 2025, 3:54 PM CDT (20:54 UTC)
Expired: May 2, 2025, 5:30 PM CDT
In force: 96 min
Issued by: the Storm Prediction Center
Concerning: Severe thunderstorm watch 211

All 69 counties

Ashley County, AR, Chicot County, AR, Bienville Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Claiborne Parish, LA, Concordia Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Tensas Parish, LA, Union Parish, LA, Vernon Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Adams County, MS, Attala County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clay County, MS, Copiah County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Kemper County, MS, Leake County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yazoo County, MS, Jasper County, TX, Newton County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Tyler County, TX

The radar

The Ft Polk radar (KPOE), 160 km from the middle of the area, began a volume at 20:58 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

Shreveport, LA (KSHV), launched 12:00Z, 8.9 hours before the alert went out and 190 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: 541 J/kg
Mixed-layer CIN: -225 J/kg
Mixed-layer LCL: 1643 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 74 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.

Issued	Product	Office	Counties	Lasted
May 2, 9:39 AM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 14 more	2 hr
May 2, 9:58 AM CDT	Severe Thunderstorm Watch	SPC	Crittenden, Cross, Lee, Phillips, St. Francis	8 hr
May 2, 12:10 PM CDT	Severe Thunderstorm Watch	SPC	Ashley, Chicot	9 hr
May 2, 11:05 AM CDT	Mesoscale Discussion	SPC	Caddo, De Soto, Sabine	115 min
May 2, 1:47 PM CDT	Mesoscale Discussion	SPC	Avoyelles, Beauregard, Caldwell, Catahoula, Concordia, East Carroll and 16 more	118 min
May 2, 5:35 PM CDT	Mesoscale Discussion	SPC	Beauregard, Vernon	115 min
May 2, 8:28 AM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, DeSoto, Itawamba, Lafayette, Lee and 9 more	92 min
May 2, 11:29 AM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, Calhoun, Chickasaw, DeSoto, Itawamba and 14 more	91 min
May 2, 1:02 PM CDT	Mesoscale Discussion	SPC	Itawamba	118 min
May 1, 9:14 PM CDT	Mesoscale Discussion	SPC	Hardeman	91 min
May 1, 11:00 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Cooke, Fannin, Grayson, Hardeman, Lamar and 3 more	8 hr
May 2, 2:03 AM CDT	Mesoscale Discussion	SPC	Wichita	117 min
May 2, 12:38 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Austin, Bastrop, Bell, Bexar, Blanco and 54 more	9 hr
May 2, 1:23 PM CDT	Mesoscale Discussion	SPC	Crockett, Edwards, Kerr, Kimble, Kinney, Mason and 6 more	2 hr
May 2, 2:05 PM CDT	Mesoscale Discussion	SPC	Anderson, Austin, Bastrop, Bell, Bexar, Blanco and 46 more	85 min
May 2, 3:10 PM CDT	Severe Thunderstorm Watch	SPC	Atascosa, Bandera, Crockett, Dimmit, Edwards, Frio and 10 more	8 hr
May 2, 3:44 PM CDT	Mesoscale Discussion	SPC	Atascosa, Austin, Bandera, Bastrop, Bell, Bexar and 55 more	91 min

Nearby

Mesoscale Discussions in Mississippi, 2025 Mesoscale Discussions in Louisiana, 2025 Mesoscale Discussions in Texas, 2025 Every mesoscale discussion in 2025

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.