Alert archive / Mississippi / Mesoscale Discussions in 2020

Mesoscale Discussion 150

March 4, 20205 states

The Storm Prediction Center issued this mesoscale discussion at Mar 4, 2020, 1:19 AM CST for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Mar 4, 2020, 1:19 AM CST (07:19 UTC)
Expired: Mar 4, 2020, 3:45 AM CST
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 95%

All 94 counties

Baldwin County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Escambia County, AL, Marengo County, AL, Mobile County, AL, Monroe County, AL, Sumter County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Santa Rosa County, FL, Avoyelles Parish, LA, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Catahoula 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, Saint Helena Parish, LA, Tensas Parish, LA, Union Parish, LA, Vernon Parish, LA, Washington Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Adams County, MS, Amite County, MS, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, George County, MS, Greene County, MS, Harrison County, MS, Hinds County, MS, Issaquena County, MS, Jackson County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Warren County, MS, Wayne County, MS, Wilkinson County, MS, Yazoo County, MS, Angelina County, TX, Jasper County, TX, Nacogdoches County, TX, Newton County, TX, Panola County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Tyler County, TX

The radar

The Jackson/Brandon,MS radar (KDGX), 94 km from the middle of the area, began a volume at 07:20 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 7.3 hours before the alert went out and 94 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: 47 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 1002 m above ground
0-6 km bulk shear: 78 kt
0-1 km storm-relative helicity: -48 m²/s²
0-3 km storm-relative helicity: 215 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
Mar 4, 1:53 AM CST	Tornado Watch	SPC	Baldwin, Butler, Choctaw, Clarke, Conecuh, Covington and 6 more	8 hr
Mar 4, 2:39 AM CST	Severe Thunderstorm Watch	SPC	Autauga, Barbour, Bullock, Dallas, Elmore, Greene and 9 more	6 hr
Mar 4, 6:37 AM CST	Mesoscale Discussion	SPC	Barbour, Butler, Coffee, Conecuh, Covington, Crenshaw and 7 more	2 hr
Mar 4, 9:16 AM CST	Tornado Watch	SPC	Coffee, Dale, Geneva, Henry, Houston	6 hr
Mar 4, 5:05 PM CST	Mesoscale Discussion	SPC	Mobile	2 hr
Mar 4, 11:34 AM CST	Mesoscale Discussion	SPC	Gadsden, Jackson, Washington	86 min
Mar 4, 1:50 PM CST	Mesoscale Discussion	SPC	Hamilton, Nassau	55 min
Mar 4, 4:20 AM CST	Mesoscale Discussion	SPC	Bienville, Bossier, Caddo, Caldwell, De Soto, Grant and 11 more	115 min
Mar 4, 5:02 AM CST	Severe Thunderstorm Watch	SPC	Allen, Avoyelles, Beauregard, Bienville, Caldwell, De Soto and 12 more	7 hr
Mar 4, 10:50 AM CST	Mesoscale Discussion	SPC	Allen, Avoyelles, Beauregard, Bienville, Caldwell, Catahoula and 24 more	115 min
Mar 4, 1:57 PM CST	Mesoscale Discussion	SPC	Ascension, Assumption, East Baton Rouge, Iberia, Iberville, Jefferson and 17 more	2 hr
Mar 3, 9:05 PM CST	Mesoscale Discussion	SPC	Bandera, Bastrop, Bell, Blanco, Burleson, Burnet and 23 more	2 hr
Mar 4, 2:03 AM CST	Mesoscale Discussion	SPC	Bandera, Edwards, Gillespie, Kendall, Kerr, Kimble and 11 more	117 min
Mar 4, 2:28 AM CST	Severe Thunderstorm Watch	SPC	Bandera, Bexar, Blanco, Burnet, Comal, Edwards and 13 more	6 hr
Mar 4, 7:33 AM CST	Severe Thunderstorm Watch	SPC	Anderson, Brazos, Burleson, Falls, Freestone, Grimes and 10 more	4 hr

Nearby

Mesoscale Discussions in Mississippi, 2020 Mesoscale Discussions in Louisiana, 2020 Mesoscale Discussions in Alabama, 2020 Every mesoscale discussion 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.