Alert archive / Mississippi / Mesoscale Discussions in 2020

Mesoscale Discussion 76

February 5, 20204 states

The Storm Prediction Center issued this mesoscale discussion at Feb 5, 2020, 11:16 AM CST for 4 states. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Feb 5, 2020, 11:16 AM CST (17:16 UTC)
Expired: Feb 5, 2020, 1:15 PM CST
In force: 119 min
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 21 counties

Baldwin County, AL, Clarke County, AL, Conecuh County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Escambia County, FL, Santa Rosa County, FL, Orleans Parish, LA, Saint Bernard Parish, LA, Saint Charles Parish, LA, Saint Tammany Parish, LA, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 55 km from the middle of the area, began a volume at 17:17 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 5.3 hours before the alert went out and 95 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: 743 J/kg
Mixed-layer CIN: -16 J/kg
Mixed-layer LCL: 509 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 195 m²/s²
0-3 km storm-relative helicity: 380 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.4

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
Feb 5, 3:47 PM CST	Mesoscale Discussion	SPC	Bibb, Blount, Calhoun, Cherokee, Chilton, Clay and 28 more	118 min
Feb 5, 4:25 PM CST	Tornado Watch	SPC	Bibb, Blount, Calhoun, Cherokee, Chilton, Colbert and 28 more	5 hr
Feb 5, 5:06 PM CST	Mesoscale Discussion	SPC	Choctaw, Clarke, Marengo, Sumter, Washington	84 min
Feb 5, 5:50 PM CST	Tornado Watch	SPC	Choctaw, Clarke, Washington	6 hr
Feb 5, 10:28 AM CST	Mesoscale Discussion	SPC	Allen, Avoyelles, Catahoula, Concordia, Evangeline, LaSalle and 4 more	92 min
Feb 5, 11:49 AM CST	Tornado Watch	SPC	Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 24 more	6 hr
Feb 5, 1:19 PM CST	Mesoscale Discussion	SPC	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Livingston and 9 more	86 min
Feb 5, 1:39 PM CST	Mesoscale Discussion	SPC	Catahoula, Concordia, Madison, Tensas	96 min
Feb 5, 3:41 PM CST	Mesoscale Discussion	SPC	Concordia, East Baton Rouge, East Feliciana, Pointe Coupee, Saint Helena, Tensas and 2 more	64 min

Nearby

Mesoscale Discussions in Mississippi, 2020 Mesoscale Discussions in Alabama, 2020 Mesoscale Discussions in Louisiana, 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.