Alert archive / Mississippi / Mesoscale Discussions in 2020

Mesoscale Discussion 844

June 5, 20205 counties in Arkansas; East Carroll Parish, West Carroll Parish, Louisiana; 28 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jun 5, 2020, 2:07 PM CDT for 5 counties in Arkansas; East Carroll Parish, West Carroll Parish, Louisiana; 28 counties in Mississippi. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Jun 5, 2020, 2:07 PM CDT (19:07 UTC)
Expired: Jun 5, 2020, 3:30 PM CDT
In force: 83 min
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch likely
Chance of a watch: 80%

All 35 counties

Ashley County, AR, Chicot County, AR, Desha County, AR, Drew County, AR, Lincoln County, AR, East Carroll Parish, LA, West Carroll Parish, LA, Attala County, MS, Bolivar County, MS, Carroll County, MS, Choctaw County, MS, Clay County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha 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

The radar

The Jackson/Brandon,MS radar (KDGX), 117 km from the middle of the area, began a volume at 19:06 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.

Severe Thunderstorm Watch 259Jun 5, 2:50 PM CDT

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 7.1 hours before the alert went out and 112 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: 960 J/kg
Mixed-layer CIN: -50 J/kg
Mixed-layer LCL: 813 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 25 m²/s²
0-3 km storm-relative helicity: 50 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
Jun 5, 10:38 AM CDT	Mesoscale Discussion	SPC	Arkansas, Clark, Clay, Cleburne, Cleveland, Conway and 35 more	2 hr
Jun 5, 11:03 AM CDT	Severe Thunderstorm Watch	SPC	Clay, Craighead, Crittenden, Cross, Greene, Lee and 4 more	6 hr
Jun 5, 1:18 PM CDT	Mesoscale Discussion	SPC	Crittenden, Cross, Lee, Mississippi, Poinsett, St. Francis	87 min
Jun 5, 2:49 PM CDT	Severe Thunderstorm Watch	SPC	Ashley, Chicot	6 hr
Jun 5, 5:02 PM CDT	Mesoscale Discussion	SPC	Chicot	88 min
Jun 5, 9:53 AM CDT	Mesoscale Discussion	SPC	Tishomingo	2 hr

Nearby

Mesoscale Discussions in Mississippi, 2020 Mesoscale Discussions in Arkansas, 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.