Alert archive / Mississippi / Mesoscale Discussions in 2014

Mesoscale Discussion 903

June 8, 201422 counties in Alabama; 31 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2014, 3:08 PM CDT for 22 counties in Alabama; 31 counties in Mississippi. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Jun 8, 2014, 3:08 PM CDT (20:08 UTC)
Expired: Jun 8, 2014, 4:45 PM CDT
In force: 97 min
Issued by: the Storm Prediction Center

All 53 counties

Autauga County, AL, Bibb County, AL, Chilton County, AL, Choctaw County, AL, Clay County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lowndes County, AL, Marengo County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Shelby County, AL, Sumter County, AL, Talladega County, AL, Tallapoosa County, AL, Tuscaloosa County, AL, Wilcox County, AL, Attala County, MS, Carroll County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Clay County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Jasper 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, Rankin County, MS, Scott County, MS, Sharkey County, MS, Smith 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), 112 km from the middle of the area, began a volume at 20:10 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, 8.1 hours before the alert went out and 119 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: 2135 J/kg
Mixed-layer CIN: -48 J/kg
Mixed-layer LCL: 903 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: -24 m²/s²
Significant tornado parameter: -0.1
Supercell composite: -0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 7, 8:28 PM CDT	Mesoscale Discussion	SPC	Blount, Calhoun, Cherokee, Cleburne, Cullman, Etowah and 7 more	2 hr
Jun 8, 11:24 AM CDT	Mesoscale Discussion	SPC	Autauga, Bibb, Chilton, Dallas, Greene, Hale and 4 more	66 min
Jun 8, 12:49 PM CDT	Severe Thunderstorm Watch	SPC	Autauga, Barbour, Bibb, Bullock, Chilton, Clay and 21 more	8 hr
Jun 8, 1:11 PM CDT	Mesoscale Discussion	SPC	Butler, Clarke, Coffee, Conecuh, Covington, Crenshaw and 6 more	3 hr
Jun 8, 1:49 PM CDT	Severe Thunderstorm Watch	SPC	Butler, Choctaw, Clarke, Coffee, Conecuh, Covington and 8 more	7 hr
Jun 8, 3:23 PM CDT	Mesoscale Discussion	SPC	Barbour, Butler, Clarke, Coffee, Conecuh, Covington and 8 more	97 min
Jun 8, 2:19 PM CDT	Severe Thunderstorm Watch	SPC	Bolivar, Grenada, Leflore, Sunflower, Washington	7 hr

Nearby

Mesoscale Discussions in Mississippi, 2014 Mesoscale Discussions in Alabama, 2014 Every mesoscale discussion in 2014

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.