Alert archive / Mississippi / Mesoscale Discussions in 2008

Mesoscale Discussion 158

February 5, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Feb 5, 2008, 12:11 PM CST for 4 states. It was in force for 94 min.

The area

The outline as issued.

The facts

Issued: Feb 5, 2008, 12:11 PM CST (18:11 UTC)
Expired: Feb 5, 2008, 1:45 PM CST
In force: 94 min
Issued by: the Storm Prediction Center

All 65 counties

Arkansas County, AR, Ashley County, AR, Chicot County, AR, Crittenden County, AR, Cross County, AR, Desha County, AR, Drew County, AR, Lee County, AR, Mississippi County, AR, Monroe County, AR, Phillips County, AR, Poinsett County, AR, St. Francis County, AR, East Carroll Parish, LA, Morehouse Parish, LA, West Carroll Parish, LA, Alcorn County, MS, Attala County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Clay County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Lafayette County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Madison County, MS, Marshall County, MS, Montgomery County, MS, Neshoba County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Union County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, Crockett County, TN, Fayette County, TN, Hardeman County, TN, Haywood County, TN, Lauderdale County, TN, Madison County, TN, Shelby County, TN, Tipton County, TN

The radar

The Memphis radar (KNQA), 175 km from the middle of the area, began a volume at 18:12 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

Little Rock, AR (KLZK), launched 12:00Z, 6.2 hours before the alert went out and 118 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: 654 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 593 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 250 m²/s²
0-3 km storm-relative helicity: 222 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 3.3

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
Feb 4, 9:21 PM CST	Mesoscale Discussion	SPC	Clay, Fulton, Greene, Randolph, Sharp	84 min
Feb 5, 6:39 AM CST	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Clark, Cleburne and 32 more	3 hr
Feb 5, 9:47 AM CST	Mesoscale Discussion	SPC	Clay, Craighead, Crittenden, Cross, Greene, Jackson and 5 more	88 min
Feb 5, 10:18 AM CST	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Crawford, Franklin, Johnson and 7 more	87 min
Feb 5, 11:16 AM CST	Mesoscale Discussion	SPC	Arkansas, Ashley, Baxter, Bradley, Calhoun, Clark and 53 more	89 min
Feb 5, 11:56 AM CST	Tornado Watch	SPC	Howard, Little River, Miller, Sevier	7 hr
Feb 5, 12:39 PM CST	Tornado Watch	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 14 more	7 hr
Feb 5, 2:08 PM CST	Tornado Watch PDS	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 33 more	10 hr
Feb 5, 3:09 PM CST	Tornado Watch PDS	SPC	Clay, Craighead, Crittenden, Cross, Greene, Lawrence and 6 more	9 hr
Feb 5, 3:17 PM CST	Mesoscale Discussion	SPC	Baxter, Boone, Carroll, Crawford, Franklin, Johnson and 9 more	88 min
Feb 5, 3:36 PM CST	Mesoscale Discussion	SPC	Ashley, Bradley, Calhoun, Clark, Cleburne, Cleveland and 19 more	84 min
Feb 5, 5:39 PM CST	Mesoscale Discussion	SPC	Arkansas, Baxter, Bradley, Calhoun, Clark, Clay and 42 more	96 min
Feb 5, 5:15 PM CST	Mesoscale Discussion	SPC	Alcorn, Benton, Coahoma, DeSoto, Lafayette, Marshall and 7 more	2 hr

Nearby

Mesoscale Discussions in Mississippi, 2008 Mesoscale Discussions in Arkansas, 2008 Mesoscale Discussions in Tennessee, 2008 Every mesoscale discussion in 2008

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.