Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 562

April 24, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2003, 2:46 PM CDT for 4 states. It was in force for 119 min.

The area

The outline as issued.

The facts

Issued: Apr 24, 2003, 2:46 PM CDT (19:46 UTC)
Expired: Apr 24, 2003, 4:45 PM CDT
In force: 119 min
Issued by: the Storm Prediction Center

All 70 counties

Bibb County, AL, Choctaw County, AL, Dallas County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Lamar County, AL, Marengo County, AL, Perry County, AL, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL, Chicot County, AR, East Carroll Parish, LA, Madison Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Attala County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lafayette County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lincoln County, MS, Lowndes County, MS, Madison County, MS, Marion County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Tallahatchie County, MS, Union County, MS, Warren County, MS, Washington County, MS, Wayne County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS

The watches that followed

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

Tornado Watch 160Apr 24, 6:35 PM CDT

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 7.8 hours before the alert went out and 83 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: 458 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 741 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 297 m²/s²
0-3 km storm-relative helicity: 439 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 9.3

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
Apr 24, 5:17 PM CDT	Mesoscale Discussion	SPC	Baldwin, Mobile, Washington	118 min
Apr 23, 11:43 PM CDT	Mesoscale Discussion	SPC	Howard, Lafayette, Little River, Miller, Polk, Sevier	2 hr
Apr 24, 2:41 AM CDT	Mesoscale Discussion	SPC	Columbia, Lafayette, Miller, Nevada, Ouachita	2 hr
Apr 24, 10:12 AM CDT	Mesoscale Discussion	SPC	Arkansas, Cleburne, Conway, Craighead, Crittenden, Cross and 20 more	2 hr
Apr 24, 12:47 PM CDT	Mesoscale Discussion	SPC	Arkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 38 more	3 hr
Apr 24, 1:00 PM CDT	Tornado Watch	SPC	Arkansas, Bradley, Calhoun, Clark, Cleveland, Columbia and 25 more	7 hr
Apr 24, 2:05 PM CDT	Tornado Watch	SPC	Ashley, Chicot	6 hr
Apr 24, 3:25 PM CDT	Tornado Watch	SPC	Baxter, Boone, Cleburne, Conway, Faulkner, Fulton and 19 more	5 hr
Apr 24, 3:28 PM CDT	Mesoscale Discussion	SPC	Arkansas, Clark, Cleburne, Cleveland, Conway, Craighead and 32 more	2 hr
Apr 24, 5:52 PM CDT	Mesoscale Discussion	SPC	Arkansas, Baxter, Boone, Clay, Cleburne, Cleveland and 36 more	113 min
Apr 24, 6:35 PM CDT	Tornado Watch	SPC	Arkansas, Baxter, Clay, Cleburne, Cleveland, Conway and 33 more	5 hr
Apr 24, 6:49 PM CDT	Mesoscale Discussion	SPC	Chicot	56 min
Apr 24, 6:30 AM CDT	Severe Thunderstorm Watch	SPC	Avoyelles, Beauregard, Bienville, Caldwell, Catahoula, Concordia and 17 more	5 hr
Apr 24, 6:40 AM CDT	Severe Thunderstorm Watch	SPC	Avoyelles, Beauregard, Bienville, Caldwell, Catahoula, Concordia and 17 more	4 hr
Apr 24, 9:39 AM CDT	Mesoscale Discussion	SPC	Caldwell, Catahoula, Concordia, Grant, LaSalle, Tensas and 1 more	2 hr
Apr 24, 11:40 AM CDT	Mesoscale Discussion	SPC	Bienville, Bossier, Caddo, Caldwell, Catahoula, Concordia and 10 more	65 min

Nearby

Mesoscale Discussions in Mississippi, 2003 Mesoscale Discussions in Alabama, 2003 Mesoscale Discussions in Louisiana, 2003 Every mesoscale discussion in 2003

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.