Alert archive / Arkansas / Mesoscale Discussions in 2004

Mesoscale Discussion 444

April 23, 20048 counties in Arkansas; 8 counties in Mississippi; 4 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2004, 7:33 AM CDT for 8 counties in Arkansas; 8 counties in Mississippi; 4 counties in Tennessee. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Apr 23, 2004, 7:33 AM CDT (12:33 UTC)
Expired: Apr 23, 2004, 9:00 AM CDT
In force: 87 min
Issued by: the Storm Prediction Center

Counties Craighead County, AR, Crittenden County, AR, Cross County, AR, Jackson County, AR, Lee County, AR, Poinsett County, AR, St. Francis County, AR, Woodruff County, AR, Benton County, MS, DeSoto County, MS, Lafayette County, MS, Marshall County, MS, Panola County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Fayette County, TN, Hardeman County, TN, Shelby County, TN, Tipton County, TN

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 0.6 hours before the alert went out and 19 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: 1480 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 464 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 176 m²/s²
0-3 km storm-relative helicity: 181 m²/s²
Significant tornado parameter: 1.4
Supercell composite: 6.1

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 22, 7:10 PM CDT	Mesoscale Discussion	SPC	Boone, Franklin, Howard, Johnson, Logan, Madison and 5 more	35 min
Apr 22, 7:50 PM CDT	Tornado Watch	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 10 more	4 hr
Apr 22, 9:50 PM CDT	Severe Thunderstorm Watch	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Conway and 25 more	6 hr
Apr 22, 10:52 PM CDT	Mesoscale Discussion	SPC	Conway, Pope, Searcy, Stone, Van Buren	53 min
Apr 22, 11:25 PM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Crittenden, Cross, Greene, Mississippi and 1 more	65 min
Apr 22, 11:40 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Craighead, Crittenden, Cross, Greene, Lawrence and 4 more	6 hr
Apr 23, 12:54 AM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Conway and 25 more	96 min
Apr 23, 3:12 AM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Crittenden, Cross, Greene, Lawrence and 5 more	93 min
Apr 23, 10:37 AM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Fulton, Izard and 3 more	113 min
Apr 23, 2:10 PM CDT	Severe Thunderstorm Watch	SPC	Benton, Crawford, Sebastian, Washington	6 hr
Apr 23, 6:01 PM CDT	Mesoscale Discussion	SPC	Crawford, Scott, Sebastian	59 min
Apr 23, 11:09 AM CDT	Mesoscale Discussion	SPC	Bedford, Bledsoe, Cannon, Cheatham, Coffee, Cumberland and 34 more	2 hr

Nearby

Mesoscale Discussions in Arkansas, 2004 Mesoscale Discussions in Mississippi, 2004 Mesoscale Discussions in Tennessee, 2004 Every mesoscale discussion in 2004

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.