Alert archive / Arkansas / Mesoscale Discussions in 2003

Mesoscale Discussion 1953

July 22, 20039 counties in Arkansas; 4 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jul 22, 2003, 4:47 AM CDT for 9 counties in Arkansas; 4 counties in Mississippi. It was in force for 118 min.

The area

The outline as issued.

The facts

Issued: Jul 22, 2003, 4:47 AM CDT (09:47 UTC)
Expired: Jul 22, 2003, 6:45 AM CDT
In force: 118 min
Issued by: the Storm Prediction Center

Counties Cross County, AR, Lee County, AR, Lonoke County, AR, Monroe County, AR, Phillips County, AR, Prairie County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Coahoma County, MS, Quitman County, MS, Tate County, MS, Tunica County, MS

The radar

The Little Rock radar (KLZK), 107 km from the middle of the area, began a volume at 09:47 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

Little Rock, AR (KLZK), launched 00:00Z, 9.8 hours before the alert went out and 105 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: 3035 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 1538 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 227 m²/s²
Significant tornado parameter: 0.3
Supercell composite: 9.5

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
Jul 21, 7:06 PM CDT	Mesoscale Discussion	SPC	Cleburne, Craighead, Faulkner, Greene, Independence, Izard and 8 more	84 min
Jul 21, 11:39 PM CDT	Mesoscale Discussion	SPC	Benton	2 hr
Jul 22, 1:20 AM CDT	Severe Thunderstorm Watch	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Crawford and 10 more	7 hr
Jul 22, 2:49 AM CDT	Mesoscale Discussion	SPC	Arkansas, Clark, Cleburne, Conway, Crawford, Crittenden and 31 more	116 min
Jul 22, 3:45 AM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Clark, Cleburne, Conway, Crawford, Crittenden and 30 more	5 hr
Jul 22, 6:29 AM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, DeSoto, Marshall, Prentiss, Tippah and 2 more	91 min
Jul 22, 6:40 AM CDT	Severe Thunderstorm Watch	SPC	Alcorn, Benton, Itawamba, Lee, Pontotoc, Prentiss and 3 more	3 hr
Jul 22, 1:42 PM CDT	Mesoscale Discussion	SPC	Adams, Amite, Claiborne, Copiah, Covington, Forrest and 18 more	2 hr
Jul 22, 2:30 PM CDT	Severe Thunderstorm Watch	SPC	Adams, Amite, Claiborne, Clarke, Copiah, Covington and 29 more	6 hr
Jul 22, 2:40 PM CDT	Severe Thunderstorm Watch	SPC	George, Greene, Jackson, Wayne	5 hr
Jul 22, 6:21 PM CDT	Mesoscale Discussion	SPC	Adams, Amite, Claiborne, Copiah, Covington, Forrest and 24 more	54 min

Nearby

Mesoscale Discussions in Arkansas, 2003 Mesoscale Discussions in Mississippi, 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; radar from the NEXRAD Level II archive.