Alert archive / Arkansas / Mesoscale Discussions in 2005

Mesoscale Discussion 986

May 24, 20059 counties in Arkansas; 7 parishes in Louisiana; 9 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at May 24, 2005, 12:43 PM CDT for 9 counties in Arkansas; 7 parishes in Louisiana; 9 counties in Mississippi. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 24, 2005, 12:43 PM CDT (17:43 UTC)
Expired: May 24, 2005, 2:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 25 counties

Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Cleveland County, AR, Desha County, AR, Drew County, AR, Lincoln County, AR, Union County, AR, East Carroll Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Union Parish, LA, West Carroll Parish, LA, Hinds County, MS, Humphreys County, MS, Issaquena County, MS, Madison County, MS, Rankin County, MS, Sharkey County, MS, Warren County, MS, Washington County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 135 km from the middle of the area, began a volume at 17:45 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, 5.7 hours before the alert went out and 125 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: 1939 J/kg
Mixed-layer CIN: -68 J/kg
Mixed-layer LCL: 1053 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 89 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.2

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
May 24, 2:35 AM CDT	Severe Thunderstorm Watch	SPC	Benton, Crawford, Franklin, Logan, Madison, Montgomery and 4 more	7 hr
May 24, 5:40 AM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Franklin, Logan, Madison and 5 more	95 min
May 24, 9:13 AM CDT	Mesoscale Discussion	SPC	Benton	32 min
May 24, 10:30 AM CDT	Mesoscale Discussion	SPC	Arkansas, Benton, Boone, Calhoun, Carroll, Clark and 37 more	90 min
May 24, 10:55 AM CDT	Severe Thunderstorm Watch	SPC	Benton, Boone, Calhoun, Carroll, Clark, Cleveland and 36 more	8 hr
May 24, 1:21 PM CDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Clark, Cleveland, Conway and 31 more	114 min
May 24, 3:42 PM CDT	Mesoscale Discussion	SPC	Clark, Cleveland, Conway, Crawford, Dallas, Faulkner and 25 more	93 min
May 24, 4:50 PM CDT	Severe Thunderstorm Watch	SPC	Bradley, Calhoun, Clark, Columbia, Crawford, Dallas and 23 more	7 hr

Nearby

Mesoscale Discussions in Arkansas, 2005 Mesoscale Discussions in Mississippi, 2005 Mesoscale Discussions in Louisiana, 2005 Every mesoscale discussion in 2005

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.