Alert archive / Arkansas / Mesoscale Discussions in 2005

Mesoscale Discussion 707

April 29, 200525 counties in Arkansas; Dunklin County, Pemiscot County, Missouri; 5 counties in Tennessee

The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2005, 12:25 PM CDT for 25 counties in Arkansas; Dunklin County, Pemiscot County, Missouri; 5 counties in Tennessee. It was in force for 35 min.

The area

The outline as issued.

The facts

Issued
Apr 29, 2005, 12:25 PM CDT (17:25 UTC)
Expired
Apr 29, 2005, 1:00 PM CDT
In force
35 min
Issued by
the Storm Prediction Center
All 32 counties

Cleburne County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Greene County, AR, Independence County, AR, Jackson County, AR, Lawrence County, AR, Logan County, AR, Lonoke County, AR, Mississippi County, AR, Perry County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Dunklin County, MO, Pemiscot County, MO, Crockett County, TN, Dyer County, TN, Haywood County, TN, Lauderdale County, TN, Tipton County, TN

The radar

The Little Rock radar (KLZK), 70 km from the middle of the area, began a volume at 17:27 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, 5.4 hours before the alert went out and 181 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-pSkew-T log-p diagram, Little Rock, AR at 12:00Z on 2005-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Little Rock, AR at 12:00Z on 2005-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 95 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1155 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
95 m²/s²
0-3 km storm-relative helicity
198 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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.

IssuedProductOfficeCountiesLasted
Apr 28, 7:39 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 21 more96 min
Apr 28, 9:51 PM CDTMesoscale DiscussionSPCBaxter, Clay, Cleburne, Craighead, Fulton, Greene and 11 more84 min
Apr 29, 4:36 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Cleburne, Crawford and 15 more114 min
Apr 29, 6:20 AM CDTSevere Thunderstorm WatchSPCBaxter, Benton, Boone, Carroll, Clay, Cleburne and 30 more7 hr
Apr 29, 9:34 AM CDTMesoscale DiscussionSPCConway, Crittenden, Cross, Faulkner, Lee, Logan and 12 more116 min
Apr 29, 12:50 PM CDTSevere Thunderstorm WatchSPCCleburne, Conway, Craighead, Crittenden, Cross, Faulkner and 23 more6 hr
Apr 29, 2:28 PM CDTMesoscale DiscussionSPCBradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 13 more107 min
Apr 29, 3:35 PM CDTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 19 more7 hr
Apr 29, 3:40 PM CDTMesoscale DiscussionSPCCleburne, Conway, Craighead, Crittenden, Cross, Faulkner and 11 more2 hr
Apr 29, 6:04 PM CDTMesoscale DiscussionSPCCraighead, Crittenden, Cross, Lee, Mississippi, Poinsett and 1 more56 min
Apr 29, 6:29 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 16 more91 min
Apr 29, 6:55 PM CDTSevere Thunderstorm WatchSPCAnderson, Bedford, Benton, Bledsoe, Blount, Campbell and 57 more7 hr

Nearby

Mesoscale Discussions in Arkansas, 2005Mesoscale Discussions in Tennessee, 2005Mesoscale Discussions in Missouri, 2005Every 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.