Alert archive / Arkansas / Mesoscale Discussions in 2011

Mesoscale Discussion 1428

June 28, 20114 states

The Storm Prediction Center issued this mesoscale discussion at Jun 28, 2011, 6:34 AM CDT for 4 states. It was in force for 86 min.

The area

The outline as issued.

The facts

Issued
Jun 28, 2011, 6:34 AM CDT (11:34 UTC)
Expired
Jun 28, 2011, 8:00 AM CDT
In force
86 min
Issued by
the Storm Prediction Center
All 51 counties

Arkansas County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Jefferson County, AR, Lawrence County, AR, Lee County, AR, Lonoke County, AR, Mississippi County, AR, Monroe County, AR, Newton County, AR, Perry County, AR, Phillips County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Searcy County, AR, Sharp County, AR, St. Francis County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Dunklin County, MO, Benton County, MS, Coahoma County, MS, DeSoto County, MS, Lafayette County, MS, Marshall County, MS, Panola County, MS, Quitman County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Fayette County, TN, Hardeman County, TN, Haywood County, TN, Lauderdale County, TN, Shelby County, TN, Tipton County, TN

The radar

The Little Rock radar (KLZK), 103 km from the middle of the area, began a volume at 11:36 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 00:00Z, 11.6 hours before the alert went out and 132 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 00:00Z on 2011-06-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2004 joules per kilogram.LCLLFCEL10008507005003002001001 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 00:00Z on 2011-06-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 89 square meters per square second.1939Sfc1 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
2004 J/kg
Mixed-layer CIN
-235 J/kg
Mixed-layer LCL
1921 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
89 m²/s²
0-3 km storm-relative helicity
275 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
Jun 27, 7:05 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Clay, Fulton and 9 more115 min
Jun 28, 4:08 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Clay, Cleburne and 25 more82 min
Jun 28, 4:17 AM CDTSevere Thunderstorm WatchSPCBaxter, Boone, Carroll, Clay, Cleburne, Craighead and 20 more8 hr
Jun 28, 7:06 AM CDTSevere Thunderstorm WatchSPCArkansas, Bradley, Calhoun, Clark, Cleveland, Conway and 22 more5 hr
Jun 28, 9:52 AM CDTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Chicot, Dallas, Drew and 1 more113 min
Jun 28, 10:26 AM CDTSevere Thunderstorm WatchSPCAshley, Chicot8 hr
Jun 28, 11:42 AM CDTMesoscale DiscussionSPCBradley, Calhoun, Clark, Columbia, Dallas, Garland and 13 more93 min
Jun 28, 11:51 AM CDTSevere Thunderstorm WatchSPCBradley, Calhoun, Clark, Cleveland, Columbia, Conway and 28 more7 hr
Jun 28, 3:09 PM CDTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Clark, Cleveland, Columbia and 27 more96 min
Jun 28, 6:09 PM CDTMesoscale DiscussionSPCColumbia, Hempstead, Howard, Lafayette, Little River, Miller and 3 more96 min
Jun 28, 6:08 AM CDTMesoscale DiscussionSPCAlcorn, Prentiss, Tippah, Tishomingo97 min
Jun 28, 3:19 PM CDTMesoscale DiscussionSPCAdams, Claiborne, Clarke, Copiah, Covington, Franklin and 6 more116 min
Jun 28, 1:44 PM CDTMesoscale DiscussionSPCCarter, Cocke, Greene, Johnson, Sullivan, Unicoi and 1 more91 min

Nearby

Mesoscale Discussions in Arkansas, 2011Mesoscale Discussions in Mississippi, 2011Mesoscale Discussions in Tennessee, 2011Every mesoscale discussion in 2011

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.