Alert archive / Arkansas / Mesoscale Discussions in 2003

Mesoscale Discussion 1324

June 11, 200325 counties in Arkansas; Bolivar County, Coahoma County, Tunica County, Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2003, 1:53 PM CDT for 25 counties in Arkansas; Bolivar County, Coahoma County, Tunica County, Mississippi. It was in force for 67 min.

The area

The outline as issued.

The facts

Issued
Jun 11, 2003, 1:53 PM CDT (18:53 UTC)
Expired
Jun 11, 2003, 3:00 PM CDT
In force
67 min
Issued by
the Storm Prediction Center
All 28 counties

Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Clark County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Grant County, AR, Hempstead County, AR, Howard County, AR, Jefferson County, AR, Lafayette County, AR, Lincoln County, AR, Little River County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Phillips County, AR, Pike County, AR, Sevier County, AR, Union County, AR, Bolivar County, MS, Coahoma County, MS, Tunica County, MS

The radar

The Little Rock radar (KLZK), 120 km from the middle of the area, began a volume at 18:53 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

Shreveport, LA (KSHV), launched 12:00Z, 6.9 hours before the alert went out and 176 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, Shreveport, LA at 12:00Z on 2003-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2113 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, Shreveport, LA at 12:00Z on 2003-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 175 square meters per square second.193958Sfc1 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
2113 J/kg
Mixed-layer CIN
-26 J/kg
Mixed-layer LCL
660 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
175 m²/s²
0-3 km storm-relative helicity
223 m²/s²
Significant tornado parameter
1.4
Supercell composite
8.4

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 10, 9:38 PM CDTMesoscale DiscussionSPCBenton, Crawford, Franklin, Polk, Scott, Sebastian and 1 more2 hr
Jun 11, 1:48 AM CDTMesoscale DiscussionSPCBaxter, Boone, Carroll, Clark, Columbia, Conway and 37 more3 hr
Jun 11, 4:53 AM CDTMesoscale DiscussionSPCArkansas, Bradley, Chicot, Clay, Cleburne, Cleveland and 25 more3 hr
Jun 11, 6:10 AM CDTSevere Thunderstorm WatchSPCAshley, Bradley, Calhoun, Chicot, Clark, Cleveland and 12 more5 hr
Jun 11, 7:54 AM CDTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Chicot, Clark, Cleveland and 12 more2 hr
Jun 11, 9:21 AM CDTMesoscale DiscussionSPCAlcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 44 more54 min
Jun 11, 10:33 AM CDTMesoscale DiscussionSPCAmite, Attala, Claiborne, Clarke, Copiah, Covington and 28 more87 min
Jun 11, 10:45 AM CDTSevere Thunderstorm WatchSPCAlcorn, Benton, Calhoun, Carroll, Chickasaw, Choctaw and 24 more5 hr
Jun 11, 12:26 PM CDTMesoscale DiscussionSPCAlcorn, Benton, Calhoun, Carroll, Chickasaw, Choctaw and 24 more64 min
Jun 11, 3:01 PM CDTMesoscale DiscussionSPCAlcorn, Benton, Calhoun, Carroll, Chickasaw, Choctaw and 24 more29 min
Jun 11, 3:30 PM CDTSevere Thunderstorm WatchSPCAlcorn, Benton, Bolivar, Calhoun, Chickasaw, Coahoma and 17 more5 hr
Jun 11, 4:57 PM CDTMesoscale DiscussionSPCAlcorn, Benton, Calhoun, Chickasaw, Itawamba, Lafayette and 12 more93 min

Nearby

Mesoscale Discussions in Arkansas, 2003Mesoscale Discussions in Mississippi, 2003Every 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.