Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 1336

June 11, 20037 counties in Arkansas; 14 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2003, 7:14 PM CDT for 7 counties in Arkansas; 14 counties in Mississippi. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 11, 2003, 7:14 PM CDT (00:14 UTC)
Expired
Jun 11, 2003, 9:15 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 21 counties

Arkansas County, AR, Cleveland County, AR, Desha County, AR, Grant County, AR, Jefferson County, AR, Lincoln County, AR, Phillips County, AR, Bolivar County, MS, Calhoun County, MS, Chickasaw County, MS, Clay County, MS, Coahoma County, MS, Grenada County, MS, Lafayette County, MS, Panola County, MS, Pontotoc County, MS, Quitman County, MS, Sunflower County, MS, Tallahatchie County, MS, Webster County, MS, Yalobusha County, MS

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, 0.2 hours before the alert went out and 111 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 2003-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3192 joules per kilogram.LCLEL10008507005003002001001 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 2003-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 108 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
3192 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
832 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
108 m²/s²
0-3 km storm-relative helicity
163 m²/s²
Significant tornado parameter
1.8
Supercell composite
11.7

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 11, 7:50 PM CDTSevere Thunderstorm WatchSPCAshley, Chicot, Desha, Drew5 hr
Jun 11, 9:18 PM CDTMesoscale DiscussionSPCChicot87 min
Jun 11, 10:25 PM CDTSevere Thunderstorm WatchSPCCrawford, Howard, Montgomery, Pike, Polk, Scott and 2 more5 hr
Jun 12, 12:14 AM CDTMesoscale DiscussionSPCColumbia, Hempstead, Howard, Lafayette, Little River, Miller and 7 more2 hr
Jun 12, 1:10 AM CDTSevere Thunderstorm WatchSPCHempstead, Lafayette, Little River, Miller, Nevada4 hr
Jun 12, 4:20 AM CDTMesoscale DiscussionSPCColumbia, Lafayette, Miller55 min
Jun 12, 8:51 AM CDTMesoscale DiscussionSPCAdams, Amite, Covington, Forrest, Franklin, George and 17 more84 min
Jun 12, 9:10 AM CDTSevere Thunderstorm WatchSPCAmite, Clarke, Copiah, Covington, Forrest, Franklin and 21 more5 hr
Jun 12, 11:10 AM CDTMesoscale DiscussionSPCCovington, Forrest, George, Greene, Hancock, Harrison and 12 more95 min
Jun 12, 1:15 PM CDTMesoscale DiscussionSPCForrest, George, Greene, Hancock, Harrison, Jackson and 6 more60 min
Jun 12, 4:40 PM CDTSevere Thunderstorm WatchSPCAdams, Amite, Covington, Forrest, Franklin, George and 17 more4 hr

Nearby

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