Alert archive / Arkansas / Mesoscale Discussions in 2003

Mesoscale Discussion 231

March 13, 20035 states

The Storm Prediction Center issued this mesoscale discussion at Mar 13, 2003, 1:35 AM CST for 5 states. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
Mar 13, 2003, 1:35 AM CST (07:35 UTC)
Expired
Mar 13, 2003, 3:30 AM CST
In force
115 min
Issued by
the Storm Prediction Center
All 73 counties

Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Faulkner County, AR, Fulton County, AR, Greene County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Lawrence County, AR, Mississippi County, AR, Perry County, AR, Poinsett County, AR, Pope County, AR, Prairie County, AR, Randolph 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, Alexander County, IL, Franklin County, IL, Hamilton County, IL, Jackson County, IL, Jefferson County, IL, Johnson County, IL, Massac County, IL, Perry County, IL, Pope County, IL, Pulaski County, IL, Saline County, IL, Union County, IL, Williamson County, IL, Ballard County, KY, Calloway County, KY, Carlisle County, KY, Fulton County, KY, Graves County, KY, Hickman County, KY, Livingston County, KY, Marshall County, KY, McCracken County, KY, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Oregon County, MO, Pemiscot County, MO, Perry County, MO, Ripley County, MO, Scott County, MO, Stoddard County, MO, Wayne County, MO, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Haywood County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN, Weakley County, TN

The nearest sounding before it

Little Rock, AR (KLZK), launched 00:00Z, 7.6 hours before the alert went out and 186 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 2003-03-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 648 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 2003-03-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 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
648 J/kg
Mixed-layer CIN
-19 J/kg
Mixed-layer LCL
1382 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
58 m²/s²
0-3 km storm-relative helicity
178 m²/s²
Significant tornado parameter
0.2
Supercell composite
2.7

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
Mar 12, 9:52 PM CSTMesoscale DiscussionSPCBaxter, Boone, Carroll, Fulton, Marion, Sharp113 min
Mar 13, 12:56 AM CSTMesoscale DiscussionSPCClark, Columbia, Garland, Hempstead, Hot Spring, Howard and 9 more2 hr
Mar 12, 9:28 PM CSTMesoscale DiscussionSPCChristian, Clark, Coles, Cumberland, Douglas, Greene and 9 more2 hr
Mar 13, 12:00 AM CSTSevere Thunderstorm WatchSPCBond, Calhoun, Clinton, Fayette, Jersey, Macoupin and 5 more5 hr
Mar 12, 7:48 PM CSTMesoscale DiscussionSPCBarry, Barton, Bates, Benton, Boone, Callaway and 35 more57 min
Mar 12, 8:25 PM CSTSevere Thunderstorm WatchSPCAudrain, Barry, Barton, Bates, Benton, Boone and 44 more6 hr
Mar 12, 11:41 PM CSTMesoscale DiscussionSPCButler, Callaway, Camden, Carter, Christian, Cole and 28 more94 min
Mar 13, 12:55 PM CSTMesoscale DiscussionSPCBlount, Carter, Cocke, Grainger, Greene, Hamblen and 11 more2 hr

Nearby

Mesoscale Discussions in Arkansas, 2003Mesoscale Discussions in Illinois, 2003Mesoscale Discussions in Missouri, 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.