Alert archive / Arkansas / Mesoscale Discussions in 2003

Mesoscale Discussion 748

May 4, 20034 states

The Storm Prediction Center issued this mesoscale discussion at May 4, 2003, 9:42 PM CDT for 4 states. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
May 4, 2003, 9:42 PM CDT (02:42 UTC)
Expired
May 4, 2003, 11:15 PM CDT
In force
93 min
Issued by
the Storm Prediction Center
All 83 counties

Baxter County, AR, Benton County, AR, Boone County, AR, Carroll County, AR, Cleburne County, AR, Conway County, AR, Crawford County, AR, Faulkner County, AR, Franklin County, AR, Fulton County, AR, Garland County, AR, Independence County, AR, Izard County, AR, Johnson County, AR, Logan County, AR, Lonoke County, AR, Madison County, AR, Marion County, AR, Montgomery County, AR, Newton County, AR, Perry County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, Washington County, AR, White County, AR, Yell County, AR, Bourbon County, KS, Cherokee County, KS, Crawford County, KS, Barry County, MO, Barton County, MO, Camden County, MO, Carter County, MO, Cedar County, MO, Christian County, MO, Crawford County, MO, Dade County, MO, Dallas County, MO, Dent County, MO, Douglas County, MO, Greene County, MO, Hickory County, MO, Howell County, MO, Jasper County, MO, Laclede County, MO, Lawrence County, MO, McDonald County, MO, Newton County, MO, Oregon County, MO, Ozark County, MO, Phelps County, MO, Polk County, MO, Pulaski County, MO, Reynolds County, MO, Shannon County, MO, St. Clair County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Vernon County, MO, Washington County, MO, Webster County, MO, Wright County, MO, Adair County, OK, Cherokee County, OK, Craig County, OK, Delaware County, OK, Haskell County, OK, Latimer County, OK, LeFlore County, OK, Mayes County, OK, Muskogee County, OK, Ottawa County, OK, Sequoyah County, OK

The radar

The Springfield radar (KSGF), 65 km from the middle of the area, began a volume at 02:43 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

Springfield, MO (KSGF), launched 00:00Z, 2.7 hours before the alert went out and 33 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, Springfield, MO at 00:00Z on 2003-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2099 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, Springfield, MO at 00:00Z on 2003-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 321 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
2099 J/kg
Mixed-layer CIN
-4 J/kg
Mixed-layer LCL
756 m above ground
0-6 km bulk shear
74 kt
0-1 km storm-relative helicity
321 m²/s²
0-3 km storm-relative helicity
341 m²/s²
Significant tornado parameter
4.6
Supercell composite
15.8

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
May 4, 7:19 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 21 more86 min
May 4, 7:34 PM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Jackson and 7 more116 min
May 4, 9:26 PM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Jackson and 7 more2 hr
May 5, 12:50 AM CDTTornado WatchSPCBaxter, Benton, Boone, Carroll, Clark, Cleburne and 34 more5 hr
May 5, 1:20 AM CDTTornado WatchSPCArkansas, Clay, Craighead, Crittenden, Cross, Greene and 7 more6 hr
May 5, 4:18 AM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Independence and 14 more57 min
May 5, 4:55 AM CDTTornado WatchSPCClay, Craighead, Crittenden, Cross, Greene, Jackson and 9 more6 hr
May 5, 7:11 AM CDTMesoscale DiscussionSPCCrittenden, Cross, Lee, Mississippi, St. Francis2 hr
May 5, 9:56 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 33 more2 hr
May 5, 10:38 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 19 more3 hr
May 5, 10:40 AM CDTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 21 more5 hr
May 5, 1:05 PM CDTTornado WatchSPCCleburne, Conway, Craighead, Crawford, Crittenden, Cross and 21 more3 hr
May 5, 1:13 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Clark, Cleveland and 17 more2 hr
May 5, 3:25 PM CDTTornado WatchSPCArkansas, Ashley, Baxter, Boone, Bradley, Calhoun and 62 more7 hr
May 5, 5:18 PM CDTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Clark, Cleveland, Columbia and 24 more117 min
May 5, 5:40 PM CDTMesoscale DiscussionSPCAshley, Bradley, Chicot, Desha, Drew2 hr
May 4, 8:05 PM CDTMesoscale DiscussionSPCAudrain, Bollinger, Callaway, Cape Girardeau, Clark, Crawford and 27 more85 min
May 4, 9:05 PM CDTMesoscale DiscussionSPCBates, Benton, Boone, Caldwell, Carroll, Cass and 23 more85 min
May 4, 10:40 PM CDTTornado WatchSPCBollinger, Cape Girardeau, Franklin, Iron, Jefferson, Madison and 5 more5 hr
May 4, 11:05 PM CDTSevere Thunderstorm WatchSPCAudrain, Boone, Callaway, Cole, Franklin, Gasconade and 17 more5 hr
May 5, 1:30 AM CDTMesoscale DiscussionSPCBollinger, Cape Girardeau, Iron, Jefferson, Madison, Perry and 3 more90 min
May 5, 1:46 AM CDTMesoscale DiscussionSPCCity of Saint Louis89 min
May 5, 3:41 AM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Iron, Madison, Mississippi and 8 more34 min
May 5, 3:50 AM CDTTornado WatchSPCBollinger, Butler, Cape Girardeau, Iron, Jefferson, Madison and 9 more6 hr
May 5, 6:32 AM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Madison, Mississippi, New Madrid and 4 more88 min
May 5, 9:19 AM CDTMesoscale DiscussionSPCBollinger, Butler, Cape Girardeau, Madison, Mississippi, Perry and 5 more56 min
May 5, 2:35 PM CDTTornado WatchSPCNew Madrid, Pemiscot7 hr

Nearby

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