Alert archive / Arkansas / Mesoscale Discussions in 2004

Mesoscale Discussion 996

May 30, 20045 states

The Storm Prediction Center issued this mesoscale discussion at May 30, 2004, 2:44 PM CDT for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 30, 2004, 2:44 PM CDT (19:44 UTC)
Expired
May 30, 2004, 4:45 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 90 counties

Baxter County, AR, Boone County, AR, Carroll County, AR, Clark County, AR, Clay County, AR, Cleburne County, AR, Conway County, AR, Craighead County, AR, Crawford County, AR, Cross County, AR, Faulkner County, AR, Franklin County, AR, Fulton County, AR, Garland County, AR, Greene County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Izard County, AR, Jackson County, AR, Johnson County, AR, Lawrence County, AR, Little River County, AR, Logan County, AR, Lonoke County, AR, Madison County, AR, Marion County, AR, Mississippi County, AR, Montgomery County, AR, Newton County, AR, Perry County, AR, Pike County, AR, Poinsett County, AR, Polk County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Scott County, AR, Searcy County, AR, Sebastian County, AR, Sevier County, AR, Sharp County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, Bollinger County, MO, Butler County, MO, Cape Girardeau County, MO, Carter County, MO, Christian County, MO, Crawford County, MO, Dent County, MO, Douglas County, MO, Dunklin County, MO, Howell County, MO, Iron County, MO, Laclede County, MO, Madison County, MO, New Madrid County, MO, Oregon County, MO, Ozark County, MO, Pemiscot County, MO, Phelps County, MO, Pulaski County, MO, Reynolds County, MO, Ripley County, MO, Saint Francois County, MO, Scott County, MO, Shannon County, MO, Stoddard County, MO, Stone County, MO, Taney County, MO, Texas County, MO, Washington County, MO, Wayne County, MO, Webster County, MO, Wright County, MO, Choctaw County, OK, LeFlore County, OK, McCurtain County, OK, Pushmataha County, OK, Lauderdale County, TN, Bowie County, TX, Lamar County, TX, Red River County, TX

The radar

The Little Rock radar (KLZK), 102 km from the middle of the area, began a volume at 19:45 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 12:00Z, 7.7 hours before the alert went out and 177 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 12:00Z on 2004-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1630 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, Springfield, MO at 12:00Z on 2004-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 279 square meters per square second.19395878Sfc1 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
1630 J/kg
Mixed-layer CIN
-63 J/kg
Mixed-layer LCL
849 m above ground
0-6 km bulk shear
47 kt
0-1 km storm-relative helicity
279 m²/s²
0-3 km storm-relative helicity
303 m²/s²
Significant tornado parameter
2.8
Supercell composite
17.8

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 30, 9:40 AM CDTMesoscale DiscussionSPCBenton, Boone, Carroll, Crawford, Madison, Washington3 hr
May 30, 10:50 AM CDTTornado WatchSPCBaxter, Benton, Boone, Carroll, Conway, Crawford and 14 more8 hr
May 30, 12:15 PM CDTMesoscale DiscussionSPCClark, Hempstead, Hot Spring, Howard, Little River, Montgomery and 4 more90 min
May 30, 12:35 PM CDTTornado WatchSPCClark, Hempstead, Hot Spring, Howard, Lafayette, Little River and 3 more6 hr
May 30, 12:53 PM CDTMesoscale DiscussionSPCBenton, Boone, Carroll, Crawford, Madison, Washington2 hr
May 30, 3:20 PM CDTTornado WatchSPCArkansas, Calhoun, Clay, Cleburne, Cleveland, Craighead and 31 more8 hr
May 30, 5:10 PM CDTMesoscale DiscussionSPCArkansas, Baxter, Boone, Bradley, Calhoun, Clark and 59 more95 min
May 30, 5:53 PM CDTMesoscale DiscussionSPCConway, Crawford, Franklin, Garland, Hempstead, Howard and 13 more97 min
May 30, 6:10 PM CDTTornado WatchSPCBaxter, Boone, Carroll, Clark, Cleburne, Conway and 30 more5 hr
May 29, 8:45 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Clay, Clinton, DeKalb and 5 more60 min
May 29, 9:35 PM CDTTornado WatchSPCAndrew, Atchison, Buchanan, Caldwell, Cass, Clay and 13 more6 hr
May 29, 11:23 PM CDTMesoscale DiscussionSPCAndrew, Atchison, Buchanan, Caldwell, Clay, Clinton and 10 more67 min
May 30, 2:38 AM CDTMesoscale DiscussionSPCAndrew, Buchanan, Caldwell, Cass, Clay, Clinton and 17 more97 min
May 30, 10:04 AM CDTMesoscale DiscussionSPCCape Girardeau, Mississippi, Perry, Scott2 hr
May 30, 12:13 PM CDTMesoscale DiscussionSPCClark2 hr
May 30, 1:05 PM CDTTornado WatchSPCBollinger, Butler, Cape Girardeau, Carter, Crawford, Dent and 23 more6 hr
May 30, 6:40 PM CDTTornado WatchSPCBollinger, Butler, Cape Girardeau, Madison, Mississippi, New Madrid and 6 more6 hr
May 29, 8:27 PM CDTMesoscale DiscussionSPCCanadian, Creek, Garfield, Grant, Kay, Kingfisher and 9 more63 min
May 29, 9:45 PM CDTTornado WatchSPCAlfalfa, Blaine, Canadian, Craig, Creek, Custer and 22 more6 hr
May 30, 11:50 AM CDTMesoscale DiscussionSPCAnderson, Campbell, Claiborne, Cumberland, Fentress, Grainger and 13 more115 min
May 30, 4:35 PM CDTTornado WatchSPCCarter, Cocke, Greene, Hawkins, Johnson, Sullivan and 2 more5 hr
May 30, 7:24 AM CDTMesoscale DiscussionSPCBosque, Brown, Burnet, Coleman, Comanche, Coryell and 13 more96 min

Nearby

Mesoscale Discussions in Arkansas, 2004Mesoscale Discussions in Missouri, 2004Mesoscale Discussions in Oklahoma, 2004Every mesoscale discussion in 2004

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.