Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 1002

May 30, 200419 counties in Arkansas; 4 counties in Oklahoma; 26 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 30, 2004, 5:53 PM CDT for 19 counties in Arkansas; 4 counties in Oklahoma; 26 counties in Texas. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
May 30, 2004, 5:53 PM CDT (22:53 UTC)
Expired
May 30, 2004, 7:30 PM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 49 counties

Conway County, AR, Crawford County, AR, Franklin County, AR, Garland County, AR, Hempstead County, AR, Howard County, AR, Johnson County, AR, Little River County, AR, Logan County, AR, Miller County, AR, Montgomery County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pope County, AR, Scott County, AR, Sebastian County, AR, Sevier County, AR, Yell County, AR, Choctaw County, OK, LeFlore County, OK, McCurtain County, OK, Pushmataha County, OK, Bowie County, TX, Camp County, TX, Cass County, TX, Delta County, TX, Ellis County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hill County, TX, Hopkins County, TX, Hunt County, TX, Kaufman County, TX, Lamar County, TX, Marion County, TX, Morris County, TX, Navarro County, TX, Rains County, TX, Red River County, TX, Rockwall County, TX, Rusk County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Shreveport radar (KSHV), 168 km from the middle of the area, began a volume at 22:53 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, 10.9 hours before the alert went out and 172 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 2004-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2146 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 2004-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 229 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
2146 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
631 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
229 m²/s²
0-3 km storm-relative helicity
376 m²/s²
Significant tornado parameter
2.2
Supercell composite
15.2

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, 2:44 PM CDTMesoscale DiscussionSPCBaxter, Boone, Carroll, Clark, Clay, Cleburne and 44 more2 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, 6:10 PM CDTTornado WatchSPCBaxter, Boone, Carroll, Clark, Cleburne, Conway and 30 more5 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 29, 11:23 PM CDTMesoscale DiscussionSPCCraig, Kay, Mayes, Noble, Nowata, Osage and 5 more67 min
May 30, 7:24 AM CDTMesoscale DiscussionSPCBosque, Brown, Burnet, Coleman, Comanche, Coryell and 13 more96 min

Nearby

Mesoscale Discussions in Texas, 2004Mesoscale Discussions in Arkansas, 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.