Alert archive / Arkansas / Mesoscale Discussions in 2003

Mesoscale Discussion 701

May 2, 200321 counties in Arkansas; McCurtain County, Oklahoma; 6 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 2, 2003, 11:42 PM CDT for 21 counties in Arkansas; McCurtain County, Oklahoma; 6 counties in Texas. It was in force for 93 min.

The area

The outline as issued.

The facts

Issued
May 2, 2003, 11:42 PM CDT (04:42 UTC)
Expired
May 3, 2003, 1:15 AM CDT
In force
93 min
Issued by
the Storm Prediction Center
All 28 counties

Bradley County, AR, Calhoun County, AR, Clark County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Lafayette County, AR, Little River County, AR, Miller County, AR, Montgomery County, AR, Nevada County, AR, Ouachita County, AR, Pike County, AR, Polk County, AR, Sevier County, AR, Union County, AR, McCurtain County, OK, Bowie County, TX, Cass County, TX, Franklin County, TX, Morris County, TX, Red River County, TX, Titus County, TX

The radar

The Shreveport radar (KSHV), 156 km from the middle of the area, began a volume at 04:44 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 nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 4.7 hours before the alert went out and 152 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 00:00Z on 2003-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1869 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 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 00:00Z on 2003-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 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
1869 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1427 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
30 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

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 2, 9:30 PM CDTMesoscale DiscussionSPCBradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 13 more2 hr
May 2, 9:50 PM CDTSevere Thunderstorm WatchSPCBradley, Calhoun, Clark, Cleveland, Columbia, Dallas and 15 more5 hr
May 3, 2:36 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleburne and 26 more24 min
May 3, 12:29 PM CDTMesoscale DiscussionSPCColumbia, Hempstead, Lafayette, Little River, Miller, Nevada and 2 more3 hr
May 3, 1:40 PM CDTTornado WatchSPCColumbia, Hempstead, Lafayette, Little River, Miller, Nevada and 1 more6 hr
May 3, 3:42 PM CDTMesoscale DiscussionSPCColumbia, Hempstead, Lafayette, Little River, Miller, Nevada and 1 more2 hr
May 3, 6:49 PM CDTMesoscale DiscussionSPCColumbia, Hempstead, Lafayette, Little River, Miller, Nevada and 1 more56 min
May 3, 1:42 PM CDTMesoscale DiscussionSPCBeaver, Beckham, Greer, Harmon, Jackson, Roger Mills and 2 more3 hr
May 3, 4:00 PM CDTTornado WatchSPCCaddo, Comanche, Cotton, Grady, Greer, Harmon and 5 more5 hr
May 3, 6:10 PM CDTMesoscale DiscussionSPCBeckham, Blaine, Caddo, Comanche, Cotton, Custer and 11 more65 min
May 2, 8:09 PM CDTMesoscale DiscussionSPCAnderson, Bell, Bosque, Burnet, Comanche, Coryell and 23 more96 min
May 2, 10:25 PM CDTMesoscale DiscussionSPCBosque, Brown, Callahan, Coleman, Comanche, Concho and 11 more95 min

Nearby

Mesoscale Discussions in Arkansas, 2003Mesoscale Discussions in Texas, 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.