Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 707

May 3, 20038 counties in Oklahoma; 39 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 3, 2003, 1:42 PM CDT for 8 counties in Oklahoma; 39 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
May 3, 2003, 1:42 PM CDT (18:42 UTC)
Expired
May 3, 2003, 4:15 PM CDT
In force
3 hr
Issued by
the Storm Prediction Center
All 47 counties

Beaver County, OK, Beckham County, OK, Greer County, OK, Harmon County, OK, Jackson County, OK, Roger Mills County, OK, Texas County, OK, Tillman County, OK, Archer County, TX, Armstrong County, TX, Baylor County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Clay County, TX, Collingsworth County, TX, Cottle County, TX, Dickens County, TX, Donley County, TX, Fisher County, TX, Foard County, TX, Gray County, TX, Hall County, TX, Hansford County, TX, Hardeman County, TX, Haskell County, TX, Hemphill County, TX, Hutchinson County, TX, Jack County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Lipscomb County, TX, Motley County, TX, Ochiltree County, TX, Palo Pinto County, TX, Roberts County, TX, Shackelford County, TX, Sherman County, TX, Stephens County, TX, Stonewall County, TX, Throckmorton County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX, Young County, TX

The radar

The Altus AFB radar (KFDR), 87 km from the middle of the area, began a volume at 18:47 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

Amarillo Airport, TX (KAMA), launched 12:00Z, 6.7 hours before the alert went out and 185 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, Amarillo Airport, TX at 12:00Z on 2003-05-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 228 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, Amarillo Airport, TX at 12:00Z on 2003-05-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 221 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
228 J/kg
Mixed-layer CIN
-274 J/kg
Mixed-layer LCL
785 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
221 m²/s²
0-3 km storm-relative helicity
238 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.5

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 DiscussionSPCChoctaw, McCurtain2 hr
May 2, 9:50 PM CDTSevere Thunderstorm WatchSPCMcCurtain5 hr
May 2, 11:42 PM CDTMesoscale DiscussionSPCMcCurtain93 min
May 3, 12:29 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Choctaw, Coal, Johnston, McCurtain and 2 more3 hr
May 3, 1:40 PM CDTTornado WatchSPCAtoka, Bryan, Carter, Choctaw, Coal, Garvin and 8 more6 hr
May 3, 3:42 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Garvin and 8 more2 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 3, 6:49 PM CDTMesoscale DiscussionSPCAtoka, Bryan, Carter, Choctaw, Coal, Garvin and 8 more56 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 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.