Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 630

April 29, 200323 counties in Oklahoma; 50 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 29, 2003, 9:05 PM CDT for 23 counties in Oklahoma; 50 counties in Texas. It was in force for 85 min.

The area

The outline as issued.

The facts

Issued
Apr 29, 2003, 9:05 PM CDT (02:05 UTC)
Expired
Apr 29, 2003, 10:30 PM CDT
In force
85 min
Issued by
the Storm Prediction Center
All 73 counties

Alfalfa County, OK, Beckham County, OK, Blaine County, OK, Caddo County, OK, Canadian County, OK, Comanche County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Garfield County, OK, Grant County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Kingfisher County, OK, Kiowa County, OK, Major County, OK, Roger Mills County, OK, Tillman County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Archer County, TX, Baylor County, TX, Borden County, TX, Callahan County, TX, Childress County, TX, Coke County, TX, Coleman County, TX, Collingsworth County, TX, Concho County, TX, Cottle County, TX, Crockett County, TX, Crosby County, TX, Dickens County, TX, Donley County, TX, Edwards County, TX, Fisher County, TX, Foard County, TX, Garza County, TX, Glasscock County, TX, Hall County, TX, Hardeman County, TX, Haskell County, TX, Hemphill County, TX, Howard County, TX, Irion County, TX, Jones County, TX, Kent County, TX, Kimble County, TX, King County, TX, Knox County, TX, Lipscomb County, TX, Menard County, TX, Mitchell County, TX, Motley County, TX, Nolan County, TX, Reagan County, TX, Runnels County, TX, Schleicher County, TX, Scurry County, TX, Shackelford County, TX, Sterling County, TX, Stonewall County, TX, Sutton County, TX, Taylor County, TX, Terrell County, TX, Throckmorton County, TX, Tom Green County, TX, Wheeler County, TX, Wichita County, TX, Wilbarger County, TX

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Midland Regional, TX (KMAF), launched 00:00Z, 2.1 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, Midland Regional, TX at 00:00Z on 2003-04-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, Midland Regional, TX at 00:00Z on 2003-04-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
4417 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
0 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Apr 29, 9:20 PM CDTSevere Thunderstorm WatchSPCLove3 hr
Apr 29, 11:16 PM CDTMesoscale DiscussionSPCMarshall119 min
Apr 30, 4:02 PM CDTMesoscale DiscussionSPCBeckham, Caddo, Comanche, Custer, Greer, Harmon and 5 more118 min
Apr 30, 6:05 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Blaine, Caddo, Canadian, Comanche, Cotton and 14 more5 hr
Apr 29, 8:19 PM CDTMesoscale DiscussionSPCBrooks, Cameron, Duval, Hidalgo, Jim Hogg, Jim Wells and 6 more86 min
Apr 30, 2:13 PM CDTMesoscale DiscussionSPCBrown, Coleman, Concho, Edwards, Kimble, McCulloch and 4 more92 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.