Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 547

April 23, 2003Cotton County, Tillman County, Oklahoma; 19 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2003, 5:36 PM CDT for Cotton County, Tillman County, Oklahoma; 19 counties in Texas. It was in force for 54 min.

The area

The outline as issued.

The facts

Issued
Apr 23, 2003, 5:36 PM CDT (22:36 UTC)
Expired
Apr 23, 2003, 6:30 PM CDT
In force
54 min
Issued by
the Storm Prediction Center
All 21 counties

Cotton County, OK, Tillman County, OK, Archer County, TX, Baylor County, TX, Brown County, TX, Callahan County, TX, Clay County, TX, Coleman County, TX, Concho County, TX, Eastland County, TX, Jones County, TX, McCulloch County, TX, Runnels County, TX, Shackelford County, TX, Stephens County, TX, Taylor County, TX, Throckmorton County, TX, Tom Green County, TX, Wichita County, TX, Wilbarger County, TX, Young 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

Fort Worth, TX (KFWD), launched 12:00Z, 10.6 hours before the alert went out and 227 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, Fort Worth, TX at 12:00Z on 2003-04-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 245 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, Fort Worth, TX at 12:00Z on 2003-04-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 71 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
245 J/kg
Mixed-layer CIN
-295 J/kg
Mixed-layer LCL
486 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
71 m²/s²
0-3 km storm-relative helicity
105 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
Apr 23, 2:58 AM CDTMesoscale DiscussionSPCHarmon2 hr
Apr 23, 9:55 AM CDTMesoscale DiscussionSPCAlfalfa, Blaine, Caddo, Canadian, Cleveland, Creek and 17 more65 min
Apr 23, 10:30 AM CDTMesoscale DiscussionSPCBeckham, Custer, Dewey, Ellis, Greer, Harmon and 4 more90 min
Apr 23, 11:50 AM CDTTornado WatchSPCComanche, Cotton, Harmon, Jackson, Tillman6 hr
Apr 23, 1:20 PM CDTSevere Thunderstorm WatchSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 15 more6 hr
Apr 23, 1:26 PM CDTMesoscale DiscussionSPCComanche, Cotton, Harmon, Jackson, Tillman94 min
Apr 23, 2:44 PM CDTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Custer and 15 more91 min
Apr 23, 3:08 PM CDTMesoscale DiscussionSPCCarter, Comanche, Cotton, Garvin, Jackson, Jefferson and 5 more97 min
Apr 23, 4:00 PM CDTTornado WatchSPCAtoka, Bryan, Carter, Jefferson, Johnston, Love and 3 more6 hr
Apr 23, 5:47 PM CDTMesoscale DiscussionSPCAlfalfa, Beckham, Blaine, Caddo, Canadian, Comanche and 16 more88 min
Apr 23, 6:00 PM CDTTornado WatchSPCComanche, Cotton, Stephens, Tillman4 hr
Apr 22, 7:32 PM CDTMesoscale DiscussionSPCGaines, Martin88 min
Apr 23, 12:04 AM CDTMesoscale DiscussionSPCAndrews, Armstrong, Bailey, Borden, Briscoe, Carson and 27 more116 min
Apr 23, 1:05 AM CDTSevere Thunderstorm WatchSPCBailey, Castro, Cochran, Dallam, Deaf Smith, Hartley and 10 more6 hr
Apr 23, 3:59 AM CDTMesoscale DiscussionSPCBailey, Castro, Cochran, Deaf Smith, Hale, Hartley and 13 more2 hr
Apr 23, 2:12 PM CDTMesoscale DiscussionSPCBandera, Crockett, Edwards, Kerr, Kimble, Kinney and 7 more93 min
Apr 23, 2:35 PM CDTSevere Thunderstorm WatchSPCCrockett, Edwards, Kimble, Kinney, Mason, Menard and 4 more5 hr
Apr 23, 4:02 PM CDTMesoscale DiscussionSPCCrockett, Edwards, Kimble, Kinney, Mason, Menard and 5 more88 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.