Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 828

May 7, 200322 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 7, 2003, 5:38 PM CDT for 22 counties in Texas. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued
May 7, 2003, 5:38 PM CDT (22:38 UTC)
Expired
May 7, 2003, 7:15 PM CDT
In force
97 min
Issued by
the Storm Prediction Center
All 22 counties

Archer County, TX, Baylor County, TX, Callahan County, TX, Clay County, TX, Eastland County, TX, Fisher County, TX, Garza County, TX, Haskell County, TX, Jones County, TX, Kent County, TX, King County, TX, Knox County, TX, Mitchell County, TX, Nolan County, TX, Palo Pinto County, TX, Scurry County, TX, Shackelford County, TX, Stephens County, TX, Stonewall County, TX, Taylor County, TX, Throckmorton County, TX, Young County, TX

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 10.6 hours before the alert went out and 234 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 12:00Z on 2003-05-07Temperature 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 12:00Z on 2003-05-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 72 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
4359 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
72 m²/s²
0-3 km storm-relative helicity
138 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
May 6, 7:48 PM CDTMesoscale DiscussionSPCCollin, Cooke, Dallas, Denton, Erath, Fannin and 12 more117 min
May 6, 11:08 PM CDTMesoscale DiscussionSPCBowie, Cass97 min
May 6, 11:30 PM CDTTornado WatchSPCBowie, Camp, Cass, Delta, Franklin, Gregg and 16 more6 hr
May 7, 2:27 AM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Delta, Franklin, Gregg and 16 more3 hr
May 7, 2:17 PM CDTMesoscale DiscussionSPCBorden, Coke, Concho, Dawson, Fisher, Garza and 19 more103 min
May 7, 5:00 PM CDTTornado WatchSPCArcher, Armstrong, Baylor, Briscoe, Callahan, Carson and 33 more6 hr

Nearby

Mesoscale Discussions in Texas, 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.