Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 102

February 21, 200311 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Feb 21, 2003, 2:43 AM CST for 11 counties in Texas. It was in force for 3 hr.

The area

The outline as issued.

The facts

Issued
Feb 21, 2003, 2:43 AM CST (08:43 UTC)
Expired
Feb 21, 2003, 5:45 AM CST
In force
3 hr
Issued by
the Storm Prediction Center

Counties Dimmit County, TX, Edwards County, TX, Frio County, TX, Kinney County, TX, La Salle County, TX, Maverick County, TX, Real County, TX, Sutton County, TX, Uvalde County, TX, Val Verde County, TX, Zavala 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

Del Rio, TX (KDRT), launched 00:00Z, 8.7 hours before the alert went out and 50 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, Del Rio, TX at 00:00Z on 2003-02-21Temperature 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, Del Rio, TX at 00:00Z on 2003-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 square meters per square second.1939587897Sfc1 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
567 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
154 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
Feb 21, 1:43 AM CSTMesoscale DiscussionSPCChambers, Hardin, Jasper, Jefferson, Liberty, Newton and 1 more2 hr
Feb 21, 3:53 AM CSTMesoscale DiscussionSPCAransas, Austin, Brazoria, Calhoun, Colorado, Fort Bend and 13 more3 hr
Feb 21, 4:10 AM CSTSevere Thunderstorm WatchSPCAtascosa, Bandera, Bastrop, Bexar, Blanco, Brazos and 26 more6 hr
Feb 21, 4:25 AM CSTTornado WatchSPCAustin, Brazoria, Brazos, Burleson, Calhoun, Colorado and 15 more6 hr
Feb 21, 5:58 AM CSTMesoscale DiscussionSPCAtascosa, Bandera, Bastrop, Bexar, Blanco, Brazos and 26 more2 hr
Feb 21, 6:16 AM CSTMesoscale DiscussionSPCAustin, Brazoria, Brazos, Burleson, Calhoun, Colorado and 17 more119 min
Feb 21, 9:02 AM CSTMesoscale DiscussionSPCAngelina, Brazoria, Chambers, Cherokee, Fort Bend, Galveston and 22 more58 min
Feb 21, 9:40 AM CSTTornado WatchSPCAngelina, Austin, Brazoria, Brazos, Burleson, Chambers and 25 more6 hr
Feb 21, 11:47 AM CSTMesoscale DiscussionSPCAngelina, Brazoria, Chambers, Fort Bend, Galveston, Grimes and 18 more118 min
Feb 21, 1:30 PM CSTMesoscale DiscussionSPCHardin, Harris, Jasper, Liberty, Montgomery, Newton and 3 more2 hr
Feb 21, 3:32 PM CSTMesoscale DiscussionSPCHardin, Jasper, Liberty, Newton, Orange, Tyler118 min
Feb 21, 3:40 PM CSTTornado WatchSPCAngelina, Chambers, Hardin, Jasper, Jefferson, Nacogdoches and 5 more6 hr
Feb 21, 5:50 PM CSTMesoscale DiscussionSPCAngelina, Chambers, Hardin, Jasper, Jefferson, Nacogdoches and 5 more115 min

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.