Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 987

May 30, 200419 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 30, 2004, 7:24 AM CDT for 19 counties in Texas. It was in force for 96 min.

The area

The outline as issued.

The facts

Issued
May 30, 2004, 7:24 AM CDT (12:24 UTC)
Expired
May 30, 2004, 9:00 AM CDT
In force
96 min
Issued by
the Storm Prediction Center

Counties Bosque County, TX, Brown County, TX, Burnet County, TX, Coleman County, TX, Comanche County, TX, Coryell County, TX, Erath County, TX, Hamilton County, TX, Hill County, TX, Hood County, TX, Johnson County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, McLennan County, TX, Mills County, TX, San Saba County, TX, Somervell County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 0.4 hours before the alert went out and 171 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 2004-05-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2245 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 2004-05-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 307 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
2245 J/kg
Mixed-layer CIN
-160 J/kg
Mixed-layer LCL
738 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
307 m²/s²
0-3 km storm-relative helicity
315 m²/s²
Significant tornado parameter
1.2
Supercell composite
12.4

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 30, 12:15 PM CDTMesoscale DiscussionSPCBowie, Fannin, Lamar, Red River90 min
May 30, 12:35 PM CDTTornado WatchSPCBowie, Camp, Cass, Collin, Dallas, Delta and 13 more6 hr
May 30, 2:44 PM CDTMesoscale DiscussionSPCBowie, Lamar, Red River2 hr
May 30, 5:53 PM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Delta, Ellis, Franklin and 20 more97 min
May 30, 6:10 PM CDTTornado WatchSPCAnderson, Bowie, Camp, Cass, Cherokee, Delta and 25 more5 hr

Nearby

Mesoscale Discussions in Texas, 2004Every mesoscale discussion in 2004

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.