Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 799

May 9, 200517 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 9, 2005, 5:59 PM CDT for 17 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
May 9, 2005, 5:59 PM CDT (22:59 UTC)
Expired
May 9, 2005, 8:00 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center

Counties Bell County, TX, Blanco County, TX, Bosque County, TX, Burnet County, TX, Coryell County, TX, Erath County, TX, Gillespie County, TX, Hamilton County, TX, Hood County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McLennan County, TX, Mills County, TX, Parker County, TX, San Saba County, TX, Somervell County, TX

The nearest sounding before it

Fort Worth, TX (KFWD), launched 12:00Z, 11.0 hours before the alert went out and 190 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 2005-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 136 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 2005-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 square meters per square second.19395878Sfc1 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
136 J/kg
Mixed-layer CIN
-570 J/kg
Mixed-layer LCL
1050 m above ground
0-6 km bulk shear
29 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
136 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

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 8, 9:10 PM CDTMesoscale DiscussionSPCBrooks, Jim Hogg, Kenedy, Kleberg, Zapata65 min
May 8, 9:29 PM CDTMesoscale DiscussionSPCBandera, Bastrop, Bexar, Caldwell, Comal, Guadalupe and 5 more61 min
May 9, 3:03 PM CDTMesoscale DiscussionSPCBlanco, Brown, Burnet, Coleman, Comanche, Eastland and 12 more117 min
May 9, 3:25 PM CDTSevere Thunderstorm WatchSPCBandera, Bell, Blanco, Bosque, Brown, Burnet and 22 more6 hr

Nearby

Mesoscale Discussions in Texas, 2005Every mesoscale discussion in 2005

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.