Alert archive / Texas / Mesoscale Discussions in 2005

Mesoscale Discussion 795

May 9, 200518 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 9, 2005, 3:03 PM CDT for 18 counties in Texas. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued
May 9, 2005, 3:03 PM CDT (20:03 UTC)
Expired
May 9, 2005, 5:00 PM CDT
In force
117 min
Issued by
the Storm Prediction Center

Counties Blanco County, TX, Brown County, TX, Burnet County, TX, Coleman County, TX, Comanche County, TX, Eastland County, TX, Erath County, TX, Gillespie County, TX, Hamilton County, TX, Kerr County, TX, Kimble County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McCulloch County, TX, Menard County, TX, Mills County, TX, San Saba 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 12:00Z, 8.1 hours before the alert went out and 255 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 12:00Z on 2005-05-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 722 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, Del Rio, TX at 12:00Z on 2005-05-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 114 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
722 J/kg
Mixed-layer CIN
-229 J/kg
Mixed-layer LCL
549 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
114 m²/s²
0-3 km storm-relative helicity
121 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
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, 3:25 PM CDTSevere Thunderstorm WatchSPCBandera, Bell, Blanco, Bosque, Brown, Burnet and 22 more6 hr
May 9, 5:59 PM CDTMesoscale DiscussionSPCBell, Blanco, Bosque, Burnet, Coryell, Erath and 11 more2 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.