Alert archive / Texas / Mesoscale Discussions in 2004

Mesoscale Discussion 2353

October 22, 200417 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Oct 22, 2004, 3:55 PM CDT for 17 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Oct 22, 2004, 3:55 PM CDT (20:55 UTC)
Expired
Oct 22, 2004, 6:00 PM CDT
In force
2 hr
Issued by
the Storm Prediction Center

Counties Bell County, TX, Bosque County, TX, Burnet County, TX, Coryell County, TX, Edwards County, TX, Gillespie County, TX, Hamilton County, TX, Hill County, TX, Kerr County, TX, Kimble County, TX, Lampasas County, TX, Llano County, TX, Mason County, TX, McLennan County, TX, Mills County, TX, San Saba County, TX, Sutton County, TX

The radar

The San Angelo radar (KSJT), 123 km from the middle of the area, began a volume at 20:59 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 8.9 hours before the alert went out and 214 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 2004-10-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1973 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 2004-10-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 122 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
1973 J/kg
Mixed-layer CIN
-9 J/kg
Mixed-layer LCL
528 m above ground
0-6 km bulk shear
51 kt
0-1 km storm-relative helicity
122 m²/s²
0-3 km storm-relative helicity
226 m²/s²
Significant tornado parameter
1.6
Supercell composite
6.9

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
Oct 22, 8:09 AM CDTMesoscale DiscussionSPCBaylor, Fisher, Foard, Haskell, Jones, Knox and 5 more2 hr
Oct 22, 1:08 PM CDTMesoscale DiscussionSPCCooke, Fannin, Grayson, Lamar2 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; radar from the NEXRAD Level II archive.