Alert archive / Texas / Mesoscale Discussions in 2011

Mesoscale Discussion 592

April 26, 201128 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 26, 2011, 3:01 PM CDT for 28 counties in Texas. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued
Apr 26, 2011, 3:01 PM CDT (20:01 UTC)
Expired
Apr 26, 2011, 4:30 PM CDT
In force
89 min
Issued by
the Storm Prediction Center
All 28 counties

Atascosa County, TX, Austin County, TX, Bastrop County, TX, Bee County, TX, Bexar County, TX, Blanco County, TX, Brazos County, TX, Burleson County, TX, Caldwell County, TX, Colorado County, TX, Comal County, TX, DeWitt County, TX, Fayette County, TX, Gonzales County, TX, Grimes County, TX, Guadalupe County, TX, Hays County, TX, Houston County, TX, Karnes County, TX, Kendall County, TX, Lavaca County, TX, Lee County, TX, Madison County, TX, Travis County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wilson County, TX

The radar

The Ft Hood radar (KGRK), 71 km from the middle of the area, began a volume at 20:01 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 watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 8.0 hours before the alert went out and 273 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, Corpus Christi, TX at 12:00Z on 2011-04-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2454 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, Corpus Christi, TX at 12:00Z on 2011-04-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 94 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
2454 J/kg
Mixed-layer CIN
-278 J/kg
Mixed-layer LCL
732 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
94 m²/s²
0-3 km storm-relative helicity
47 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.0

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
Apr 25, 7:34 PM CDTMesoscale DiscussionSPCCamp, Cass, Marion, Morris116 min
Apr 25, 9:37 PM CDTMesoscale DiscussionSPCAnderson, Angelina, Cherokee, Ellis, Freestone, Gregg and 26 more83 min
Apr 25, 10:47 PM CDTTornado WatchSPCHardin, Jasper, Newton, Tyler5 hr
Apr 26, 1:34 AM CDTMesoscale DiscussionSPCHardin, Jasper, Newton, San Jacinto, Tyler86 min
Apr 26, 1:52 AM CDTSevere Thunderstorm WatchSPCChambers, Hardin, Harris, Jasper, Jefferson, Liberty and 4 more5 hr
Apr 26, 1:11 PM CDTMesoscale DiscussionSPCAnderson, Angelina, Bosque, Bowie, Brazos, Camp and 43 more2 hr
Apr 26, 1:44 PM CDTTornado Watch PDSSPCAnderson, Bell, Bosque, Bowie, Camp, Cass and 46 more10 hr
Apr 26, 3:15 PM CDTMesoscale DiscussionSPCArcher, Baylor, Childress, Clay, Collingsworth, Cottle and 16 more90 min
Apr 26, 3:43 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Clay, Foard, Hardeman, Knox and 2 more6 hr
Apr 26, 3:59 PM CDTMesoscale DiscussionSPCAnderson, Bosque, Bowie, Camp, Cass, Cherokee and 38 more91 min
Apr 26, 4:56 PM CDTTornado WatchSPCAngelina, Austin, Bastrop, Brazos, Burleson, Fayette and 23 more5 hr
Apr 26, 6:43 PM CDTMesoscale DiscussionSPCAnderson, Angelina, Austin, Bastrop, Bell, Bowie and 64 more2 hr

Nearby

Mesoscale Discussions in Texas, 2011Every mesoscale discussion in 2011

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.