Alert archive / Texas / Mesoscale Discussions in 2019

Mesoscale Discussion 428

April 23, 201929 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 23, 2019, 8:35 PM CDT for 29 counties in Texas. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
Apr 23, 2019, 8:35 PM CDT (01:35 UTC)
Expired
Apr 23, 2019, 9:30 PM CDT
In force
55 min
Issued by
the Storm Prediction Center
All 29 counties

Brown County, TX, Callahan County, TX, Coke County, TX, Coleman County, TX, Comanche County, TX, Crane County, TX, Dallas County, TX, Eastland County, TX, Ector County, TX, Erath County, TX, Glasscock County, TX, Hood County, TX, Howard County, TX, Irion County, TX, Johnson County, TX, Midland County, TX, Mitchell County, TX, Nolan County, TX, Palo Pinto County, TX, Parker County, TX, Reagan County, TX, Runnels County, TX, Somervell County, TX, Stephens County, TX, Sterling County, TX, Tarrant County, TX, Taylor County, TX, Tom Green County, TX, Upton County, TX

The radar

The Dyess AFB radar (KDYX), 56 km from the middle of the area, began a volume at 01:33 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

Midland Regional, TX (KMAF), launched 00:00Z, 1.6 hours before the alert went out and 235 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, Midland Regional, TX at 00:00Z on 2019-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 570 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Midland Regional, TX at 00:00Z on 2019-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 square meters per square second.19395878Sfc1 km3 km6 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
570 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
1113 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
106 m²/s²
Significant tornado parameter
0.2
Supercell composite
1.5

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 23, 7:58 PM CDTMesoscale DiscussionSPCBrewster, Culberson, Jeff Davis, Loving, Presidio, Reeves and 2 more47 min
Apr 23, 10:06 PM CDTMesoscale DiscussionSPCBandera, Blanco, Bosque, Brewster, Brown, Burnet and 49 more54 min
Apr 23, 10:42 PM CDTSevere Thunderstorm WatchSPCBosque, Brewster, Brown, Coleman, Collin, Comanche and 32 more6 hr
Apr 23, 11:50 PM CDTMesoscale DiscussionSPCIrion, Reagan, Tom Green85 min
Apr 24, 2:16 AM CDTMesoscale DiscussionSPCBosque, Brewster, Brown, Callahan, Coke, Coleman and 27 more89 min
Apr 24, 10:11 AM CDTMesoscale DiscussionSPCAtascosa, Austin, Bandera, Bastrop, Bee, Bell and 60 more2 hr
Apr 24, 11:51 AM CDTSevere Thunderstorm WatchSPCAtascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 25 more7 hr
Apr 24, 2:31 PM CDTMesoscale DiscussionSPCAtascosa, Austin, Bandera, Bastrop, Bee, Bell and 39 more89 min
Apr 24, 3:47 PM CDTMesoscale DiscussionSPCAnderson, Angelina, Bastrop, Brazos, Burleson, Cherokee and 19 more43 min
Apr 24, 4:49 PM CDTSevere Thunderstorm WatchSPCAustin, Brazos, Burleson, Colorado, Grimes, Houston and 10 more5 hr
Apr 24, 5:23 PM CDTMesoscale DiscussionSPCAransas, Bee, Calhoun, Duval, Goliad, Jackson and 9 more67 min

Nearby

Mesoscale Discussions in Texas, 2019Every mesoscale discussion in 2019

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.