Alert archive / Texas / Mesoscale Discussions in 2024

Mesoscale Discussion 402

April 9, 202417 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Apr 9, 2024, 6:40 PM CDT for 17 counties in Texas. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued
Apr 9, 2024, 6:40 PM CDT (23:40 UTC)
Expired
Apr 9, 2024, 8:15 PM CDT
In force
95 min
Issued by
the Storm Prediction Center
Concerning
Severe thunderstorm watch 95

Counties Bastrop County, TX, Bell County, TX, Blanco County, TX, Burnet County, TX, Caldwell County, TX, Comal County, TX, Gillespie County, TX, Hays County, TX, Kendall County, TX, Kerr County, TX, Lampasas County, TX, Lee County, TX, Llano County, TX, Mason County, TX, Milam County, TX, Travis County, TX, Williamson County, TX

The radar

The Austin/San Antonio radar (KEWX), 78 km from the middle of the area, began a volume at 23:39 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

Del Rio, TX (KDRT), launched 12:00Z, 11.7 hours before the alert went out and 282 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 2024-04-09Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2828 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 2024-04-09The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 108 square meters per square second.1939587897Sfc1 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
2828 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
637 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
108 m²/s²
0-3 km storm-relative helicity
129 m²/s²
Significant tornado parameter
1.5
Supercell composite
7.1

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 8, 7:27 PM CDTMesoscale DiscussionSPCArcher, Baylor, Fisher, Haskell, Jones, Kent and 7 more93 min
Apr 8, 7:52 PM CDTTornado WatchSPCAnderson, Cherokee, Freestone, Gregg, Harrison, Henderson and 11 more5 hr
Apr 8, 9:02 PM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Collin, Cooke, Denton and 15 more88 min
Apr 8, 10:18 PM CDTSevere Thunderstorm WatchSPCArcher, Clay, Collin, Cooke, Dallas, Delta and 15 more6 hr
Apr 8, 10:59 PM CDTMesoscale DiscussionSPCAndrews, Borden, Crane, Dawson, Ector, Gaines and 10 more3 hr
Apr 8, 11:49 PM CDTMesoscale DiscussionSPCCollin, Cooke, Dallas, Denton, Jack, Palo Pinto and 7 more86 min
Apr 9, 2:57 AM CDTMesoscale DiscussionSPCCollin, Dallas, Delta, Ellis, Erath, Fannin and 12 more93 min
Apr 9, 5:30 AM CDTMesoscale DiscussionSPCAndrews, Borden, Coke, Crane, Dawson, Ector and 13 more2 hr
Apr 9, 7:47 AM CDTMesoscale DiscussionSPCArcher, Baylor, Callahan, Coke, Coleman, Eastland and 18 more118 min
Apr 9, 8:48 AM CDTMesoscale DiscussionSPCAngelina, Austin, Bastrop, Brazos, Burleson, Caldwell and 25 more117 min
Apr 9, 9:40 AM CDTTornado WatchSPCAnderson, Bastrop, Bell, Blanco, Brazos, Burleson and 21 more7 hr
Apr 9, 11:30 AM CDTMesoscale DiscussionSPCBrown, Callahan, Coke, Coleman, Concho, Eastland and 9 more3 hr
Apr 9, 12:12 PM CDTMesoscale DiscussionSPCAnderson, Bell, Burnet, Coryell, Falls, Freestone and 8 more93 min
Apr 9, 1:52 PM CDTMesoscale DiscussionSPCAnderson, Angelina, Cherokee, Houston, Leon, Nacogdoches and 5 more83 min
Apr 9, 2:24 PM CDTTornado WatchSPCAngelina, Cherokee, Gregg, Harrison, Nacogdoches, Panola and 5 more11 hr
Apr 9, 3:50 PM CDTMesoscale DiscussionSPCHarrison, Panola, San Augustine, Shelby85 min
Apr 9, 3:55 PM CDTMesoscale DiscussionSPCBastrop, Blanco, Burnet, Caldwell, Comal, Gillespie and 8 more95 min
Apr 9, 4:25 PM CDTSevere Thunderstorm WatchSPCBastrop, Bell, Blanco, Burnet, Coryell, Falls and 13 more7 hr
Apr 9, 5:17 PM CDTMesoscale DiscussionSPCSabine88 min

Nearby

Mesoscale Discussions in Texas, 2024Every mesoscale discussion in 2024

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.