Alert archive / Texas / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 308, NWS Austin/San Antonio, TX

September 15, 2023Val Verde County, Texas

NWS Austin/San Antonio, TX issued this severe thunderstorm warning at Sep 15, 2023, 8:58 PM CDT for Val Verde County, Texas. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Sep 15, 2023, 8:58 PM CDT (01:58 UTC)
Expired
Sep 15, 2023, 9:31 PM CDT
In force
33 min
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon
Hail
1.0 in
Wind
60.0 mph

County Val Verde County, TX

The radar

The Laughlin AFB radar (KDFX), 109 km from the middle of the area, began a volume at 01:58 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

Midland Regional, TX (KMAF), launched 00:00Z, 2.0 hours before the alert went out and 250 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 2023-09-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1339 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, Midland Regional, TX at 00:00Z on 2023-09-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 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
1339 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
1473 m above ground
0-6 km bulk shear
41 kt
0-1 km storm-relative helicity
-6 m²/s²
0-3 km storm-relative helicity
120 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.1

Open this sounding in Storm Lab

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 15, 8:35 PM CDTSpecial Weather StatementEWXVal Verde55 min
Sep 15, 9:33 PM CDTSpecial Weather StatementEWXVal Verde57 min
Sep 15, 10:49 PM CDTSpecial Weather StatementEWXFrio26 min
Sep 15, 11:56 PM CDTSpecial Weather StatementEWXUvalde34 min
Sep 16, 12:26 AM CDTSpecial Weather StatementEWXReal34 min
Sep 16, 12:37 AM CDTSpecial Weather StatementEWXUvalde23 min
Sep 16, 1:19 AM CDTSevere Thunderstorm WarningEWXUvalde23 min
Sep 16, 1:41 AM CDTSpecial Weather StatementEWXUvalde34 min
Sep 16, 9:40 AM CDTSpecial Weather StatementEWXBurnet, Llano50 min
Sep 16, 10:25 AM CDTSpecial Weather StatementEWXBurnet50 min
Sep 16, 10:31 AM CDTSpecial Weather StatementEWXBlanco, Llano44 min
Sep 16, 10:53 AM CDTSevere Thunderstorm WarningEWXBurnet, Williamson52 min
Sep 16, 11:17 AM CDTSpecial Weather StatementEWXBlanco43 min
Sep 16, 11:29 AM CDTSpecial Weather StatementEWXWilliamson31 min
Sep 16, 12:42 PM CDTSpecial Weather StatementEWXBastrop, Caldwell, Lee48 min
Sep 16, 1:01 PM CDTSpecial Weather StatementEWXGuadalupe44 min
Sep 16, 1:29 PM CDTSpecial Weather StatementEWXFayette, Lee46 min

Nearby

Severe Thunderstorm Warnings in Texas, 2023Every severe thunderstorm warning in 2023

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.