Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 9, NWS Corpus Christi, TX

May 11, 2021Live Oak County, McMullen County, Texas

NWS Corpus Christi, TX issued this severe thunderstorm warning at May 11, 2021, 5:38 PM CDT for Live Oak County, McMullen County, Texas. It was in force for 52 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 11, 2021, 5:38 PM CDT (22:38 UTC)
Expired
May 11, 2021, 6:30 PM CDT
In force
52 min
Issued by
NWS Corpus Christi, TX
Area
Storm-based polygon
Tornado
Possible
Hail
1.25 in
Wind
60.0 mph

Counties Live Oak County, TX, McMullen County, TX

The radar

The Corpus Christi radar (KCRP), 110 km from the middle of the area, began a volume at 22:41 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
May 11, 3:41 PM CDTSevere Thunderstorm WatchSPC10 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 10.6 hours before the alert went out and 127 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 2021-05-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1953 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 2021-05-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -52 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
1953 J/kg
Mixed-layer CIN
-175 J/kg
Mixed-layer LCL
825 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-52 m²/s²
0-3 km storm-relative helicity
33 m²/s²
Significant tornado parameter
0.0
Supercell composite
-2.5

Open this sounding in Storm Lab

The text

As transmitted.

079 
WUUS54 KCRP 112238
SVRCRP
TXC297-311-112330-
/O.NEW.KCRP.SV.W.0009.210511T2238Z-210511T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Corpus Christi TX
538 PM CDT Tue May 11 2021

The National Weather Service in Corpus Christi has issued a

* Severe Thunderstorm Warning for...
  East central McMullen County in south central Texas...
  West central Live Oak County in south central Texas...

* Until 630 PM CDT.

* At 538 PM CDT, a severe thunderstorm was located near Tilden,
  moving southeast at 20 mph.

  HAZARD...60 mph wind gusts and half dollar size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* This severe thunderstorm will remain over mainly rural areas of
  east central McMullen and west central Live Oak Counties.

This includes US Highway 59 between mile markers 740 and 742.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

Remain alert for a possible tornado! Tornadoes can develop quickly
from severe thunderstorms. If you spot a tornado go at once into the
basement or small central room in a sturdy structure.

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 2836 9862 2851 9849 2833 9815 2809 9833
TIME...MOT...LOC 2238Z 309DEG 17KT 2838 9849 

TORNADO...POSSIBLE
HAIL...1.25IN
WIND...60MPH
 
$$

JCP

The office that day

Everything else NWS Corpus Christi, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 10, 8:58 PM CDTSpecial Weather StatementCRPLa Salle32 min
May 10, 9:35 PM CDTSpecial Weather StatementCRPLa Salle40 min
May 10, 10:15 PM CDTSpecial Weather StatementCRPMcMullen45 min
May 11, 12:35 AM CDTSpecial Weather StatementCRPSan Patricio40 min
May 11, 1:09 AM CDTSpecial Weather StatementCRPSan Patricio51 min
May 11, 1:34 AM CDTAreal Flood AdvisoryCRPBee, Refugio, San Patricio3 hr
May 11, 1:43 AM CDTSpecial Weather StatementCRPSan Patricio47 min
May 11, 2:03 AM CDTSpecial Weather StatementCRPSan Patricio42 min
May 11, 2:45 AM CDTSpecial Weather StatementCRPSan Patricio45 min
May 11, 3:09 PM CDTSpecial Weather StatementCRPLa Salle36 min
May 11, 3:46 PM CDTSpecial Weather StatementCRPLa Salle29 min
May 11, 4:23 PM CDTSevere Thunderstorm WarningCRPLa Salle, McMullen52 min
May 11, 4:38 PM CDTAreal Flood AdvisoryCRPLa Salle, McMullen3 hr
May 11, 5:03 PM CDTSevere Thunderstorm WarningCRPMcMullen42 min
May 11, 5:20 PM CDTTornado WarningCRPLive Oak, McMullen40 min
May 11, 6:18 PM CDTTornado WarningCRPDuval, Live Oak, McMullen42 min
May 11, 6:21 PM CDTSevere Thunderstorm WarningCRPDuval, Jim Wells, Live Oak, McMullen39 min
May 11, 6:29 PM CDTSpecial Weather StatementCRPLa Salle31 min
May 11, 6:35 PM CDTSevere Thunderstorm WarningCRPLa Salle, McMullen, Webb40 min
May 11, 6:48 PM CDTAreal Flood AdvisoryCRPDuval, La Salle, McMullen, Webb3 hr
May 11, 6:52 PM CDTSevere Thunderstorm WarningCRPDuval, McMullen38 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021Every severe thunderstorm warning in 2021

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.