Alert archive / Texas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 7, NWS Corpus Christi, TX

May 11, 2021La Salle County, McMullen County, Texas

NWS Corpus Christi, TX issued this severe thunderstorm warning at May 11, 2021, 4:23 PM CDT for La Salle 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, 4:23 PM CDT (21:23 UTC)
Expired: May 11, 2021, 5:15 PM CDT
In force: 52 min
Issued by: NWS Corpus Christi, TX
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties La Salle County, TX, McMullen County, TX

The radar

The Austin/San Antonio radar (KEWX), 142 km from the middle of the area, began a volume at 21:26 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.

Issued	Product	Office	Lasted
May 11, 3:41 PM CDT	Severe Thunderstorm Watch	SPC	10 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 9.4 hours before the alert went out and 160 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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.

134 
WUUS54 KCRP 112123
SVRCRP
TXC283-311-112215-
/O.NEW.KCRP.SV.W.0007.210511T2123Z-210511T2215Z/

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

The National Weather Service in Corpus Christi has issued a

* Severe Thunderstorm Warning for...
  Northeastern La Salle County in south central Texas...
  Northwestern McMullen County in south central Texas...

* Until 515 PM CDT.

* At 423 PM CDT, a severe thunderstorm was located over Zella, or 15
  miles west of Tilden, moving east at 25 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* This severe thunderstorm will be near...
  Cross around 500 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2853 9848 2842 9884 2860 9890 2864 9880
      2864 9853
TIME...MOT...LOC 2123Z 254DEG 21KT 2854 9879 

HAIL...1.00IN
WIND...<50MPH
 
$$

JCP

3 follow-up statements

767 
WWUS54 KCRP 112133
SVSCRP

Severe Weather Statement
National Weather Service Corpus Christi TX
433 PM CDT Tue May 11 2021

TXC283-311-112215-
/O.CON.KCRP.SV.W.0007.000000T0000Z-210511T2215Z/
La Salle TX-McMullen TX-
433 PM CDT Tue May 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTHEASTERN LA SALLE AND NORTHWESTERN MCMULLEN COUNTIES...

At 433 PM CDT, a severe thunderstorm was located near Zella, or 12
miles northwest of Tilden, moving east at 25 mph.

HAZARD...Quarter size hail.

SOURCE...Radar indicated.

IMPACT...Damage to vehicles is expected.

This severe storm will be near...
  Cross around 500 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2853 9848 2842 9884 2860 9890 2864 9880
      2864 9853
TIME...MOT...LOC 2133Z 254DEG 21KT 2856 9873 

HAIL...1.00IN
WIND...<50MPH
 
$$

JCP

787 
WWUS54 KCRP 112141
SVSCRP

Severe Weather Statement
National Weather Service Corpus Christi TX
441 PM CDT Tue May 11 2021

TXC283-311-112215-
/O.CON.KCRP.SV.W.0007.000000T0000Z-210511T2215Z/
La Salle TX-McMullen TX-
441 PM CDT Tue May 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTHEASTERN LA SALLE AND NORTHWESTERN MCMULLEN COUNTIES...

At 440 PM CDT, a severe thunderstorm was located near Zella, or 11
miles northwest of Tilden, moving east at 25 mph.

HAZARD...Ping pong ball size hail.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

This severe storm will be near...
  Cross around 500 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

&&

LAT...LON 2853 9848 2848 9866 2845 9884 2860 9890
      2864 9880 2864 9853
TIME...MOT...LOC 2140Z 254DEG 21KT 2857 9868 

HAIL...1.50IN
WIND...<50MPH
 
$$

JCP

413 
WWUS54 KCRP 112153
SVSCRP

Severe Weather Statement
National Weather Service Corpus Christi TX
453 PM CDT Tue May 11 2021

TXC283-311-112215-
/O.CON.KCRP.SV.W.0007.000000T0000Z-210511T2215Z/
La Salle TX-McMullen TX-
453 PM CDT Tue May 11 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 515 PM CDT
FOR NORTHEASTERN LA SALLE AND NORTHWESTERN MCMULLEN COUNTIES...

At 453 PM CDT, a severe thunderstorm was located over Cross, or 9
miles north of Tilden, moving east at 25 mph.

HAZARD...Two inch hail.

SOURCE...Radar indicated.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles.

This severe storm will be near...
  Cross around 500 PM CDT.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

This storm is producing large hail. SEEK SHELTER NOW inside a sturdy
structure and stay away from windows.

&&

LAT...LON 2853 9848 2848 9866 2845 9882 2852 9885
      2856 9881 2864 9880 2864 9853
TIME...MOT...LOC 2153Z 254DEG 21KT 2859 9859 

HAIL...2.00IN
WIND...<50MPH
 
$$

JCP

The office that day

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

Issued	Product	Office	Counties	Lasted
May 10, 8:58 PM CDT	Special Weather Statement	CRP	La Salle	32 min
May 10, 9:35 PM CDT	Special Weather Statement	CRP	La Salle	40 min
May 10, 10:15 PM CDT	Special Weather Statement	CRP	McMullen	45 min
May 11, 12:35 AM CDT	Special Weather Statement	CRP	San Patricio	40 min
May 11, 1:09 AM CDT	Special Weather Statement	CRP	San Patricio	51 min
May 11, 1:34 AM CDT	Areal Flood Advisory	CRP	Bee, Refugio, San Patricio	3 hr
May 11, 1:43 AM CDT	Special Weather Statement	CRP	San Patricio	47 min
May 11, 2:03 AM CDT	Special Weather Statement	CRP	San Patricio	42 min
May 11, 2:45 AM CDT	Special Weather Statement	CRP	San Patricio	45 min
May 11, 3:09 PM CDT	Special Weather Statement	CRP	La Salle	36 min
May 11, 3:46 PM CDT	Special Weather Statement	CRP	La Salle	29 min
May 11, 4:38 PM CDT	Areal Flood Advisory	CRP	La Salle, McMullen	3 hr
May 11, 5:03 PM CDT	Severe Thunderstorm Warning	CRP	McMullen	42 min
May 11, 5:20 PM CDT	Tornado Warning	CRP	Live Oak, McMullen	40 min
May 11, 5:38 PM CDT	Severe Thunderstorm Warning	CRP	Live Oak, McMullen	52 min
May 11, 6:18 PM CDT	Tornado Warning	CRP	Duval, Live Oak, McMullen	42 min
May 11, 6:21 PM CDT	Severe Thunderstorm Warning	CRP	Duval, Jim Wells, Live Oak, McMullen	39 min
May 11, 6:29 PM CDT	Special Weather Statement	CRP	La Salle	31 min
May 11, 6:35 PM CDT	Severe Thunderstorm Warning	CRP	La Salle, McMullen, Webb	40 min
May 11, 6:48 PM CDT	Areal Flood Advisory	CRP	Duval, La Salle, McMullen, Webb	3 hr
May 11, 6:52 PM CDT	Severe Thunderstorm Warning	CRP	Duval, McMullen	38 min

Nearby

Severe Thunderstorm Warnings in Texas, 2021 Every 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.