Alert archive / Texas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Corpus Christi, TX

April 25, 2018La Salle County, Webb County, Texas

NWS Corpus Christi, TX issued this severe thunderstorm warning at Apr 25, 2018, 5:39 PM CDT for La Salle County, Webb County, Texas. It was in force for 51 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 25, 2018, 5:39 PM CDT (22:39 UTC)
Expired: Apr 25, 2018, 6:30 PM CDT
In force: 51 min
Issued by: NWS Corpus Christi, TX
Area: Storm-based polygon
Hail: 1.25 in
Wind: 60.0 mph

Counties La Salle County, TX, Webb County, TX

The radar

The Laughlin AFB radar (KDFX), 164 km from the middle of the area, began a volume at 22:39 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.

What was reported inside it

Time	Report	Where	Remark
Apr 25, 5:56 PM CDT	HAIL 1	7 E Encinal, TX

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 10.7 hours before the alert went out and 196 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1744 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: -33 m²/s²
0-3 km storm-relative helicity: 1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

The text

As transmitted.

239 
WUUS54 KCRP 252239
SVRCRP
TXC283-479-252330-
/O.NEW.KCRP.SV.W.0021.180425T2239Z-180425T2330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Corpus Christi TX
539 PM CDT WED APR 25 2018

The National Weather Service in Corpus Christi has issued a

* Severe Thunderstorm Warning for...
  Northeastern Webb County in south central Texas...
  Southwestern La Salle County in south central Texas...

* Until 630 PM CDT.

* At 539 PM CDT, a severe thunderstorm was located near Encinal,
  moving east at 10 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.

* Locations impacted include...
  Encinal.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2802 9944 2819 9940 2828 9904 2787 9914
TIME...MOT...LOC 2239Z 281DEG 7KT 2810 9935 

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

GW

2 follow-up statements

596 
WWUS54 KCRP 252254
SVSCRP

Severe Weather Statement
National Weather Service Corpus Christi TX
554 PM CDT WED APR 25 2018

TXC283-479-252330-
/O.CON.KCRP.SV.W.0021.000000T0000Z-180425T2330Z/
Webb TX-La Salle TX-
554 PM CDT WED APR 25 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR NORTHEASTERN WEBB AND SOUTHWESTERN LA SALLE COUNTIES...

At 553 PM CDT, a severe thunderstorm was located near Encinal, moving
southeast at 20 mph.

HAZARD...Ping pong ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

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

Locations impacted include...
Encinal.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2802 9944 2819 9940 2828 9904 2787 9914
TIME...MOT...LOC 2253Z 306DEG 18KT 2803 9926 

HAIL...1.50IN
WIND...60MPH
 
$$

GW

707 
WWUS54 KCRP 252309
SVSCRP

Severe Weather Statement
National Weather Service Corpus Christi TX
609 PM CDT WED APR 25 2018

TXC283-252318-
/O.CAN.KCRP.SV.W.0021.000000T0000Z-180425T2330Z/
La Salle TX-
609 PM CDT WED APR 25 2018

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN LA SALLE COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has weakened.
Therefore, the warning has been cancelled. Small hail is still 
possible. 

LAT...LON 2802 9944 2804 9939 2803 9932 2805 9910
      2787 9914
TIME...MOT...LOC 2308Z 303DEG 13KT 2799 9920 

$$

TXC479-252330-
/O.CON.KCRP.SV.W.0021.000000T0000Z-180425T2330Z/
Webb TX-
609 PM CDT WED APR 25 2018

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 630 PM CDT
FOR NORTHEASTERN WEBB COUNTY...

At 608 PM CDT, a severe thunderstorm was located 10 miles east of
Encinal, moving southeast at 15 mph.

HAZARD...Golf ball size hail and 60 mph wind gusts.

SOURCE...Radar indicated.

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

This severe thunderstorm will remain over mainly rural areas of
northeastern Webb County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2802 9944 2804 9939 2803 9932 2805 9910
      2787 9914
TIME...MOT...LOC 2308Z 303DEG 13KT 2799 9920 

HAIL...1.75IN
WIND...60MPH
 
$$

GW

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 25, 5:52 AM CDT	Dense Fog Advisory	CRP	Bee, Calhoun, Goliad, Jim Wells, Kleberg, Live Oak and 4 more	3 hr
Apr 25, 4:50 PM CDT	Special Weather Statement	CRP	Webb	55 min
Apr 25, 5:29 PM CDT	Special Weather Statement	CRP	La Salle	61 min
Apr 25, 5:51 PM CDT	Special Weather Statement	CRP	Webb	54 min
Apr 25, 6:17 PM CDT	Severe Thunderstorm Warning	CRP	Duval, La Salle, Webb	43 min
Apr 25, 6:18 PM CDT	Severe Thunderstorm Warning	CRP	Webb	57 min

Nearby

Severe Thunderstorm Warnings in Texas, 2018 Every severe thunderstorm warning in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.