Alert archive / Texas / Severe Thunderstorm Warnings in 2012

Severe Thunderstorm Warning 48, NWS Corpus Christi, TX

April 4, 2012Calhoun County, Texas

NWS Corpus Christi, TX issued this severe thunderstorm warning at Apr 4, 2012, 3:39 PM CDT for Calhoun County, Texas. It was in force for 66 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: Apr 4, 2012, 3:39 PM CDT (20:39 UTC)
Expired: Apr 4, 2012, 4:45 PM CDT
In force: 66 min
Issued by: NWS Corpus Christi, TX
Area: Storm-based polygon

County Calhoun County, TX

The radar

The Corpus Christi radar (KCRP), 133 km from the middle of the area, began a volume at 20:41 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.

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 4, 12:55 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 8.7 hours before the alert went out and 125 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: 3692 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 499 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: -42 m²/s²
0-3 km storm-relative helicity: 18 m²/s²
Significant tornado parameter: -0.5
Supercell composite: -3.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

206 
WUUS54 KCRP 042039
SVRCRP
TXC057-042145-
/O.NEW.KCRP.SV.W.0048.120404T2039Z-120404T2145Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
339 PM CDT WED APR 4 2012

THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  EASTERN CALHOUN COUNTY IN SOUTH CENTRAL TEXAS

* UNTIL 445 PM CDT

* AT 339 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE HAIL...AND
  DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS LOCATED NEAR
  MAGNOLIA BEACH...OR 7 MILES SOUTH OF PORT LAVACA...AND MOVING
  NORTHEAST AT 5 MPH.

* LOCATIONS IMPACTED INCLUDE...
  PORT LAVACA...
  ALAMO BEACH...
  MAGNOLIA BEACH...
  INDIANOLA...
  PORT OCONNOR...
  POINT COMFORT...
  OLIVIA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT
WEDNESDAY EVENING FOR SOUTHEASTERN TEXAS.

&&

LAT...LON 2863 9632 2856 9650 2854 9651 2846 9640
      2843 9639 2836 9656 2830 9663 2862 9675
      2869 9665 2865 9660 2860 9660 2860 9658
      2870 9658 2873 9640 2868 9640 2868 9632
TIME...MOT...LOC 2039Z 235DEG 6KT 2852 9657

$$


MB

2 follow-up statements

437 
WWUS54 KCRP 042057
SVSCRP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
357 PM CDT WED APR 4 2012

TXC057-042145-
/O.CON.KCRP.SV.W.0048.000000T0000Z-120404T2145Z/
CALHOUN-
357 PM CDT WED APR 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR EASTERN CALHOUN COUNTY...

AT 357 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING GOLF BALL SIZE
HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH.  THIS STORM WAS
LOCATED NEAR ALAMO BEACH...OR NEAR PORT LAVACA...MOVING NORTHEAST AT
10 MPH.

* LOCATIONS IMPACTED INCLUDE...
  ALAMO BEACH...
  POINT COMFORT...
  OLIVIA...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT
WEDNESDAY EVENING FOR SOUTH TEXAS.

&&

LAT...LON 2863 9632 2856 9650 2854 9651 2846 9640
      2843 9639 2836 9656 2830 9663 2862 9675
      2869 9665 2865 9660 2860 9660 2860 9658
      2870 9658 2873 9640 2868 9640 2868 9632
TIME...MOT...LOC 2057Z 219DEG 10KT 2858 9660

$$


MB

945 
WWUS54 KCRP 042132
SVSCRP

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
432 PM CDT WED APR 4 2012

TXC057-042145-
/O.CON.KCRP.SV.W.0048.000000T0000Z-120404T2145Z/
CALHOUN-
432 PM CDT WED APR 4 2012

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 445 PM CDT
FOR NORTHEASTERN CALHOUN COUNTY...

AT 432 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL.  THIS STORM WAS LOCATED NEAR POINT COMFORT...OR 9 MILES
NORTHEAST OF PORT LAVACA...MOVING NORTHEAST AT 10 MPH.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 PM CDT
WEDNESDAY EVENING FOR SOUTH TEXAS.

&&

LAT...LON 2866 9637 2856 9650 2862 9675 2869 9665
      2865 9660 2860 9660 2860 9658 2870 9658
      2873 9640 2868 9640 2868 9632
TIME...MOT...LOC 2132Z 219DEG 10KT 2871 9650

$$


MB

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Corpus Christi, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Apr 4, 2:47 PM CDT, 52 minutes earlier.

Area forecast discussion, Apr 4, 2:47 PM CDT, 52 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
247 PM CDT WED APR 4 2012

.SHORT TERM (TONIGHT THROUGH THURSDAY NIGHT)...SEVERE THUNDERSTORM
POTENTIAL WILL BE THE MAIN FORECAST CONCERN IN THE SHORT TERM. 12Z
CRP SOUNDING SHOWS A WEAKER CAP ACROSS THE REGION THAN THIS TIME
YESTERDAY. 700MB TEMPS HAVE COOLED FROM 11 DEGREES C FROM YESTERDAY
TO ABOUT 7 DEGREES TODAY. LATEST SPC MESOANALYSIS PAINTS MLCAPES
OF 3500 J/KG WITH CIN PRETTY MUCH ERODED ACROSS THE COASTAL BEND
REGION. SHOWERS AND THUNDERSTORMS HAVE DEVELOPED THIS AFTERNOON
ALL READY IN THE VICTORIA AREA OVER TO PORT LAVACA AND POINT
COMFORT. ADDITIONAL CONVECTION EXPECTED ALONG THE BOUNDARY WHICH
HAS STALLED ACROSS THE THE REGION. SEVERE THUNDERSTORMS WITH A
LARGE HAIL/WIND THREAT WILL BE POSSIBLE GIVEN THE DEGREE OF
INSTABILITY THIS AFTERNOON. SEVERE THUNDERSTORM WATCH HAS BEEN
ISSUED FOR ALL OF THE AREA EXCEPT THE WESTERN BRUSH COUNTRY UNTIL
8PM THIS EVENING. ANTICIPATE THE COVERAGE OF STORMS TO DIMINISH
AFTER SUNSET WITH THE LOSS OF DAYTIME HEATING. MODELS INDICATE
NEAR SURFACE MOISTURE REMAINING ACROSS SOUTH TEXAS TONIGHT LEADING
TO ANOTHER ROUND OF FOG. UPPER LEVEL LOW WHICH HAS BEEN OVER THE
SOUTHERN PLAINS THE LAST COUPLE OF DAYS FINALLY MOVES TO THE EAST
ON THURSDAY WITH UPPER LEVEL RIDGING ACROSS SOUTH TEXAS...ENDING
THE CHANCES FOR PRECIP. WARM DAY ON THURSDAY WITH MIDDLE 90S
ACROSS THE BRUSH COUNTRY TO LOWER 80S ALONG THE COAST...MID/UPPER
80S INLAND.

&&

LONG-TERM (FRIDAY THROUGH WEDNESDAY)...THE EXTENDED FORECAST
CONTINUES TO BE DOMINATED BY AN UPPER LEVEL RIDGE OVERHEAD.
OVERALL...WARM AND TRANQUIL WEATHER WILL BE IN PLACE.
HOWEVER...COULD SEE A BIT OF PATCH FOG FRIDAY MORNING AND SATURDAY
MORNING AS LOW LEVEL MOISTURE REMAINS IN PLACE BENEATH THE DRIER AIR
ALOFT. THROUGH THIS WEEKEND...THE RIDGE OF HIGH PRESSURE WILL BREAK
DOWN A BIT AND SHIFT EASTWARD. THUS...850MB MOISTURE INCREASES
ACROSS THE REGION...ESPECIALLY THE WESTERN BRUSH COUNTRY.
THUS...ALONG WITH WEAK DISTURBANCES MOVING OUT OF MEXICO COULD AID
IN THE DEVELOPMENT OF AFTERNOON/EVENING CONVECTION OVER THE SIERRA
MADRE. THIS ACTIVITY COULD HOLD TOGETHER AND PUSH INTO THE BUSH
COUNTRY IN THE LATE EVENING HOURS. THUS...WILL KEEP MENTION OF
PRECIPITATION ACROSS FAR WEST THIS WEEKEND. THE GFS SOLUTION
CONTINUES TO BRING ANOTHER WEAK FRONTAL BOUNDARY INTO SOUTH CENTRAL
TEXAS BY NEXT WEDNESDAY...HOWEVER DEEP MOISTURE AND UPPER LEVEL LIFT
LOOK LIMITED.  FOR NOW WILL KEEP NEXT WEEK WARM AND DRY WITH LIGHT
TO MODERATE ONSHORE FLOW.

&&

.PRELIMINARY POINT TEMPS/POPS...
CORPUS CHRISTI    66  90  67  87  70  /  10  10  10  10  10
VICTORIA          62  88  62  85  66  /  10  10  10  10  10
LAREDO            68  96  70  95  70  /  10  10   0  10  10
ALICE             65  93  65  89  68  /  10  10  10  10  10
ROCKPORT          68  81  69  81  71  /  10  10  10  10  10
COTULLA           62  93  64  91  66  /  10  10   0  10  10
KINGSVILLE        67  92  66  87  68  /  10  10  10  10  10
NAVY CORPUS       69  80  68  84  71  /  10  10  10  10  10

&&

.CRP WATCHES/WARNINGS/ADVISORIES...
TX...NONE.
GM...NONE.

&&

TB/78...SHORT TERM
RG/82...LONG TERM

Hazardous weather outlook, Apr 4, 1:04 PM CDT, 2 hours 35 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
104 PM CDT WED APR 4 2012

GMZ230-235-250-255-270-275-TXZ229>234-239>247-051815-
BAYS AND WATERWAYS FROM BAFFIN BAY TO PORT ARANSAS-
BAYS AND WATERWAYS FROM PORT ARANSAS TO PORT O'CONNOR-
COASTAL WATERS FROM BAFFIN BAY TO PORT ARANSAS OUT 20 NM-
COASTAL WATERS FROM PORT ARANSAS TO MATAGORDA SHIP CHANNEL OUT
20 NM-WATERS FROM BAFFIN BAY TO PORT ARANSAS FROM 20 TO 60 NM-
WATERS FROM PORT ARANSAS TO MATAGORDA SHIP CHANNEL FROM 20 TO
60 NM-LA SALLE-MCMULLEN-LIVE OAK-BEE-GOLIAD-VICTORIA-WEBB-DUVAL-
JIM WELLS-KLEBERG-NUECES-SAN PATRICIO-ARANSAS-REFUGIO-CALHOUN-
104 PM CDT WED APR 4 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH TEXAS AND THE MIDDLE
TEXAS COASTAL WATERS.

.DAY ONE...THIS AFTERNOON AND TONIGHT

A SEVERE THUNDERSTORM WATCH HAS BEEN ISSUED FOR PORTIONS OF SOUTH
TEXAS...LASTING THROUGH 8 PM CDT. ISOLATED TO SCATTERED
THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON...MAINLY
ALONG AND EAST OF HIGHWAY 16. SOME STORMS COULD BE COME SEVERE
WITH LARGE HAIL AND DAMAGING WIND GUSTS BEING THE MAIN THREATS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THERE IS A SLIGHT CHANCE FOR THUNDERSTORMS OVER THE WESTERN BRUSH
COUNTRY SATURDAY AND SUNDAY EVENINGS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON.

RG

In the hours before

Local storm report, Apr 4, 3:34 PM CDT, 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
334 PM CDT WED APR 04 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0328 PM     HAIL             AUSTWELL                28.39N 96.84W
04/04/2012  E1.75 INCH       REFUGIO            TX   POST OFFICE

            REPORTED BY MAYOR WHO IS ALSO THE POSTMASTER

&&

DVOGELSA

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 4, 3:05 PM CDT	Severe Thunderstorm Warning	CRP	Calhoun, Refugio	40 min
Apr 4, 3:09 PM CDT	Special Marine Warning	CRP		51 min
Apr 4, 3:45 PM CDT	Severe Thunderstorm Warning	CRP	Calhoun	30 min
Apr 4, 3:54 PM CDT	Severe Thunderstorm Warning	CRP	Aransas, Refugio	36 min
Apr 4, 4:02 PM CDT	Special Marine Warning	CRP		44 min
Apr 4, 4:17 PM CDT	Areal Flood Advisory	CRP	Calhoun, Refugio	88 min

Nearby

Severe Thunderstorm Warnings in Texas, 2012 Every severe thunderstorm warning in 2012

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.