Alert archive / Texas / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 9, NWS Corpus Christi, TX

April 8, 2002Calhoun County, Victoria County, Texas

NWS Corpus Christi, TX issued this severe thunderstorm warning at Apr 8, 2002, 4:25 AM CDT for Calhoun County, Victoria County, Texas. It was in force for 65 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 8, 2002, 4:25 AM CDT (09:25 UTC)
Expired: Apr 8, 2002, 5:30 AM CDT
In force: 65 min
Issued by: NWS Corpus Christi, TX
Area: Counties, with a storm outline in the text

Counties Calhoun County, TX, Victoria County, TX

What was reported inside it

Time	Report	Where	Remark
Apr 8, 5:35 AM CDT	Hail 0.75	Victoria, TX

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

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 8, 1:00 AM CDT	Severe Thunderstorm Watch	SPC	4 hr
Apr 8, 3:00 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 9.4 hours before the alert went out and 124 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: 2444 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 655 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 180 m²/s²
0-3 km storm-relative helicity: 182 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 6.1

Open this sounding in Storm Lab

The text

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

000 
WUUS54 KCRP 080925
SVRCRP
TXC057-469-081030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
423 AM CDT MON APR 8 2002

THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  CALHOUN COUNTY IN TEXAS
  VICTORIA COUNTY IN TEXAS

* UNTIL 530 AM CDT

* AT 417 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 6 MILES WEST OF NURSERY TO 6
  MILES SOUTH OF BLOOMINGTON...OR FROM 12 MILES SOUTHEAST OF CUERO TO
  17 MILES WEST OF PORT LAVACA. THE LINE IS MOVING EAST AT 20 MPH    
  AND MAY BUILD FURTHER SOUTH INTO CALHOUN COUNTY.

THE SEVERE THUNDERSTORMS ARE CAPABLE OF PRODUCING...WINDS IN EXCESS 
OF 60 MPH AND HAIL LARGER THAN DIME SIZE.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT FOR PORTIONS OF SOUTH 
TEXAS.

LAT...LON 2900 9730 2840 9675 2846 9642 2907 9693

PURPURA

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 8, 3:45 AM CDT, 40 minutes earlier.

Area forecast discussion, Apr 8, 3:45 AM CDT, 40 minutes before

COASTAL BEND FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
345 AM CDT MON APR 8 2002

SHORT TERM...THE UPPER LVL DISTURBANCE WILL MOVE EAST OF THE REGION
LATER TDA. AS A RESULT...THE CORRESPONDING SURFACE LOW WILL MOVE
ACROSS THE CWFA. VERTICAL MIXING OF STG WIND ALOFT AHEAD OF THE SFC
LOW WILL RESULT IN CONTINUED WINDY CONDITIONS OVER THE ERN CWFA
EARLY THIS MORNING. CONVECTION TO END BY THIS AFTN OWING TO SYNOPTIC
SCALE DESCENT/DRYING. WEST WINDS ALOFT/DRY AIR WILL CONTRIBUTE TO
WARM TEMPERATURES THIS AFTN. AS THE FOREGOING UPPER SYSTEM MOVES
EAST...A SFC FRONT IS PROGD TO ENTER THE CWFA BY TUESDAY. NO PCPN
EXPECTED WITH THIS FRONT OWING IN PART TO INSUFFICIENT MSTR.

EXTENDED...THE NEXT SYSTEM EXPECTED TO ENTER THE WEST COAST WED...
THEN INTO THE SWRN CONUS THU THEN MOVE SLOWLY TOWARD NRN MEXICO. RTN
FLOW IN ADVANCE OF THIS SYSTEM WILL RESULT IN INCREASING
MSTR/INSTABILITY SUFFICIENT...BASED ON AVN SOUNDINGS...FOR CONVECTION
BY THU. MRF KEEPS THIS UPPER LOW QUASI-STATIONARY OVER NRN MEXICO
WITH AXIS STILL WEST OF THE CWFA THROUGH SUNDAY. WL KEEP CONVECTION
IN THE FCST THU-SUN.

MARINE...WILL CONTINUE SCA THROUGH THIS MORNING AS LO IN DEEP S TX
MOVES TO COAST AND GRADIENT RELAXES.

CRP BB 089/063 087/063 083 87300
VCT BB 087/061 086/060 082 87300
LRD BB 092/064 091/064 085 87200

.CRP...SEVERE THUNDERSTORM WATCH UNTIL 10Z
       SCA GMZ230-235-250-255-270-275.

87 (SYNOPTIC)
70 (MARINE)

In the hours before

Special weather statement, Apr 8, 12:45 AM CDT, 3 hours 40 minutes before

TXZ229>234-246-247-081000-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1245 AM CDT MON APR 8 2002

...SEVERE THUNDERSTORM WATCH IN EFFECT FOR THE NORTHERN COASTAL BEND
   UNTIL 500 AM CDT...

A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 500 AM CDT MONDAY
MORNING FOR THE COUNTIES OF LASALLE...MCMULLEN...LIVE OAK... BEE...
GOLIAD...VICTORIA...REFUGIO...AND CALHOUN.

A SEVERE THUNDERSTORM WATCH MEANS THAT CONDITIONS ARE FAVORABLE FOR
SEVERE THUNDERSTORMS TO DEVELOP IN THE WATCH AREA. SEVERE
THUNDERSTORMS PRODUCE HAIL...WITH A DIAMETER OF A DIME OR LARGER...
STRAIGHT-LINE WINDS OF 58 MILES PER HOUR OR GREATER...OR A TORNADO.

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...AND TELEVISION
FOR THE LATEST WEATHER INFORMATION.

WC

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 8, 2:38 AM CDT	Severe Thunderstorm Warning	CRP	Duval, Jim Wells, Live Oak	52 min
Apr 8, 2:41 AM CDT	Severe Thunderstorm Warning	CRP	Duval, Jim Wells, Live Oak	49 min
Apr 8, 3:45 AM CDT	Severe Thunderstorm Warning	CRP	Bee, Live Oak	60 min
Apr 8, 3:47 AM CDT	Severe Thunderstorm Warning	CRP	Bee, Live Oak	58 min
Apr 8, 4:01 AM CDT	Severe Thunderstorm Warning	CRP	Goliad	59 min
Apr 8, 4:19 AM CDT	Special Marine Warning	CRP		56 min
Apr 8, 5:33 AM CDT	Severe Thunderstorm Warning	CRP	Victoria	27 min

Nearby

Severe Thunderstorm Warnings in Texas, 2002 Every severe thunderstorm warning in 2002

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.