Alert archive / Texas / Severe Thunderstorm Warnings in 1997

Severe Thunderstorm Warning 101, NWS Corpus Christi, TX

October 30, 1997Live Oak County, Texas

NWS Corpus Christi, TX issued this severe thunderstorm warning at Oct 30, 1997, 4:55 PM CST for Live Oak County, Texas. It was in force for 65 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Oct 30, 1997, 4:55 PM CST (22:55 UTC)
Expired: Oct 30, 1997, 6:00 PM CST
In force: 65 min
Issued by: NWS Corpus Christi, TX
Area: Whole counties

County Live Oak County, TX

The radar

The Corpus Christi radar (KCRP), 87 km from the middle of the area, began a volume at 22:57 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
Oct 30, 5:15 PM CST	Hail 1	Three Rivers, TX	Sheriff report of quarter sized hail.

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.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 10.9 hours before the alert went out and 103 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: 1272 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 609 m above ground
0-6 km bulk shear: 40 kt
0-1 km storm-relative helicity: 167 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 1.1
Supercell composite: 7.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCRP 302257 RRA
SVRCRP
TXC297-310000-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
455 PM CST THU OCT 30 1997
 
THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL  600 PM CST
FOR PEOPLE IN THE FOLLOWING COUNTY......
 
IN SOUTH CENTRAL TEXAS
 
   ...LIVE OAK COUNTY
 
DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM ABOUT 3 MILES NORTH OF
THREE RIVERS ALONG HIGHWAY 37. THIS THUNDERSTORM WAS MOVING EAST AND
NORTHEAST AT 15 MPH. THIS STORM WILL PASS ACROSS HIGHWAY 72 IN THE
NORTHEAST PART OF LIVE OAK COUNTY BY 530 PM CST.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55
MPH...DESTRUC*TIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR
OF YOUR HOME OR BUSINESS.  HEAVY RAINS FLOOD ROADS QUICKLY SO
DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.

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 Oct 30, 2:30 PM CST, 2 hours 25 minutes earlier.

Area forecast discussion, Oct 30, 2:30 PM CST, 2 hours 25 minutes before

COASTAL BEND FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
230 PM CST THU OCT 30 1997

UPPER TROF IS ON THE MOVE.  WV LOOP AND MODEL DATA PLACES THE UPPER
TROF FROM DSM-AMA-E CNTRL MX WITH A 90KT SUBTROP JET NOSING INTO
CNTRL TX.  THE DYNAMICS FROM THESE FEATURES ARE CAUSING LOW LVL
MOISTURE TO SURGE RAPIDLY NWD INTO THE REGION FROM THE VALLEY WITH
SFC DWPTS IN THE LOWER 70S.  THE ATMOS IS UNSTABLE WITH LIS OF -6
AND CAPES 1600-2000J/KG.  88D SHOWING WIDELY SCT THUNDERSTORMS DVLPG
ALG THE LOW LVL MOISTURE AXIS FROM BRO TO CRP TO VCT...WHERE
CONVERGENCE IS INCREASING.  EXPECT CONVECTION TO CONTINUE DEVELOPING
ACROSS THE CWA FOR THE REMAINDER OF THIS AFTN WITH AN INCREASE IN
ACTIVITY THIS EVENING WHEN THE TROF APCHS.  MODELS BRING THE LOW LVL
TROF THRU LRD THIS EVENING...THEN TO AN ALI-SAT LINE BY MIDNIGHT.
THE TROF WILL PUSH COMPLETELY THRU THE CWA BY 12Z FRI BRINGING AND
END TO CLOUDS AND PRECIP WITH DRIER NW WINDS IN ITS WAKE.

MUCH WARMER TEMPERATURES ARE EXPECTED FRI AND SAT BEFORE THE MAIN PAC
FNT BLASTS THRU SATURDAY AFTN.  THCK VALUES INCREASE SOME WITH WLY
LOW LVL FLOW BUT NOT ENOUGH TO JUSTIFY THE NUMBERS NGM IS
ADVERTISING.  WILL GO WITH A BLEND OF AVN/NGM FOR HIGHS.  LOW TEMPS
LOOK REASONABLE.

(CRP VCT)
.TNGT...M/C WITH 40% CHC OF SH/TSRA.  DECREASING CLOUDS WITH RAIN
ENDING TOWARD AM.  PATCHY FOG IS POSSIBLE.  SE WINDS NR 10 MPH SHIFTG
NW 10-15 MPH TOWARD AM.
.FRI...MOSTLY SUNNY AND WARM.  NW WINDS 10-15 MPH.
.FRI NGT...CLEAR.
.SAT...MOSTLY SUNNY...TURNING BREEZY AND COOLER IN THE AFTN.

(LRD)
.TNGT...M/C WITH 40% CHC OF SH/TSRA.  DECREASING CLOUDS LATE.
SOUTHEAST WINDS NR 10 MPH SHIFTG NW NR 10 MPH LATE.
.FRI...SUNNY AND WARM.  NW WINDS NR 10 MPH.
.FRI NGT...CLEAR.
.SAT...MOSTLY SUNNY...TURNING BREEZY AND COOLER IN THE AFTN.

PRELIMS...

CRP UU 065/086 058/085 4-00
NGP UU 068/085 063/084
ALI UU 064/088 057/085 4-00
VCT UU 065/086 055/084 4-00
LRD UU 063/088 056/086 4000

JM...075

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 30, 5:18 PM CST	Severe Thunderstorm Warning	CRP	Bee	57 min

Nearby

Severe Thunderstorm Warnings in Texas, 1997 Every severe thunderstorm warning in 1997

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; radar from the NEXRAD Level II archive.