Alert archive / Texas / Flash Flood Warnings in 1998

Flash Flood Warning 46, NWS Corpus Christi, TX

October 20, 1998Kleberg County, Nueces County, San Patricio County, Texas

NWS Corpus Christi, TX issued this flash flood warning at Oct 20, 1998, 7:57 PM CDT for Kleberg County, Nueces County, San Patricio County, Texas. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Oct 20, 1998, 7:57 PM CDT (00:57 UTC)
Expired
Oct 21, 1998, 12:00 AM CDT
In force
4 hr
Issued by
NWS Corpus Christi, TX
Area
Whole counties

Counties Kleberg County, TX, Nueces County, TX, San Patricio County, TX

The radar

The Corpus Christi radar (KCRP), 9 km from the middle of the area, began a volume at 00:58 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 nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 1.0 hours before the alert went out and 22 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-pSkew-T log-p diagram, Corpus Christi, TX at 00:00Z on 1998-10-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1007 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 00:00Z on 1998-10-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1007 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
609 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
38 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCRP 210055
FFWCRP
TXC057-273-355-391-409-469-210500-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
757 PM CDT TUE OCT 20 1998

THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  KLEBERG IN SOUTH CENTRAL TEXAS
  NUECES IN SOUTH CENTRAL TEXAS
  SAN PATRICIO IN SOUTH CENTRAL TEXAS
  REFUGIO IN SOUTH CENTRAL TEXAS
  VICTORIA IN SOUTH CENTRAL TEXAS
  CALHOUN IN SOUTH CENTRAL TEXAS

* UNTIL MIDNIGHT CDT

* AT 750 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A LINE OF SHOWERS...WITH EMBEDDED HEAVY RAIN...EXTENDING FROM
  NEAR LONG MOTT...TO CORPUS CHRISTI...TO NEAR KINGSVILLE...MOVING
  SLOWLY TOWARD THE WEST.

  RADAR ESTIMATES INDICATE THAT IN THE PAST 3 HOURS...1/2 INCH TO 1
  INCH OF RAIN FELL OVER THE WARNED AREA. AN ADDITIONAL 1/2 TO 1
  INCH IS POSSIBLE UNTIL MIDNIGHT. THIS RAINFALL WILL CAUSE FLASH
  FLOODING...ESPECIALLY OVER LOW LYING AREAS.

  THIS FLASH FLOOD WARNING IS IN ADDITION TO RIVER FLOOD WARNINGS
  AFFECTING THE COASTAL BEND.

  BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
  DANGER OF FLOODING. DO NOT DRIVE INTO WATER OF UNKNOWN DEPTH.

  WC

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Oct 20, 2:40 PM CDT, 5 hours 17 minutes earlier.

Area forecast discussion, Oct 20, 2:40 PM CDT, 5 hours 17 minutes before
COASTAL BEND FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
240 PM CDT TUE OCT 20 1998

ALL THE MODELS ARE IN FAIR AGREEMENT IN SLOWLY DRYING US OUT THROUGH
THIS UPCOMING FCST PD.  THE QUASI-STATIONARY FNT LOCATED IN THE
COASTAL WATERS WL BE PUSHED SWD ON WED AS ANOTHER COLD FNT SWINGS
THROUGH THE CWA BY WED NIGHT.  MEANWHILE AN IMPRESSIVE AREA OF LOW
PRESSURE IN THE BAY OF CAMPECHE WL LKLY CONTINUE TO SLOWLY DEVELOP
AS IT SLOWS DOWN ITS WWD MOTION.  THE CURRENT THINKING IS THAT THE
MAIN EFFECT FROM ALL OF THIS WL BE TO INCREASE THE PRESSURE GRADIENT
AND CAA ESPECIALLY ACROSS THE COASTAL WATERS.  THUS WE MAY NEED A
SMALL CRAFT ADVY BY WED AFTN AS WINDS AND SEAS CONTINUE TO BUILD.
THINK MOST OF THE CONVECTION FROM THIS AREA OF LOW PRESSURE COMBINED
WITH THE OFFSHORE FNT WL REMAIN CONFINED TO THE OFFSHORE
WATERS...HOWEVER I CANNOT RULE OUT SOME SHRAS/TSRAS MAKING IT TO THE
SRN COASTAL AREAS.  EITHER WAY I WL BE GOING WITH SLIGHT CHC OR CHC
POPS THROUGH WED FOR THE ENTIRE CWA GIVEN THE MOIST AIRMASS.

MODERATE NLY/NELY LOW LVL FLOW WL CONTINUE WED NIGHT INTO THU.
DURING THIS PD...THE MID/UPR LVL FLOW BECOMES NLY AS WELL.  THUS THE
DRYING OUT PROCESS WL BE QUITE GOOD.  THE CAA WL ALSO CONTINUE AS
WELL.  WE MAY SEE A FEW SHRAS/SPRINKLES EARLY WED EVE BUT RIGHT NOW
I AM LEANING TWDS NO POPS FOR WED NIGHT.  WE WL BE TOO DRY ON THU SO
NO POPS WL BE NEEDED.

HAVE TRENDED TWDS THE WARMER NGM MOS FOR TNT AND SHAVED A FEW DEGS
FOR WED NIGHT.  HOWEVER THE NGM MOS IS WAY TOO WARM FOR ITS FCST
HIGHS.  THUS THE COOLER FAN HIGHS ARE FAVORED.

PRELIMS FOLLOW...

CRP EB 069/075 062/072 052 3300
VCT EB 067/072 057/070 045 3200
LRD CE 066/071 058/068 048 2210
ALI EB 069/076 060/071 047 3300
NGP EB 072/078 067/074 060 3300

MB

The office that day

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

IssuedProductOfficeCountiesLasted
Oct 20, 7:57 PM CDTFlash Flood WarningCRPCalhoun, Refugio, Victoria4 hr

Nearby

Flash Flood Warnings in Texas, 1998Every flash flood warning in 1998

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.