Alert archive / Texas / Flash Flood Warnings in 1998

Flash Flood Warning 1, NWS Corpus Christi, TX

January 6, 1998Webb County, Texas

NWS Corpus Christi, TX issued this flash flood warning at Jan 6, 1998, 11:03 AM CST for Webb County, Texas. It was in force for 117 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jan 6, 1998, 11:03 AM CST (17:03 UTC)
Expired
Jan 6, 1998, 1:00 PM CST
In force
117 min
Issued by
NWS Corpus Christi, TX
Area
Whole counties

County Webb County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 12:00Z, 5.1 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-pSkew-T log-p diagram, Corpus Christi, TX at 12:00Z on 1998-01-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1989 joules per kilogram.LCLLFCEL10008507005003002001001 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 12:00Z on 1998-01-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 101 square meters per square second.1939587897Sfc1 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
1989 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
476 m above ground
0-6 km bulk shear
32 kt
0-1 km storm-relative helicity
101 m²/s²
0-3 km storm-relative helicity
124 m²/s²
Significant tornado parameter
0.5
Supercell composite
2.7

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KCRP 061705
FFWCRP
TXC479-061900-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
1103 AM CST TUE JAN 6 1998
 
THE NATIONAL WEATHER SERVICE IN CORPUS CHRISTI HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  100 PM CST
FOR PEOPLE IN THE FOLLOWING COUNTY......
 
IN SOUTH CENTRAL TEXAS
 
   ...NORTHWESTERN WEBB COUNTY
 
AT 1100 AM CST DOPPLER RADAR SHOWED SHOWERS AND THUNDERSTORMS WITH VERY
HEAVY RAINFALL OVER NORTHWEST WEBB COUNTY. RAINFALL AMOUNTS UP TO 2 INCH
HAS FALLEN ACROSS THE AREA FROM 30 MILES NORTHWEST OF LAREDO TO 30 MILES
WEST OF ARTESIA WELLS.  AN ADDITIONAL 1 TO 2 INCHES OF RAIN IS POSSIBLE
THROUGH 1PM CAUSING FLOODING OF LOW LYING AREA AND LOW WATER CROSSINGS.
 
THE RAIN ACTIVITY WAS MOVING SLOWLY NORTHEAST AT 15 MPH.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

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 Jan 6, 9:45 AM CST, 1 hour 18 minutes earlier.

Area forecast discussion, Jan 6, 9:45 AM CST, 1 hour 18 minutes before
COASTAL BEND FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CORPUS CHRISTI TX
945 AM CST TUE JAN 6 1998

NO CHANGES NEEDED IN MORNING UPDATE.
WV IMAGERY SHOWS UPPER S/W JUST WEST OF THE RIO GRANDE CONCURRENT
WITH 12Z ETA MODEL...MVG EAST.  SFC ANALYSIS SHOWS PAC FNTL BNRY JUST
WEST OF LRD-E JCT LINE ALSO MVG EAST.  CRP/DFX 88DS BOTH SHOW ONE
LARGE PRECIP CELL DVLPG JUST WEST OF WEBB COUNTY ALG THE LEADING EDGE
OF PAC FNTL BNDRY.  THIS STORM HAS WK ROTATIONAL SIGNATURE AND WILL
BE CLOSELY MONITORED AS IT MVS SLOWLY NE.  LOOKS LIKE THIS CELL COULD
SKIRT JUST N OF OUR CWA.  OTHER WIDELY SCT PRECIP ECHOS WERE MVG NWD
IN UNIFORM SLY FLOW.

AMS ACROSS THE REGION IS VERY MOIST AND UNSTABLE FOR THIS TIME OF
YEAR.  PWS 1.50 INCHES AND LIS -7.  MAIN DYNAMICS WILL MV ACROSS THE
REGION THIS AFTN WITH PRECIP FOCUSED ALG SFC-H85 BNDRY ENHANCED BY
STGLY TILTED UPPER TROF (PVA).  MAIN PRECIP AREA WILL OCCUR ALG A
SAT-HOU LINE WHERE FFA AND BEST MOISTURE ADV EXISTS.

FCST HAS 50-60% POPS IN FOR OUR AREA TDY WHICH LOOKS GOOD.  COULD BE
A FEW ISOLATED SVR STORMS IF WEBB CNTY STORM HOLDS TOGETHER.  WILL
MAKE NO CHANGES TO ZONES THIS MORNING.

JM....075

The office that day

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

IssuedProductOfficeCountiesLasted
Jan 6, 10:04 AM CSTSevere Thunderstorm WarningCRPWebb56 min
Jan 6, 4:08 PM CSTSevere Thunderstorm WarningCRPVictoria67 min
Jan 6, 4:49 PM CSTSevere Thunderstorm WarningCRPGoliad56 min

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.