Alert archive / Texas / Flash Flood Warnings in 1998

Flash Flood Warning 138, NWS Austin/San Antonio, TX

September 11, 1998DeWitt County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Sep 11, 1998, 12:24 AM CDT for DeWitt County, Texas. It was in force for 5 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
Sep 11, 1998, 12:24 AM CDT (05:24 UTC)
Expired
Sep 11, 1998, 5:30 AM CDT
In force
5 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County DeWitt County, TX

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 5.4 hours before the alert went out and 150 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 1998-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4 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 00:00Z on 1998-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 76 square meters per square second.193958Sfc1 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
4 J/kg
Mixed-layer CIN
-114 J/kg
Mixed-layer LCL
501 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
76 m²/s²
0-3 km storm-relative helicity
170 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 KSAT 110526
FFWSAT
TXC123-111030-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1224 AM CDT FRI SEP 11 1998

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DEWITT COUNTY IN SOUTH CENTRAL TEXAS

* UNTIL 530 AM CDT

* FLASH FLOODING EXPECTED AROUND-
  COUNTY WIDE

* AT 1223 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAINS ASSOCIATED WITH TROPICAL STORM FRANCES MOVING
  INTO DEWITT COUNTY. RAINFALL RATES OF 1 TO 2 INCHES PER HOUR WILL
  CAUSE FLOODING OF LOW LYING AREAS AND LOW WATER CROSSINGS.
  DEWITT COUNTY DPS REPORTED THAT ROADWAYS ARE BEGINNING TO FLOOD IN
  THE CUERO AREA. SIMILAR CONDITIONS CAN BE EXPECTED COUNTY WIDE
  THROUGH THE MORNING HOURS.

IF YOU ARE IN THESE AREAS... MOVE TO HIGHER GROUND. DO NOT DRIVE
THROUGH WATER COVERING THE ROAD.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...
ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING. IT IS VERY DIFFICULT
AT NIGHT TO TELL HOW MUCH WATER IS ON ROADS. MOTORISTS SHOULD NOT
DRIVE THROUGH WATER OF UNKNOWN DEPTH.




&

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Sep 10, 11:29 PM CDTFlash Flood WarningEWXLavaca6 hr
Sep 11, 5:09 AM CDTFlash Flood WarningEWXDeWitt, Gonzales, Lavaca5 hr
Sep 11, 5:09 AM CDTFlash Flood WarningEWXKarnes5 hr
Sep 11, 8:16 AM CDTFlash Flood WarningEWXWilson4 hr
Sep 11, 8:53 AM CDTFlash Flood WarningEWXBastrop, Lee, Travis, Williamson4 hr
Sep 11, 9:58 AM CDTFlash Flood WarningEWXDeWitt, Karnes3 hr
Sep 11, 11:08 AM CDTFlash Flood WarningEWXGuadalupe112 min
Sep 11, 11:16 AM CDTFlash Flood WarningEWXComal104 min
Sep 11, 11:23 AM CDTFlash Flood WarningEWXBexar3 hr
Sep 11, 12:22 PM CDTFlash Flood WarningEWXWilson98 min
Sep 11, 6:03 PM CDTFlash Flood WarningEWXFayette, Lee2 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.