Alert archive / Texas / Flash Flood Warnings in 1998

Flash Flood Warning 124, NWS Houston/Galveston, TX

November 12, 19985 counties in Texas

NWS Houston/Galveston, TX issued this flash flood warning at Nov 12, 1998, 9:54 PM CST for 5 counties in Texas. It was in force for 3 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
Nov 12, 1998, 9:54 PM CST (03:54 UTC)
Expired
Nov 13, 1998, 12:55 AM CST
In force
3 hr
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

Counties Austin County, TX, Colorado County, TX, Fort Bend County, TX, Jackson County, TX, Wharton County, TX

The radar

The Houston radar (KHGX), 116 km from the middle of the area, began a volume at 03:57 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.

The nearest sounding before it

Corpus Christi, TX (KCRP), launched 00:00Z, 3.9 hours before the alert went out and 218 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 1998-11-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 951 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 1998-11-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 159 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
951 J/kg
Mixed-layer CIN
-1 J/kg
Mixed-layer LCL
478 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
159 m²/s²
0-3 km storm-relative helicity
162 m²/s²
Significant tornado parameter
0.6
Supercell composite
3.7

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Houston/Galveston, TX wrote its last area forecast discussion before this flash flood warning went out at Nov 12, 2:30 PM CST, 7 hours 24 minutes earlier.

Area forecast discussion, Nov 12, 2:30 PM CST, 7 hours 24 minutes before
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The office that day

Everything else NWS Houston/Galveston, TX issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Nov 12, 7:45 PM CSTFlash Flood WarningHGXLiberty, Polk, San Jacinto, Trinity3 hr
Nov 12, 7:45 PM CSTFlash Flood WarningHGXMontgomery3 hr
Nov 12, 8:00 PM CSTFlash Flood WarningHGXAustin, Grimes, Waller, Washington115 min
Nov 12, 8:00 PM CSTFlash Flood WarningHGXColorado, Fort Bend, Jackson, Wharton115 min
Nov 12, 8:00 PM CSTFlash Flood WarningHGXHarris115 min
Nov 12, 9:54 PM CSTFlash Flood WarningHGXHarris, Waller3 hr
Nov 12, 9:54 PM CSTFlash Flood WarningHGXGrimes, Washington3 hr
Nov 12, 10:45 PM CSTFlash Flood WarningHGXLiberty, Montgomery, Polk, San Jacinto2 hr
Nov 12, 10:45 PM CSTFlash Flood WarningHGXTrinity2 hr
Nov 12, 10:56 PM CSTFlash Flood WarningHGXWalker119 min
Nov 12, 10:56 PM CSTFlash Flood WarningHGXWalker94 min
Nov 13, 1:00 AM CSTFlash Flood WarningHGXFort Bend, Harris, Liberty, Montgomery, Waller4 hr
Nov 13, 1:00 AM CSTFlash Flood WarningHGXPolk, San Jacinto, Trinity, Walker4 hr
Nov 13, 1:00 AM CSTFlash Flood WarningHGXColorado, Jackson, Wharton4 hr
Nov 13, 1:00 AM CSTFlash Flood WarningHGXAustin, Washington4 hr
Nov 13, 1:00 AM CSTFlash Flood WarningHGXGrimes4 hr
Nov 13, 5:02 AM CSTFlash Flood WarningHGXHarris, Liberty, Montgomery4 hr
Nov 13, 5:02 AM CSTFlash Flood WarningHGXPolk, San Jacinto, Trinity, Walker4 hr
Nov 13, 9:15 AM CSTFlash Flood WarningHGXLiberty, Montgomery, Polk, San Jacinto, Trinity3 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.