Alert archive / Texas / Flash Flood Warnings in 1998

Flash Flood Warning 129, NWS Houston/Galveston, TX

November 12, 1998Walker County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Nov 12, 1998, 10:56 PM CST for Walker County, Texas. It was in force for 119 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
Nov 12, 1998, 10:56 PM CST (04:56 UTC)
Expired
Nov 13, 1998, 12:55 AM CST
In force
119 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

County Walker County, TX

The radar

The Houston radar (KHGX), 149 km from the middle of the area, began a volume at 05:02 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

Shreveport, LA (KSHV), launched 00:00Z, 4.9 hours before the alert went out and 259 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, Shreveport, LA at 00:00Z on 1998-11-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 00:00Z on 1998-11-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 300 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
593 m above ground
0-6 km bulk shear
48 kt
0-1 km storm-relative helicity
300 m²/s²
0-3 km storm-relative helicity
298 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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, 8 hours 26 minutes earlier.

Area forecast discussion, Nov 12, 2:30 PM CST, 8 hours 26 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 WarningHGXAustin, Colorado, Fort Bend, Jackson, Wharton3 hr
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 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.