Alert archive / Texas / Flash Flood Warnings in 1990

Flash Flood Warning 6, NWS Houston/Galveston, TX

May 31, 1990Polk County, San Jacinto County, Trinity County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at May 31, 1990, 8:04 PM CDT for Polk County, San Jacinto County, Trinity County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
May 31, 1990, 8:04 PM CDT (01:04 UTC)
Expired
Jun 1, 1990, 12:00 AM CDT
In force
4 hr
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

Counties Polk County, TX, San Jacinto County, TX, Trinity County, TX

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Longview/Gregg, TX (KGGG), launched 00:00Z, 1.1 hours before the alert went out and 175 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, Longview/Gregg, TX at 00:00Z on 1990-06-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 11 joules per kilogram.LCLLFCEL10008507005003002001001 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, Longview/Gregg, TX at 00:00Z on 1990-06-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 112 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
11 J/kg
Mixed-layer CIN
-423 J/kg
Mixed-layer LCL
2002 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
112 m²/s²
0-3 km storm-relative helicity
123 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 KHOU 010305
FFWHOU
TXC455-373-407-010500-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON TX
1004 PM CDT THU MAY 31 1990
 
THE NATIONAL WEATHER SERVICE IN HOUSTON HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL MIDNIGHT CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN NORTHEAST TEXAS
 
   ...TRINITY COUNTY
 
IN SOUTHEAST TEXAS
 
   ...WESTERN POLK COUNTY...NORTHERN SAN JACINTO COUNTY
 
AT 950 PM CDT RADAR INDICATED THE RAINS HAVE ENDED OVER TRINITY AND
POKE COUNIES. AN ISOLATED THUNDERSTORM AND PATCHY LIGHT RAIN WAS NOTED
OVER SAN JACINTO COUNTY.
 
ALTHOUGH THE RAINS HAVE ENDED OVER THE AREA SATELLITE AND RADAR
INDICATED BETWEEN 4 AND 8 INCHES OF RAIN FALL IN THE AREA AND REPORTS
FROM THE AREA INDICATE FLOODING IS STILL OCCURRING AND FLOODING WILL
CONTINUE TO EFFECT THE AREA FOR ANOTHER FEW HOURS UNTILL THE WATER
RECEEDS.
 
THE TRINITY COUNTY SHERIFF DEPARTMENT REPORT MANY ROADS IN THE AREA
ARE STILL FLOODED...HIGHWAY 59 AMONG THESE.
 
POLK COUNTY SHERIFF DEPARTMENT REPORTED HIGHWAY 356 IS THE ONLY HIGHWASTILL UNDER WATER.
 
SAN JACINTO COUNTY SHERIFF DEPARTMENT REPORTED HIGHWAY 190 NEAR POINT
BLANK STILL FLOODED.
 
 
 
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 pFOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

The office that day

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

IssuedProductOfficeCountiesLasted
May 31, 7:48 PM CDTFlash Flood WarningHGXPolk117 min
May 31, 8:03 PM CDTFlash Flood WarningHGXHouston, Trinity117 min
May 31, 8:45 PM CDTFlash Flood WarningHGXSan Jacinto2 hr

Nearby

Flash Flood Warnings in Texas, 1990Every flash flood warning in 1990

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.