Alert archive / Texas / Flash Flood Warnings in 1990

Flash Flood Warning 1, NWS Houston/Galveston, TX

March 28, 1990Polk County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Mar 28, 1990, 10:42 PM CST for Polk County, Texas. It was in force for 4 hr.

The area

The counties it named.

The facts

Issued
Mar 28, 1990, 10:42 PM CST (04:42 UTC)
Expired
Mar 29, 1990, 2:45 AM CST
In force
4 hr
Issued by
NWS Houston/Galveston, TX
Area
Whole counties

County Polk 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

Lake Charles Mun, LA (KLCH), launched 00:00Z, 4.7 hours before the alert went out and 173 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, Lake Charles Mun, LA at 00:00Z on 1990-03-29Temperature 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 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lake Charles Mun, LA at 00:00Z on 1990-03-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.19395878Sfc1 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
1066 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
57 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 290444
FFWHOU
TXC373-290845-
 
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON TX
1042 PM CST WED MAR 28 1990
 
THE NATIONAL WEATHER SERVICE IN HOUSTON HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  245 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTHEAST TEXAS
 
   ...SOUTH CENTRAL POLK COUNTY
 
PERSISTANT THUNDERSTORMS OVER THE PAST FEW HOURS HAVE CAUSED SOME
LOCAL FLOODING IN THE SOUTHCENTRAL PART OF POLK COUNTY...SLIGHTLY
SOUTH AND SOUTHWEST OF THE CITY OF LIVINGSTON. THERE WERE REPORTS
FROM THE SHERRIFS DEPARTMENT OF 8 TO 10 INCHES OF WATER OVER HIGHWAY
2457...6 INCHES OVER FM 3126...AND STREET FLOODING IN SMALL
COMMUNITIES A LITTLE SOUTH OF LIVINGSTON.  MAJOR HIGHWAYS APPEAR TO
BE IN GOOD CONDITION.
 
THE THUNDERSTORM ACTIVITY IN THE COUNTY IS STEADILY DIMINISHING AND
MOVING TO THE NORTHEAST...SO THAT RESIDENTS IN LOW LYING COMMUNITIES
THAT HAVE RECEIVED FLOODING CAN EXPECT RELIEF AS FAR AS ANY FURTHER
HEAVY RAINS...WITH RAINS GRADUALL ENDING ACROSS THE AREA OVER THE
NEXT HOUR.
 
HOWEVER...FLOODED AREAS WILL BE VERY SLOW TO RECEDE AND MAY TAKE
SEVERAL HOURS DO SO.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE 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.

In the hours before

Special weather statement, Mar 28, 6:21 PM CST, 4 hours 21 minutes before
TXZ046-045-290215-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON TX
620 PM CST WED MAR 28 1990

AT 620 PM...RADAR SHOWS A STRONG THUNDERSTORM HAS DEVELOPED NEAR THE
NORTHERN PORTION OF LAKE LIVINGSTON AND WAS MOVING TO THE EAST
NORTHEAST. BOATERS ON THE NORTHERN END OF LAKE LIVINGSTON SHOULD HEAD
FOR SAFE HARBOUR IMMEDIATELY AS THIS THUNDERSTORM IS CAPABLE OF
PRODUCING STRONG GUSTY WINDS HAZARDOUS TO SMALL CRAFT.

ELSEWHERE...OTHEdR THUNDERSTORMS WERE SCATTERED FROM JUST NORTH OF LAKE
CONROE TO A LITTLE SOUTH OF LUFKIN... MOVING EASTWARD.  THESE ARE ALSO
CAPABLE OF STRONG GUSTY WINDS AND BRIEFLY HEAVY RAINS OVER THE NEXT
ONE TO TWO HOURS.
Special weather statement, Mar 28, 8:24 PM CST, 2 hours 18 minutes before
TXZ045-32-46-290430-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON TX
823 PM CST WED MAR 28 1990

THUNDERSTORMS HAVE PERSISTED FOR SEVERAL HOURS IN A FEW COUNTIES NEAR
LAKE LIVINGSTON....AND STILL CONTINUE FROM NEAR MADISONVILLE TO
HUNTSVILLE TO LAKE LIVINGSTON AND EAST OF LAKE LIVINGSTON.

JUDGING FROM RADAR INTENSITIES AS MUCH AS 2 TO 3 INCHES MAY HAVE
FALLEN IN PARTS OF WALKER...TRINITY...SAN JACINTO....AND POLK COUNTIES
IN SPOT LOCATIONS WITH SOME OF THE HEAVIER THUNDERSTORMS.  THERE HAVE
BEEN NO REPORTS OF FLOODING AT THIS TIME.  HOWEVER IT IS LIKELY THAT
THERE MAY BE SOME LOCALIZED FLOODING IN LOW LYING AREAS.

THE BAND OF THUNDERSTORMS IS DRIFTING SLOWLY SOUTH WHILE` INDIVIDUAL
THUNDERSTORMS WITHIN IT ARE MOVING EAST.   GRADUAL DIMINISHING
ACTIVITY IS EXPECTED OVER THESE COUNTIES OVER THE NEXT HOUR OR SO.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 29, 2:40 PM CSTSevere Thunderstorm WarningHGXMatagorda65 min
Mar 29, 3:00 PM CSTTornado WarningHGXAustin30 min
Mar 29, 3:31 PM CSTSevere Thunderstorm WarningHGXBrazoria29 min
Mar 29, 3:37 PM CSTSevere Thunderstorm WarningHGXHarris68 min
Mar 29, 3:45 PM CSTSevere Thunderstorm WarningHGXChambers, Galveston105 min

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.