Alert archive / Texas / Flash Flood Warnings in 2001

Flash Flood Warning 21, NWS Houston/Galveston, TX

June 7, 2001Houston County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Jun 7, 2001, 8:45 PM CDT for Houston County, 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 outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued
Jun 7, 2001, 8:45 PM CDT (01:45 UTC)
Expired
Jun 7, 2001, 11:30 PM CDT
In force
3 hr
Issued by
NWS Houston/Galveston, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Houston County, TX

The radar

The Shreveport radar (KSHV), 191 km from the middle of the area, began a volume at 01:44 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, 1.8 hours before the alert went out and 199 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 2001-06-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 894 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, Shreveport, LA at 00:00Z on 2001-06-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -4 square meters per square second.1939Sfc1 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
894 J/kg
Mixed-layer CIN
-21 J/kg
Mixed-layer LCL
777 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
-4 m²/s²
0-3 km storm-relative helicity
7 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS54 KHGX 080147
FFWHGX
TXC225-080430-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
845 PM CDT THU JUN 7 2001

THE NATIONAL WEATHER SERVICE HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HOUSTON COUNTY IN SOUTHEAST TEXAS

* UNTIL 1130 PM CDT

* AT 830 PM CDT...SHERIFFS OFFICE REPORTED ROAD CLOSURES DUE TO
RUNOFF FROM MORE HEAVY RAIN. FLOODED ROADS INCLUDED FM230 BETWEEN
LOVELADY AND WELDON...HOUSTON COUNTY LAKE ROAD FM229...FM1280
BETWEEN LOVELADY AND AUSTONIO...FM2110.  LOCAL STREET FLOODING WAS
OCCURRING IN CROCKETT AND HIGH WATER WAS ON SH19 BETWEEN CROCKETT
AND TRINITY. UP TO 5 INCHES OF RAIN HAS FALLEN SINCE THIS MORNING.
MORE HEAVY DOWNPOURS CONTINUE TO DEVELOP SOUTHEAST OF HOUSTON COUNTY
THEN MOVE NORTHWEST.  EXPECT 1 TO 3 INCHES OF ADDITIONAL RAIN BY 11
PM.

* FLOODING IS EXPECTED OVER MUCH OF THE COUNTY.

DO NOT CROSS ANY LOCATION WHERE WATER COVERS THE ROAD!

USE EXTRA CAUTION AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DEPTH
AND SPEED OF FLASH FLOOD WATERS.

PLEASE REPORT FLOODING TO THE COUNTY SHERIFF...LOCAL POLICE...OR
DEPARTMENT OF PUBLIC SAFETY. THEY WILL RELAY YOUR REPORT TO THE
NATIONAL WEATHER SERVICE.

LAT...LON 3157 9520 3136 9502 3099 9558 3115 9569
          3151 9569

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 7, 8:02 PM CDTFlash Flood WarningHGXLiberty3 hr
Jun 7, 10:44 PM CDTFlash Flood WarningHGXWalker3 hr
Jun 7, 11:21 PM CDTFlash Flood WarningHGXHouston3 hr
Jun 7, 11:48 PM CDTFlash Flood WarningHGXLiberty3 hr
Jun 8, 1:37 AM CDTSevere Thunderstorm WarningHGXChambers38 min
Jun 8, 1:49 AM CDTFlash Flood WarningHGXLiberty4 hr
Jun 8, 2:50 AM CDTFlash Flood WarningHGXHouston, Trinity, Walker6 hr
Jun 8, 3:57 AM CDTSevere Thunderstorm WarningHGXGalveston, Harris63 min
Jun 8, 4:25 AM CDTFlash Flood WarningHGXBrazoria, Chambers, Galveston, Liberty3 hr
Jun 8, 6:41 AM CDTFlash Flood WarningHGXPolk2 hr
Jun 8, 7:15 AM CDTFlash Flood WarningHGXBrazoria3 hr
Jun 8, 7:23 AM CDTFlash Flood WarningHGXLiberty3 hr
Jun 8, 3:48 PM CDTFlash Flood WarningHGXMontgomery, Walker3 hr
Jun 8, 5:10 PM CDTFlash Flood WarningHGXHarris3 hr
Jun 8, 5:30 PM CDTFlash Flood WarningHGXBrazoria, Fort Bend3 hr
Jun 8, 5:46 PM CDTTornado WarningHGXMontgomery44 min
Jun 8, 6:40 PM CDTFlash Flood WarningHGXWashington3 hr
Jun 8, 6:52 PM CDTFlash Flood WarningHGXMontgomery, Walker3 hr

Nearby

Flash Flood Warnings in Texas, 2001Every flash flood warning in 2001

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.