Alert archive / Texas / Flash Flood Warnings in 2000

Flash Flood Warning 2, NWS Houston/Galveston, TX

April 2, 2000Harris County, Texas

NWS Houston/Galveston, TX issued this flash flood warning at Apr 2, 2000, 5:05 AM CDT for Harris County, Texas. It was in force for 115 min. 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
Apr 2, 2000, 5:05 AM CDT (10:05 UTC)
Expired
Apr 2, 2000, 7:00 AM CDT
In force
115 min
Issued by
NWS Houston/Galveston, TX
Area
Whole counties; the outline is the Mesonet’s reconstruction

County Harris County, TX

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 00:00Z, 10.1 hours before the alert went out and 210 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 2000-04-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2474 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, Lake Charles Mun, LA at 00:00Z on 2000-04-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 90 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
2474 J/kg
Mixed-layer CIN
-49 J/kg
Mixed-layer LCL
499 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
90 m²/s²
0-3 km storm-relative helicity
184 m²/s²
Significant tornado parameter
2.1
Supercell composite
10.5

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KHGX 021004
FFWHGX
TXC201-021200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
505 AM CDT SUN APR 2 2000

THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON TX HAS ISSUED A

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

* UNTIL 700 AM CDT

* AT 500 AM CDT...DOPPLER RADAR INDICATES BETWEEN 3 AND 5 INCHES
  OF RAIN HAVE FALLEN IN THE KATY AREA. FLOODING HAS BEEN REPORTED
  BETWEEN KATY AND SPRING VALLEY. LAW ENFORCEMENT REPORTED A CREEK
  OVER ITS BANK NEAR SAUMS ROAD AT GREENHOUSE ROAD. FLOODING IS ALSO
  OCCURRING FROM KINGSLAND PARKWAY AT MASON PARK AND PROVINCIAL
  BOULEVARD.

  HEAVY RAIN HAS ALSO FALLEN ALONG A JERSEY VILLAGE TO SPRING LINE.
  A SLOW MOVING LINE OF SHOWERS AND THUNDERSTORMS CONTINUE OVER HARRIS
  COUNTY WHICH WILL LIKELY PRODUCE AN ADDITIONAL 2 TO 3 INCHES DURING
  THE NEXT ONE TO TWO HOURS.

FLASH FLOODING IS IMMINENT OR OCCURRING IN SMALL CREEKS...STREAMS...
BAYOUS...UNDERPASSES...AND FEEDER ROADS. DO NOT CROSS ANY LOCATION
WHERE WATER COVERS THE ROAD! USE EXTRA CAUTION AT NIGHT WHEN IT IS
HARDER TO RECOGNIZE THE DANGERS OF FLASH FLOODS.

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 3003 9510 2962 9514 2975 9567 3005 9581

&

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 2, 12:47 AM CSTSevere Thunderstorm WarningHGXPolk, San Jacinto43 min
Apr 2, 1:04 AM CSTSevere Thunderstorm WarningHGXWharton41 min
Apr 2, 3:11 AM CDTSevere Thunderstorm WarningHGXFort Bend, Harris49 min
Apr 2, 3:19 AM CDTSevere Thunderstorm WarningHGXJackson41 min
Apr 2, 3:30 AM CDTSevere Thunderstorm WarningHGXPolk45 min
Apr 2, 3:32 AM CDTSevere Thunderstorm WarningHGXHarris, Waller43 min
Apr 2, 3:55 AM CDTSevere Thunderstorm WarningHGXMontgomery35 min
Apr 2, 4:02 AM CDTFlash Flood WarningHGXMontgomery3 hr
Apr 2, 4:11 AM CDTSevere Thunderstorm WarningHGXHarris49 min
Apr 2, 4:21 AM CDTSevere Thunderstorm WarningHGXPolk, San Jacinto54 min
Apr 2, 4:38 AM CDTSevere Thunderstorm WarningHGXLiberty52 min
Apr 2, 5:07 AM CDTSevere Thunderstorm WarningHGXHarris53 min
Apr 2, 5:55 AM CDTSevere Thunderstorm WarningHGXHarris, Liberty50 min
Apr 2, 7:43 AM CDTSevere Thunderstorm WarningHGXFort Bend47 min
Apr 2, 12:29 PM CDTSevere Thunderstorm WarningHGXMatagorda71 min
Apr 2, 12:33 PM CDTSevere Thunderstorm WarningHGXBrazoria57 min
Apr 2, 1:24 PM CDTTornado WarningHGXBrazoria, Matagorda36 min
Apr 2, 1:31 PM CDTSevere Thunderstorm WarningHGXGalveston, Harris59 min
Apr 2, 2:08 PM CDTSevere Thunderstorm WarningHGXChambers67 min
Apr 2, 2:26 PM CDTSevere Thunderstorm WarningHGXLiberty64 min
Apr 2, 2:37 PM CDTSevere Thunderstorm WarningHGXGalveston53 min
Apr 2, 4:45 PM CDTSevere Thunderstorm WarningHGXChambers60 min

Nearby

Flash Flood Warnings in Texas, 2000Every flash flood warning in 2000

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.