Alert archive / Texas / Flash Flood Warnings in 2000
Flash Flood Warning 3, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at May 4, 2000, 1:30 PM CDT for Liberty County, Polk County, San Jacinto County, Texas. It was in force for 5 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
- May 4, 2000, 1:30 PM CDT (18:30 UTC)
- Expired
- May 4, 2000, 6:00 PM CDT
- In force
- 5 hr
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Liberty County, TX, Polk County, TX, San Jacinto County, TX
The radar
The Houston radar (KHGX), 120 km from the middle of the area, began a volume at 18:30 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
Lake Charles Mun, LA (KLCH), launched 12:00Z, 6.5 hours before the alert went out and 176 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.
- Mixed-layer CAPE
- 1094 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 606 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 47 m²/s²
- 0-3 km storm-relative helicity
- 105 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.9
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS54 KHGX 041829
FFWHGX
TXC291-373-407-042300-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
130 PM CDT THU MAY 4 2000
THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON TX HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SAN JACINTO COUNTY IN SOUTHEAST TEXAS
POLK COUNTY IN SOUTHEAST TEXAS
LIBERTY COUNTY IN SOUTHEAST TEXAS
* UNTIL 600 PM CDT
* AT 110 PM CDT...THE SAN JACINTO COUNTY SHERIFF REPORTED 2 FEET OF
WATER ON US HIGHWAY 59 NEAR SHEPHERD. AN ADDITIONAL 2 TO 4 INCHES
OF RAIN IS POSSIBLE BY 4 PM.
* FLOODING IS EXPECTED IN OR NEAR...
AMES...CLEVELAND...COLDSPRING...CORRIGAN...SHEPHERD...LIVINGSTON
CORRIGAN...RYE...LIBERTY...DAYTON
FLASH FLOODING IS IMMINENT OR OCCURRING IN SMALL CREEKS...STREAMS...
BAYOUS AND ADJACENT FARMLAND.
DO NOT CROSS ANY LOCATION WHERE WATER COVERS THE ROAD!
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 3108 9475 2998 9449 2995 9496 3042 9520
3048 9535 3082 9524
&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 May 4, 9:45 AM CDT, 3 hours 45 minutes earlier.
Area forecast discussion, May 4, 9:45 AM CDT, 3 hours 45 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 945 AM CDT THU MAY 4 2000 SHORT UPDATE DUE TO IMPENDING HEAVY WEATHER. WILL ISSUE FLASH FLOOD WATCH FOR LOCATIONS ALONG/NORTH OF I-10. MANY OF THE CLASSIC FACTORS ARE IN PLACE SUCH AS WEAK MID LEVEL FLOW...STATIONARY BOUNDARY... AMPLE MOIST AIR...AND ALREADY SATURATED GROUND. IN ADDITION...THE SEA BREEZE APPEARS TO BE ACTIVE AGAIN TODAY OVER THE SRN ZONES...IT COULD COLLIDE WITH OUTFLOW FROM THE LINE OF STORMS TO THE NORTH AND REALLY SQUEEZE OUT SOME HEAVY AMOUNTS IN METRO HOUSTON. WILL ALSO MAKE CHANGES TO TEMPS/WINDS/CLOUDS REFLECTING EXPECTED CONVECTIVE COVERAGE (E.G. COOLER WHERE IT IS LIKELY TO RAIN ALL DAY). .KHGX...FLASH FLOOD WATCH ALONG/NORTH OF I-10. 31/47 UPDATED PRELIMS... CLL TE 080/068 087/068 087 +34 IAH TE 085/070 087/070 087 733 GLS EB 081/072 081/072 081 422
In the hours before
Special weather statement, May 4, 11:35 AM CDT, 1 hour 55 minutes before
TXZ163-164-176>179-195>200-210>214-226-227-235>237-050000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 1135 AM CDT THU MAY 4 2000 ...MODERATE RISK OF SEVERE THUNDERSTORMS AND HEAVY RAIN THIS AFTERNOON AND EARLY EVENING ACROSS SOUTHEAST TEXAS... ...FLASH FLOOD WATCH IN EFFECT ALONG AND NORTH OF A BRENHAM... CONROE...LIVINGSTON LINE THROUGH 7 PM... THERE IS A MODERATE RISK OF SEVERE THUNDERSTORMS AND HEAVY RAIN ACROSS SOUTHEAST TEXAS THIS AFTERNOON AND EARLY EVENING. THE PRIMARY SEVERE WEATHER RISKS ARE LARGE HAIL AND DAMAGING WIND. THE PRIMARY THREAT TIME IS FROM NOON THROUGH 7 PM. HEAVY RAIN IS MOST LIKELY ALONG AND NORTH OF STATE HIGHWAY 105. A SLOW MOVING UPPER LEVEL SYSTEM...STATIONARY FRONT...AND MOIST GULF AIR WILL COMBINE TO PRODUCE SHOWERS AND THUNDERSTORMS ACROSS SOUTHEAST TEXAS TODAY. WIND SHEAR IS SUFFICIENT FOR SOME OF THE STORMS TO BECOME SEVERE AND PRODUCE LARGE HAIL OR DAMAGING WINDS. MID-LEVEL WINDS APPEAR TO FAVOR STORMS THAT MOVE SLOWLY AND OVER THE SAME LOCATIONS...WHICH WILL RESULT IN HEAVY RAIN. EXPECT AVERAGE RAINFALL TOTALS OF 1 TO 2 INCHES NORTH OF STATE HIGHWAY 105...WITH SOME LOCATIONS RECEIVING UP TO 4 INCHES OF RAIN BY EARLY EVENING. EXPECT AVERAGE RAINFALL AMOUNTS OF 1/2 TO 1 INCH FOR METRO HOUSTON... WITH SOME SPOTS RECEIVING UP TO 2 INCHES OF RAIN. STAY TUNED TO NOAA WEATHER RADIO AND LOCAL MEDIA TODAY FOR THE LATEST FORECASTS...UPDATES...AND POSSIBLE WATCHES OR WARNINGS. 31/JWZ
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 4, 1:03 AM CDT | Severe Thunderstorm Warning | HGX | Houston | 42 min |
| May 4, 1:08 PM CDT | Severe Thunderstorm Warning | HGX | Liberty | 37 min |
| May 4, 1:25 PM CDT | Severe Thunderstorm Warning | HGX | San Jacinto | 65 min |
| May 4, 1:38 PM CDT | Severe Thunderstorm Warning | HGX | Montgomery | 52 min |
| May 4, 1:44 PM CDT | Tornado Warning | HGX | Liberty | 46 min |
| May 4, 2:08 PM CDT | Severe Thunderstorm Warning | HGX | Grimes | 52 min |
| May 4, 2:24 PM CDT | Severe Thunderstorm Warning | HGX | Harris, Liberty | 51 min |
| May 4, 3:00 PM CDT | Severe Thunderstorm Warning | HGX | Grimes | 45 min |
| May 4, 3:15 PM CDT | Severe Thunderstorm Warning | HGX | Burleson, Washington | 60 min |
| May 4, 3:37 PM CDT | Severe Thunderstorm Warning | HGX | Harris | 53 min |
| May 4, 3:50 PM CDT | Flash Flood Warning | HGX | Brazos, Grimes, Montgomery, Washington | 3 hr |
| May 4, 4:13 PM CDT | Severe Thunderstorm Warning | HGX | Washington | 62 min |
| May 4, 4:30 PM CDT | Severe Thunderstorm Warning | HGX | Harris | 45 min |
| May 4, 4:30 PM CDT | Severe Thunderstorm Warning | HGX | Austin, Waller | 60 min |
| May 4, 4:57 PM CDT | Severe Thunderstorm Warning | HGX | Houston | 48 min |
| May 4, 5:12 PM CDT | Severe Thunderstorm Warning | HGX | Colorado | 63 min |
| May 4, 5:32 PM CDT | Severe Thunderstorm Warning | HGX | Austin | 43 min |
| May 4, 5:33 PM CDT | Severe Thunderstorm Warning | HGX | Chambers, Harris | 42 min |
| May 4, 5:36 PM CDT | Severe Thunderstorm Warning | HGX | Liberty | 24 min |
| May 4, 5:40 PM CDT | Severe Thunderstorm Warning | HGX | Waller | 50 min |
| May 4, 6:15 PM CDT | Severe Thunderstorm Warning | HGX | Chambers | 45 min |
| May 4, 6:35 PM CDT | Severe Thunderstorm Warning | HGX | Colorado | 55 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; radar from the NEXRAD Level II archive.