Alert archive / Texas / Flash Flood Warnings in 2000
Flash Flood Warning 7, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this flash flood warning at May 19, 2000, 9:20 PM CDT for Waller 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 counties it named.
The facts
- Issued
- May 19, 2000, 9:20 PM CDT (02:20 UTC)
- Expired
- May 20, 2000, 12:15 AM CDT
- In force
- 3 hr
- Issued by
- NWS Houston/Galveston, TX
- Area
- Whole counties
County Waller County, TX
The radar
The Houston radar (KHGX), 106 km from the middle of the area, began a volume at 02:24 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 00:00Z, 2.3 hours before the alert went out and 269 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
- 701 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 1188 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -31 m²/s²
- 0-3 km storm-relative helicity
- 32 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.7
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS54 KHGX 200221 FFWHGX TXC473-200515- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 920 PM CDT FRI MAY 19 2000 THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON TX HAS ISSUED A * FLASH FLOOD WARNING FOR... WALLER COUNTY IN SOUTHEAST TEXAS * UNTIL 1215 AM CDT * AT 915 PM CDT...DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS CONTINUING TO DEVELOP ACROSS CENTRAL AND NORTHERN WALLER COUNTY FROM WALLER TO PRARIE VIEW. RAINFALL TOTALS ARE ESTIMATED AT 3 TO 4 INCHES...AND ANOTHER 3 TO 4 INCHES IS LIKELY IN THE NEXT FEW HOURS. THIS WILL LEAD TO FLOODING! * FLOODING IS EXPECTED IN OR NEAR...WALLER...PRARIE VIEW. FLOODING IS IMMINENT OR OCCURRING! MOVE TO HIGHER GROUND IMMEDIATELY! TAKE IMMEDIATE ACTION TO PROTECT YOUR LIFE AND PROPERTY IF YOU LIVE ALONG A STREAM...CREEK...OR BAYOU IN THESE AREAS. 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.
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 19, 8:46 PM CDT, 34 minutes earlier.
Area forecast discussion, May 19, 8:46 PM CDT, 34 minutes before
SOUTHEAST TEXAS FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 846 PM CDT FRI MAY 19 2000 QUITE A BIT OF RAIN FOR PARTS OF THE FA ALREADY THIS EVENING. AREAS NEAR IAH HAVE RECEIVED AT LEAST 6 OF RAIN SINCE ABOUT 5 PM AND THE APPROACH CONTROL BUILDING AT IAH REPORTED ABOUT 1 OF WATER IN THE BUILDING AT ONE POINT. MOST OF THESE HEAVY RAINS HAVE MOVED OFF AS THE JUNCTION OF CELL MERGERS HAVE ALSO MOVED OFF TO THE NE. FOR THE REMAINDER OF TONIGHT WE COULD STILL BE IN FOR A BUMPY RIDE. A N-S LINE OF STRONG/SEVERE TSRA DEVELOPING OVER SW/SC TX AS DEEP MOISTURE/SPOTTY PCPN CONTINUES TO PUSH NORTH FROM THE GULF. EVENING SOUNDINGS FROM THE AREA INDICATED A VERY WEAK CAP ALONG WITH A FAIRLY STRONG S/SELY CLIP AT THE LOWER LEVELS. AMS ALSO APPEARS QUITE UNSTABLE (-9 LI AT CRP) CLOSER TO THE COAST. IN ADDITION... THERE ARE LIKELY A LOT OF LEFT-OVER MESO BOUNDARIES AROUND THE AREA. THUS WILL EXTEND THE FFA FOR ALL OF THE CWA AND KEEP THE MENTION OF SEVERE ALL THE WAY AROUND. 41/47/30/42/48/36 .KHGX...FLASH FLOOD WATCH TONIGHT ALL SE TX. CLL TT 068/084 067/087 068 8534 IAH CE 071/085 069/087 070 8434 GLS CE 075/083 073/083 075 6434
In the hours before
Special weather statement, May 19, 3:37 PM CDT, 5 hours 43 minutes before
TXZ176-177-195>199-211-212-200300- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 337 PM CDT FRI MAY 19 2000 THE NATIONAL WEATHER SERVICE HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR NORTHWESTERN PORTIONS OF SOUTHEAST TEXAS FROM 4 PM UNTIL 10 PM. COUNTIES THE WATCH AREA INCLUDE: AUSTIN...BRAZOS...BURLESON...GRIMES...MADISON...MONTGOMERY...WALKER... WALLER...AND WASHINGTON COUNTIES. LEON...MILAM AND ROBERTSON COUNTIES IN CENTRAL TEXAS ARE ALSO INCLUDED IN THE WATCH AREA. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO OR TELEVISION STATIONS...OR YOUR CABLE TELEVISION SERVICE PROVIDER FOR LATER STATEMENTS CONCERNING THIS SEVERE WEATHER THREAT.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 7:25 PM CDT | Severe Thunderstorm Warning | HGX | Harris | 35 min |
| May 19, 8:46 PM CDT | Tornado Warning | HGX | Liberty | 59 min |
| May 19, 8:49 PM CDT | Flash Flood Warning | HGX | Harris, Liberty | 116 min |
| May 19, 10:35 PM CDT | Flash Flood Warning | HGX | Harris, Liberty, Montgomery | 100 min |
| May 19, 10:45 PM CDT | Tornado Warning | HGX | Brazoria | 45 min |
| May 19, 11:17 PM CDT | Severe Thunderstorm Warning | HGX | Liberty | 43 min |
| May 19, 11:25 PM CDT | Tornado Warning | HGX | Brazoria | 50 min |
| May 19, 11:30 PM CDT | Tornado Warning | HGX | Liberty | 30 min |
| May 19, 11:33 PM CDT | Flash Flood Warning | HGX | Brazoria | 3 hr |
| May 20, 12:00 AM CDT | Flash Flood Warning | HGX | Brazoria, Chambers, Fort Bend, Harris, Liberty, Waller and 1 more | 5 hr |
| May 20, 12:25 AM CDT | Tornado Warning | HGX | Chambers, Liberty | 65 min |
| May 20, 2:02 AM CDT | Severe Thunderstorm Warning | HGX | Galveston | 28 min |
| May 20, 2:22 AM CDT | Tornado Warning | HGX | Chambers, Galveston | 38 min |
| May 20, 4:59 AM CDT | Flash Flood Warning | HGX | Harris, Liberty | 3 hr |
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.