Alert archive / Texas / Flash Flood Warnings in 2004
Flash Flood Warning 372, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Nov 20, 2004, 12:13 PM CST for Travis County, Texas. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Nov 20, 2004, 12:13 PM CST (18:13 UTC)
- Expired
- Nov 20, 2004, 2:15 PM CST
- In force
- 2 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Counties, with a storm outline in the text
County Travis County, TX
The nearest sounding before it
Fort Worth, TX (KFWD), launched 12:00Z, 6.2 hours before the alert went out and 287 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
- 36 J/kg
- Mixed-layer CIN
- -119 J/kg
- Mixed-layer LCL
- 895 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 91 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS54 KEWX 201815 FFWEWX TXC453-202015- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1213 PM CST SAT NOV 20 2004 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES... TRAVIS * UNTIL 215 PM CST * AT 1210 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN FROM A THUNDERSTORM OVER THE WARNED AREA. * LOCATIONS IN THE WARNING INCLUDE WEST LAKE HILLS...ROLLINGWOOD... MANSFIELD DAM...MANOR...BEE CAVE AND AUSTIN. THUNDERSTORMS WITH HEAVY RAIN OF 1 TO 2 INCHES WILL CAUSE FLASH FLOODING ACROSS THE AUSTIN AREA OVER THE NEXT COUPLE HOURS AS THE STORMS TRAIN NORTHEASTWARD AT 25 MPH. SOME PEA SIZE HAIL CAN ALSO BE EXPECTED. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND. DO NOT STAY IN FLOOD PRONE AREAS. MOTORISTS SHOULD USE EXTREME CAUTION DUE TO RISING WATERS OVER ROADS AND LOW WATER CROSSINGS. LAT...LON 3028 9798 3006 9774 3040 9745 3044 9796 $$
1 follow-up statement
000 WGUS74 KEWX 201945 FFSEWX TXC453-202015- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 145 PM CST SAT NOV 20 2004 ...A FLASH FLOOD WARNING CONTINUES UNTIL 215 PM CST FOR TRAVIS COUNTY... AT 142 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE SHOWERS WITH LOCALLY HEAVY RAIN MOVING NORTHEEAST OVER THE WARNED AREA. THE SHOWERS HAVE DECREASING IN INTENSITY...HOWEVER RUNOFF AND FLOODING WILL CONTINUE. HEAVY RAINFALL WILL CAUSE FLASH FLOODING OVER SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS...UNDERPASSES AND POORLY DRAINED AREAS. LAT...LON 3028 9798 3006 9774 3040 9745 3044 9796 $$
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 20, 2:54 PM CST | Severe Thunderstorm Warning | EWX | Burnet | 21 min |
| Nov 20, 4:36 PM CST | Flash Flood Warning | EWX | DeWitt | 114 min |
| Nov 20, 5:12 PM CST | Flash Flood Warning | EWX | Lavaca | 3 hr |
| Nov 20, 5:59 PM CST | Severe Thunderstorm Warning | EWX | Lavaca | 61 min |
Nearby
Flash Flood Warnings in Texas, 2004Every flash flood warning in 2004
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.