Alert archive / Texas / Flash Flood Warnings in 2004
Flash Flood Warning 335, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Oct 23, 2004, 3:46 AM CDT for Blanco 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 as issued.
The facts
- Issued
- Oct 23, 2004, 3:46 AM CDT (08:46 UTC)
- Expired
- Oct 23, 2004, 6:45 AM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Counties, with a storm outline in the text
County Blanco County, TX
The radar
The Austin/San Antonio radar (KEWX), 65 km from the middle of the area, began a volume at 08:47 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Del Rio, TX (KDRT), launched 00:00Z, 8.8 hours before the alert went out and 246 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
- 1809 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 1228 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- -23 m²/s²
- 0-3 km storm-relative helicity
- -21 m²/s²
- Significant tornado parameter
- -0.6
- Supercell composite
- -3.2
The text
As transmitted, in the capitals the NWS used until 2016.
000
WGUS54 KEWX 230846
FFWSAT
TXC031-231145-
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
346 AM CDT SAT OCT 23 2004
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
BLANCO
* UNTIL 645 AM CDT
* AT 342 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
VERY HEAVY RAIN FROM THUNDERSTORMS OVER THE WARNED AREA.
* LOCATIONS IN THE WARNING INCLUDE JOHNSON CITY.
HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...
COUNTRY ROADS...AND FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND. DO NOT STAY IN FLOOD PRONE AREAS.
LAT...LON 3016 9859 2996 9842 3006 9831 3028 9824
3030 9859
$$1 follow-up statement
000
WGUS74 KEWX 231141
FFSSAT
TXC031-231150-
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
640 AM CDT SAT OCT 23 2004
...THE FLASH FLOOD WARNING FOR BLANCO COUNTY EXPIRES AT 645 AM CDT...
HEAVY RAIN HAS MOVED EAST OF BLANCO COUNTY AND VERY LITTLE
ADDITIONAL RAIN IS EXPECTED.
LAT...LON 3016 9859 2996 9842 3006 9831 3028 9824
3030 9859
$$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 Austin/San Antonio, TX wrote its last area forecast discussion before this flash flood warning went out at Oct 23, 2:42 AM CDT, 1 hour 4 minutes earlier.
Area forecast discussion, Oct 23, 2:42 AM CDT, 1 hour 4 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 242 AM CDT SAT OCT 23 2004 .DISCUSSION... STRONG MID-UPPER TROF POISED ALONG TX-NM BORDER EARLY THIS MORNING WITH SIGNIFICANT COLD AIR ALOFT BEHIND IT. LITTLE IN WAY OF A SURFACE FRONTAL FEATURE IS NOTED. IN SC TX...LINE OF STORMS MOVING ENEWD THRU AREA HAS WEAKENED INTO BROAD AREA OF LIGHT TO MODERATE RAIN. EXPECT THE PRECIP TO CONTINUE EWD...POSSIBLY FORMING A WEAK RAIN- COOLED BOUNDARY ALONG AND JUST NORTH OF IH10 FOR THE AFTN HEATING TO WORK ON. HEATING WILL BE LIMITED BY CLOUDS FROM THE DEEP LOW LEVEL MOISTURE...PW VALUES ARE 1.6 TO 1.9 TODAY...AND HIGH CLOUD FROM THE RIGHT REAR QUAD OF A H3 JET. BOTH GFS AND ETA FIT WELL WITH CURRENT RAIN PATTERN AND MOVEMENT OF UPPER TROF EWD THIS AM...BUT SPLIT ON THE AFTN FCST. AT THIS TIME... PREFER GFS WITH RAIN PRETTY MUCH CONFINED TO NERN COUNTIES THIS AFTN AND LITTLE TO WEST OR SOUTH. STABILIZING CONDITIONS BEHIND THE EARLY MORNING PRECIP AGREE WITH THE GFS ON SCATTERED STORMS WITH LESS INTENSITY AND COVERAGE FOR THE REST OF THIS MORNING AND AFTN. WILL ALLOW FF WATCH TO EXPIRE AT 6 AM THIS MORNING. A SOUTHERLY LOW LEVEL FLOW WILL RE-ESTABLISH ITSELF ACROSS SC TX THIS AFTN INTO TONITE. WILL PLACE LOW POPS ACROSS AREA TONIGHT. GFS INDICATES ANOTHER AREA OF LIFT ACROSS CENTRAL AND NORTH SECTIONS ON SUN...MAINLY THRU THE AFTN PERIOD. HAVE LOWERED TEMPS A DEGREE OR TWO IN VIEW OF INCREASED CLOUDS AND CONCENTRATED THE PRECIP ALONG AND JUST EAST OF IH35 CORRIDOR. WITH NO SIGNFICANT AIRMASS CHANGES FROM SUN INTO THE FIRST OF NEXT WEEK...CONTINUED WITH LOW POPS AND ABOVE NORMAL HIGHS EACH DAY. && .PRELIMINARY POINT TEMPS/POPS... AUSTIN CAMP MABRY 85 68 87 69 / 40 30 30 20 AUSTIN BERGSTROM INTL AIRPORT 84 68 87 67 / 40 30 30 20 DEL RIO INTL AIRPORT 83 68 85 67 / 30 30 40 20 SAN ANTONIO INTL AIRPORT 86 70 88 68 / 40 30 30 20 && .EWX WATCHES/WARNINGS/ADVISORIES...FLASH FLOOD WATCH NE COUNTIES TIL 6 AM. && 09/11
Hazardous weather outlook, Oct 22, 3:24 PM CDT, 12 hours 22 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 324 PM CDT FRI OCT 22 2004 TXZ171>173-183>194-202>209-217>225-228-231100- ATASCOSA-BANDERA-BASTROP-BEXAR-BLANCO-BURNET-CALDWELL-COMAL-DE WITT- DIMMIT-EDWARDS-FAYETTE-FRIO-GILLESPIE-GONZALES-GUADALUPE-HAYS-KARNES- KENDALL-KERR-KINNEY-LAVACA-LEE-LLANO-MAVERICK-MEDINA-REAL-TRAVIS- UVALDE-VAL VERDE-WILLIAMSON-WILSON-ZAVALA- 324 PM CDT FRI OCT 22 2004 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS. .DAY ONE... A FLOOD WATCH FOR FLASH FLOODING IS IN EFFECT UNTIL 6 AM SATURDAY FOR MOST OF THE HILL COUNTRY AND INTERSTATE 35 CORRIDOR. THE FLASH FLOOD WATCH IS ALONG AND NORTHEAST OF A LINE FROM ROCKSPRINGS TO UVALDE TO SAN ANTONIO TO TAYLOR. SHOWERS AND THUNDERSTORMS WILL INCREASE THIS EVENING AND CONTINUE OVERNIGHT. MOIST GULF AIR AND A SLOW MOVING COLD FRONT WILL FOCUS THE STORMS MAINLY OVER THE HILL COUNTRY AND ALONG THE INTERSTATE 35 CORRIDOR. RAINFALL AMOUNTS WILL AVERAGE ONE TO TWO INCHES...BUT SOME SPOTS COULD RECEIVE UP TO FOUR INCHES BY DAYBREAK SATURDAY. SOME OF THE THUNDERSTORMS MAY ALSO BE SEVERE THIS EVENING WITH DAMAGING WINDS AND LARGE HAIL. THE PRIMARY THREAT AREA FOR SEVERE STORMS WILL BE WEST OF INTERSTATE 35 FROM GEORGETOWN TO SAN ANTONIO...AND NORTH OF INTERSTATE 10 FROM SAN ANTONIO TO MOUNTAIN HOME. THE MAIN THREAT TIME FOR SEVERE STORMS WILL BE FROM 5 PM TO MIDNIGHT TONIGHT. .DAYS TWO THROUGH SEVEN... NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE REQUIRED.
In the hours before
Local storm report, Oct 23, 1:31 AM CDT, 2 hours 15 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
131 AM CDT SAT OCT 23 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0128 AM FLOOD 10 N MEDINA 29.94N 99.25W
10/23/2004 KERR TX EMERGENCY MNGR
AUTOMOBILE WASHED OFF THE ROAD AT BENTON CREEK NEAR
HIGHWAY 16. NUMEROUS ROADS CLOSED. OBSERVER MEASURED 5
INCHES OF RAINFALL.
&&
PMThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 22, 9:58 PM CDT | Severe Thunderstorm Warning | EWX | Llano | 47 min |
| Oct 22, 10:37 PM CDT | Severe Thunderstorm Warning | EWX | Burnet | 53 min |
| Oct 23, 12:03 AM CDT | Flash Flood Warning | EWX | Bandera | 3 hr |
| Oct 23, 12:42 AM CDT | Flash Flood Warning | EWX | Kendall | 3 hr |
| Oct 23, 1:10 AM CDT | Flash Flood Warning | EWX | Kerr | 2 hr |
| Oct 23, 3:37 AM CDT | Flash Flood Warning | EWX | Kendall | 3 hr |
| Oct 23, 5:25 AM CDT | Flash Flood Warning | EWX | Comal, Hays | 3 hr |
| Oct 23, 6:25 AM CDT | Flash Flood Warning | EWX | Kendall | 2 hr |
| Oct 23, 8:18 AM CDT | Flash Flood Warning | EWX | Caldwell, Gonzales, Guadalupe | 3 hr |
| Oct 23, 10:26 AM CDT | Flash Flood Warning | EWX | Fayette, Lavaca | 3 hr |
| Oct 23, 4:50 PM CDT | Severe Thunderstorm Warning | EWX | Atascosa | 55 min |
| Oct 23, 5:45 PM CDT | Severe Thunderstorm Warning | EWX | Atascosa | 45 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; radar from the NEXRAD Level II archive.