Alert archive / Texas / Flash Flood Warnings in 2012
Flash Flood Warning 17, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Feb 18, 2012, 1:04 AM CST for Travis County, Williamson County, Texas. It was in force for 4 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Feb 18, 2012, 1:04 AM CST (07:04 UTC)
- Expired
- Feb 18, 2012, 5:00 AM CST
- In force
- 4 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Travis County, TX, Williamson County, TX
The radar
The Ft Hood radar (KGRK), 32 km from the middle of the area, began a volume at 07:07 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Feb 18, 3:15 AM CST | FLASH FLOOD | Austin, TX | NUMEROUS ROAD CLOSURES DUE TO HIGH WATER. 5200 BLK OF JOE TANNER...5000 BLK OF WASSON RD... 6800 BLK OLD BEE CAVES RD... 10000 BLK DAVID MOORE DR. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 7.1 hours before the alert went out and 249 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1062 m above ground
- 0-6 km bulk shear
- 75 kt
- 0-1 km storm-relative helicity
- 90 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
603
WGUS54 KEWX 180704
FFWEWX
TXC453-491-181100-
/O.NEW.KEWX.FF.W.0017.120218T0704Z-120218T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
104 AM CST SAT FEB 18 2012
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
TRAVIS COUNTY...
WILLIAMSON COUNTY...
* UNTIL 500 AM CST.
* AT 100 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
NUMEROUS SHOWERS AND THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS
THE WARNED AREA.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
ANDERSON MILL...AUSTIN...AUSTIN BERGSTROM INT AP...CEDAR PARK...
GEORGETOWN...GRANGER...PFLUGERVILLE...ROUND ROCK...SERENADA...
TANGLEWOOD FOREST...TAYLOR...WINDEMERE...ANDICE...BARTLETT...BEE
CAVE...FLORENCE...GEORGETOWN DAM...GRANGER DAM...HUTTO...JARRELL...
LAGO VISTA...LAKEWAY...LEANDER...LIBERTY HILL...MANOR...MANSFIELD
DAM...MUSTANG RIDGE...ONION CREEK...ROLLINGWOOD AND SUN CITY.
THE SHOWERS AND THUNDERSTORMS WHICH WILL MOVE OVER THE AUSTIN METRO
AREA ARE EXPECTED TO CONTINUE TO PRODUCE HEAVY RAIN WHICH WILL
QUICKLY RUNOFF AND LEAD TO FLASH FLOODING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD
WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS.
&&
LAT...LON 3088 9762 3076 9730 3073 9726 3025 9749
3004 9771 3036 9814 3056 9808 3077 9795
3092 9781
$$2 follow-up statements
823
WGUS74 KEWX 180836
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
236 AM CST SAT FEB 18 2012
TXC453-491-181100-
/O.CON.KEWX.FF.W.0017.000000T0000Z-120218T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TRAVIS TX-WILLIAMSON TX-
236 AM CST SAT FEB 18 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 AM CST FOR
WILLIAMSON AND TRAVIS COUNTIES...
AT 230 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT THE HEAVIEST RAINFALL HAS MOVED OUT OF THE AUSTIN METRO AREA.
HOWEVER...SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ARE EXPECTED
TO CONTINUE THROUGH THE EARLY MORNING HOURS AND MAY PRODUCE ANOTHER
HALF OF AN INCH OR MORE OF RAINFALL. RAIN GAUGES HAVE VERIFIED THAT
AS MUCH AS OVER ONE AND A HALF INCHES OF RAIN HAS FALLEN IN AND
AROUND AUSTIN SINCE MIDNIGHT. SEVERAL AREA CREEKS AND STREAMS HAVE
RAPIDLY RISEN TO NEAR OR ABOVE BANKFULL. ADDITIONAL RAINFALL...AS
WELL AS RUNOFF...THROUGH THE NEXT FEW HOURS WILL CONTINUE TO CAUSE
RAPID RISES AND POSSIBLE FLOODING OF CREEKS AND STREAMS AND ALSO
SOME ROADS AND INTERSECTIONS.
LOCATIONS IN THE WARNING AREA INCLUDE SUN CITY...LIBERTY HILL...
WEIR...SERENADA...JARRELL...GRANGER DAM...GRANGER...GEORGETOWN DAM...
GEORGETOWN...FLORENCE...BARTLETT AND ANDICE.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
RUNOFF FROM HEAVY RAIN WILL FLOOD CREEKS, STREAMS, STREET
INTERSECTIONS, CULVERTS AND UNDERPASSES. LOW LYING PLACES THAT
NORMALLY FLOOD COULD BECOME DEATH TRAPS. DO NOT CROSS ANY FLOODED
AREA. TURN AROUND DON'T DROWN.
IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD
WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS.
&&
LAT...LON 3088 9762 3076 9730 3073 9726 3025 9749
3004 9771 3036 9814 3056 9808 3077 9795
3092 9781
$$628
WGUS74 KEWX 181055
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
455 AM CST SAT FEB 18 2012
TXC453-491-181100-
/O.EXP.KEWX.FF.W.0017.000000T0000Z-120218T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TRAVIS TX-WILLIAMSON TX-
455 AM CST SAT FEB 18 2012
...THE FLASH FLOOD WARNING FOR WILLIAMSON AND TRAVIS COUNTIES WILL
BE ALLOWED TO EXPIRE AT 500 AM CST ...
THE HEAVIEST RAINFALL HAS MOVED EAST OF THE AUSTIN METRO AREA.
SCATTERED SHOWERS WILL BRING OCCASIONAL LIGHT TO MODERATE RAIN
THROUGH THE EARLY AFTERNOON...BUT NEW RAINFALL TOTALS WILL GENERALLY
AVERAGE ONE QUARTER OF AN INCH OR LESS. EVEN THOUGH HEAVY RAINFALL
IS NO LONGER EXPECTED...RUNOFF FROM RAINFALL OVERNIGHT MAY CONTINUE
TO CAUSE MINOR FLOODING OF CREEKS AND STREAMS IN AND AROUND THE
AUSTIN METRO AREA THROUGH THE MORNING HOURS.
LAT...LON 3088 9762 3076 9730 3073 9726 3025 9749
3004 9771 3036 9814 3056 9808 3077 9795
3092 9781
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 17, 10:42 PM CST | Areal Flood Advisory | EWX | Maverick | 108 min |
| Feb 17, 10:52 PM CST | Flash Flood Warning | EWX | Bexar | 4 hr |
| Feb 17, 11:05 PM CST | Flash Flood Warning | EWX | Burnet, Llano | 3 hr |
| Feb 18, 12:41 AM CST | Areal Flood Advisory | EWX | Bandera, Blanco, Gillespie, Kendall, Kerr | 109 min |
| Feb 18, 7:28 AM CST | Areal Flood Advisory | EWX | Bexar | 2 hr |
| Feb 18, 8:34 AM CST | Areal Flood Advisory | EWX | Bastrop, Caldwell, Comal, Hays, Travis | 116 min |
| Feb 18, 9:03 AM CST | Areal Flood Advisory | EWX | Fayette | 117 min |
| Feb 18, 10:02 AM CST | Areal Flood Advisory | EWX | Williamson | 118 min |
| Feb 18, 11:20 AM CST | Areal Flood Advisory | EWX | Bastrop | 2 hr |
| Feb 18, 3:54 PM CST | Areal Flood Advisory | EWX | Bastrop | 2 hr |
Nearby
Flash Flood Warnings in Texas, 2012Every flash flood warning in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.