Alert archive / Texas / Flash Flood Warnings in 2012
Flash Flood Warning 16, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Feb 17, 2012, 11:05 PM CST for Burnet County, Llano County, Texas. It was in force for 3 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 17, 2012, 11:05 PM CST (05:05 UTC)
- Expired
- Feb 18, 2012, 2:00 AM CST
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Burnet County, TX, Llano County, TX
The radar
The Ft Hood radar (KGRK), 100 km from the middle of the area, began a volume at 05:06 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, 1:50 AM CST | FLASH FLOOD | Llano, TX | ROAD CLOSURES DUE TO HIGH WATER... WEST SANDSTONE RD... RR 2323 3 MI SOUTHWEST OF LLANO |
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, 5.1 hours before the alert went out and 244 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.
324
WGUS54 KEWX 180505
FFWEWX
TXC053-299-180800-
/O.NEW.KEWX.FF.W.0016.120218T0505Z-120218T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1105 PM CST FRI FEB 17 2012
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
BURNET COUNTY...
LLANO COUNTY...
* UNTIL 200 AM CST.
* AT 1103 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
DETERMINED THAT RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE SLOW
MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED
AREA. RADAR ESTIMATES SHOW RAINFALL UP TO ONE AND ONE HALF INCHES
OVER THE CENTRAL PORTIONS OF LLANO AND BURNET COUNTIES. AN
ADDITIONAL ONE TO TWO INCHES IS LIKELY BY 2 AM.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BERTRAM...BUCHANAN DAM...BURNET...KINGSLAND...LLANO...MARBLE
FALLS...BABY HEAD...BLUFFTON...GAINESVILLE...GRANITE SHOALS...
HORSESHOE BAY...INKS LAKE STATE PARK...JOPPA...LAKE VICTOR...LONE
GROVE...MEADOWLAKES...OATMEAL...OXFORD...SHADY GROVE...SMITHWICK...
STOLZ...SUNNYLANE...TOW AND WATSON.
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 3096 9789 3050 9816 3054 9876 3071 9891
3089 9874 3094 9860 3094 9845 3095 9846
3099 9845 3103 9833
$$1 follow-up statement
589
WGUS74 KEWX 180755
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
155 AM CST SAT FEB 18 2012
TXC053-299-180803-
/O.EXP.KEWX.FF.W.0016.000000T0000Z-120218T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LLANO TX-BURNET TX-
155 AM CST SAT FEB 18 2012
...THE FLASH FLOOD WARNING FOR BURNET AND LLANO COUNTIES WILL BE
ALLOWED TO EXPIRE AT 200 AM CST...
THE STRONGEST STORMS AND HEAVIEST RAINFALL HAVE MOVED OUT OF THE
WARNING AREA. HOWEVER...SCATTERED SHOWERS AND THUNDERSTORMS ARE
EXPECTED TO CONTINUE THROUGH EARLY THIS MORNING...AND MAY PRODUCE
ADDITIONAL HEAVY RAINFALL OVER AREAS WHICH ARE ALREADY SATURATED
FROM STORMS EARLIER TONIGHT.
LAT...LON 3096 9789 3050 9816 3054 9876 3071 9891
3089 9874 3094 9860 3094 9845 3095 9846
3099 9845 3103 9833
$$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 18, 12:41 AM CST | Areal Flood Advisory | EWX | Bandera, Blanco, Gillespie, Kendall, Kerr | 109 min |
| Feb 18, 1:04 AM CST | Flash Flood Warning | EWX | Travis, Williamson | 4 hr |
| 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.