Alert archive / Texas / Flash Flood Warnings in 2012
Flash Flood Warning 51, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jul 15, 2012, 7:29 PM CDT for Williamson County, Texas. It was in force for 2 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
- Jul 15, 2012, 7:29 PM CDT (00:29 UTC)
- Expired
- Jul 15, 2012, 9:30 PM CDT
- In force
- 2 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Emergency
- Flash flood emergency
- Flood severity
- None
County Williamson County, TX
The radar
The Ft Hood radar (KGRK), 40 km from the middle of the area, began a volume at 00:29 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 |
|---|---|---|---|
| Jul 15, 7:45 PM CDT | FLASH FLOOD | Round Rock, TX | EMERGENCY MANAGER REPORTED NUMEROUS ROADS CLOSED IN ROUND ROCK DUE TO FLOODING. HOME EVACUATIONS AND HIGH WATER RESCUES OCCURRING |
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, 0.5 hours before the alert went out and 263 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
- 526 J/kg
- Mixed-layer CIN
- -113 J/kg
- Mixed-layer LCL
- 1333 m above ground
- 0-6 km bulk shear
- 14 kt
- 0-1 km storm-relative helicity
- -32 m²/s²
- 0-3 km storm-relative helicity
- -26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
715
WGUS54 KEWX 160029
FFWEWX
TXC491-160230-
/O.NEW.KEWX.FF.W.0051.120716T0029Z-120716T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
729 PM CDT SUN JUL 15 2012
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTH CENTRAL WILLIAMSON COUNTY...
* UNTIL 930 PM CDT.
* AT 727 PM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED
FLASH FLOODING ACROSS THE WARNED AREA. DOPPLER RADAR ESTIMATES
THAT 3 TO 5 INCHES OF RAINFALL HAS OCCURRED AND AN ADDITIONAL 1 TO
2 INCHES ARE POSSIBLE. THE EMERGENCY MANAGER HAS REPORTED SEVERE
FLOODING IN SOUTHWEST WILLIAMSON COUNTY ALONG WITH EVACUATIONS IN
ROUND ROCK NEAR BRUSHY CREEK.
THIS IS A FLASH FLOOD EMERGENCY FOR ROUND ROCK NEAR BRUSHY CERRK.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN WATER COVERS THE ROAD...TURN AROUND DON'T DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
&&
LAT...LON 3054 9763 3048 9765 3048 9768 3046 9770
3044 9776 3045 9780 3055 9775
$$1 follow-up statement
118
WGUS74 KEWX 160228
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
928 PM CDT SUN JUL 15 2012
TXC491-160235-
/O.EXP.KEWX.FF.W.0051.000000T0000Z-120716T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WILLIAMSON TX-
928 PM CDT SUN JUL 15 2012
...THE FLASH FLOOD WARNING WILL EXPIRE AT 930 PM CDT FOR SOUTH
CENTRAL WILLIAMSON COUNTY...
THE FLASH FLOOD WARNING WILL BE ALLOWED TO EXPIRE. FM 685 AT BRUSHY
CREEK REMAINS CLOSED DUE TO HIGH WATER. LIGHT TO MODERATE SHOWERS ARE
STILL POSSIBLE FOR THE NEXT COUPLE OF HOURS BUT EXPECTED ADDITIONAL
RAINFALL AMOUNTS WILL NOT CAUSE ADDITIONAL FLOODING THIS EVENING.
LAT...LON 3054 9763 3048 9765 3048 9768 3046 9770
3044 9776 3045 9780 3055 9775
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 7:39 PM CDT | Areal Flood Advisory | EWX | Hays | 111 min |
| Jul 15, 7:56 PM CDT | Areal Flood Advisory | EWX | Bastrop, Travis | 2 hr |
| Jul 15, 8:21 PM CDT | Flash Flood Warning | EWX | Travis | 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.