Alert archive / Texas / Flash Flood Warnings in 2012
Flash Flood Warning 61, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Sep 28, 2012, 8:21 PM CDT for Maverick 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
- Sep 28, 2012, 8:21 PM CDT (01:21 UTC)
- Expired
- Sep 28, 2012, 11:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
County Maverick County, TX
The radar
The Laughlin AFB radar (KDFX), 30 km from the middle of the area, began a volume at 01:21 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 |
|---|---|---|---|
| Sep 28, 8:45 PM CDT | FLASH FLOOD | 18 Sse Spofford, TX | WATER OVER THE ROAD 10 MILES NORTHEAST FROM THE JUNCTION OF FM481 AND HWY 57. TXDOT IN THE PROCESS OF BARRICADING ROAD. WATER FROM ELM CREEK IS OVERFLOWING THE ROAD BUT IS STILL PASSABLE AT THIS TIME. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Del Rio, TX (KDRT), launched 00:00Z, 1.4 hours before the alert went out and 71 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
- 933 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 522 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 177 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 2.9
The text
As transmitted, in the capitals the NWS used until 2016.
493 WGUS54 KEWX 290121 FFWEWX TXC323-290430- /O.NEW.KEWX.FF.W.0061.120929T0121Z-120929T0430Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 821 PM CDT FRI SEP 28 2012 THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR... MAVERICK COUNTY... * UNTIL 1130 PM CDT. * AT 818 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE DETERMINED THAT RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. RAINFALL TOTALS OF 6 TO 8 INCHES ARE POSSIBLE. * RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO OCCUR. RAINFALL ESTIMATES FROM DOPPLER RADAR ARE 3 TO 4 INCHES IN THE PAST THREE HOURS. THE ELM AND MULA CREEK BASINS WILL SEE RAPID RISES FROM THIS HEAVY RAINFALL. 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 2908 10030 2906 10014 2887 10014 2893 10035 $$
1 follow-up statement
524 WGUS74 KEWX 290157 FFSEWX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 857 PM CDT FRI SEP 28 2012 TXC323-290430- /O.CON.KEWX.FF.W.0061.000000T0000Z-120929T0430Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ MAVERICK TX- 857 PM CDT FRI SEP 28 2012 ...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1130 PM CDT FOR MAVERICK COUNTY... AT 852 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO DETECT SHOWERS PRODUCING LIGHT TO MODERATE RAINFALL OVER THE WARNED AREA. ANY ADDITIONAL RAINFALL WILL BE LESS THAN ONE INCH. PRECAUTIONARY/PREPAREDNESS ACTIONS... THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES... ELM CREEK...PALO BLANCO CREEK...MULA CREEK...CHILIPITIN CREEK... SALADO CREEK...CHAPARROSA CREEK...STRICKLIN CREEK AND CHACON CREEK. RUNOFF WILL LIKELY BE GREATEST ACROSS THE MULA AND ELM CREEK BASINS. IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS. && LAT...LON 2908 10030 2906 10014 2887 10014 2893 10035 $$
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 28, 7:30 PM CDT | Areal Flood Advisory | EWX | Maverick | 2 hr |
| Sep 28, 9:19 PM CDT | Areal Flood Advisory | EWX | Bexar, Comal, Guadalupe | 2 hr |
| Sep 28, 10:29 PM CDT | Flash Flood Warning | EWX | Zavala | 3 hr |
| Sep 28, 10:41 PM CDT | Flash Flood Warning | EWX | Dimmit | 3 hr |
| Sep 29, 12:14 AM CDT | Areal Flood Advisory | EWX | Bexar | 3 hr |
| Sep 29, 12:29 AM CDT | Special Weather Statement | EWX | Frio | 61 min |
| Sep 29, 12:53 AM CDT | Areal Flood Advisory | EWX | Frio, Zavala | 2 hr |
| Sep 29, 1:21 AM CDT | Flash Flood Warning | EWX | Frio, Zavala | 3 hr |
| Sep 29, 2:23 AM CDT | Special Weather Statement | EWX | Atascosa | 67 min |
| Sep 29, 3:01 AM CDT | Areal Flood Advisory | EWX | Bexar | 119 min |
| Sep 29, 4:37 AM CDT | Areal Flood Advisory | EWX | Travis, Williamson | 113 min |
| Sep 29, 5:44 AM CDT | Areal Flood Advisory | EWX | Bexar, Guadalupe, Wilson | 106 min |
| Sep 29, 12:53 PM CDT | River Flood Warning | EWX | Val Verde | 8 hr |
| Sep 29, 3:33 PM CDT | Areal Flood Advisory | EWX | Karnes | 117 min |
| Sep 29, 4:57 PM CDT | Areal Flood Advisory | EWX | Gonzales, Lavaca | 2 hr |
| Sep 29, 6:38 PM CDT | Areal Flood Advisory | EWX | Lavaca | 112 min |
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.