Alert archive / Texas / Flash Flood Warnings in 2012
Flash Flood Warning 57, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Aug 19, 2012, 2:56 AM CDT for Medina 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
- Aug 19, 2012, 2:56 AM CDT (07:56 UTC)
- Expired
- Aug 19, 2012, 6:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
County Medina County, TX
The radar
The Laughlin AFB radar (KDFX), 116 km from the middle of the area, began a volume at 07:56 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 |
|---|---|---|---|
| Aug 19, 5:30 AM CDT | FLASH FLOOD | 5 E Hondo, TX | SEVERAL ROADS CLOSED THROUGH-OUT THE COUNTY... INCLUDING CR471 AND CR741. |
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 (KDLF), launched 00:00Z, 7.9 hours before the alert went out and 171 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
- 31 J/kg
- Mixed-layer CIN
- -47 J/kg
- Mixed-layer LCL
- 2533 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 26 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
493
WGUS54 KEWX 190756
FFWEWX
TXC325-191100-
/O.NEW.KEWX.FF.W.0057.120819T0756Z-120819T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
256 AM CDT SUN AUG 19 2012
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
SOUTHERN MEDINA COUNTY...
* UNTIL 600 AM CDT.
* AT 253 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
DETERMINED THAT RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE SLOW
MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE CENTRAL
AND SOUTHERN PORTIONS OF MEDINA COUNTY...ESPECIALLY ACROSS
THE YANCEY AND BIRY CITIES. EXPECT ONE TO TWO INCHES OF RAINFALL
AMOUNTS WITHIN THE NEXT HOUR.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
DEVINE...HONDO...BADER...BIRY...D'HANIS...DUNLAY...NATALIA...NEW
FOUNTAIN...NOONAN...PEARSON...QUIHI AND YANCEY.
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 2910 9927 2931 9937 2948 9896 2920 9884
2910 9883 2910 9906
$$1 follow-up statement
599
WGUS74 KEWX 191024
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
524 AM CDT SUN AUG 19 2012
TXC325-191100-
/O.CON.KEWX.FF.W.0057.000000T0000Z-120819T1100Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MEDINA TX-
524 AM CDT SUN AUG 19 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 600 AM CDT FOR
CENTRAL MEDINA COUNTY...
AT 519 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT SCATTERED SHOWERS AND NEARBY THUNDERSTORMS FROM SOUTHERN
MEDINA COUNTY AREA. AT THIS TIME...MOST OF THE INTENSE THUNDERSTORMS
WITH HEAVY RAINS HAVE MOVED AWAY FROM SOUTHERN MEDINA COUNTY. EXPECT
THIS TREND TO CONTINUE FOR THE NEXT FEW HOURS.
LOCATIONS IN THE WARNING AREA INCLUDE BIRY...BADER...QUIHI...NEW
FOUNTAIN...DUNLAY...PEARSON...NOONAN...HONDO AND D'HANIS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN WATER COVERS THE ROAD...TURN AROUND DON'T DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD
WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS.
&&
LAT...LON 2910 9927 2931 9937 2948 9896 2920 9884
2910 9883 2910 9906
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 18, 9:18 PM CDT | Areal Flood Advisory | EWX | Guadalupe | 2 hr |
| Aug 18, 10:01 PM CDT | Areal Flood Advisory | EWX | Williamson | 119 min |
| Aug 18, 10:14 PM CDT | Areal Flood Advisory | EWX | Bexar | 106 min |
| Aug 18, 10:28 PM CDT | Areal Flood Advisory | EWX | Travis | 2 hr |
| Aug 18, 10:45 PM CDT | Flash Flood Warning | EWX | Travis, Williamson | 105 min |
| Aug 18, 11:32 PM CDT | Flash Flood Warning | EWX | Bexar | 118 min |
| Aug 18, 11:40 PM CDT | Areal Flood Advisory | EWX | Bastrop, Lee | 110 min |
| Aug 18, 11:50 PM CDT | Areal Flood Advisory | EWX | Caldwell, Gonzales, Guadalupe | 2 hr |
| Aug 19, 12:26 AM CDT | Areal Flood Advisory | EWX | Gillespie | 2 hr |
| Aug 19, 12:50 AM CDT | Areal Flood Advisory | EWX | Bandera, Frio, Medina, Uvalde, Zavala | 100 min |
| Aug 19, 1:16 AM CDT | Areal Flood Advisory | EWX | Fayette | 104 min |
| Aug 19, 1:30 AM CDT | Areal Flood Advisory | EWX | Bexar, Kendall | 2 hr |
| Aug 19, 2:00 AM CDT | Flash Flood Warning | EWX | Bexar | 3 hr |
| Aug 19, 4:00 AM CDT | Areal Flood Advisory | EWX | Atascosa | 2 hr |
| Aug 19, 4:54 AM CDT | Areal Flood Advisory | EWX | Wilson | 2 hr |
| Aug 19, 5:12 AM CDT | Flash Flood Warning | EWX | Bexar | 3 hr |
| Aug 19, 5:40 AM CDT | Areal Flood Advisory | EWX | Zavala | 110 min |
| Aug 19, 8:33 AM CDT | Areal Flood Advisory | EWX | Bexar | 117 min |
| Aug 19, 10:25 AM CDT | River Flood Warning | EWX | Bexar | 69 min |
| Aug 19, 11:05 AM CDT | River Flood Warning | EWX | Bexar, Wilson | 22 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.