Alert archive / Texas / Flash Flood Warnings in 2012
Flash Flood Warning 53, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jul 18, 2012, 3:32 PM CDT for Atascosa County, Bexar County, Texas. It was in force for 118 min. 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 18, 2012, 3:32 PM CDT (20:32 UTC)
- Expired
- Jul 18, 2012, 5:30 PM CDT
- In force
- 118 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Flood severity
- None
Counties Atascosa County, TX, Bexar County, TX
The radar
The Austin/San Antonio radar (KEWX), 66 km from the middle of the area, began a volume at 20:35 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 18, 4:30 PM CDT | FLASH FLOOD | San Antonio, TX | LAW ENFORCMENT REPORTS FLASH FLOOD ON SOUTH FLORES STREET WITH HIGH WATER RESCUE IN PROGRESS |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 8.5 hours before the alert went out and 217 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
- 3410 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 660 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
009
WGUS54 KEWX 182032
FFWEWX
TXC013-029-182230-
/O.NEW.KEWX.FF.W.0053.120718T2032Z-120718T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
332 PM CDT WED JUL 18 2012
THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
NORTHWESTERN ATASCOSA COUNTY...
BEXAR COUNTY...
* UNTIL 530 PM CDT.
* AT 329 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
DETERMINED THAT RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WESTERN
SECTIONS OF SAN ANTONIO FROM NEAR DOWNTOWN TO HELOTES WITH
ADDITIONAL THUNDERSTORMS TRAINING THUNDERSTORMS MOVING NORTHWARD
INTO SOUTHERN BEXAR COUNTY.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...SAN
ANTONIO...ALAMO HEIGHTS...CROSS MOUNTAIN...ELMENDORF...HELOTES...
HOLLYWOOD PARK...KIRBY...LACKLAND AFB...LEON SPRINGS...LEON
VALLEY...OLMOS PARK...SEA WORLD...SHAVANO PARK...SOMERSET...TERRELL
HILLS AND THE DOMINION.
1.20 INCHES OF RAIN WAS REPORTED 5 MILES WEST OF SAN ANTONIO IN LESS
THAN ONE HOUR FROM THESE STORMS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
WHEN WATER COVERS THE ROAD...TURN AROUND DON'T DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.
&&
LAT...LON 2920 9880 2963 9879 2969 9867 2967 9844
2922 9832 2912 9840 2909 9839
$$2 follow-up statements
958
WGUS74 KEWX 182129
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
429 PM CDT WED JUL 18 2012
TXC013-029-182230-
/O.CON.KEWX.FF.W.0053.000000T0000Z-120718T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BEXAR TX-ATASCOSA TX-
429 PM CDT WED JUL 18 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
NORTHWESTERN ATASCOSA AND BEXAR COUNTIES...
AT 420 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS CONTINUED TO
DETECT THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE SOUTHEAST
PORTION OF BEXAR AND WESTERN ATASCOSA COUNTIES. THESE STORMS ARE
MOVING NORTHWARD AT AROUND 20 MPH. HEAVY RAINS WILL BE IMPACTING
HIGHWAY 37 NEARBY THELMA AND BROOKS CITY BASE WITHIN THE NEXT 10
MINUTES WHILE AN ISOLATED HEAVY SHOWER WILL MOVE ACROSS THE
INTERSECTION OF I-10 AND I-35 NEARBY KIRBY WITHIN THE NEXT SEVERAL
MINUTES. ACROSS ATASCOSA COUNTY...HEAVY RAINFALL ARE OCCURRING EAST
OF DAVIS AND MOVING TOWARD CHARLOTTE.
LOCATIONS IN THE WARNING AREA INCLUDE THE DOMINION...TERRELL HILLS...
SHAVANO PARK...SEA WORLD...SAN ANTONIO...OLMOS PARK...LEON VALLEY...
LEON SPRINGS...LACKLAND AFB...HOLLYWOOD PARK...HELOTES...CROSS
MOUNTAIN AND ALAMO HEIGHTS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
RUNOFF FROM HEAVY RAIN WILL FLOOD CREEKS, STREAMS, STREET
INTERSECTIONS, CULVERTS AND UNDERPASSES. LOW LYING PLACES THAT
NORMALLY FLOOD COULD BECOME DEATH TRAPS. DO NOT CROSS ANY FLOODED
AREA. TURN AROUND DON'T DROWN.
&&
LAT...LON 2920 9880 2963 9879 2969 9867 2967 9844
2922 9832 2912 9840 2909 9839
$$006
WGUS74 KEWX 182212
FFSEWX
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
512 PM CDT WED JUL 18 2012
TXC013-029-182230-
/O.CON.KEWX.FF.W.0053.000000T0000Z-120718T2230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BEXAR TX-ATASCOSA TX-
512 PM CDT WED JUL 18 2012
...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 530 PM CDT FOR
NORTHWESTERN ATASCOSA AND BEXAR COUNTIES...
AT 510 PM CDT...MOST OF THUNDERSTORM ACTIVITY HAS DIMINISHED ACROSS
BEXAR COUNTY. HOWEVER...AN ISOLATED STORM WITH HEAVY RAIN IS
AFFECTING THE HOLLYWOOD PARK AREA AND VICINITY. EARLIER VERY HEAVY
RAINFALL HAS PRODUCED URBAN FLOODING ACROSS BEXAR
COUNTY...ESPECIALLY ON SOUTH FLORES STREET...WHERE HIGH WATER RESCUE
IS IN PROGRESS PER LAW ENFORCEMENT OFFICIALS REPORT.
LOCATIONS IN THE WARNING AREA INCLUDE THE DOMINION...TERRELL HILLS...
SHAVANO PARK...SEA WORLD...SAN ANTONIO...OLMOS PARK...LEON VALLEY...
LEON SPRINGS...LACKLAND AFB...HOLLYWOOD PARK...HELOTES...CROSS
MOUNTAIN AND ALAMO HEIGHTS.
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.
LAT...LON 2920 9880 2966 9874 2969 9868 2969 9861
2966 9843 2930 9835 2926 9835 2912 9840
2909 9839
$$The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 18, 3:06 PM CDT | Areal Flood Advisory | EWX | Bexar | 114 min |
| Jul 18, 5:40 PM CDT | Severe Thunderstorm Warning | EWX | Uvalde | 50 min |
| Jul 18, 6:45 PM CDT | Areal Flood Advisory | EWX | Zavala | 105 min |
| Jul 18, 6:52 PM CDT | Severe Thunderstorm Warning | EWX | Kinney, Maverick | 38 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.