Alert archive / Texas / Flash Flood Warnings in 2012

Flash Flood Warning 35, NWS Austin/San Antonio, TX

May 10, 201210 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 10, 2012, 5:58 PM CDT for 10 counties in Texas. It was in force for 3 hr. 6 reports 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: May 10, 2012, 5:58 PM CDT (22:58 UTC)
Expired: May 10, 2012, 9:00 PM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: None

Counties Bandera County, TX, Blanco County, TX, Burnet County, TX, Edwards County, TX, Gillespie County, TX, Kendall County, TX, Kerr County, TX, Llano County, TX, Real County, TX, Uvalde County, TX

The radar

The Austin/San Antonio radar (KEWX), 112 km from the middle of the area, began a volume at 22:58 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
May 10, 6:10 PM CDT	HEAVY RAIN 2.74	11 Ne Fredericksburg, TX	2.50 TO 2.74 INCHES OF RAINFALL IN 45 MINUTES... SOME STREAMS OUT OF THEIR BANKS.
May 10, 6:14 PM CDT	FLASH FLOOD	Rio Frio, TX	TXDOT REPORTING FLOODED LOW WATER CROSSINGS ALONG FM 1120 FROM RIO FRIO TO LEAKEY
May 10, 7:22 PM CDT	HEAVY RAIN 2.1	7 Ne Lbj State Park, TX	2.10 INCHES OF RAINFALL IN 40 MINUTES.
May 10, 7:38 PM CDT	HEAVY RAIN 1.11	6 Ene Lbj State Park, TX	1.11 INCHES OF RAINFALL IN 43 MINUTES.
May 10, 7:39 PM CDT	FLASH FLOOD	Concan, TX	TXDOT REPORTED HWY 127 CLOSED DUE TO FRIO RIVER FLOODING ON CONCAN ROAD. LOW WATER CROSSINGS ON FRIO RIVER AND DRY FRIO RIVERS ALONG RM 2690 ARE FLOODING.
May 10, 8:35 PM CDT	HEAVY RAIN 1	3 W Horseshoe Bay, TX	ONE INCH OF RAINFALL IN 30 MINUTES ALONG WITH MINOR FLOODING.

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 12:00Z, 11.0 hours before the alert went out and 208 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1149 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 663 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 111 m²/s²
0-3 km storm-relative helicity: 185 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 7.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

135 
WGUS54 KEWX 102258
FFWEWX
TXC019-031-053-137-171-259-265-299-385-463-110200-
/O.NEW.KEWX.FF.W.0035.120510T2258Z-120511T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
558 PM CDT THU MAY 10 2012

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BANDERA COUNTY...
  BLANCO COUNTY...
  BURNET COUNTY...
  EASTERN EDWARDS COUNTY...
  GILLESPIE COUNTY...
  KENDALL COUNTY...
  KERR COUNTY...
  LLANO COUNTY...
  REAL COUNTY...
  NORTHERN UVALDE COUNTY...

* UNTIL 900 PM CDT.

* AT 555 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
  DETECTED VERY HEAVY RAINS MOVING EAST INTO THE EASTERN HILL
  COUNTRY IN AN AREA GENERALLY ALONG A LAKEHILLS TO STONEWALL 
  TO LLANO TO CHEROKEE LINE MOVING EAST AT 15 MPH. RAINS WILL MOVE
  OVER THE SAME AREAS FOR THE NEXT COUPLE OF HOURS. RAINFALL RATES
  OF 1 TO 3 INCHES PER HOUR HAVE BEEN ESTIMATED AND WILL CONTINUE TO
  OCCUR. FURTHER WEST RIVERS AND STREAMS WILL CONTINUE TO RISE DUE 
  TO EARLIER HEAVY RAINS. NUMEROUS ROADS WILL REMAIN OR BECOME 
  FLOODED. 

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
  OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BANDERA...BERTRAM...BLANCO...BOERNE...BUCHANAN DAM...BURNET...
  COMFORT...FREDERICKSBURG...KERRVILLE...KINGSLAND...LEAKEY...
  LLANO...MARBLE FALLS...MEDINA...ROUND MOUNTAIN...TARPLEY...
  VANDERPOOL...ALBERT...BABY HEAD...BANDERA FALLS...BANKERSMITH...
  BARKSDALE...BLOWOUT...BLUFFTON...BLUMENTHAL...CAIN CITY...CAMP
  VERDE...CAMP WOOD...CASTELL AND CENTER POINT.



PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN WATER COVERS THE ROAD...TURN AROUND DON'T DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.

&&

LAT...LON 3006 9833 2965 9896 2963 9943 2932 9943
      2933 10007 3030 10013 3029 9931 3051 9930
      3051 9897 3093 9896 3093 9843 3095 9846
      3099 9845 3104 9790

$$

4 follow-up statements

910 
WGUS74 KEWX 102311
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
611 PM CDT THU MAY 10 2012

TXC019-031-053-137-171-259-265-299-385-463-110200-
/O.CON.KEWX.FF.W.0035.000000T0000Z-120511T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
EDWARDS TX-GILLESPIE TX-KENDALL TX-KERR TX-LLANO TX-REAL TX-UVALDE 
TX-BURNET TX-BLANCO TX-BANDERA TX-
611 PM CDT THU MAY 10 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR
BANDERA...BLANCO...BURNET...NORTHERN UVALDE...REAL...LLANO...KERR...
KENDALL...GILLESPIE AND EASTERN EDWARDS COUNTIES...

AT 610 PM CDT...A BAND OF VERY HEAVY RAINS WITH EMBEDDED 
THUNDERSTORMS EXTENDED FROM JUST NORTH OF FREDERICKSBURG SOUTH TO 
BANDERA.  RAINFALL RATES NEAR 2 INCHES PER HOUR WERE INDICATED IN 
THE HEAVIEST STORMS ALONG THE KERR...KENDALL COUNTY LINE EAST OF 
KERRVILLE AND BETWEEN MEDINA AND CENTER POINT. THIS BAND WAS MOVING 
TO THE NORTHEAST AT 30 MPH. 

SEVERAL LOW WATER CROSSINGS ALONG HIGHWAY 187 IN WESTERN BANDERA 
COUNTY ARE FLOODED. MOTORISTS ARE ENCOURAGED TO AVOID TRAVELING ALONG
THIS ROAD FOR THE NEXT COUPLE OF HOURS DUE TO CONTINUED RUNOFF. 

LOCATIONS IN THE WARNING AREA INCLUDE JOPPA...SUNNYLANE...LAKE 
VICTOR...WATSON...SHADY GROVE...OATMEAL...SMITHWICK...LONE 
GROVE...GAINESVILLE...STOLZ...BLUFFTON...OXFORD...BABY HEAD...VALLEY 
SPRING...FIELD CREEK...PRAIRIE MOUNTAIN...BLOWOUT...SANDY...ECKERT...
CRABAPPLE...HILLTOP...CHERRY SPRING...DOSS...ROUND MOUNTAIN...CYPRESS
MILL...WILLOW CITY...TOW...LLANO...KINGSLAND...HORSESHOE 
BAY...ENCHANTED ROCK STATION...CASTELL...BUCHANAN 
DAM...SPICEWOOD...MEADOWLAKES...MARBLE FALLS...INKS LAKE STATE 
PARK...GRANITE SHOALS...BURNET AND BERTRAM.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT THURSDAY EVENING
FOR SOUTH CENTRAL TEXAS. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN
EFFECT UNTIL 800 PM CDT THURSDAY EVENING FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 3006 9833 2965 9896 2963 9943 2932 9943
      2933 10007 3030 10013 3029 9931 3051 9930
      3051 9897 3093 9896 3093 9843 3095 9846
      3099 9845 3104 9790

$$

906 
WGUS74 KEWX 102329
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
629 PM CDT THU MAY 10 2012

TXC019-031-053-137-171-259-265-299-385-463-110200-
/O.CON.KEWX.FF.W.0035.000000T0000Z-120511T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
EDWARDS TX-GILLESPIE TX-KENDALL TX-KERR TX-LLANO TX-REAL TX-UVALDE 
TX-BURNET TX-BLANCO TX-BANDERA TX-
629 PM CDT THU MAY 10 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR
BANDERA...BLANCO...BURNET...NORTHERN UVALDE...REAL...LLANO...KERR...
KENDALL...GILLESPIE AND EASTERN EDWARDS COUNTIES...

AT 625 PM CDT...A BAND OF HEAVY RAINS WITH EMBEDDED THUNDERSTORMS 
EXTENDING FROM EASTERN GILLESPIE COUNTY SOUTHWEST TO JUST SOUTH 
SOUTHWEST OF PIPE CREEK. RAINFALL RATES OF UP TO AND INCH AND THREE 
QUARTERS PER HOUR WERE INDICATED SOUTH OF KERRVILLE. THIS BAND OF 
HEAVY RAIN AND STORMS WERE MOVING NORTHEAST AT 25 MPH. 

SMALL STREAMS AND CREEKS ACROSS THE COUNTY WILL FLOOD THE NEXT FEW 
HOURS.  MOTORISTS SHOULD APPROACH LOW BRIDGES AND CROSSINGS AT SLOW 
SPEED...AND UNDER NO CIRCUMSTANCES DRIVE INTO FLOODED CROSSINGS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT THURSDAY EVENING
FOR SOUTH CENTRAL TEXAS. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN
EFFECT UNTIL 800 PM CDT THURSDAY EVENING FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 3006 9833 2965 9896 2963 9943 2932 9943
      2933 10007 3030 10013 3029 9931 3051 9930
      3051 9897 3093 9896 3093 9843 3095 9846
      3099 9845 3104 9790

$$

673 
WGUS74 KEWX 102333
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
633 PM CDT THU MAY 10 2012

TXC019-031-053-137-171-259-265-299-385-463-110200-
/O.CON.KEWX.FF.W.0035.000000T0000Z-120511T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
EDWARDS TX-GILLESPIE TX-KENDALL TX-KERR TX-LLANO TX-REAL TX-UVALDE 
TX-BURNET TX-BLANCO TX-BANDERA TX-
633 PM CDT THU MAY 10 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR
BANDERA...BLANCO...BURNET...NORTHERN UVALDE...REAL...LLANO...KERR...
KENDALL...GILLESPIE AND EASTERN EDWARDS COUNTIES...

AT 630 PM CDT...A BAND OF HEAVY RAINS WITH EMBEDDED THUNDERSTORMS 
EXTENDING FROM EASTERN GILLESPIE COUNTY SOUTHWEST TO JUST SOUTH 
SOUTHWEST OF PIPE CREEK. RAINFALL RATES OF UP TO AND INCH AND THREE 
QUARTERS PER HOUR WERE INDICATED SOUTH OF KERRVILLE. THIS BAND OF 
HEAVY RAIN AND STORMS WERE MOVING NORTHEAST AT 25 MPH. 

SMALL STREAMS AND CREEKS ACROSS THESE COUNTIES WILL FLOOD THE NEXT 
FEW HOURS.  MOTORISTS SHOULD APPROACH LOW BRIDGES AND CROSSINGS AT 
SLOW SPEED...AND UNDER NO CIRCUMSTANCES DRIVE INTO FLOODED 
CROSSINGS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT THURSDAY EVENING
FOR SOUTH CENTRAL TEXAS. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN
EFFECT UNTIL 800 PM CDT THURSDAY EVENING FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 3006 9833 2965 9896 2963 9943 2932 9943
      2933 10007 3030 10013 3029 9931 3051 9930
      3051 9897 3093 9896 3093 9843 3095 9846
      3099 9845 3104 9790

$$

869 
WGUS74 KEWX 110032
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
732 PM CDT THU MAY 10 2012

TXC019-031-053-137-171-259-265-299-385-463-110200-
/O.CON.KEWX.FF.W.0035.000000T0000Z-120511T0200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
EDWARDS TX-GILLESPIE TX-KENDALL TX-KERR TX-LLANO TX-REAL TX-UVALDE 
TX-BURNET TX-BLANCO TX-BANDERA TX-
732 PM CDT THU MAY 10 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 PM CDT FOR
BANDERA...BLANCO...BURNET...NORTHERN UVALDE...REAL...LLANO...KERR...
KENDALL...GILLESPIE AND EASTERN EDWARDS COUNTIES...

AT 725 PM CDT...A BAND OF HEAVY RAIN WITH EMBEDDED THUNDERSTORMS
EXTENDED FROM NEAR MARBLE FALLS SOUTH TO NEAR FISCHER THEN SOUTHWEST
TO JUST NORTH OF BOERNE. RADAR INDICATED RAINFALL RATES OF NEAR 2 
INCHES PER HOUR IN THE HEAVIEST SHOWERS AND STORMS. THE STORMS 
CONTINUED EAST AT 25 TO 30 MPH.

FAST MOVING RISES DOWN MINOR STREAMS AND CREEKS WILL MAKE LOW WATER 
BRIDGES AND CROSSINGS DANGEROUS THE NEXT FEW HOURS ACROSS BLANCO AND
KENDALL COUNTIES.  FAST MOVING WATER CAN RISE QUICKLY...STALL AUTOS 
AND SWEEP THEM DOWNSTREAM.  MOTORISTS SHOULD NOT ATTEMPT TO CROSS 
FLOODED ROADS...AND CROSSINGS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT UNTIL 800 PM CDT THURSDAY EVENING
FOR SOUTH CENTRAL TEXAS. A SEVERE THUNDERSTORM WATCH ALSO REMAINS IN
EFFECT UNTIL 800 PM CDT THURSDAY EVENING FOR SOUTH CENTRAL TEXAS.

&&

LAT...LON 3006 9833 2965 9896 2963 9943 2932 9943
      2933 10007 3030 10013 3029 9931 3051 9930
      3051 9897 3093 9896 3093 9843 3095 9846
      3099 9845 3104 9790

$$

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 10, 5:21 AM CDT	Severe Thunderstorm Warning	EWX	Val Verde	54 min
May 10, 6:12 AM CDT	Severe Thunderstorm Warning	EWX	Val Verde	63 min
May 10, 7:19 AM CDT	Severe Thunderstorm Warning	EWX	Edwards, Val Verde	44 min
May 10, 9:29 AM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Frio, Zavala	61 min
May 10, 10:30 AM CDT	Severe Thunderstorm Warning	EWX	Frio	60 min
May 10, 10:33 AM CDT	Areal Flood Advisory	EWX	Frio	117 min
May 10, 11:17 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Frio	58 min
May 10, 11:32 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Wilson	58 min
May 10, 12:02 PM CDT	Flash Flood Warning	EWX	Val Verde	3 hr
May 10, 12:14 PM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Frio	31 min
May 10, 12:20 PM CDT	Areal Flood Advisory	EWX	Atascosa, Frio	2 hr
May 10, 12:40 PM CDT	Areal Flood Advisory	EWX	Bandera, Edwards, Kerr, Kinney, Real, Uvalde	110 min
May 10, 1:04 PM CDT	Severe Thunderstorm Warning	EWX	Karnes, Wilson	56 min
May 10, 1:15 PM CDT	Tornado Warning	EWX	Gonzales, Karnes, Wilson	45 min
May 10, 1:42 PM CDT	Tornado Warning	EWX	Atascosa	33 min
May 10, 1:57 PM CDT	Tornado Warning	EWX	DeWitt, Gonzales, Karnes, Wilson	33 min
May 10, 2:19 PM CDT	Flash Flood Warning	EWX	Atascosa, DeWitt, Gonzales, Karnes, Wilson	3 hr
May 10, 2:24 PM CDT	Severe Thunderstorm Warning	EWX	Karnes	51 min
May 10, 2:42 PM CDT	Tornado Warning	EWX	Karnes	48 min
May 10, 2:49 PM CDT	Flash Flood Warning	EWX	Bandera, Edwards, Kerr, Real, Uvalde	3 hr
May 10, 3:05 PM CDT	Tornado Warning	EWX	Wilson	40 min
May 10, 3:31 PM CDT	Tornado Warning	EWX	Karnes	29 min
May 10, 3:40 PM CDT	River Flood Warning	EWX	Val Verde	31 hr
May 10, 3:45 PM CDT	Areal Flood Advisory	EWX	DeWitt, Fayette, Gonzales, Lavaca	105 min
May 10, 3:57 PM CDT	Tornado Warning	EWX	DeWitt, Karnes, Wilson	33 min
May 10, 4:39 PM CDT	Flash Flood Warning	EWX	Bandera, Gillespie, Kerr	81 min
May 10, 4:52 PM CDT	Severe Thunderstorm Warning	EWX	DeWitt, Gonzales, Karnes	29 min
May 10, 5:58 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Maverick, Uvalde, Zavala	47 min
May 10, 6:11 PM CDT	Areal Flood Advisory	EWX	DeWitt, Fayette, Karnes, Lavaca	109 min
May 10, 6:41 PM CDT	Severe Thunderstorm Warning	EWX	Dimmit, Frio, Zavala	49 min

Nearby

Flash Flood Warnings in Texas, 2012 Every 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.