Alert archive / Texas / Flash Flood Warnings in 2009

Flash Flood Warning 7, NWS Austin/San Antonio, TX

April 27, 20094 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Apr 27, 2009, 1:14 PM CDT for 4 counties in Texas. It was in force for 116 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Apr 27, 2009, 1:14 PM CDT (18:14 UTC)
Expired: Apr 27, 2009, 3:10 PM CDT
In force: 116 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: None

Counties Bandera County, TX, Gillespie County, TX, Kendall County, TX, Kerr County, TX

The radar

The Austin/San Antonio radar (KEWX), 102 km from the middle of the area, began a volume at 18:16 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.

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 6.2 hours before the alert went out and 194 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: 2567 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 669 m above ground
0-6 km bulk shear: 48 kt
0-1 km storm-relative helicity: 160 m²/s²
0-3 km storm-relative helicity: 224 m²/s²
Significant tornado parameter: 2.8
Supercell composite: 10.9

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 271814
FFWEWX
TXC019-171-259-265-272115-
/O.NEW.KEWX.FF.W.0007.090427T1814Z-090427T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
114 PM CDT MON APR 27 2009

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BANDERA COUNTY...
  GILLESPIE COUNTY...
  KENDALL COUNTY...
  KERR COUNTY...

* UNTIL 415 PM CDT.

* AT 112 PM CDT...THE NATIONAL WEATHER SERVICE HAS DETERMINED THAT
  RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE FLASH FLOODING 
  FROM A THUNDERSTORM OVER THE WARNED AREA.   SHOWERS AND
  THUNDERSTORMS WILL PRODUCE HEAVY RAINS OVER PARTS OF  
  KERR...BANDERA...GILLESPIE AND KENDAL COUNTIES FOR THE
  NEXT 1 TO 2 HOURS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  BLUMENTHAL...STONEWALL...CAIN CITY...ROCKY HILL...TIVYDALE...
  ECKERT...CRABAPPLE...HILLTOP...DOSS...WILLOW CITY...MOUNTAIN
  HOME...LUCKENBACH...LBJ STATE PARK...HARPER AND FREDERICKSBURG.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

WHEN WATER COVERS THE ROAD...TURN AROUND DONT DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.

&&

LAT...LON 3049 9861 3017 9863 2995 9846 2978 9865
      2977 9878 2966 9889 2964 9906 2965 9941
      2997 9962 3030 9939 3030 9932 3041 9931
      3048 9926

$$

2 follow-up statements

000 
WGUS74 KEWX 271846
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
146 PM CDT MON APR 27 2009

TXC019-171-259-265-272115-
/O.CON.KEWX.FF.W.0007.000000T0000Z-090427T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GILLESPIE TX-KERR TX-KENDALL TX-BANDERA TX-
146 PM CDT MON APR 27 2009

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM CDT FOR
BANDERA...KENDALL...KERR AND GILLESPIE COUNTIES...

AT 142 PM CDT...SHOWERS AND THUNDERSTORMS...WITH HEAVY RAIN CONTINUED
FROM EASTERN BANDERA AND KERR COUNTY AND EXTENDING EAST TO GILLESPIE
AND KENDALL COUNTIES.  AREAS OF RAIN...HEAVY AT TIMES...ARE EXPECTED 
FOR THE NEXT FEW HOURS.

LOCATIONS IN THE WARNING AREA INCLUDE BLUMENTHAL...STONEWALL...
GRAPETOWN...CAIN CITY...ROCKY HILL...TIVYDALE...ECKERT...CRABAPPLE...
HILLTOP...DOSS...WALTONIA...WILLOW CITY...MOUNTAIN HOME...
LUCKENBACH...LBJ STATE PARK...KERR WILDLIFE MGMT AREA...INGRAM...
HUNT...HARPER...FREDERICKSBURG AND BANKERSMITH.

LAT...LON 3049 9861 3017 9863 2995 9846 2978 9865
      2977 9878 2966 9889 2964 9906 2965 9941
      2997 9962 3030 9939 3030 9932 3041 9931
      3048 9926

$$

000 
WGUS74 KEWX 272010
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
310 PM CDT MON APR 27 2009

TXC019-171-259-265-272018-
/O.CAN.KEWX.FF.W.0007.000000T0000Z-090427T2115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GILLESPIE TX-KERR TX-KENDALL TX-BANDERA TX-
310 PM CDT MON APR 27 2009

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR BANDERA...
KENDALL...KERR AND GILLESPIE COUNTIES...

SHOWERS AND THUNDERSTORMS THAT PRODUCED LOCALLY HEAVY RAINS
EARLIER THIS AFTERNOON HAVE MOVED EAST AND THIS TREND IS
EXPECTED TO CONTINUE FOR THE NEXT FEW HOURS.  BRIEF LIGHT
TO MODERATE RAINS COULD DEVELOP...HOWEVER THE CHANCE OF
HEAVY RAIN HAS DIMINISHED.

LAT...LON 3049 9861 3017 9863 2995 9846 2978 9865
      2977 9878 2966 9889 2964 9906 2965 9941
      2997 9962 3030 9939 3030 9932 3041 9931
      3048 9926

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 26, 9:42 PM CDT	Tornado Warning	EWX	Edwards	33 min
Apr 26, 10:13 PM CDT	Tornado Warning	EWX	Edwards, Kerr	32 min
Apr 26, 10:42 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kerr	48 min
Apr 27, 12:11 AM CDT	Severe Thunderstorm Warning	EWX	Gillespie	49 min
Apr 27, 3:20 AM CDT	Areal Flood Advisory	EWX	Travis, Williamson	115 min
Apr 27, 4:28 AM CDT	Tornado Warning	EWX	Williamson	32 min
Apr 27, 4:48 AM CDT	Tornado Warning	EWX	Williamson	27 min
Apr 27, 7:11 AM CDT	Flood Watch	EWX	Blanco, Burnet, Gillespie, Hays, Kendall, Kerr and 3 more	8 min
Apr 27, 7:19 AM CDT	Flash Flood Watch	EWX	Blanco, Burnet, DeWitt, Fayette, Gillespie, Gonzales and 8 more	11 hr
Apr 27, 9:14 AM CDT	Areal Flood Advisory	EWX	Burnet, Gillespie, Llano	2 hr
Apr 27, 9:53 AM CDT	Areal Flood Advisory	EWX	Edwards, Val Verde	112 min
Apr 27, 11:00 AM CDT	Flash Flood Warning	EWX	Val Verde	39 min
Apr 27, 11:22 AM CDT	Areal Flood Advisory	EWX	Bandera, Blanco, Burnet, Gillespie, Kendall, Kerr and 2 more	113 min
Apr 27, 11:30 AM CDT	Areal Flood Advisory	EWX	Edwards	2 hr
Apr 27, 11:46 AM CDT	Areal Flood Advisory	EWX	Kinney, Uvalde, Val Verde	119 min
Apr 27, 11:58 AM CDT	Areal Flood Advisory	EWX	Bastrop, Bexar, Caldwell, Comal, Guadalupe, Hays and 5 more	2 hr
Apr 27, 12:30 PM CDT	Areal Flood Advisory	EWX	DeWitt, Fayette, Gonzales, Karnes, Lavaca	2 hr
Apr 27, 12:53 PM CDT	Areal Flood Advisory	EWX	Bandera, Blanco, Burnet, Gillespie, Kendall, Kerr and 2 more	3 hr
Apr 27, 1:01 PM CDT	River Flood Warning	EWX	Val Verde	7 hr
Apr 27, 1:07 PM CDT	Flash Flood Warning	EWX	Hays, Travis, Williamson	2 hr
Apr 27, 1:34 PM CDT	Flash Flood Warning	EWX	Caldwell, Gonzales, Guadalupe, Wilson	3 hr
Apr 27, 1:53 PM CDT	Flash Flood Warning	EWX	Blanco, Comal	95 min
Apr 27, 1:54 PM CDT	Severe Thunderstorm Warning	EWX	Gonzales, Guadalupe, Wilson	66 min
Apr 27, 2:08 PM CDT	Flash Flood Warning	EWX	Bexar	84 min
Apr 27, 2:26 PM CDT	Flash Flood Warning	EWX	Fayette	3 hr
Apr 27, 2:30 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell, Gonzales, Guadalupe, Wilson	60 min
Apr 27, 2:44 PM CDT	Areal Flood Advisory	EWX	DeWitt, Karnes, Lavaca	2 hr
Apr 27, 3:16 PM CDT	Flash Flood Warning	EWX	DeWitt, Karnes, Lavaca	3 hr
Apr 27, 3:28 PM CDT	Severe Thunderstorm Warning	EWX	DeWitt, Gonzales, Karnes	62 min
Apr 27, 3:40 PM CDT	Tornado Warning	EWX	DeWitt, Gonzales, Karnes	50 min
Apr 27, 4:04 PM CDT	Tornado Warning	EWX	DeWitt	26 min
Apr 27, 4:06 PM CDT	Severe Thunderstorm Warning	EWX	DeWitt, Gonzales, Lavaca	39 min
Apr 27, 4:23 PM CDT	Tornado Warning	EWX	DeWitt, Lavaca	52 min

Nearby

Flash Flood Warnings in Texas, 2009 Every flash flood warning in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.