Alert archive / Texas / Flash Flood Warnings in 2015

Flash Flood Warning 101, NWS Austin/San Antonio, TX

May 30, 20155 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 30, 2015, 4:40 PM CDT for 5 counties in Texas. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 30, 2015, 4:40 PM CDT (21:40 UTC)
Expired: May 30, 2015, 8:30 PM CDT
In force: 4 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: None

Counties Bastrop County, TX, Caldwell County, TX, Fayette County, TX, Gonzales County, TX, Guadalupe County, TX

The radar

The Austin/San Antonio radar (KEWX), 92 km from the middle of the area, began a volume at 21:42 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

Corpus Christi, TX (KCRP), launched 12:00Z, 9.7 hours before the alert went out and 230 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: 1820 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 863 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: -26 m²/s²
0-3 km storm-relative helicity: 1 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

080 
WGUS54 KEWX 302140
FFWEWX
TXC021-055-149-177-187-310130-
/O.NEW.KEWX.FF.W.0101.150530T2140Z-150531T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
440 PM CDT SAT MAY 30 2015

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL GUADALUPE COUNTY IN SOUTH CENTRAL TEXAS...
  SOUTHEASTERN CALDWELL COUNTY IN SOUTH CENTRAL TEXAS...
  FAYETTE COUNTY IN SOUTH CENTRAL TEXAS...
  SOUTHERN BASTROP COUNTY IN SOUTH CENTRAL TEXAS...
  NORTHERN GONZALES COUNTY IN SOUTH CENTRAL TEXAS...

* UNTIL 830 PM CDT
    
* AT 436 PM CDT...DOPPLER RADAR INDICATED A CLUSTER OF STRONG 
  THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA...WHICH 
  INCLUDES AREAS ALONG I-10 FROM LULING TO SCHULENBURG AND EXTENDS 
  NORTH INTO THE ROSANKY AND LA GRANGE AREAS. FLASH FLOODING IS 
  EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LULING...LA GRANGE...SCHULENBURG...FLATONIA...WAELDER...
  FAYETTEVILLE...PALMETO...ROSANKY...MULDOON...CISTERN...
  BROWNSBORO...MCMAHAN...OTTINE...ELLINGER...REK HILL...TILMON...
  WILLOW SPRINGS...STAIRTOWN...MCNEIL AND KOVAR.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT ENTER OR CROSS FLOWING WATER OR WATER OF UNKNOWN DEPTH. TURN 
AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD 
DEATHS OCCUR IN VEHICLES. REMAIN ALERT FOR FLOODING EVEN IN 
LOCATIONS NOT RECEIVING RAIN. CREEKS...STREAMS AND RIVERS CAN BECOME 
RAGING KILLER CURRENTS IN A MATTER OF MINUTES...EVEN FROM DISTANT 
RAINFALL.

&&

LAT...LON 2963 9688 2963 9714 2955 9772 2970 9776
      2995 9754 3005 9662 2998 9658 2995 9658

$$

MO

1 follow-up statement

476 
WGUS74 KEWX 302325
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
625 PM CDT SAT MAY 30 2015

TXC021-055-149-177-187-310130-
/O.CON.KEWX.FF.W.0101.000000T0000Z-150531T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GUADALUPE TX-CALDWELL TX-FAYETTE TX-BASTROP TX-GONZALES TX-
625 PM CDT SAT MAY 30 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM CDT FOR
EAST CENTRAL GUADALUPE...SOUTHEASTERN CALDWELL...SOUTHERN FAYETTE...
SOUTH CENTRAL BASTROP AND NORTHERN GONZALES COUNTIES...

AT 622 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING 
HEAVY RAIN ACROSS THE WARNED AREA. UP TO THREE INCHES OF RAIN HAVE 
LIKELY FALLEN JUST NORTHWEST OF LULING. FLASH FLOODING IS EXPECTED 
TO AFFECT AREAS ALONG AND 10 MILES NORTH OF I-10 FROM LULING TO 
SCHULENBURG.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
LULING...SCHULENBURG...FLATONIA...WAELDER...MULDOON...PALMETO...
CISTERN...BROWNSBORO...MCMAHAN...THOMPSONVILLE...OTTINE...DUBINA...
ELLINGER...ENGLE...TILMON...AMMANNSVILLE...STAIRTOWN...MCNEIL...FLOY
AND HOLMAN.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT ENTER OR CROSS FLOWING WATER OR WATER OF UNKNOWN DEPTH. TURN 
AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD 
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 2963 9688 2963 9714 2955 9772 2970 9776
      2989 9758 2984 9701 2989 9664

$$

MO

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 4:24 AM CDT	Special Weather Statement	EWX	Edwards, Gillespie, Kerr, Llano, Real, Val Verde	51 min
May 30, 5:11 AM CDT	Special Weather Statement	EWX	Bandera, Blanco, Burnet, Edwards, Gillespie, Kendall and 4 more	64 min
May 30, 9:11 AM CDT	Special Weather Statement	EWX	Val Verde	49 min
May 30, 11:26 AM CDT	Areal Flood Advisory	EWX	Val Verde	109 min
May 30, 11:26 AM CDT	Special Weather Statement	EWX	Edwards, Kinney	64 min
May 30, 12:05 PM CDT	Severe Thunderstorm Warning	EWX	Kinney, Val Verde	40 min
May 30, 12:45 PM CDT	Severe Thunderstorm Warning	EWX	Kinney	45 min
May 30, 1:14 PM CDT	Areal Flood Advisory	EWX	Kinney, Maverick	2 hr
May 30, 1:23 PM CDT	Special Weather Statement	EWX	Maverick	52 min
May 30, 1:28 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Real, Uvalde	47 min
May 30, 2:15 PM CDT	Special Weather Statement	EWX	Bandera, Comal, Hays, Kendall	45 min
May 30, 2:21 PM CDT	Special Weather Statement	EWX	Dimmit, Uvalde, Zavala	54 min
May 30, 2:40 PM CDT	Flash Flood Warning	EWX	Kinney, Uvalde	3 hr
May 30, 2:46 PM CDT	Flash Flood Warning	EWX	Bandera, Bexar, Blanco, Comal, Hays, Kendall and 2 more	4 hr
May 30, 3:24 PM CDT	Special Weather Statement	EWX	Caldwell, Comal, Hays, Kendall	36 min
May 30, 3:32 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell, Guadalupe	43 min
May 30, 3:39 PM CDT	Flash Flood Warning	EWX	Caldwell, Guadalupe, Hays	4 hr
May 30, 3:43 PM CDT	Special Weather Statement	EWX	Frio	47 min
May 30, 3:54 PM CDT	Special Weather Statement	EWX	Medina	51 min
May 30, 3:59 PM CDT	Special Weather Statement	EWX	Bexar, Guadalupe	61 min
May 30, 4:10 PM CDT	Severe Thunderstorm Warning	EWX	Gonzales, Guadalupe	49 min
May 30, 4:11 PM CDT	Special Weather Statement	EWX	Fayette	49 min
May 30, 4:21 PM CDT	Flash Flood Warning	EWX	Bexar, Comal, Guadalupe, Medina, Wilson	4 hr
May 30, 4:36 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell	39 min
May 30, 4:43 PM CDT	Special Weather Statement	EWX	Travis	47 min
May 30, 4:53 PM CDT	Areal Flood Advisory	EWX	Travis	3 hr
May 30, 5:00 PM CDT	Special Weather Statement	EWX	Fayette	45 min
May 30, 5:21 PM CDT	Special Weather Statement	EWX	Atascosa, DeWitt, Karnes	39 min
May 30, 5:25 PM CDT	Flash Flood Warning	EWX	Travis	2 hr
May 30, 5:46 PM CDT	Areal Flood Advisory	EWX	Atascosa, DeWitt, Karnes, Lavaca, Wilson	3 hr
May 30, 5:57 PM CDT	Flash Flood Warning	EWX	DeWitt, Karnes, Lavaca	4 hr
May 30, 6:19 PM CDT	Special Weather Statement	EWX	DeWitt	41 min

Nearby

Flash Flood Warnings in Texas, 2015 Every flash flood warning in 2015

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.