Alert archive / Texas / Flash Flood Warnings in 2015

Flash Flood Warning 90, NWS Austin/San Antonio, TX

May 27, 2015Hays County, Travis County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 27, 2015, 11:01 AM CDT for Hays County, Travis County, Texas. It was in force for 2 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
May 27, 2015, 11:01 AM CDT (16:01 UTC)
Expired
May 27, 2015, 1:30 PM CDT
In force
2 hr
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon
Flood severity
None

Counties Hays County, TX, Travis County, TX

The radar

The Austin/San Antonio radar (KEWX), 59 km from the middle of the area, began a volume at 16:03 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

TimeReportWhereRemark
May 27, 11:38 AM CDTFLASH FLOOD3 W Sunset Valley, TXJOE TANNER LN AND OLD BEE CAVES RD LOW WATER CROSSINGS HAVE BEEN CLOSED DUE TO FLOODING.

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, 4.0 hours before the alert went out and 280 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-pSkew-T log-p diagram, Corpus Christi, TX at 12:00Z on 2015-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2154 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 12:00Z on 2015-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2154 J/kg
Mixed-layer CIN
-71 J/kg
Mixed-layer LCL
879 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

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

133 
WGUS54 KEWX 271601
FFWEWX
TXC209-453-271830-
/O.NEW.KEWX.FF.W.0090.150527T1601Z-150527T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1101 AM CDT WED MAY 27 2015

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EAST CENTRAL HAYS COUNTY IN SOUTH CENTRAL TEXAS...
  SOUTH CENTRAL TRAVIS COUNTY IN SOUTH CENTRAL TEXAS...

* UNTIL 130 PM CDT
    
* AT 1100 AM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LITTLE BEAR CREEK AND SLAUGHTER CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3030 9775 3005 9777 3007 9797 3032 9797

$$

RUNYEN
2 follow-up statements
635 
WGUS74 KEWX 271701
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1201 PM CDT WED MAY 27 2015

TXC209-453-271830-
/O.CON.KEWX.FF.W.0090.000000T0000Z-150527T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAYS TX-TRAVIS TX-
1201 PM CDT WED MAY 27 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 130 PM CDT FOR
EAST CENTRAL HAYS AND SOUTH CENTRAL TRAVIS COUNTIES...

AT 1153 AM CDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED 
THAT BETWEEN 1 AND 2 INCHES OF RAIN HAS FALLEN ACROSS SOUTH CENTRAL 
TRAVIS COUNTY AND EAST CENTRAL HAYS COUNTY...BETWEEN BUDA AND SUNSET 
VALLEY...WITH ISOLATED POCKETS OF 2 1/2 INCHES JUST NORTHWEST OF 
TANGLEWOOD FOREST. 

FLASH FLOODING IS OCCURRING ACROSS SOME LOW WATER CROSSING IN THE 
AREA. WHILE RAINFALL HAS ENDED...RUNOFF FROM EARLIER HEAVY RAINFALL 
WILL CONTINUE THE FLASH FLOODING THREAT OF LOW WATER CROSSING.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...TANGLEWOOD 
FOREST...LITTLE BEAR CREEK...SLAUGHTER CREEK...BARTON CREEK...SUNSET 
VALLEY...HAYS...LOST CREEK AND MANCHACA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE.

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3030 9775 3005 9777 3007 9797 3032 9797

$$

RUNYEN
622 
WGUS74 KEWX 271824
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
124 PM CDT WED MAY 27 2015

TXC209-453-271831-
/O.EXP.KEWX.FF.W.0090.000000T0000Z-150527T1830Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAYS TX-TRAVIS TX-
124 PM CDT WED MAY 27 2015

...THE FLASH FLOOD WARNING FOR EAST CENTRAL HAYS AND SOUTH CENTRAL
TRAVIS COUNTIES WILL EXPIRE AT 130 PM CDT...

THE FLASH FLOOD THREAT IS ENDING. PLEASE CONTINUE TO HEED ANY ROAD 
CLOSURES AND BE ALERT FOR FLOODING ALONG LOW WATER CROSSINGS.

LAT...LON 3030 9775 3005 9777 3007 9797 3032 9797

$$

RUNYEN

The office that day

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

IssuedProductOfficeCountiesLasted
May 27, 5:32 AM CDTFlash Flood WarningEWXFayette, Lee118 min
May 27, 10:12 AM CDTAreal Flood AdvisoryEWXHays, Travis2 hr
May 27, 10:30 AM CDTSevere Thunderstorm WarningEWXTravis45 min
May 27, 11:15 AM CDTSevere Thunderstorm WarningEWXTravis19 min
May 27, 11:19 AM CDTSevere Thunderstorm WarningEWXBlanco, Comal, Hays41 min
May 27, 11:47 AM CDTTornado Warning Tornado observedEWXBlanco27 min
May 27, 12:00 PM CDTSevere Thunderstorm WarningEWXBlanco, Hays20 min
May 27, 12:09 PM CDTFlash Flood WarningEWXBlanco, Comal, Hays3 hr
May 27, 12:48 PM CDTSpecial Weather StatementEWXGillespie27 min
May 27, 12:52 PM CDTFlash Flood WatchEWXBastrop, Blanco, Burnet, Caldwell, Gillespie, Hays and 4 more8 hr
May 27, 1:38 PM CDTSpecial Weather StatementEWXLlano52 min

Nearby

Flash Flood Warnings in Texas, 2015Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.