Alert archive / Texas / Flash Flood Warnings in 2014

Flash Flood Warning 66, NWS Austin/San Antonio, TX

November 22, 2014Hays County, Travis County, Williamson County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Nov 22, 2014, 7:21 PM CST for Hays County, Travis County, Williamson County, Texas. It was in force for 3 hr. 3 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: Nov 22, 2014, 7:21 PM CST (01:21 UTC)
Expired: Nov 22, 2014, 10:15 PM CST
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: None

Counties Hays County, TX, Travis County, TX, Williamson County, TX

The radar

The Ft Hood radar (KGRK), 57 km from the middle of the area, began a volume at 01:24 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
Nov 22, 8:35 PM CST	FLASH FLOOD	2 Wnw Sunset Valley, TX	LOW WATER CROSSING CLOSED AT OLD BEE CAVES ROAD AND JOE TANNER LANE
Nov 22, 9:15 PM CST	FLASH FLOOD	1 Ene San Leanna, TX	AUSTIN FIRE DEPARTMENT PERFORMED WATER RESCUES FOR THREE PEOPLE TRAPPED IN VEHICLE ON OLD SAN ANTONIO ROAD.
Nov 22, 10:16 PM CST	FLASH FLOOD	3 Wnw Sunset Valley, TX	LOW WATER CROSSING ON JOE TANNER LANE CLOSED DUE TO FLOODING. DELAYED REPORT.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Fort Worth, TX (KFWD), launched 00:00Z, 1.4 hours before the alert went out and 279 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: 19 J/kg
Mixed-layer CIN: -33 J/kg
Mixed-layer LCL: 679 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 141 m²/s²
0-3 km storm-relative helicity: 192 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

083 
WGUS54 KEWX 230121
FFWEWX
TXC209-453-491-230415-
/O.NEW.KEWX.FF.W.0066.141123T0121Z-141123T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
721 PM CST SAT NOV 22 2014

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  HAYS COUNTY IN SOUTH CENTRAL TEXAS...
  THIS INCLUDES THE CITIES OF...WIMBERLEY...SAN MARCOS...DRIPPING
  SPRINGS...
  TRAVIS COUNTY IN SOUTH CENTRAL TEXAS...
  THIS INCLUDES THE CITIES OF...AUSTIN...TANGLEWOOD FOREST...
  PFLUGERVILLE...
  WILLIAMSON COUNTY IN SOUTH CENTRAL TEXAS...
  THIS INCLUDES THE CITIES OF...TAYLOR...ROUND ROCK...
  GRANGER...GEORGETOWN AND CEDAR PARK...

* UNTIL 1015 PM CST

* AT 708 PM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
  DETERMINED THAT THUNDERSTORMS PRODUCING HEAVY RAINFALL WILL 
  RESULT IN FLASH FLOODING ACROSS MUCH OF HAYS...TRAVIS AND 
  WILLIAMSON COUNTIES. THE HEAVY RAINS RECEIVED EARLIER TODAY ALONG
  WITH AN ADDITIONAL 1 TO 2 INCHES OF RAINFALL WILL MAKE RAPID FLASH 
  FLOODING POSSIBLE. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO AUSTIN...
  GEORGETOWN...WIMBERLEY...SUN CITY...LIBERTY HILL...LEANDER...
  JARRELL...HUTTO...GRANGER DAM... GEORGETOWN DAM...FLORENCE...
  PFLUGERVILLE...INTERSTATE 35 AND HIGHWAY 71.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW
LYING AREAS ARE SUBJECT TO FLOODING.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

&&

LAT...LON 2982 9798 3005 9828 3027 9819 3077 9794
      3090 9784 3087 9765 3072 9728 3045 9741
      3025 9752 3004 9773

$$

2 follow-up statements

633 
WGUS74 KEWX 230221
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
821 PM CST SAT NOV 22 2014

TXC209-453-491-230415-
/O.CON.KEWX.FF.W.0066.000000T0000Z-141123T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAYS TX-TRAVIS TX-WILLIAMSON TX-
821 PM CST SAT NOV 22 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM CST FOR
WILLIAMSON...TRAVIS AND HAYS COUNTIES...

AT 803 PM CST...NWS METEOROLOGISTS CONTINUED TO DETECT A LINE OF  
THUNDERSTORMS TRAINING AND PRODUCING FLASH FLOODING OVER THE WARNED 
AREA...WHICH INCLUDES NEARLY ALL OF TRAVIS...WILLIAMSON...AND HAYS 
COUNTIES. RADAR ESTIMATES AND SURFACE OBSERVATIONS SUGGEST THAT 3 TO 
5 INCHES OF RAIN HAVE ALREADY FALLEN OVER THIS AREA. THE SLOW MOVING 
LINE OF THUNDERSTORMS SUGGESTS THAT AN ADDITIONAL 1 TO 2 INCHES OF 
RAIN COULD FALL BY 930 PM CDT.

DUE TO EARLIER HEAVY RAINS...LARGER CREEKS AND STREAMS...SUCH AS 
ONION CREEK...BRUSHY CREEK... AND WILLIAMSON CREEK ARE EXPECTED TO 
SEE NEW RISES AND WILL LIKELY EXCEED BANKFULL...RESULTING IN 
NUMEROUS CLOSURES OF SECONDARY ROADS AND LOW WATER CROSSINGS. 

OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SUN 
CITY...LIBERTY HILL...WINDEMERE...PFLUGERVILLE...LAGO VISTA...WEIR...
TAYLOR...SERENADA...ROUND ROCK...LEANDER...JARRELL...HUTTO...GRANGER 
DAM...GRANGER...GEORGETOWN DAM...GEORGETOWN...FLORENCE...CEDAR 
PARK...ANDICE AND ANDERSON MILL.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 2982 9798 3005 9828 3027 9819 3077 9794
      3090 9784 3087 9765 3072 9728 3045 9741
      3025 9752 3004 9773

$$

628 
WGUS74 KEWX 230347
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
947 PM CST SAT NOV 22 2014

TXC209-453-491-230415-
/O.CON.KEWX.FF.W.0066.000000T0000Z-141123T0415Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
HAYS TX-TRAVIS TX-WILLIAMSON TX-
947 PM CST SAT NOV 22 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1015 PM CST FOR
WILLIAMSON...TRAVIS AND HAYS COUNTIES...

AT 943 PM CST...NWS METEOROLOGISTS CONTINUED TO DETECT MODERATE 
RAINFALL ACROSS THE WARNED AREA. ALTHOUGH THE HEAVY RAIN HAS SHIFTED 
EAST OF THE AREA...CONTINUED RUN OFF FROM THE HEAVY RAIN AND 
CONTINUED MODERATE RAIN WILL CONTINUE TO POSE A FLASH FLOOD THREAT. 
THERE HAVE BEEN SEVERAL WATER RESCUES IN THE CITY OF AUSTIN AND 
MOTORISTS ARE URGED TO EXERCISE EXTREME CAUTION ON ROADWAYS. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SUN CITY...
LIBERTY HILL...WINDEMERE...PFLUGERVILLE...LAGO VISTA...WEIR...
TAYLOR...SERENADA...ROUND ROCK...LEANDER...JARRELL...HUTTO...GRANGER
DAM...GRANGER...GEORGETOWN DAM...GEORGETOWN...FLORENCE...CEDAR
PARK...ANDICE AND ANDERSON MILL

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 2982 9798 3005 9828 3027 9819 3077 9794
      3090 9784 3087 9765 3072 9728 3045 9741
      3025 9752 3004 9773

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Nov 22, 6:06 PM CST	Special Weather Statement	EWX	Zavala	54 min
Nov 22, 6:10 PM CST	Special Weather Statement	EWX	Bandera, Medina, Real, Uvalde	65 min
Nov 22, 6:15 PM CST	Severe Thunderstorm Warning	EWX	Dimmit, Maverick	60 min
Nov 22, 6:34 PM CST	Severe Thunderstorm Warning	EWX	Dimmit, Zavala	56 min
Nov 22, 6:43 PM CST	Areal Flood Advisory	EWX	Travis, Williamson	107 min
Nov 22, 6:44 PM CST	Special Weather Statement	EWX	Hays, Williamson	61 min
Nov 22, 6:54 PM CST	Special Weather Statement	EWX	Bandera, Bexar, Frio, Kendall, Medina	66 min
Nov 22, 6:56 PM CST	Areal Flood Advisory	EWX	Blanco, Hays	3 hr
Nov 22, 7:16 PM CST	Special Weather Statement	EWX	Comal	59 min
Nov 22, 7:21 PM CST	Special Weather Statement	EWX	Bexar, Frio, Kendall, Medina	54 min
Nov 22, 7:32 PM CST	Areal Flood Advisory	EWX	Bexar	3 hr
Nov 22, 7:34 PM CST	Special Weather Statement	EWX	Hays, Travis, Williamson	56 min
Nov 22, 7:53 PM CST	Special Weather Statement	EWX	Atascosa, Karnes, Wilson	52 min
Nov 22, 7:55 PM CST	Flash Flood Warning	EWX	Bexar	3 hr
Nov 22, 7:56 PM CST	Special Weather Statement	EWX	Bexar, Comal	49 min
Nov 22, 8:01 PM CST	Severe Thunderstorm Warning	EWX	Bexar, Comal, Guadalupe, Karnes, Wilson	59 min
Nov 22, 8:08 PM CST	Severe Thunderstorm Warning	EWX	Atascosa, Karnes, Wilson	52 min
Nov 22, 8:12 PM CST	Flash Flood Warning	EWX	Comal, Guadalupe	3 hr
Nov 22, 8:27 PM CST	Special Weather Statement	EWX	Bastrop, Caldwell, Comal, Hays, Travis, Williamson	63 min
Nov 22, 8:43 PM CST	Severe Thunderstorm Warning	EWX	Caldwell, Comal, DeWitt, Gonzales, Guadalupe, Hays and 2 more	62 min
Nov 22, 9:28 PM CST	Severe Thunderstorm Warning	EWX	Bastrop, Caldwell, DeWitt, Fayette, Gonzales, Lavaca	62 min
Nov 22, 9:40 PM CST	Areal Flood Advisory	EWX	Bastrop, Lee	110 min
Nov 22, 10:08 PM CST	Flash Flood Warning	EWX	Travis, Williamson	112 min
Nov 22, 10:59 PM CST	River Flood Warning	EWX	Travis	15 hr

Nearby

Flash Flood Warnings in Texas, 2014 Every flash flood warning in 2014

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.