Alert archive / Texas / Flash Flood Warnings in 2016

Flash Flood Warning 71, NWS Austin/San Antonio, TX

August 16, 2016Travis County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Aug 16, 2016, 11:48 PM CDT for Travis County, Texas. It was in force for 3 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
Aug 16, 2016, 11:48 PM CDT (04:48 UTC)
Expired
Aug 17, 2016, 2:45 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon
Flood severity
None

County Travis County, TX

The radar

The Ft Hood radar (KGRK), 67 km from the middle of the area, began a volume at 04:50 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

Fort Worth, TX (KFWD), launched 00:00Z, 4.8 hours before the alert went out and 285 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, Fort Worth, TX at 00:00Z on 2016-08-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 50 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, Fort Worth, TX at 00:00Z on 2016-08-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -1 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
50 J/kg
Mixed-layer CIN
-41 J/kg
Mixed-layer LCL
987 m above ground
0-6 km bulk shear
15 kt
0-1 km storm-relative helicity
-1 m²/s²
0-3 km storm-relative helicity
-11 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

357 
WGUS54 KEWX 170448
FFWEWX
TXC453-170745-
/O.NEW.KEWX.FF.W.0071.160817T0448Z-160817T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1148 PM CDT TUE AUG 16 2016

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 245 AM CDT

* AT 1147 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN IN SOUTHWEST TRAVIS COUNTY. BETWEEN 1 AND 2 INCHES OF
  RAIN HAS ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN
  SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  AUSTIN...LAKEWAY...LAGO VISTA...BEE CAVE...WEST LAKE HILLS...
  THE HILLS...MANSFIELD DAM...HUDSON BEND...SHADY HOLLOW...
  BARTON CREEK...JONESTOWN AND LOST CREEK.

ADDITIONAL RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE IN THE
WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 3036 9780 3013 9785 3028 9807 3050 9800

$$

RUNYEN
1 follow-up statement
341 
WGUS74 KEWX 170554
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1254 AM CDT WED AUG 17 2016

TXC453-170745-
/O.CON.KEWX.FF.W.0071.000000T0000Z-160817T0745Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
TRAVIS TX-
1254 AM CDT WED AUG 17 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 245 AM CDT FOR
SOUTHWESTERN TRAVIS COUNTY...

AT 1251 AM CDT...DOPPLER RADAR ESTIMATES BETWEEN 1 AND 2 INCHES OF
RAINFALL HAS OCCURRED ACROSS SOUTHWESTERN TRAVIS COUNTY. RAINFALL
RATES WILL CONTINUE TO DIMINISH WITH AN ADDITIONAL 1/4 TO 1/2 INCH
POSSIBLE OVER PORTIONS OF THE AREA. DESPITE RAINFALL INTENSITY
DIMINISHING...FLASH FLOODING IS STILL POSSIBLE AS EARLIER HEAVY
RAINFALL RUNS OFF.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
LAKEWAY...LAGO VISTA...BEE CAVE...WEST LAKE HILLS...THE HILLS...
MANSFIELD DAM...HUDSON BEND...SHADY HOLLOW...BARTON CREEK...
JONESTOWN AND LOST CREEK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST
FLOOD DEATHS OCCUR IN VEHICLES.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING.

&&

LAT...LON 3036 9780 3013 9785 3028 9807 3050 9800

$$

RUNYEN

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 16, 7:16 PM CDTAreal Flood AdvisoryEWXBastrop, Lee, Williamson119 min
Aug 16, 9:25 PM CDTRiver Flood WarningEWXTravis14 hr
Aug 16, 10:58 PM CDTAreal Flood AdvisoryEWXTravis2 hr
Aug 17, 12:31 AM CDTFlash Flood WarningEWXBurnet, Travis3 hr
Aug 17, 2:01 AM CDTAreal Flood AdvisoryEWXBurnet3 hr
Aug 17, 3:56 AM CDTAreal Flood AdvisoryEWXBexar2 hr
Aug 17, 4:12 AM CDTAreal Flood AdvisoryEWXWilliamson2 hr
Aug 17, 6:37 AM CDTRiver Flood WarningEWXTravis16 hr
Aug 17, 12:03 PM CDTAreal Flood AdvisoryEWXBastrop, Caldwell, Travis, Williamson3 hr
Aug 17, 4:49 PM CDTAreal Flood AdvisoryEWXKendall116 min
Aug 17, 4:59 PM CDTAreal Flood AdvisoryEWXBexar2 hr
Aug 17, 5:41 PM CDTAreal Flood AdvisoryEWXLlano2 hr
Aug 17, 5:48 PM CDTAreal Flood AdvisoryEWXBandera117 min
Aug 17, 6:05 PM CDTFlash Flood WarningEWXLlano115 min
Aug 17, 6:15 PM CDTFlash Flood WarningEWXBandera, Kendall, Kerr3 hr
Aug 17, 6:43 PM CDTAreal Flood AdvisoryEWXMedina2 hr

Nearby

Flash Flood Warnings in Texas, 2016Every flash flood warning in 2016

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.