Alert archive / Texas / Flash Flood Warnings in 2016

Flash Flood Warning 74, NWS Austin/San Antonio, TX

August 17, 2016Bandera County, Kendall County, Kerr County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Aug 17, 2016, 6:15 PM CDT for Bandera County, Kendall County, Kerr County, Texas. It was in force for 3 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: Aug 17, 2016, 6:15 PM CDT (23:15 UTC)
Expired: Aug 17, 2016, 9:15 PM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: None

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

The radar

The Austin/San Antonio radar (KEWX), 72 km from the middle of the area, began a volume at 23:14 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
Aug 17, 7:02 PM CDT	FLASH FLOOD	2 Wnw Bandera, TX	SH16 NEAR MANSFIELD PARK CLOSED DUE TO FLOODING. A FEW OTHER COUNTY ROADS WERE BEGINNING TO EXPERIENCE FLOODING OF LOW WATER CROSSINGS.

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

The nearest sounding before it

Del Rio, TX (KDLF), launched 12:00Z, 11.3 hours before the alert went out and 207 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: 686 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 578 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 47 m²/s²
0-3 km storm-relative helicity: 60 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

056 
WGUS54 KEWX 172315
FFWEWX
TXC019-259-265-180215-
/O.NEW.KEWX.FF.W.0074.160817T2315Z-160818T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
615 PM CDT WED AUG 17 2016

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN KERR COUNTY IN SOUTH CENTRAL TEXAS...
  KENDALL COUNTY IN SOUTH CENTRAL TEXAS...
  CENTRAL BANDERA COUNTY IN SOUTH CENTRAL TEXAS...

* UNTIL 915 PM CDT

* AT 613 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. BETWEEN 2 AND 4 INCHES OF RAIN
  IS ESTIMATED TO HAVE FALLEN ACROSS CENTRAL BANDERA COUNTY AND
  BETWEEN 1 AND 3 INCHES ACROSS PORTIONS OF KENDALL COUNTY. AN
  ADDITIONAL 1 TO 3 INCHES IS POSSIBLE OVER THE WARNED AREA.
  FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BOERNE...COMFORT...BANDERA...TARPLEY...FAIR OAKS RANCH...
  BANKERSMITH...BERGHEIM...WARING...PIPE CREEK...WALNUT GROVE...
  KENDALIA...GUADALUPE RIVER STATE PARK...WELFARE...NELSON CITY...
  KREUTZBERG...CENTER POINT...SISTERDALE...BANDERA FALLS...
  AND CAMP VERDE.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED
ROADS. FIND AN ALTERNATE ROUTE.

&&

LAT...LON 2994 9842 2975 9865 2972 9874 2972 9878
      2969 9881 2962 9898 2963 9941 3014 9881
      3014 9859

$$

RUNYEN

1 follow-up statement

895 
WGUS74 KEWX 180027
FFSEWX

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

TXC259-265-180031-
/O.CAN.KEWX.FF.W.0074.000000T0000Z-160818T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
KERR TX-KENDALL TX-
727 PM CDT WED AUG 17 2016

...THE FLASH FLOOD WARNING FOR SOUTHEASTERN KERR AND KENDALL COUNTIES
IS CANCELLED...

FLOODING IS NO LONGER EXPECTED TO POSE A THREAT. PLEASE CONTINUE TO
HEED ANY REMAINING ROAD CLOSURES.

LAT...LON 2978 9892 2971 9900 2962 9912 2963 9941
      2987 9912

$$

TXC019-180215-
/O.CON.KEWX.FF.W.0074.000000T0000Z-160818T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BANDERA TX-
727 PM CDT WED AUG 17 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR
CENTRAL BANDERA COUNTY...

AT 721 PM CDT...LOCAL LAW ENFORCEMENT REPORTED STATE HIGHWAY 16 NEAR
MANSFIELD PARK CLOSED DUE TO FLOODING. SEVERAL LOW WATER CROSSINGS
ALONG SMALLER COUNTRY ROADS WERE BEGINNING TO EXPERIENCE FLOODING
AS WELL. 

NATIONAL WEATHER SERVICE DOPPLER RADAR HAS ESTIMATED BETWEEN 3 AND 6
INCHES OF RAIN HAS FALLEN BETWEEN BANDERA AND TARPLEY. UP TO AN
ADDITIONAL 1 INCH OF RAINFALL IS POSSIBLE AS SHOWERS AND STORMS
WEAKEN.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BANDERA AND TARPLEY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO CROSS FLOODED
ROADS. FIND AN ALTERNATE ROUTE.

&&

LAT...LON 2978 9892 2971 9900 2962 9912 2963 9941
      2987 9912

$$

RUNYEN

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 16, 7:16 PM CDT	Areal Flood Advisory	EWX	Bastrop, Lee, Williamson	119 min
Aug 16, 9:25 PM CDT	River Flood Warning	EWX	Travis	14 hr
Aug 16, 10:58 PM CDT	Areal Flood Advisory	EWX	Travis	2 hr
Aug 16, 11:48 PM CDT	Flash Flood Warning	EWX	Travis	3 hr
Aug 17, 12:31 AM CDT	Flash Flood Warning	EWX	Burnet, Travis	3 hr
Aug 17, 2:01 AM CDT	Areal Flood Advisory	EWX	Burnet	3 hr
Aug 17, 3:56 AM CDT	Areal Flood Advisory	EWX	Bexar	2 hr
Aug 17, 4:12 AM CDT	Areal Flood Advisory	EWX	Williamson	2 hr
Aug 17, 6:37 AM CDT	River Flood Warning	EWX	Travis	16 hr
Aug 17, 12:03 PM CDT	Areal Flood Advisory	EWX	Bastrop, Caldwell, Travis, Williamson	3 hr
Aug 17, 4:49 PM CDT	Areal Flood Advisory	EWX	Kendall	116 min
Aug 17, 4:59 PM CDT	Areal Flood Advisory	EWX	Bexar	2 hr
Aug 17, 5:41 PM CDT	Areal Flood Advisory	EWX	Llano	2 hr
Aug 17, 5:48 PM CDT	Areal Flood Advisory	EWX	Bandera	117 min
Aug 17, 6:05 PM CDT	Flash Flood Warning	EWX	Llano	115 min
Aug 17, 6:43 PM CDT	Areal Flood Advisory	EWX	Medina	2 hr

Nearby

Flash Flood Warnings in Texas, 2016 Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.