Alert archive / Texas / Flash Flood Warnings in 2016

Flash Flood Warning 69, NWS Austin/San Antonio, TX

August 16, 20164 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Aug 16, 2016, 4:50 PM CDT for 4 counties in Texas. It was in force for 115 min. 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 16, 2016, 4:50 PM CDT (21:50 UTC)
Expired: Aug 16, 2016, 6:45 PM CDT
In force: 115 min
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: None

Counties Bandera County, TX, Bexar County, TX, Kendall County, TX, Medina County, TX

The radar

The Austin/San Antonio radar (KEWX), 59 km from the middle of the area, began a volume at 21:53 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 16, 6:22 PM CDT	FLASH FLOOD	2 Ssw Sea World, TX	WATER OVER THE ROADWAY ON POTRANCO ROAD NEAR LOOP 1604 DUE TO FLOODING FROM CARACOL CREEK

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, 9.8 hours before the alert went out and 215 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: 2 J/kg
Mixed-layer CIN: -126 J/kg
Mixed-layer LCL: 805 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: -19 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

629 
WGUS54 KEWX 162150
FFWEWX
TXC019-029-259-325-162345-
/O.NEW.KEWX.FF.W.0069.160816T2150Z-160816T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  WESTERN BEXAR COUNTY IN SOUTH CENTRAL TEXAS...
  SOUTHWESTERN KENDALL COUNTY IN SOUTH CENTRAL TEXAS...
  SOUTHEASTERN BANDERA COUNTY IN SOUTH CENTRAL TEXAS...
  EAST CENTRAL MEDINA COUNTY IN SOUTH CENTRAL TEXAS...

* UNTIL 645 PM CDT

* AT 448 PM CDT...DOPPLER RADAR INDICATED SHOWERS AND ISOLATED
  THUNDERSTORMS PRODUCING EMBEDDED HEAVY RAIN ACROSS THE WARNED
  AREA. BETWEEN 1 AND 2 INCHES OF RAIN HAS FALLEN ACROSS THE
  AREA...WITH ISOLATED SPOTS ESTIMATED UP TO 3 INCHES ACROSS FAR
  SOUTHWEST AND NORTHWEST BEXAR COUNTY. AN ADDITIONAL 1 TO 2 INCHES
  IS POSSIBLE IN HEAVIER SHOWERS AND STORMS OVER THE NEXT 2 HOURS.
  FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SAN ANTONIO...BOERNE...CASTROVILLE...LEON VALLEY...HELOTES...
  FAIR OAKS RANCH...HOLLYWOOD PARK...SHAVANO PARK...LYTLE...
  LACOSTE...LEON SPRINGS...SEA WORLD...TIMBERWOOD PARK...
  CROSS MOUNTAIN...BERGHEIM...THE DOMINION...CLIFF...LACKLAND AFB...
  CASTLE HILLS AND BALCONES HEIGHTS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 2927 9886 2984 9892 2984 9854 2974 9865
      2974 9861 2975 9860 2974 9858 2976 9855
      2974 9853 2973 9845 2961 9837 2945 9858
      2934 9868 2921 9869

$$

RUNYEN

1 follow-up statement

778 
WGUS74 KEWX 162304
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
604 PM CDT TUE AUG 16 2016

TXC019-029-259-325-162345-
/O.CON.KEWX.FF.W.0069.000000T0000Z-160816T2345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BEXAR TX-KENDALL TX-BANDERA TX-MEDINA TX-
604 PM CDT TUE AUG 16 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 645 PM CDT FOR
WESTERN BEXAR...SOUTHWESTERN KENDALL...SOUTHEASTERN BANDERA AND EAST
CENTRAL MEDINA COUNTIES...

AT 600 PM CDT...DOPPLER RADAR INDICATED SHOWERS WITH MODERATE
RAINFALL OCCURRING. UP TO AN ADDITIONAL 1/4 TO 1/2 INCH OF RAINFALL
IS EXPECTED BEFORE SHOWERS END. BETWEEN 1 AND 3 INCHES OF RAIN HAS
OCCURRED THE PAST TWO HOURS AND SEVERAL MORE INCHES HAVE OCCURRED
OVER THE PAST FEW DAYS...LEAVING SOIL CONDITIONS SATURATED.

DESPITE RAINFALL GRADUALLY ENDING...FLASH FLOODING WILL STILL BE
LIKELY IN SOME SPOTS AS RAINFALL CONTINUES TO RUNOFF INTO
CREEKS...STREAMS AND LOW WATER CROSSINGS. MOTORISTS SHOULD USE
EXTREME CAUTION DURING THE EVENING RUSH HOUR AND BE ALERT FOR
FLOODED LOW WATER CROSSINGS.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
SAN ANTONIO...BOERNE...CASTROVILLE...LEON VALLEY...HELOTES...
FAIR OAKS RANCH...HOLLYWOOD PARK...SHAVANO PARK...LYTLE...LACOSTE...
LEON SPRINGS...SEA WORLD...TIMBERWOOD PARK...CROSS MOUNTAIN...
BERGHEIM...THE DOMINION...CLIFF...LACKLAND AFB...
CASTLE HILLS AND BALCONES HEIGHTS.

LAT...LON 2927 9886 2984 9892 2984 9854 2974 9865
      2974 9861 2975 9860 2974 9858 2976 9855
      2974 9853 2973 9845 2961 9837 2945 9858
      2934 9868 2921 9869

$$

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, 3:43 AM CDT	Areal Flood Advisory	EWX	Comal, Hays	107 min
Aug 16, 5:38 AM CDT	Areal Flood Advisory	EWX	Blanco, Burnet, Comal, Hays, Travis	3 hr
Aug 16, 6:34 AM CDT	Flash Flood Warning	EWX	Blanco, Burnet, Hays, Travis	3 hr
Aug 16, 7:58 AM CDT	Flash Flood Warning	EWX	Burnet, Travis, Williamson	3 hr
Aug 16, 8:51 AM CDT	Areal Flood Advisory	EWX	Dimmit, Zavala	3 hr
Aug 16, 10:52 AM CDT	Areal Flood Advisory	EWX	Burnet, Williamson	3 hr
Aug 16, 12:56 PM CDT	Areal Flood Advisory	EWX	Atascosa, Karnes	3 hr
Aug 16, 1:37 PM CDT	Areal Flood Advisory	EWX	Williamson	3 hr
Aug 16, 1:50 PM CDT	Areal Flood Advisory	EWX	Hays, Travis	3 hr
Aug 16, 2:09 PM CDT	River Flood Warning	EWX	Travis	30 hr
Aug 16, 2:26 PM CDT	Areal Flood Advisory	EWX	Atascosa, Bandera, Bexar, Blanco, Comal, Frio and 5 more	3 hr
Aug 16, 2:56 PM CDT	Flash Flood Warning	EWX	Hays, Travis, Williamson	3 hr
Aug 16, 3:16 PM CDT	Areal Flood Advisory	EWX	Bastrop, Caldwell, Travis	3 hr
Aug 16, 4:12 PM CDT	River Flood Warning	EWX	Williamson	16 hr
Aug 16, 4:18 PM CDT	Flash Flood Warning	EWX	Bastrop, Caldwell, DeWitt, Fayette, Gonzales, Lavaca and 2 more	3 hr
Aug 16, 5:45 PM CDT	Flash Flood Warning	EWX	Travis	2 hr
Aug 16, 6:47 PM CDT	Areal Flood Advisory	EWX	Bexar	58 min

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.