Alert archive / Texas / Flash Flood Warnings in 2016

Flash Flood Warning 50, NWS Austin/San Antonio, TX

May 31, 2016Bexar County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 31, 2016, 3:24 PM CDT for Bexar 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: May 31, 2016, 3:24 PM CDT (20:24 UTC)
Expired: May 31, 2016, 6:30 PM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: None

County Bexar County, TX

The radar

The Austin/San Antonio radar (KEWX), 40 km from the middle of the area, began a volume at 20:25 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
May 31, 3:38 PM CDT	FLASH FLOOD	2 W Live Oak, TX	OLD OCONNOR RD AT LOOKOUT RD CLOSED DUE TO FLASH 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, 8.4 hours before the alert went out and 231 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: 2719 J/kg
Mixed-layer CIN: -3 J/kg
Mixed-layer LCL: 624 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 8 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

429 
WGUS54 KEWX 312024
FFWEWX
TXC029-312330-
/O.NEW.KEWX.FF.W.0050.160531T2024Z-160531T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
324 PM CDT TUE MAY 31 2016

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  BEXAR COUNTY IN SOUTH CENTRAL TEXAS...

* UNTIL 630 PM CDT

* AT 323 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO ONE AND ONE HALF INCHES
  OF RAIN HAS ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  SAN ANTONIO...UNIVERSAL CITY...SCHERTZ...LIVE OAK...LEON VALLEY...KIRBY...
  HELOTES...ALAMO HEIGHTS...FAIR OAKS RANCH...SELMA...WINDCREST...TERRELL
  HILLS...HOLLYWOOD PARK...SHAVANO PARK...LYTLE...OLMOS PARK...ST. HEDWIG...
  SOMERSET...ELMENDORF AND NEW BERLIN.

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.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS...AND UNDERPASSES
AS WELL AS OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

STAY AWAY OR BE SWEPT AWAY. RIVER BANKS AND CULVERTS CAN BECOME
UNSTABLE AND UNSAFE.

&&

LAT...LON 2925 9880 2969 9881 2972 9878 2976 9855
      2971 9843 2975 9841 2972 9838 2973 9835
      2970 9836 2970 9838 2967 9838 2965 9834
      2962 9834 2956 9830 2954 9826 2955 9823
      2949 9819 2948 9812 2945 9812 2911 9841

$$

PLATT

1 follow-up statement

328 
WGUS74 KEWX 312323
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
623 PM CDT TUE MAY 31 2016

TXC029-312331-
/O.EXP.KEWX.FF.W.0050.000000T0000Z-160531T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BEXAR TX-
623 PM CDT TUE MAY 31 2016

...THE FLASH FLOOD WARNING FOR BEXAR COUNTY WILL EXPIRE AT 630 PM
CDT...

HEAVY RAINFALL HAS ENDED OVER BEXAR COUNTY AND FLASH FLOODING IS NO
LONGER EXPECTED TO POSE A THREAT. HOWEVER...RUNOFF FROM EARLIER
HEAVY RAINFALL WILL CONTINUE THROUGH THIS EVENING. PLEASE USE
CAUTION WHILE DRIVING AND CONTINUE TO HEED ANY REMAINING ROAD
CLOSURES.

LAT...LON 2925 9880 2969 9881 2972 9878 2976 9855
      2971 9843 2975 9841 2972 9838 2973 9835
      2970 9836 2970 9838 2967 9838 2965 9834
      2962 9834 2956 9830 2954 9826 2955 9823
      2949 9819 2948 9812 2945 9812 2911 9841

$$

PLATT

The office that day

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

Issued	Product	Office	Counties	Lasted
May 30, 10:00 PM CDT	River Flood Warning	EWX	Bexar, Wilson	15 hr
May 31, 10:42 AM CDT	Special Weather Statement	EWX	Llano	48 min
May 31, 10:52 AM CDT	Flash Flood Watch	EWX	Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 27 more	4 days
May 31, 11:31 AM CDT	Areal Flood Advisory	EWX	Llano	3 hr
May 31, 11:52 AM CDT	Areal Flood Advisory	EWX	Edwards, Kerr, Real	3 hr
May 31, 12:05 PM CDT	Flash Flood Warning	EWX	Llano	3 hr
May 31, 12:29 PM CDT	Flash Flood Warning	EWX	Bandera, Gillespie, Kerr, Real	3 hr
May 31, 12:58 PM CDT	Flash Flood Warning	EWX	Medina, Uvalde	4 hr
May 31, 1:55 PM CDT	Special Weather Statement	EWX	Blanco	50 min
May 31, 2:05 PM CDT	Areal Flood Advisory	EWX	Bexar	3 hr
May 31, 2:15 PM CDT	Areal Flood Advisory	EWX	Blanco, Burnet, Gillespie, Kendall, Llano	3 hr
May 31, 2:21 PM CDT	River Flood Warning	EWX	Llano	20 hr
May 31, 2:25 PM CDT	River Flood Warning	EWX	Bandera	22 hr
May 31, 2:25 PM CDT	River Flood Warning	EWX	Bexar	4 days
May 31, 2:25 PM CDT	Special Weather Statement	EWX	Medina	50 min
May 31, 2:32 PM CDT	Areal Flood Advisory	EWX	Comal	3 hr
May 31, 2:35 PM CDT	River Flood Warning	EWX	Fayette	4 days
May 31, 2:40 PM CDT	Special Weather Statement	EWX	Hays	50 min
May 31, 2:53 PM CDT	Flash Flood Warning	EWX	Comal	3 hr
May 31, 2:56 PM CDT	Severe Thunderstorm Warning	EWX	Caldwell, Comal, Guadalupe, Hays	64 min
May 31, 3:05 PM CDT	Special Weather Statement	EWX	Medina	40 min
May 31, 3:10 PM CDT	Special Weather Statement	EWX	Wilson	65 min
May 31, 3:54 PM CDT	Areal Flood Advisory	EWX	Guadalupe	3 hr
May 31, 3:57 PM CDT	Special Weather Statement	EWX	Caldwell	48 min
May 31, 3:58 PM CDT	River Flood Warning	EWX	Comal, Guadalupe	18 hr
May 31, 4:01 PM CDT	River Flood Warning	EWX	Comal, Guadalupe	22 hr
May 31, 4:05 PM CDT	Special Weather Statement	EWX	Gonzales	40 min
May 31, 4:10 PM CDT	Areal Flood Advisory	EWX	Hays, Travis	3 hr
May 31, 4:15 PM CDT	Areal Flood Advisory	EWX	Caldwell	3 hr
May 31, 4:22 PM CDT	Special Weather Statement	EWX	Bastrop, Gonzales	38 min
May 31, 4:31 PM CDT	Special Weather Statement	EWX	Wilson	44 min
May 31, 4:34 PM CDT	Areal Flood Advisory	EWX	Williamson	3 hr
May 31, 4:52 PM CDT	Areal Flood Advisory	EWX	Atascosa, Gonzales, Karnes, Wilson	3 hr
May 31, 4:52 PM CDT	River Flood Warning	EWX	Llano	16 hr
May 31, 4:56 PM CDT	Severe Thunderstorm Warning	EWX	Karnes, Wilson	32 min
May 31, 5:13 PM CDT	Areal Flood Advisory	EWX	Bastrop, Fayette, Lee, Williamson	3 hr
May 31, 5:29 PM CDT	River Flood Warning	EWX	Blanco	20 hr
May 31, 5:29 PM CDT	Special Weather Statement	EWX	Karnes	46 min
May 31, 5:50 PM CDT	Flash Flood Warning	EWX	Fayette	3 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.