Alert archive / Texas / Flash Flood Warnings in 2016

Flash Flood Warning 46, NWS Austin/San Antonio, TX

May 31, 2016Llano County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 31, 2016, 12:05 PM CDT for Llano 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, 12:05 PM CDT (17:05 UTC)
Expired: May 31, 2016, 3:00 PM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: None

County Llano County, TX

The radar

The Ft Hood radar (KGRK), 108 km from the middle of the area, began a volume at 17:08 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, 1:15 PM CDT	FLASH FLOOD	5 E Castell, TX	RANCH ROAD 152 CLOSED DUE TO FLOODING WEST OF THE CITY OF LLANO. THE ROAD RUNS ALONG THE LLANO RIVER.

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 12:00Z, 5.1 hours before the alert went out and 252 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: 1719 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 959 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

060 
WGUS54 KEWX 311705
FFWEWX
TXC299-312000-
/O.NEW.KEWX.FF.W.0046.160531T1705Z-160531T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1205 PM CDT TUE MAY 31 2016

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN LLANO COUNTY IN SOUTH CENTRAL TEXAS...

* UNTIL 300 PM CDT

* AT 1203 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
  HEAVY RAIN ACROSS THE WARNED AREA. UP TO TWO INCHES OF RAIN HAVE
  ALREADY FALLEN. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  LLANO...BUCHANAN DAM...FIELD CREEK...BLUFFTON...VALLEY SPRING...STOLZ...
  CASTELL...TOW...LONE GROVE AND BABY HEAD.

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.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 3088 9846 3086 9842 3083 9842 3084 9840
      3084 9838 3082 9838 3082 9841 3080 9841
      3079 9843 3077 9843 3069 9868 3063 9896
      3092 9896 3092 9845

$$

PLATT

2 follow-up statements

211 
WGUS74 KEWX 311812
FFSEWX

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

TXC299-312000-
/O.CON.KEWX.FF.W.0046.000000T0000Z-160531T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LLANO TX-
112 PM CDT TUE MAY 31 2016

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 300 PM CDT FOR
NORTHERN LLANO COUNTY...

AT 105 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING
HEAVY RAIN ACROSS THE WARNED AREA. UP TO 2.5 INCHES OF RAIN HAVE
ALREADY FALLEN 14 MILES NORTHWEST OF LLANO. FLASH FLOODING IS
EXPECTED TO BEGIN SHORTLY.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
LLANO...BUCHANAN DAM...FIELD CREEK...BLUFFTON...VALLEY SPRING...STOLZ...
CASTELL...TOW...LONE GROVE AND BABY HEAD.

ADDITIONAL RAINFALL AMOUNTS OF UP TO ONE AND ONE HALF INCHES ARE
POSSIBLE IN THE WARNED AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

PLEASE REPORT FLOODING TO YOUR LOCAL LAW ENFORCEMENT AGENCY WHEN YOU
CAN DO SO SAFELY.

&&

LAT...LON 3088 9846 3086 9842 3083 9842 3084 9840
      3084 9838 3082 9838 3082 9841 3080 9841
      3079 9843 3077 9843 3069 9868 3063 9896
      3092 9896 3092 9845

$$

PLATT

103 
WGUS74 KEWX 311959
FFSEWX

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

TXC299-312005-
/O.EXP.KEWX.FF.W.0046.000000T0000Z-160531T2000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LLANO TX-
259 PM CDT TUE MAY 31 2016

...THE FLASH FLOOD WARNING FOR NORTHERN LLANO COUNTY WILL EXPIRE AT
300 PM CDT...

HEAVY RAINFALL HAS DECREASED OVER NORTHERN LLANO COUNTY. HOWEVER...
RUNOFF FROM EARLIER HEAVY RAINFALL WILL CONTINUE THROUGH THIS AFTERNOON. 
PLEASE USE CAUTION WHILE DRIVING IN THE AREA TODAY.
PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES. 

LAT...LON 3088 9846 3086 9842 3083 9842 3084 9840
      3084 9838 3082 9838 3082 9841 3080 9841
      3079 9843 3077 9843 3069 9868 3063 9896
      3092 9896 3092 9845

$$

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, 12:29 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, 3:24 PM CDT	Flash Flood Warning	EWX	Bexar	3 hr
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.