Alert archive / Texas / Flash Flood Warnings in 2015

Flash Flood Warning 94, NWS Austin/San Antonio, TX

May 28, 20159 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 28, 2015, 11:48 PM CDT for 9 counties in Texas. It was in force for 4 hr. 3 reports 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 28, 2015, 11:48 PM CDT (04:48 UTC)
Expired: May 29, 2015, 4:15 AM CDT
In force: 4 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: None

Counties Blanco County, TX, Burnet County, TX, Comal County, TX, Gillespie County, TX, Hays County, TX, Kendall County, TX, Llano County, TX, Travis County, TX, Williamson County, TX

The radar

The Austin/San Antonio radar (KEWX), 74 km from the middle of the area, began a volume at 04:49 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 29, 1:15 AM CDT	FLASH FLOOD	Burnet, TX	HAMILTON CREEK CAUSED WATER TO GO OVER THE ROAD
May 29, 1:15 AM CDT	FLASH FLOOD	Marble Falls, TX	NUMEROUS LOW WATER CROSSINGS CLOSED IN MARBLE FALLS
May 29, 2:41 AM CDT	FLASH FLOOD	1 Sw Spring Branch, TX	1.2 FEET OF WATER REPORTED OVER ROLLING CREEK ROAD AT FAWN LANE. SEVERAL OTHER ROADS IN COMAL COUNTY CLOSED DUE TO FLOODING

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 00:00Z, 4.8 hours before the alert went out and 258 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: 2419 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1473 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 70 m²/s²
0-3 km storm-relative helicity: 108 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 4.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

843 
WGUS54 KEWX 290448
FFWEWX
TXC031-053-091-171-209-259-299-453-491-290915-
/O.NEW.KEWX.FF.W.0094.150529T0448Z-150529T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1148 PM CDT THU MAY 28 2015

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EASTERN LLANO COUNTY IN SOUTH CENTRAL TEXAS...
  COMAL COUNTY IN SOUTH CENTRAL TEXAS...
  HAYS COUNTY IN SOUTH CENTRAL TEXAS...
  BURNET COUNTY IN SOUTH CENTRAL TEXAS...
  NORTHWESTERN TRAVIS COUNTY IN SOUTH CENTRAL TEXAS...
  CENTRAL KENDALL COUNTY IN SOUTH CENTRAL TEXAS...
  BLANCO COUNTY IN SOUTH CENTRAL TEXAS...
  NORTHWESTERN WILLIAMSON COUNTY IN SOUTH CENTRAL TEXAS...
  EASTERN GILLESPIE COUNTY IN SOUTH CENTRAL TEXAS...

* UNTIL 415 AM CDT
    
* AT 1145 PM CDT...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN ACROSS THE NORTHERN AND EASTERN HILL COUNTRY. UP TO TWO 
  INCHES OF RAIN HAVE ALREADY FALLEN...AND SATURATED SOILS ALONG 
  WITH STANDING WATER IN NORMALLY DRY CREEK BEDS WILL RESULT IN 
  FLASH FLOODING WITH AS LITTLE AS 1 INCH OF RAIN.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BOERNE...KINGSLAND...MARBLE FALLS...BURNET...WIMBERLEY...DRIPPING
  SPRINGS...BLANCO...BERTRAM...ROUND MOUNTAIN...BUCHANAN DAM...CANYON
  LAKE DAM...LEANDER...GAINESVILLE...LAKEWAY...LAGO VISTA...FAIR OAKS
  RANCH...CANYON LAKE...GRANITE SHOALS...BULVERDE AND BEE CAVE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOVE TO HIGHER GROUND NOW. ACT QUICKLY TO PROTECT YOUR LIFE. BE 
ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE 
TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS 
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

&&

LAT...LON 3103 9791 3090 9782 2987 9801 2972 9838
      2973 9837 2975 9841 2972 9844 2974 9845
      2976 9855 2972 9878 2975 9884 2983 9876
      3092 9861 3092 9843 3094 9841 3096 9845
      3103 9844

$$

MO

1 follow-up statement

167 
WGUS74 KEWX 290628
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
128 AM CDT FRI MAY 29 2015

TXC031-053-091-171-209-259-299-453-491-290915-
/O.CON.KEWX.FF.W.0094.000000T0000Z-150529T0915Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LLANO TX-COMAL TX-HAYS TX-BURNET TX-TRAVIS TX-KENDALL TX-BLANCO TX-
WILLIAMSON TX-GILLESPIE TX-
128 AM CDT FRI MAY 29 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 AM CDT FOR
EASTERN LLANO...COMAL...HAYS...BURNET...NORTHWESTERN TRAVIS...CENTRAL
KENDALL...BLANCO...NORTHWESTERN WILLIAMSON AND EASTERN GILLESPIE
COUNTIES...

AT 122 AM CDT...DOPPLER RADAR INDICATED A COMPLEX OF THUNDERSTORMS 
PRODUCING MODERATE RAIN ACROSS THE NORTHERN AND EASTERN HILL 
COUNTRY. 1 TO TWO INCHES OF RAIN HAS LIKELY FALLEN OVER MOST OF THE 
AREA...WHICH WILL COMBINE WITH SATURATED SOILS AND SWOLLEN STREAMS 
TO PRODUCE FLASH FLOODING. AN ADDITIONAL 1/4 TO 1/2 INCH OF RAIN 
WILL BE POSSIBLE BEFORE RAIN CHANCES DECREASE BY 4 AM CDT.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BOERNE...KINGSLAND...MARBLE FALLS...BURNET...WIMBERLEY...DRIPPING
SPRINGS...BLANCO...BERTRAM...ROUND MOUNTAIN...BUCHANAN DAM...CANYON
LAKE DAM...LEANDER...GAINESVILLE...LAKEWAY...LAGO VISTA...FAIR OAKS
RANCH...CANYON LAKE...GRANITE SHOALS...BULVERDE AND BEE CAVE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE 
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE 
TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS 
SUBJECT TO FLOODING WHEN WATER BEGINS RISING. TURN AROUND...DONT 
DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN 
VEHICLES.

&&

LAT...LON 3103 9791 3090 9782 2987 9801 2972 9838
      2973 9837 2975 9841 2972 9844 2974 9845
      2976 9855 2972 9878 2975 9884 2983 9876
      3092 9861 3092 9843 3094 9841 3096 9845
      3103 9844

$$

MO

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 8:35 PM CDT	Special Weather Statement	EWX	Val Verde	40 min
May 28, 9:00 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	75 min
May 28, 9:28 PM CDT	Special Weather Statement	EWX	Edwards	47 min
May 28, 9:37 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kerr, Real, Val Verde	68 min
May 28, 9:57 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kinney, Real, Uvalde, Val Verde	93 min
May 28, 10:23 PM CDT	Areal Flood Advisory	EWX	Edwards, Val Verde	4 hr
May 28, 10:24 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Kerr, Llano	81 min
May 28, 10:49 PM CDT	Special Weather Statement	EWX	Bandera	41 min
May 28, 10:55 PM CDT	Severe Thunderstorm Warning	EWX	Bandera	65 min
May 28, 11:05 PM CDT	Flash Flood Warning	EWX	Edwards, Gillespie, Kerr, Llano, Real	4 hr
May 28, 11:16 PM CDT	Severe Thunderstorm Warning	EWX	Blanco, Burnet, Kendall	89 min
May 28, 11:23 PM CDT	Special Weather Statement	EWX	Maverick, Uvalde, Zavala	52 min
May 28, 11:31 PM CDT	Flash Flood Warning	EWX	Bandera, Kendall, Kerr, Medina, Real, Uvalde	4 hr
May 28, 11:36 PM CDT	Areal Flood Advisory	EWX	Edwards, Kinney, Real, Uvalde, Val Verde	4 hr
May 28, 11:58 PM CDT	Severe Thunderstorm Warning	EWX	Bexar, Comal, Medina	92 min
May 29, 12:03 AM CDT	Severe Thunderstorm Warning	EWX	Hays, Travis, Williamson	87 min
May 29, 12:13 AM CDT	Flash Flood Warning	EWX	Bandera, Bexar, Medina, Uvalde	4 hr
May 29, 12:39 AM CDT	Severe Thunderstorm Warning	EWX	Caldwell, Guadalupe	81 min
May 29, 12:51 AM CDT	Severe Thunderstorm Warning	EWX	Atascosa, Frio, Wilson	84 min
May 29, 12:53 AM CDT	Flash Flood Warning	EWX	Bastrop, Caldwell, Comal, Guadalupe, Hays, Travis and 1 more	4 hr
May 29, 1:04 AM CDT	Severe Thunderstorm Warning	EWX	Bastrop, Lee	41 min
May 29, 1:19 AM CDT	Areal Flood Advisory	EWX	Atascosa, Bexar, Frio, Medina, Wilson, Zavala	4 hr
May 29, 1:26 AM CDT	River Flood Warning	EWX	Kerr	22 hr
May 29, 1:37 AM CDT	River Flood Warning	EWX	Bandera	17 hr
May 29, 1:48 AM CDT	Areal Flood Advisory	EWX	Bastrop, Caldwell, Fayette, Gonzales, Guadalupe, Lee and 1 more	4 hr
May 29, 2:00 AM CDT	Special Weather Statement	EWX	Dimmit	45 min
May 29, 2:54 AM CDT	River Flood Warning	EWX	Val Verde	26 hr
May 29, 2:54 AM CDT	River Flood Warning	EWX	Val Verde	32 hr
May 29, 3:06 AM CDT	River Flood Warning	EWX	Caldwell, Gonzales	3 days
May 29, 4:40 AM CDT	River Flood Warning	EWX	Llano	21 hr
May 29, 8:01 AM CDT	River Flood Warning	EWX	Blanco	19 hr
May 29, 3:12 PM CDT	Flash Flood Watch	EWX	Atascosa, Bandera, Bastrop, Bexar, Blanco, Burnet and 27 more	34 hr

Nearby

Flash Flood Warnings in Texas, 2015 Every flash flood warning in 2015

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.