Alert archive / Texas / Flash Flood Warnings in 2017

Flash Flood Warning 18, NWS Austin/San Antonio, TX

May 28, 20174 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 28, 2017, 5:42 PM CDT for 4 counties in Texas. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
May 28, 2017, 5:42 PM CDT (22:42 UTC)
Expired
May 28, 2017, 9:15 PM 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, Gillespie County, TX, Kerr County, TX

The radar

The Austin/San Antonio radar (KEWX), 88 km from the middle of the area, began a volume at 22:43 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.

The nearest sounding before it

Del Rio, TX (KDLF), launched 12:00Z, 10.7 hours before the alert went out and 240 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-pSkew-T log-p diagram, Del Rio, TX at 12:00Z on 2017-05-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3017 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 12:00Z on 2017-05-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 83 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
3017 J/kg
Mixed-layer CIN
-339 J/kg
Mixed-layer LCL
1097 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
83 m²/s²
0-3 km storm-relative helicity
100 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.0

Open this sounding in Storm Lab

The text

As transmitted.

209 
WGUS54 KEWX 282242
FFWEWX
TXC031-053-171-265-290215-
/O.NEW.KEWX.FF.W.0018.170528T2242Z-170529T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
542 PM CDT SUN MAY 28 2017

The National Weather Service in Austin San Antonio has issued a

* Flash Flood Warning for...
  East central Kerr County in south central Texas...
  Northern Blanco County in south central Texas...
  Southeastern Gillespie County in south central Texas...
  South central Burnet County in south central Texas...

* Until 915 PM CDT

* At 541 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain from Hunt to near Fredericksburg to Round Mountain. Up 
  to three inches of rain have already fallen. Flash flooding is 
  expected to begin shortly.

* Some locations that will experience flooding include...
  Kerrville, Fredericksburg, Marble Falls, Round Mountain, Hunt,
  Horseshoe Bay, Ingram, Meadowlakes, Johnson City, Stonewall,
  Spicewood, Blowout, Tivydale, Rocky Hill, Waltonia, Rocky Creek,
  Hye, Cypress Mill, Blumenthal and Kerrville State Park.

Additional rainfall amounts of 1 to 4 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

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.

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

&&

LAT...LON 3043 9813 3029 9822 3014 9859 3014 9892
      3006 9897 2997 9937 3013 9938 3042 9876
      3050 9839 3049 9835 3051 9835 3062 9824

$$

CP
2 follow-up statements
148 
WGUS74 KEWX 290023
FFSEWX

Flash Flood Statement
National Weather Service Austin/San Antonio TX
723 PM CDT SUN MAY 28 2017

TXC031-053-171-265-290215-
/O.CON.KEWX.FF.W.0018.000000T0000Z-170529T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kerr TX-Blanco TX-Gillespie TX-Burnet TX-
723 PM CDT SUN MAY 28 2017

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR
EAST CENTRAL KERR...NORTHERN BLANCO...SOUTHEASTERN GILLESPIE AND
SOUTH CENTRAL BURNET COUNTIES...

At 721 PM CDT, Doppler radar indicated thunderstorms producing heavy 
rain in the Fredericksburg to Stonewall areas with light rain 
elsewhere. Up to four inches of rain have already fallen. Flash 
flooding will continue across the warned area. 

Some locations that will experience flooding include...
Kerrville, Fredericksburg, Marble Falls, Round Mountain, Hunt,
Horseshoe Bay, Ingram, Meadowlakes, Johnson City, Stonewall,
Spicewood, Blowout, Tivydale, Rocky Hill, Waltonia, Rocky Creek, Hye,
Cypress Mill, Blumenthal and Kerrville State Park.

Additional rainfall amounts of up to 1 inch are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Excessive runoff from heavy rainfall will cause flooding of small
creeks and streams, country roads, farmland, and other low lying
spots.

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.

Flooding is occurring or is imminent. It is important to know where
you are relative to streams, rivers, or creeks which can become
killers in heavy rains. Campers and hikers should avoid streams or
creeks.

&&

LAT...LON 3043 9813 3029 9822 3014 9859 3014 9892
      3006 9897 2997 9937 3013 9938 3042 9876
      3050 9839 3049 9835 3051 9835 3062 9824

$$

CP
457 
WGUS74 KEWX 290210
FFSEWX

Flash Flood Statement
National Weather Service Austin/San Antonio TX
910 PM CDT SUN MAY 28 2017

TXC031-053-171-265-290220-
/O.EXP.KEWX.FF.W.0018.000000T0000Z-170529T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Kerr TX-Blanco TX-Gillespie TX-Burnet TX-
910 PM CDT SUN MAY 28 2017

...THE FLASH FLOOD WARNING FOR EAST CENTRAL KERR...NORTHERN BLANCO...
SOUTHEASTERN GILLESPIE AND SOUTH CENTRAL BURNET COUNTIES WILL EXPIRE
AT 915 PM CDT...

The heavy rain has ended. Flash flooding is no longer expected to 
pose a threat. Please continue to heed any remaining road closures.

LAT...LON 3043 9813 3029 9822 3014 9859 3014 9892
      3006 9897 2997 9937 3013 9938 3042 9876
      3050 9839 3049 9835 3051 9835 3062 9824

$$

CP

The office that day

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

IssuedProductOfficeCountiesLasted
May 28, 12:05 AM CDTSpecial Weather StatementEWXBurnet40 min
May 28, 2:43 PM CDTSpecial Weather StatementEWXReal47 min
May 28, 2:53 PM CDTSevere Thunderstorm WarningEWXEdwards, Real82 min
May 28, 3:13 PM CDTSevere Thunderstorm WarningEWXEdwards, Kinney, Val Verde77 min
May 28, 3:25 PM CDTFlash Flood WarningEWXEdwards, Kinney, Real, Val Verde4 hr
May 28, 3:57 PM CDTSevere Thunderstorm WarningEWXKerr78 min
May 28, 4:12 PM CDTSpecial Weather StatementEWXGillespie48 min
May 28, 4:12 PM CDTSevere Thunderstorm WarningEWXEdwards, Real78 min
May 28, 4:31 PM CDTSevere Thunderstorm WarningEWXEdwards, Kinney, Val Verde74 min
May 28, 4:48 PM CDTSpecial Weather StatementEWXBurnet42 min
May 28, 4:51 PM CDTAreal Flood AdvisoryEWXKerr, Real3 hr
May 28, 4:54 PM CDTSevere Thunderstorm WarningEWXBlanco, Burnet, Gillespie47 min
May 28, 4:57 PM CDTSevere Thunderstorm WarningEWXBurnet, Williamson46 min
May 28, 5:05 PM CDTAreal Flood AdvisoryEWXBlanco, Burnet, Gillespie3 hr
May 28, 5:19 PM CDTAreal Flood AdvisoryEWXBurnet, Williamson3 hr
May 28, 5:29 PM CDTSevere Thunderstorm WarningEWXBandera, Real31 min
May 28, 5:33 PM CDTFlash Flood WarningEWXEdwards, Kerr, Real, Uvalde3 hr
May 28, 5:40 PM CDTSevere Thunderstorm WarningEWXEdwards, Val Verde80 min
May 28, 5:41 PM CDTSevere Thunderstorm WarningEWXKinney, Val Verde79 min
May 28, 5:56 PM CDTAreal Flood AdvisoryEWXKinney, Val Verde3 hr
May 28, 5:59 PM CDTAreal Flood AdvisoryEWXEdwards, Val Verde3 hr
May 28, 6:09 PM CDTSpecial Weather StatementEWXKerr51 min
May 28, 6:12 PM CDTSevere Thunderstorm WarningEWXTravis, Williamson48 min
May 28, 6:28 PM CDTSevere Thunderstorm WarningEWXBandera, Kendall, Kerr62 min
May 28, 6:36 PM CDTSevere Thunderstorm WarningEWXFrio, Medina, Uvalde, Zavala69 min
May 28, 6:44 PM CDTFlash Flood WarningEWXEdwards, Kinney, Val Verde4 hr
May 28, 6:58 PM CDTSpecial Weather StatementEWXDimmit47 min

Nearby

Flash Flood Warnings in Texas, 2017Every flash flood warning in 2017

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.