Alert archive / Texas / Flash Flood Warnings in 2006

Flash Flood Warning 39, NWS Austin/San Antonio, TX

May 8, 2006Blanco County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at May 8, 2006, 1:23 AM CDT for Blanco County, Texas. It was in force for 3 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 8, 2006, 1:23 AM CDT (06:23 UTC)
Expired
May 8, 2006, 4:30 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Blanco County, TX

The radar

The Austin/San Antonio radar (KEWX), 74 km from the middle of the area, began a volume at 06:23 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 (KDRT), launched 00:00Z, 6.4 hours before the alert went out and 262 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 00:00Z on 2006-05-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2122 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 2006-05-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 22 square meters per square second.1939587897Sfc1 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
2122 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
1339 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
22 m²/s²
0-3 km storm-relative helicity
123 m²/s²
Significant tornado parameter
0.7
Supercell composite
4.8

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 080624
FFWEWX
TXC031-080930-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
123 AM CDT MON MAY 8 2006

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
  BLANCO

* UNTIL 430 AM CDT

* AT 119 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM THUNDERSTORMS OVER THE WARNED AREA. A LINE
  OF THUNDERSTORMS EXTENDED FROM STONEWALL TO CYPRESS MILL. THIS
  LINE WILL SLOWLY MOVE SOUTHEAST AT 5 TO 10 MPH. RAINFALL RATES
  OF 1 TO 2 INCHES PER HOUR CAN BE EXPECTED. 

* LOCATIONS IN THE WARNING INCLUDE PEDERNALES FALLS STATE PARK AND
  JOHNSON CITY.

WHEN WATER COVERS THE ROAD...TURN AROUND DONT DROWN. THE LIFE YOU
SAVE MAY BE YOUR OWN.

IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD
WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS.

LAT...LON 3044 9814 3046 9857 3014 9859 3008 9831

$$
2 follow-up statements
000 
WGUS74 KEWX 080725
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
224 AM CDT MON MAY 8 2006

TXC031-080930-
BLANCO TX-
224 AM CDT MON MAY 8 2006

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 AM CDT FOR
BLANCO COUNTY...

AT 223 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING VERY HEAVY RAIN FROM SOUTH OF 
JOHNSON CITY TO TWIN SISTERS. RAINFALL RATES AROUND ONE INCH PER 
HOUR CAN BE EXPECTED. 

WHEN WATER COVERS THE ROAD...TURN AROUND DONT DROWN. THE LIFE YOU 
SAVE MAY BE YOUR OWN.

IT IS HARD TO RECOGNIZE THE DANGERS OF FLOODING AT NIGHT. IF FLOOD
WATERS RISE ACT QUICKLY. DO NOT STAY IN FLOOD PRONE AREAS.

LAT...LON 3044 9814 3046 9857 3014 9859 3008 9831

$$
000 
WGUS74 KEWX 080800
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
258 AM CDT MON MAY 8 2006

TXC031-080808-
BLANCO TX-
258 AM CDT MON MAY 8 2006

...THE FLASH FLOOD WARNING FOR BLANCO COUNTY IS CANCELLED...

RAINS HAVE ENDED ACROSS BLANCO COUNTY. AS A RESULT...THE FLASH FLOOD 
WARNING IS CANCELLED.

SOME PONDING OF WATER IN LOW LYING AREAS AND SLIGHT RISES BELOW 
BANKFULL IN SMALL STREAMS ARE POSSIBLE FOR THE NEXT HOUR OR SO. 

LAT...LON 3044 9814 3046 9857 3014 9859 3008 9831

$$

The office that day

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

IssuedProductOfficeCountiesLasted
May 7, 8:50 PM CDTSevere Thunderstorm WarningEWXVal Verde85 min
May 7, 11:46 PM CDTSevere Thunderstorm WarningEWXGillespie, Llano59 min
May 8, 12:19 AM CDTSevere Thunderstorm WarningEWXBurnet56 min
May 8, 12:38 AM CDTSevere Thunderstorm WarningEWXKerr67 min
May 8, 12:45 AM CDTSevere Thunderstorm WarningEWXWilliamson60 min
May 8, 12:54 AM CDTFlash Flood WarningEWXTravis, Williamson3 hr
May 8, 1:02 AM CDTSevere Thunderstorm WarningEWXTravis58 min
May 8, 1:11 AM CDTFlash Flood WarningEWXGillespie, Kerr3 hr
May 8, 1:42 AM CDTSevere Thunderstorm WarningEWXLee63 min
May 8, 1:44 AM CDTSevere Thunderstorm WarningEWXWilliamson24 min
May 8, 1:48 AM CDTSevere Thunderstorm WarningEWXKendall57 min
May 8, 2:42 AM CDTSevere Thunderstorm WarningEWXComal20 min
May 8, 5:56 PM CDTSevere Thunderstorm WarningEWXMaverick60 min

Nearby

Flash Flood Warnings in Texas, 2006Every flash flood warning in 2006

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.