Alert archive / Texas / Flash Flood Warnings in 2014

Flash Flood Warning 47, NWS Austin/San Antonio, TX

September 7, 2014Gillespie County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Sep 7, 2014, 5:46 AM CDT for Gillespie 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
Sep 7, 2014, 5:46 AM CDT (10:46 UTC)
Expired
Sep 7, 2014, 8:45 AM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Storm-based polygon
Flood severity
None

County Gillespie County, TX

The radar

The Austin/San Antonio radar (KEWX), 117 km from the middle of the area, began a volume at 10:46 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 00:00Z, 10.8 hours before the alert went out and 209 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 2014-09-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 272 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 00:00Z on 2014-09-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 square meters per square second.1939Sfc1 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
272 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
2016 m above ground
0-6 km bulk shear
5 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
1 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

844 
WGUS54 KEWX 071046
FFWEWX
TXC171-071345-
/O.NEW.KEWX.FF.W.0047.140907T1046Z-140907T1345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
546 AM CDT SUN SEP 7 2014

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL GILLESPIE COUNTY IN SOUTH CENTRAL TEXAS...
  THIS INCLUDES THE CITY OF FREDERICKSBURG...

* UNTIL 845 AM CDT

* AT 536 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
  DETERMINED THAT RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE
  RAINFALL AMOUNTS OF 2 TO 3 INCHES HAVE FALLEN ACROSS CENTRAL AND
  SOUTHERN PORTIONS OF GILLESPIE COUNTY. AN ADDITIONAL 1 TO 2 INCHES
  OF RAIN IS POSSIBLE BY 8 AM CDT. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  FREDERICKSBURG...BLUMENTHAL...CAIN CITY...ROCKY HILL...TIVYDALE...
  HILLTOP...CHERRY SPRING...DOSS...LUCKENBACH AND U.S. HIGHWAYS 
  290 AND 87. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

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

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

&&

LAT...LON 3049 9917 3049 9893 3037 9881 3014 9869
      3014 9917

$$
1 follow-up statement
066 
WGUS74 KEWX 071205
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
705 AM CDT SUN SEP 7 2014

TXC171-071345-
/O.CON.KEWX.FF.W.0047.000000T0000Z-140907T1345Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GILLESPIE TX-
705 AM CDT SUN SEP 7 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 845 AM CDT FOR
CENTRAL GILLESPIE COUNTY...

AT 657 AM CDT...NWS METEOROLOGISTS CONTINUED TO DETECT HEAVY SHOWERS 
AND THUNDERSTORMS PRODUCING RAINFALL RATES UP TO 1.5 INCHES PER 
HOUR. THIS ACTIVITY ALONG WITH PREVIOUS HEAVY RAINFALL WILL CONTINUE 
TO POSE A FLASH FLOOD THREAT OVER THE WARNED AREA. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
FREDERICKSBURG...BLUMENTHAL...CAIN CITY...ROCKY HILL...TIVYDALE...
HILLTOP...CHERRY SPRING...DOSS...LUCKENBACH AND U.S. HIGHWAYS 290 
AND 87.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

ADDITIONAL RAINFALL AMOUNTS OF UP TO 1.5 INCHES ARE POSSIBLE IN
THE WARNED AREA.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE
BANKS OF CREEKS AND STREAMS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. MOVE TO HIGHER GROUND.

&&

LAT...LON 3049 9917 3049 9893 3037 9881 3014 9869
      3014 9917

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 6, 8:06 PM CDTSpecial Weather StatementEWXWilliamson39 min
Sep 7, 1:11 AM CDTAreal Flood AdvisoryEWXBastrop, Travis, Williamson109 min
Sep 7, 1:33 AM CDTAreal Flood AdvisoryEWXLee117 min
Sep 7, 1:46 AM CDTSpecial Weather StatementEWXLee59 min
Sep 7, 2:43 AM CDTAreal Flood AdvisoryEWXBastrop107 min
Sep 7, 3:32 AM CDTAreal Flood AdvisoryEWXFayette, Lee118 min
Sep 7, 3:53 AM CDTAreal Flood AdvisoryEWXBandera, Kendall, Kerr, Medina2 hr
Sep 7, 5:03 AM CDTFlash Flood WarningEWXBandera, Medina, Uvalde117 min
Sep 7, 5:07 AM CDTSpecial Weather StatementEWXBandera53 min
Sep 7, 5:28 AM CDTAreal Flood AdvisoryEWXGillespie2 hr
Sep 7, 5:42 AM CDTAreal Flood AdvisoryEWXEdwards, Real, Uvalde108 min
Sep 7, 6:08 AM CDTFlash Flood WarningEWXEdwards, Real, Uvalde2 hr

Nearby

Flash Flood Warnings in Texas, 2014Every flash flood warning in 2014

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.