Alert archive / Texas / Flash Flood Warnings in 2005

Flash Flood Warning 101, NWS Austin/San Antonio, TX

September 11, 2005Medina County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Sep 11, 2005, 1:10 PM CDT for Medina 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 11, 2005, 1:10 PM CDT (18:10 UTC)
Expired
Sep 11, 2005, 4:15 PM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Medina County, TX

The radar

The Laughlin AFB radar (KDFX), 107 km from the middle of the area, began a volume at 18:12 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 12:00Z, 6.2 hours before the alert went out and 162 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 2005-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1214 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 2005-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 17 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
1214 J/kg
Mixed-layer CIN
-13 J/kg
Mixed-layer LCL
609 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
17 m²/s²
0-3 km storm-relative helicity
53 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.

000 
WGUS54 KEWX 111812
FFWEWX
TXC325-112115-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
110 PM CDT SUN SEP 11 2005

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 415 PM CDT

* AT 106 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
VERY HEAVY RAIN FROM NUMEROUS THUNDERSTORMS OVER THE WARNED AREA.

SHOWERS AND THUNDERSTORMS WILL CONTINUE TO MOVE NORTH AT 10 TO 15 
MPH OVER SOUTH CENTRAL TEXAS.  THE STORMS OVER MEDINA COUNTY HAVE 
THE POTENTIAL TO PRODUCE 2 TO 3 INCHES OF RAIN OVER THE NEXT FEW 
HOURS.  

DUE TO ALREADY SATURATED SOILS FROM RAINFALL THIS MORNING...THESE 
STORMS WILL CREATE RUNOFF WHICH WILL CAUSE FLOODING OF SMALL CREEKS 
AND STREAMS...COUNTRY ROADS...AND FARMLAND ALONG THE BANKS OF CREEKS 
AND STREAMS.

LAT...LON 2911 9938 2911 9887 2957 9885 2956 9940

$$
1 follow-up statement
000 
WGUS74 KEWX 111911
FFSEWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
207 PM CDT SUN SEP 11 2005

TXC325-112115-
MEDINA TX-
207 PM CDT SUN SEP 11 2005

...A FLASH FLOOD WARNING CONTINUES UNTIL 415 PM CDT FOR MEDINA
COUNTY...

AT 206 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS OVER MEDINA COUNTY.  THE STRONGEST OF THESE 
STORMS WAS LOCATED NORTH OF HONDO ABOUT 5 MILES WEST OF HIGHWAY 
173.  RUNOFF FROM THESE STORMS COULD CAUSE MINOR FLOODING OF LOW 
LYING AREAS AS WELL AS HIGHWAYS.

ALTHOUGH NO FLOODING HAS BEEN REPORTED YET...RADAR ESTIMATES SHOW 
THAT 1.5 TO 2 INCHES OF RAIN HAS FALLEN OVER CENTRAL MEDINA COUNTY. 

LOCATIONS IN THE WARNING INCLUDE RIO MEDINA...MICO...HONDO AND
CASTROVILLE.

LAT...LON 2911 9938 2911 9887 2957 9885 2956 9940

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 10, 9:48 PM CDTFlash Flood WarningEWXFrio, Medina3 hr
Sep 11, 6:54 AM CDTFlash Flood WarningEWXMedina3 hr
Sep 11, 11:18 AM CDTFlash Flood WarningEWXCaldwell, Hays, Travis3 hr
Sep 11, 1:17 PM CDTFlash Flood WarningEWXAtascosa, Bexar3 hr

Nearby

Flash Flood Warnings in Texas, 2005Every flash flood warning in 2005

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.