Alert archive / Texas / Flash Flood Warnings in 2003

Flash Flood Warning 10, NWS Austin/San Antonio, TX

February 21, 20034 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Feb 21, 2003, 3:47 AM CST for 4 counties in 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
Feb 21, 2003, 3:47 AM CST (09:47 UTC)
Expired
Feb 21, 2003, 6:45 AM CST
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

Counties Bandera County, TX, Gillespie County, TX, Kendall County, TX, Kerr County, TX

The radar

The Austin/San Antonio radar (KEWX), 118 km from the middle of the area, began a volume at 09:49 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.

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 9.8 hours before the alert went out and 177 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 2003-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2003-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 0 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
567 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
0 m²/s²
0-3 km storm-relative helicity
154 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 210950
FFWSAT
TXC019-171-259-265-211245-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
347 AM CST FRI FEB 21 2003

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
  GILLESPIE
  KERR
  KENDALL
  BANDERA

* UNTIL 645 AM CST

* AT 347 AM...WEATHER SERVICE DOPPLER RADAR INDICATED AREAS OF 
HEAVY RAIN CONTINUING TO FORM AND INCREASE OVER PARTS OF 
GILLESPIE...KERR...KENDALL...AND BANDERA COUNTIES.  

LCALLY HEAVY RAIN IS EXPECTED IN THE NEXT FEW HOURS...AND 
WILL CAUSE FLOODING AT LOW WATER CROSSINGS OR IN LOW LYING AREAS.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL 
CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY
ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER 
LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.

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. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR OTHER LOW SPOTS IF WATER COVERS
THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

LAT...LON 2971 9954 2970 9899 2996 9869 3048 9863
          3045 9923 3026 9920 3017 9963

$$
1 follow-up statement
000 
WGUS74 KEWX 211245
FFSSAT
TXC019-259-265-211300-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
645 AM CST FRI FEB 21 2003

...THE FLASH FLOOD WARNING FOR KERR...KENDALL AND BANDERA COUNTIES
HAS EXPIRED...

NATIONAL WEATHER SERVICE RADAR INDICATED THE HEAVY RAINFALL WAS 
ENDING AND THE FLOOD THREAT WAS DIMINISHING. SOME MINOR FLOODING MAY 
CONTINUE...BUT THE THREAT OF SERIOUS FLOODING HAS ENDED AND THE 
FLASH FLOOD WARNING HAS EXPIRED.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD.
VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO
HIGHER GROUND. STAY TUNED TO LOCAL MEDIA OUTLETS FOR THE LATEST
WEATHER INFORMATION.

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Feb 20, 8:06 PM CSTFlash Flood WarningEWXBurnet3 hr
Feb 20, 8:31 PM CSTFlash Flood WarningEWXFayette89 min
Feb 21, 3:51 AM CSTSevere Thunderstorm WarningEWXBandera, Kerr54 min
Feb 21, 4:39 AM CSTFlash Flood WarningEWXBlanco, Burnet3 hr
Feb 21, 4:47 AM CSTSevere Thunderstorm WarningEWXKendall, Kerr58 min
Feb 21, 6:01 AM CSTFlash Flood WarningEWXHays, Travis, Williamson4 hr
Feb 21, 6:38 AM CSTFlash Flood WarningEWXGillespie67 min

Nearby

Flash Flood Warnings in Texas, 2003Every flash flood warning in 2003

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.