Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 49, NWS Austin/San Antonio, TX

July 1, 2002Bexar County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 1, 2002, 7:54 PM CDT for Bexar County, 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
Jul 1, 2002, 7:54 PM CDT (00:54 UTC)
Expired
Jul 2, 2002, 12:00 AM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

County Bexar County, TX

The radar

The Austin/San Antonio radar (KEWX), 51 km from the middle of the area, began a volume at 00:58 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, 0.9 hours before the alert went out and 224 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 2002-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1267 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 2002-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 14 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
1267 J/kg
Mixed-layer CIN
-42 J/kg
Mixed-layer LCL
1097 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
14 m²/s²
0-3 km storm-relative helicity
101 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 020054
FFWSAT
TXC029-020500-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
755 PM CDT MON JUL 1 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL MIDNIGHT CDT

* AT 754 PM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN
  OVER MUCH OF NORTHERN SAN ANTONIO...MOVING NORTHEAST AT 5 MPH.  
  RAINFALL RATES OF 3 TO 4.5 INCHES PER HOUR. 

* THIS WARNING INCLUDES LOCATIONS IN AND AROUND...
  ALAMO HEIGHTS
  HILL COUNTRY VILLAGE
  HOLLYWOOD PARK
  WINDCREST
  CONVERSE
  SHAVANO PARK
  BALCONES HEIGHTS
  CASTLE HILLS
  OLMOS PARK

THIS IS A DANGEROUS SITUATION.  

FLOOD WATERS ARE MOVING DOWN OLMOS CREEK...LEON CREEK...SALADO 
CREEK...APACHE CREEK...ZARZOMORA CREEK AND THE SAN ANTONIO RIVER.  
THEY WILL BE IN FLOOD CONDITIONS AT LEAST THROUGH MIDNIGHT. 

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. 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.

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.

LAT...LON 2942 9879 2932 9840 2951 9821 2967 9840
          2973 9840 2972 9844 2975 9860 2971 9880
1 follow-up statement
000 
WGUS74 KEWX 020222
FFSSAT
TXC029-020300-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
923 PM CDT MON JUL 1 2002

...A FLASH FLOOD WARNING CONTINUES FOR BEXAR COUNTY UNTIL MIDNIGHT 
CDT...

AT 920 PM CDT...VERY HEAVY RAINFALL CONTINUES ACROSS FAR NORTHERN 
BEXAR COUNTY.  THE HEAVIEST RAINFALL WITH RATES OF 2 TO 3.5 INCHES 
PER HOUR WAS BETWEEN THE DOMINION AND STONE OAK.  ELSEWHERE ACROSS 
NORTHERN BEXAR COUNTY...RAINFALL RATES WERE BETWEEN ONE HALF AND ONE 
INCH PER HOUR.  

THE HEAVIEST RAINS WERE DRIFTING TO THE NORTHEAST AT 5 MPH AND WERE 
DECREASING.  HOWEVER...SHOWERS AND THUNDERSTORMS WERE BEGINNING TO 
REDEVLOP ACROSS THE REMAINDER OF BEXAR COUNTY.   

THIS IS A VERY DANGEROUS SITUATION.  THERE IS WIDESPREAD FLOODING 
ACROSS MUCH OF NORTHERN AND CENTRAL BEXAR COUNTY.  

A FLOOD WARNING HAS BEEN ISSSUED FOR LEON CREEK...SALADO 
CREEK...OLMOS CREEK...AND APACHE CREEK.  MAJOR FLOODING IS EXPECTED 
ON THESE CREEKS. 

TRAVEL IS NOT RECOMMENDED.  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
Jul 1, 7:10 PM CDTFlash Flood WarningEWXComal3 hr
Jul 1, 8:58 PM CDTFlash Flood WarningEWXHays3 hr
Jul 1, 9:39 PM CDTFlash Flood WarningEWXComal2 hr
Jul 1, 9:58 PM CDTFlash Flood WarningEWXTravis2 hr
Jul 1, 11:40 PM CDTFlash Flood WarningEWXBexar, Comal, Hays, Kendall, Travis4 hr
Jul 2, 1:18 AM CDTFlash Flood WarningEWXBandera, Medina, Uvalde117 min
Jul 2, 2:29 AM CDTFlash Flood WarningEWXGillespie, Kerr, Real6 hr
Jul 2, 2:51 AM CDTFlash Flood WarningEWXBandera, Medina, Uvalde6 hr
Jul 2, 3:04 AM CDTFlash Flood WarningEWXBexar, Blanco, Burnet, Comal, Kendall5 hr
Jul 2, 3:47 AM CDTFlash Flood WarningEWXWilson5 hr
Jul 2, 4:29 AM CDTFlash Flood WarningEWXDeWitt, Gonzales, Guadalupe, Karnes4 hr
Jul 2, 4:37 AM CDTFlash Flood WarningEWXKinney4 hr
Jul 2, 6:01 AM CDTFlash Flood WarningEWXCaldwell, Hays6 hr
Jul 2, 6:04 AM CDTFlash Flood WarningEWXLavaca6 hr
Jul 2, 6:44 AM CDTFlash Flood WarningEWXBandera, Blanco, Burnet, Gillespie, Kendall, Kerr and 4 more5 hr
Jul 2, 6:50 AM CDTFlash Flood WarningEWXBexar, Comal, DeWitt, Gonzales, Guadalupe, Karnes and 1 more5 hr
Jul 2, 7:23 AM CDTFlash Flood WarningEWXBastrop, Fayette, Travis5 hr
Jul 2, 11:41 AM CDTFlash Flood WarningEWXEdwards, Kinney, Uvalde4 hr
Jul 2, 11:50 AM CDTFlash Flood WarningEWXBastrop, Caldwell, DeWitt, Fayette, Gonzales, Hays and 4 more4 hr
Jul 2, 12:00 PM CDTFlash Flood WarningEWXBandera, Bexar, Blanco, Burnet, Comal, Gillespie and 7 more4 hr
Jul 2, 3:34 PM CDTFlash Flood WarningEWXBlanco, Burnet, Llano4 hr
Jul 2, 3:44 PM CDTFlash Flood WarningEWXBastrop, Fayette, Lavaca, Lee4 hr
Jul 2, 3:52 PM CDTFlash Flood WarningEWXBandera, Bexar, Caldwell, Comal, DeWitt, Gillespie and 12 more4 hr

Nearby

Flash Flood Warnings in Texas, 2002Every flash flood warning in 2002

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.