Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 248, NWS Austin/San Antonio, TX

October 24, 2002Bexar County, Medina County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Oct 24, 2002, 5:52 AM CDT for Bexar County, Medina 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
Oct 24, 2002, 5:52 AM CDT (10:52 UTC)
Expired
Oct 24, 2002, 9:45 AM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

Counties Bexar County, TX, Medina County, TX

The radar

The Austin/San Antonio radar (KEWX), 83 km from the middle of the area, began a volume at 10:53 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, 10.9 hours before the alert went out and 194 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 2002-10-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 601 joules per kilogram.LCLEL10008507005003002001001 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 2002-10-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 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
601 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
769 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
100 m²/s²
Significant tornado parameter
0.2
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 241052
FFWSAT
TXC029-325-241445-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
549 AM CDT THU OCT 24 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 945 AM CDT

* AT 549 AM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN
  ASSOCIATED WITH NUMEROUS SHOWERS AND THUNDERSTORMS MOVING EAST AT  
  25 MPH.

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.

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 2945 9913 2931 9899 2938 9849 2971 9848
2 follow-up statements
000 
WGUS74 KEWX 241202
FFSSAT
TXC029-137-271-323-325-385-463-507-241345-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
646 AM CDT THU OCT 24 2002

...FLASH FLOOD WARNINGS CONTINUE FOR EDWARDS...REAL...MAVERICK
...UVALDE AND KINNEY COUNTIES TIL 8 AM...
...FLASH FLOOD WARNINGS ARE IN EFFECT FOR BEXAR AND MEDINA COUNTIES 
TIL 945 AM...
...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR ZAVALA COUNTY TIL 
745 AM CDT...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SHOWERS AND 
THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL FROM MEXICO EXTENDING 
EASTWARD ACROSS THE UPPER RIO GRANDE PLAINS INTO SOUTH CENTRAL 
TEXAS. RAINFALL RATES IN THE HEAVIER SHOWERS AND STORMS WERE IN YHE 
ONE TO TWO INCH RANGE. 

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.
000 
WGUS74 KEWX 241204
FFSSAT
TXC029-137-271-323-325-385-463-507-241345-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
702 AM CDT THU OCT 24 2002

...FLASH FLOOD WARNINGS CONTINUE FOR EDWARDS...REAL...MAVERICK
...UVALDE AND KINNEY COUNTIES TIL 8 AM...
...FLASH FLOOD WARNINGS ARE IN EFFECT FOR BEXAR AND MEDINA COUNTIES 
TIL 945 AM...
...A FLASH FLOOD WARNING REMAINS IN EFFECT FOR ZAVALA COUNTY TIL 
745 AM CDT...

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SHOWERS AND 
THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL FROM MEXICO EXTENDING 
EASTWARD ACROSS THE UPPER RIO GRANDE PLAINS INTO SOUTH CENTRAL 
TEXAS. RAINFALL RATES IN THE HEAVIER SHOWERS AND STORMS WERE IN THE 
ONE TO TWO INCH RANGE. 

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
Oct 24, 4:09 AM CDTFlash Flood WarningEWXEdwards, Kinney, Maverick, Real, Uvalde4 hr
Oct 24, 5:44 AM CDTFlash Flood WarningEWXZavala2 hr
Oct 24, 7:44 AM CDTFlash Flood WarningEWXEdwards, Kinney, Maverick, Real, Uvalde, Val Verde4 hr
Oct 24, 9:23 AM CDTFlash Flood WarningEWXAtascosa, Bandera, Bexar, Comal, Frio, Kendall and 2 more3 hr
Oct 24, 9:53 AM CDTFlash Flood WarningEWXDimmit, Zavala112 min
Oct 24, 11:00 AM CDTFlash Flood WarningEWXCaldwell, Gonzales, Guadalupe, Karnes, Wilson3 hr
Oct 24, 11:28 AM CDTFlash Flood WarningEWXDimmit, Real, Uvalde, Zavala62 min
Oct 24, 12:09 PM CDTFlash Flood WarningEWXAtascosa, Bandera, Bexar, Blanco, Comal, Frio and 5 more111 min
Oct 24, 12:36 PM CDTFlash Flood WarningEWXDeWitt, Lavaca84 min
Oct 24, 1:10 PM CDTFlash Flood WarningEWXBastrop, Fayette, Travis3 hr
Oct 24, 1:52 PM CDTFlash Flood WarningEWXBexar, Comal, Guadalupe2 hr
Oct 24, 2:00 PM CDTFlash Flood WarningEWXDeWitt, Gonzales, Karnes, Lavaca, Wilson2 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.