Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 247, NWS Austin/San Antonio, TX

October 24, 2002Zavala County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Oct 24, 2002, 5:44 AM CDT for Zavala County, Texas. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Oct 24, 2002, 5:44 AM CDT (10:44 UTC)
Expired: Oct 24, 2002, 8:00 AM CDT
In force: 2 hr
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County Zavala County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 10.7 hours before the alert went out and 119 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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 241044
FFWSAT
TXC507-241245-

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

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 745 AM CDT

* AT 540 AM...WEATHER SERVICE DOPPLER RADAR INDICATED SHOWERS AND 
THUNDERSTORMS WITH VERY HEAVY RAIN INDICATED OVER NORTHERN ZAVALA 
COUNTY MOVING NORTHEAST AT 25 MPH.  OTHER DEVELOPING SHOWERS WERE
IN SOUTHERN MAVERICK COUNTY MOVING NORTHEAST.  RAINFALL RATES OF 
NEAR 2 INCHES AN HOUR WERE OCCURRING IN THE HEAVIER STORMS.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND
ARROYOS...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. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

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.

Issued	Product	Office	Counties	Lasted
Oct 24, 4:09 AM CDT	Flash Flood Warning	EWX	Edwards, Kinney, Maverick, Real, Uvalde	4 hr
Oct 24, 5:52 AM CDT	Flash Flood Warning	EWX	Bexar, Medina	4 hr
Oct 24, 7:44 AM CDT	Flash Flood Warning	EWX	Edwards, Kinney, Maverick, Real, Uvalde, Val Verde	4 hr
Oct 24, 9:23 AM CDT	Flash Flood Warning	EWX	Atascosa, Bandera, Bexar, Comal, Frio, Kendall and 2 more	3 hr
Oct 24, 9:53 AM CDT	Flash Flood Warning	EWX	Dimmit, Zavala	112 min
Oct 24, 11:00 AM CDT	Flash Flood Warning	EWX	Caldwell, Gonzales, Guadalupe, Karnes, Wilson	3 hr
Oct 24, 11:28 AM CDT	Flash Flood Warning	EWX	Dimmit, Real, Uvalde, Zavala	62 min
Oct 24, 12:09 PM CDT	Flash Flood Warning	EWX	Atascosa, Bandera, Bexar, Blanco, Comal, Frio and 5 more	111 min
Oct 24, 12:36 PM CDT	Flash Flood Warning	EWX	DeWitt, Lavaca	84 min
Oct 24, 1:10 PM CDT	Flash Flood Warning	EWX	Bastrop, Fayette, Travis	3 hr
Oct 24, 1:52 PM CDT	Flash Flood Warning	EWX	Bexar, Comal, Guadalupe	2 hr
Oct 24, 2:00 PM CDT	Flash Flood Warning	EWX	DeWitt, Gonzales, Karnes, Lavaca, Wilson	2 hr

Nearby

Flash Flood Warnings in Texas, 2002 Every 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.