Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 246, NWS Austin/San Antonio, TX

October 24, 20025 counties in Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Oct 24, 2002, 4:09 AM CDT for 5 counties in 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 counties it named.

The facts

Issued: Oct 24, 2002, 4:09 AM CDT (09:09 UTC)
Expired: Oct 24, 2002, 8:00 AM CDT
In force: 4 hr
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

Counties Edwards County, TX, Kinney County, TX, Maverick County, TX, Real County, TX, Uvalde County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 9.2 hours before the alert went out and 70 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 240909
FFWSAT
TXC137-271-323-385-463-241300-

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

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
  EDWARDS
  REAL
  UVALDE
  KINNEY
  MAVERICK

* UNTIL 800 AM CDT

* AT 405 AM...WEATHER SERVICE DOPPLER RADAR INDICATED SHOWERS AND 
THUNDERSTORMS WITH VERY HEAVY RAIN FROM THE UPPER RIO GRANDE PLAINS 
OVER MAVERICK COUNTY NORTHWARD INTO THE WESTERN HILL 
COUNTRY...MOVING NORTHEAST AT 30 MPH.  FURTHER RAINS WERE MOVING 
NORTHWARD FROM MEXICO INTO MAVERICK COUNTY.  RAINS COULD CONTINUE 
WELL INTO THE MORNING. RAINFALL RATES COULD AVERAGE BETWEEN ONE AND 
TWO INCHES PER HOUR IN THE HEAVIER SHOWERS AND STORMS.

HURRICANE KENNA IN THE EASTERN PACIFIC WAS STARTING TO HAVE AN 
INFLUENCE ON STORMS MOVING INTO SOUTH CENTRAL TEXAS AS AN UPPER 
LEVEL MOISTURE PLUME WAS STREAMING NORTHEAST INTO THE AREA.  THIS 
MAY RESULT IN INCREASED HEAVY RAIN POTENTIAL LATER THIS MORNING FROM 
THESE SHOWERS AND STORMS. 
         
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.

3 follow-up statements

000 
WGUS74 KEWX 240951
FFSSAT
TXC137-271-323-385-463-241145-

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

...A FLASH FLOOD WARNING CONTINUES FOR EDWARDS...REAL...UVALDE...
KINNEY AND MAVERICK COUNTIES UNTIL 8 AM CDT...

AT 445 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SHOWERS 
AND THUNDERSTORMS PRODUCING VERY HEAVY RAINFALL FROM THE UPPER RIO 
GRANDE PLAINS NORTHWARD INTO THE HILL COUNTRY. SOME UPPER LEVEL 
TROPICAL MOISTURE FROM HURRICANE KENNA MAY BE ENHANCING RAIN TOTALS. 

RAINFALL RATES CONTINUE BETWEEN ONE AND TWO INCHES PER HOUR IN THE 
HEAVIER SHOWERS AND STORMS. 

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 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 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 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, 5:44 AM CDT	Flash Flood Warning	EWX	Zavala	2 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.