Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 268, NWS Austin/San Antonio, TX

July 1, 2002Atascosa County, Bexar County, Frio County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 1, 2002, 12:12 PM CDT for Atascosa County, Bexar County, Frio County, 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: Jul 1, 2002, 12:12 PM CDT (17:12 UTC)
Expired: Jul 1, 2002, 3:00 PM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Counties, with a storm outline in the text

Counties Atascosa County, TX, Bexar County, TX, Frio County, TX

The radar

The Austin/San Antonio radar (KEWX), 89 km from the middle of the area, began a volume at 17:15 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

Corpus Christi, TX (KCRP), launched 12:00Z, 5.2 hours before the alert went out and 205 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: 1883 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 757 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 138 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 011712 CCA
FFWSAT
TXC013-029-163-012000-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1144 AM CDT MON JUL 1 2002...CORRECTED FOR VALID TIME

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 300 PM CDT

* AT 1144 AM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
  RAIN NEAR PEARSALL AND BETWEEN SOMERSET AND JOURDANTON WITH
  RAINFALL RATES OF 2 TO 3 INCHES PER HOUR.

  ELSEWHERE...MODERATE TO HEAVY RAINS WERE NOTED WITH RAINFALL RATES
  OF ONE-HALF TO ONE AND ONE-HALF INCHES PER HOUR.

  THE RAINS WILL MOVE SLOWLY NORTH AT 5 TO 10 MPH.

  INTERSTATE-35 IS REPORTED CLOSED NEAR DERBY.

FLASH FLOODING AND RAPID RUNOFF WILL CONTINUE INTO THE EARLY
AFTERNOON HOURS...ALTHOUGH RAINFALL RATES WILL GENERALLY DECREASE.

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 2909 9879 2908 9939 2866 9940 2868 9837
          2878 9813 2915 9848 2948 9821 2971 9844
          2971 9880

3 follow-up statements

000 
WGUS74 KEWX 011815
FFSSAT
TXC013-029-163-012000-

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

...A FLASH FLOOD WARNING CONTINUES FOR BEXAR...ATASCOSA AND FRIO
COUNTIES UNTIL 300 PM CDT...

AT 110 PM CDT...WEATHER SERVICE DOPPLER RADARS SHOWED WIDESPREAD 
MODERATE TO HEAVY RAINFALL OVER THE AREA WITH RAINFALL RATES OF 
ONE-HALF TO ONE INCH PER HOUR.  ALTHOUGH RAINFALL RATES CONTINUED TO 
DECREASE...RAPID RUNOFF AND CREATE SOME AREAS OF FLASH FLOODING FOR 
THE NEXT COUPLE OF HOURS.  MEANWHILE...ADDITIONAL SHOWERS AND 
THUNDERSTORMS WERE DEVELOPING OVER DEEP SOUTH TEXAS AND THIS WILL 
MOVE INTO THE AREA LATER THIS AFTERNOON.

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 011858
FFSSAT
TXC013-029-163-012000-

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

...A FLASH FLOOD WARNING CONTINUES FOR BEXAR...ATASCOSA AND FRIO
COUNTIES UNTIL 300 PM CDT...

AT 155 PM CDT...WEATHER SERVICE DOPPLER RADARS SHOWED WIDESPREAD 
LIGHT TO MODERATE RAINFALL OVER THE AREA WITH RAINFALL RATES OF ONE 
QUARTER TO ONE HALF INCH PER HOUR.  ALTHOUGH RAINFALL RATES WILL 
CONTINUE TO DECREASE...RUNOFF WILL CREATE SOME FLASH FLOODING FOR 
THE HOUR.  MEANWHILE...ADDITIONAL SHOWERS AND THUNDERSTORMS WERE 
DEVELOPING OVER DEEP SOUTH TEXAS AND THESE WILL MOVE INTO THE AREA 
LATER THIS AFTERNOON.

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 011958
FFSSAT
TXC013-029-163-012100-

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

...THE FLASH FLOOD WARNING FOR BEXAR...ATASCOSA AND FRIO COUNTIES HAS
EXPIRED...

NATIONAL WEATHER SERVICE RADAR INDICATED THE RAINFALL HAS CONTINUED 
TO DECREASE 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.

Issued	Product	Office	Counties	Lasted
Jul 1, 4:28 AM CDT	Flash Flood Warning	EWX	Bexar	2 hr
Jul 1, 6:36 AM CDT	Flash Flood Warning	EWX	Bexar	3 hr
Jul 1, 6:56 AM CDT	Flash Flood Warning	EWX	Gonzales, Guadalupe	2 hr
Jul 1, 7:48 AM CDT	Flash Flood Warning	EWX	Atascosa	117 min
Jul 1, 8:50 AM CDT	Flash Flood Warning	EWX	Frio	3 hr
Jul 1, 9:31 AM CDT	Flash Flood Warning	EWX	Atascosa, Bexar	2 hr
Jul 1, 12:07 PM CDT	Flash Flood Warning	EWX	Dimmit, Zavala	3 hr
Jul 1, 3:22 PM CDT	Flash Flood Warning	EWX	Kendall	3 hr
Jul 1, 4:09 PM CDT	Flash Flood Warning	EWX	Medina	3 hr
Jul 1, 5:02 PM CDT	Flash Flood Warning	EWX	Bexar	3 hr
Jul 1, 6:20 PM CDT	Flash Flood Warning	EWX	Kendall	115 min

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; radar from the NEXRAD Level II archive.