Alert archive / Texas / Flash Flood Warnings in 2002

Flash Flood Warning 192, NWS Austin/San Antonio, TX

July 30, 2002Edwards County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 30, 2002, 12:55 PM CDT for Edwards 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 counties it named.

The facts

Issued: Jul 30, 2002, 12:55 PM CDT (17:55 UTC)
Expired: Jul 30, 2002, 4:00 PM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County Edwards County, TX

The nearest sounding before it

Midland Regional, TX (KMAF), launched 12:00Z, 5.9 hours before the alert went out and 284 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1446 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -39 m²/s²
0-3 km storm-relative helicity: 56 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 301755
FFWSAT
TXC137-302100-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1254 PM CDT TUE JUL 30 2002

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

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

* UNTIL 400 PM CDT

* AT 1253 PM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY   
RAIN OVER SOUTHEAST EDWARDS COUNTY...OR ABOUT 44 MILES NORTHWEST OF 
UVALDE...MOVING NORTHEAST AT 15 MPH.  RAINFALL RATES OF UP TO 2 
INCHES PER HOUR WERE OCCURRING IN THESE THUNDERSTORMS. 

* THE THUNDERSTORM WITH EXCESSIVE RAINFALL WILL BE...
RURAL EDWARDS COUNTY AT 110 PM

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.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF CREEKS
AND STREAMS...ROADS AND ROADSIDE CULVERTS. THE HEAVY RAINS COULD ALSO
TRIGGER ROCK AND MUDSLIDES IN STEEP TERRAIN.

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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT IS
IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR
CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD AVOID
CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS.

1 follow-up statement

000 
WGUS74 KEWX 301819
FFSSAT
TXC137-302000-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
117 PM CDT TUE JUL 30 2002

...A FLASH FLOOD WARNING CONTINUES FOR EDWARDS COUNTY TIL 4 PM... 

NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS 
PRODUCING VERY HEAVY RAINFALL ACROSS EASTERN EDWARDS COUNTY.  
RAINFALL RATES OF UP TO AN INCH AND A HALF PER HOUR WERE OCCURRING 
IN THESE 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. 

ROADS...LOW BRIDGES...AND LOW WATER CROSSINGS OVER THE NUECES RIVERS 
AND TRIBUTARIES...AND HACKBERRY CREEK WILL FLOOD AND BE VERY 
DANGEROUS TO MOTORISTS THE NEXT FEW HOURS. THESE STREAMS HAVE A 
DEADLY HISTORY AND SHOULD BE APPROACHED WITH EXTREME CAUTION. 

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 29, 11:10 PM CDT	Flash Flood Warning	EWX	Uvalde	110 min
Jul 30, 1:02 AM CDT	Flash Flood Warning	EWX	Uvalde	88 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.