Alert archive / Texas / Flash Flood Warnings in 1997

Flash Flood Warning 22, NWS Austin/San Antonio, TX

April 4, 1997Lavaca County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Apr 4, 1997, 5:36 AM CST for Lavaca 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: Apr 4, 1997, 5:36 AM CST (11:36 UTC)
Expired: Apr 4, 1997, 8:45 AM CST
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

County Lavaca County, TX

The radar

The Austin/San Antonio radar (KEWX), 112 km from the middle of the area, began a volume at 11:36 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 00:00Z, 11.6 hours before the alert went out and 188 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: 1324 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 503 m above ground
0-6 km bulk shear: 62 kt
0-1 km storm-relative helicity: 90 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 3.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KSAT 041138
FFWSAT
TXC285-041445-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
536 AM CST FRI APR 4 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  845 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTH CENTRAL TEXAS
 
   ...LAVACA COUNTY
 
AT 530 AM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SCATTERED SHOWERS AND THUNDERSTORMS CONTINUING TO DEVELOP ACROSS DEWITT
AND LAVACA COUNTIES.  RAINFALL REPORTS INDICATED 1 1/2 TO 3 INCHES OF
RAIN FELL OVERNIGHT WITH ISOLATED TOTALS NEAR 4 INCHES. ANY
ADDITIONAL RAIN WILL SEND ALREADY SWOLLEN CREEKS...STREAMS...AND RIVERS
TO DANGEROUS LEVELS. LOW WATER CROSSINGS AND LOW LYING AREAS ARE LIKELY
ALREADY FLOODED. APPROACHES TO BRIDGES ALONG THE NAVIDAD RIVER WILL
FLOOD THROUGH THE DAY. A FLOOD WARNING IS IN EFFECT FOR THE NAVIDAD AND
LAVACA RIVERS TODAY.
 
AVOID ALREADY FLOODED AREAS.  TRAVELERS SHOULD NOT ATTEMPT TO
CROSS FLOODED ROADS.  IF YOUR VEHICLE STALLS...LEAVE IT AND MOVE
IMMEDIATELY TO HIGHER GROUND IF YOU CAN DO SO SAFELY.
 
 
 
&

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Local storm report, Apr 4, 12:00 AM CST, 5 hours 36 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TEXAS
1200 AM CST FRI APR 04 1997

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1145 PM    NEW BRAUNFELS             TX   PEA TO DIME SIZED HAIL
04/03/97   COMAL                          2 MILES SOUTH OF SH46 ON FM
                                          1863

1137 PM    NEW BRAUNFELS             TX   PEA TO DIME SIZED HAIL
04/03/97   COMAL                          SOUTHERN NEW BRAUNFELS

The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 3, 8:33 PM CST	Flash Flood Warning	EWX	Dimmit	42 min
Apr 3, 8:33 PM CST	Severe Thunderstorm Warning	EWX	Dimmit	42 min
Apr 3, 9:18 PM CST	Severe Thunderstorm Warning	EWX	Medina, Zavala	57 min
Apr 3, 10:36 PM CST	Flash Flood Warning	EWX	Gillespie	69 min
Apr 3, 10:47 PM CST	Flash Flood Warning	EWX	Kerr	58 min
Apr 3, 11:10 PM CST	Severe Thunderstorm Warning	EWX	Bexar	65 min
Apr 3, 11:32 PM CST	Severe Thunderstorm Warning	EWX	Comal	58 min
Apr 3, 11:55 PM CST	Severe Thunderstorm Warning	EWX	Hays	65 min
Apr 4, 12:25 AM CST	Flash Flood Warning	EWX	Williamson	65 min
Apr 4, 12:25 AM CST	Severe Thunderstorm Warning	EWX	Williamson	65 min
Apr 4, 12:43 AM CST	Severe Thunderstorm Warning	EWX	Hays	62 min
Apr 4, 1:17 AM CST	Flash Flood Warning	EWX	DeWitt, Lavaca	3 hr
Apr 4, 1:34 AM CST	Flash Flood Warning	EWX	Travis, Williamson	116 min
Apr 4, 6:23 AM CST	Flash Flood Warning	EWX	Travis, Williamson	3 hr
Apr 4, 6:31 AM CST	Flash Flood Warning	EWX	Blanco	3 hr
Apr 4, 6:43 AM CST	Flash Flood Warning	EWX	Kendall	3 hr
Apr 4, 9:24 AM CST	Flash Flood Warning	EWX	Travis, Williamson	3 hr
Apr 4, 10:12 AM CST	Flash Flood Warning	EWX	DeWitt	2 hr
Apr 4, 11:30 AM CST	Severe Thunderstorm Warning	EWX	Val Verde	60 min
Apr 4, 2:34 PM CST	Severe Thunderstorm Warning	EWX	Uvalde	56 min
Apr 4, 2:40 PM CST	Severe Thunderstorm Warning	EWX	Real	65 min
Apr 4, 3:00 PM CST	Flash Flood Warning	EWX	Real	2 hr
Apr 4, 3:25 PM CST	Flash Flood Warning	EWX	Bandera	65 min
Apr 4, 3:25 PM CST	Severe Thunderstorm Warning	EWX	Bandera	65 min
Apr 4, 3:32 PM CST	Flash Flood Warning	EWX	Uvalde	58 min
Apr 4, 3:32 PM CST	Severe Thunderstorm Warning	EWX	Uvalde	58 min
Apr 4, 3:53 PM CST	Flash Flood Warning	EWX	Kerr	2 hr
Apr 4, 4:24 PM CST	Flash Flood Warning	EWX	Bandera	2 hr
Apr 4, 4:34 PM CST	Severe Thunderstorm Warning	EWX	Medina	56 min
Apr 4, 5:11 PM CST	Severe Thunderstorm Warning	EWX	Bexar, Kendall	79 min

Nearby

Flash Flood Warnings in Texas, 1997 Every flash flood warning in 1997

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.