Alert archive / Texas / Flash Flood Warnings in 1997

Flash Flood Warning 174, NWS Austin/San Antonio, TX

June 21, 1997Blanco County, Kendall County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jun 21, 1997, 8:41 PM CDT for Blanco County, Kendall County, 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
Jun 21, 1997, 8:41 PM CDT (01:41 UTC)
Expired
Jun 22, 1997, 12:45 AM CDT
In force
4 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

Counties Blanco County, TX, Kendall County, TX

The radar

The Austin/San Antonio radar (KEWX), 68 km from the middle of the area, began a volume at 01:45 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

Del Rio, TX (KDRT), launched 00:00Z, 1.7 hours before the alert went out and 235 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-pSkew-T log-p diagram, Del Rio, TX at 00:00Z on 1997-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2985 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 1997-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 139 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
2985 J/kg
Mixed-layer CIN
-30 J/kg
Mixed-layer LCL
634 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
139 m²/s²
0-3 km storm-relative helicity
280 m²/s²
Significant tornado parameter
3.2
Supercell composite
18.3

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 220141
FFWSAT
TXC031-259-265-220545-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
841 PM CDT SAT JUN 21 1997
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL 1245 AM CDT
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL TEXAS
 
   ...BLANCO COUNTY...KENDALL COUNTY...KERR COUNTY
 
AT 835 PM NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
DEVELOPING THUNDERSTORMS OVER THE EASTERN HILL COUNTY. THESE
STORMS WILL MOVE NORTH ACROSS KENDALL...EASTERN KERR...AND
BLANCO COUNTY DURING THE NEXT FEW HOURS.  MANY LOCATIONS HAVE
RECEIVED RAINFALL AMOUNTS OF 2 TO 4 INCHES WITH ISOLATED TOTALS
OF 6 TO 7 INCHES MAINLY ACROSS SOUTHERN KENDALL COUNTY. ADDITIONAL
RAINFALL AMOUNTS OF 1 TO 2 INCHES ARE POSSIBLE WITH THESE 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 UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS.  DO
NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

The office that day

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

IssuedProductOfficeCountiesLasted
Jun 21, 7:30 PM CDTFlash Flood WarningEWXKendall60 min
Jun 21, 7:30 PM CDTSevere Thunderstorm WarningEWXKendall60 min
Jun 21, 8:41 PM CDTFlash Flood WarningEWXKerr4 hr
Jun 21, 9:25 PM CDTFlash Flood WarningEWXComal3 hr
Jun 21, 10:15 PM CDTFlash Flood WarningEWXGillespie4 hr
Jun 22, 12:03 AM CDTFlash Flood WarningEWXEdwards, Real4 hr
Jun 22, 12:03 AM CDTFlash Flood WarningEWXBandera4 hr
Jun 22, 12:38 AM CDTFlash Flood WarningEWXKendall, Kerr7 hr
Jun 22, 2:15 AM CDTFlash Flood WarningEWXBastrop, Burnet, Travis, Williamson6 hr
Jun 22, 2:15 AM CDTFlash Flood WarningEWXEdwards, Real6 hr
Jun 22, 2:15 AM CDTFlash Flood WarningEWXBexar, Medina6 hr
Jun 22, 2:15 AM CDTFlash Flood WarningEWXBlanco6 hr
Jun 22, 2:57 AM CDTFlash Flood WarningEWXUvalde6 hr
Jun 22, 3:28 AM CDTFlash Flood WarningEWXBandera5 hr
Jun 22, 3:28 AM CDTFlash Flood WarningEWXComal5 hr
Jun 22, 3:28 AM CDTFlash Flood WarningEWXGillespie5 hr
Jun 22, 7:36 AM CDTFlash Flood WarningEWXBandera, Edwards, Medina, Real, Uvalde4 hr
Jun 22, 7:36 AM CDTFlash Flood WarningEWXBexar, Comal, Kendall4 hr
Jun 22, 7:36 AM CDTFlash Flood WarningEWXGillespie, Kerr4 hr
Jun 22, 7:36 AM CDTFlash Flood WarningEWXBlanco, Llano4 hr
Jun 22, 8:04 AM CDTFlash Flood WarningEWXHays4 hr
Jun 22, 8:04 AM CDTFlash Flood WarningEWXBurnet4 hr
Jun 22, 8:47 AM CDTFlash Flood WarningEWXTravis, Williamson3 hr
Jun 22, 11:15 AM CDTFlash Flood WarningEWXBandera, Bexar, Medina, Uvalde5 hr
Jun 22, 11:15 AM CDTFlash Flood WarningEWXBlanco, Gillespie, Kendall, Kerr, Llano5 hr
Jun 22, 11:15 AM CDTFlash Flood WarningEWXComal, Hays5 hr
Jun 22, 11:15 AM CDTFlash Flood WarningEWXBurnet5 hr
Jun 22, 11:15 AM CDTFlash Flood WarningEWXEdwards, Real5 hr
Jun 22, 11:20 AM CDTFlash Flood WarningEWXTravis, Williamson5 hr
Jun 22, 12:07 PM CDTFlash Flood WarningEWXGuadalupe4 hr
Jun 22, 3:58 PM CDTFlash Flood WarningEWXBandera, Bexar, Medina3 hr
Jun 22, 3:58 PM CDTFlash Flood WarningEWXBlanco, Comal, Gillespie, Kendall, Kerr3 hr
Jun 22, 3:58 PM CDTFlash Flood WarningEWXGuadalupe, Hays3 hr

Nearby

Flash Flood Warnings in Texas, 1997Every 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.