Alert archive / Texas / Flash Flood Warnings in 1999

Flash Flood Warning 13, NWS Austin/San Antonio, TX

March 27, 1999Val Verde County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Mar 27, 1999, 5:41 PM CST for Val Verde 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
Mar 27, 1999, 5:41 PM CST (23:41 UTC)
Expired
Mar 27, 1999, 8:35 PM CST
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Val Verde County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 11.7 hours before the alert went out and 66 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 12:00Z on 1999-03-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 1999-03-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 324 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
507 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
324 m²/s²
0-3 km storm-relative helicity
353 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.2

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 272341
FFWSAT
TXC465-280235-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
541 PM CST SAT MAR 27 1999

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  VAL VERDE COUNTY IN TEXAS

* UNTIL 835 PM CST

* AT 535 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A BAND OF HEAVY THUNDERSTORMS PRODUCED ESTIMATED RAINFALL
  TOTALS NEAR 3 INCHES IN THE LAST 3 HOURS ALONG THE DEVILS RIVER
  BASIN OVER CENTRAL AND SOUTHERN VAL VERDE COUNTY...WITH MODERATE
  RAINFALL CONTINUING.

  DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD!

AREA RESIDENTS SHOULD MONITOR FLOOD CONDITIONS... AND BE PREPARpED
TO MOVE TO HIGHER GROUND... SHOULD FLOOD WATERS THREATEN. 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.

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 27, 4:55 PM CSTTornado WarningEWXKinney, Val Verde60 min
Mar 27, 5:20 PM CSTSevere Thunderstorm WarningEWXMaverick60 min
Mar 27, 5:29 PM CSTSevere Thunderstorm WarningEWXEdwards61 min
Mar 27, 5:55 PM CSTSevere Thunderstorm WarningEWXUvalde, Zavala90 min

Nearby

Flash Flood Warnings in Texas, 1999Every flash flood warning in 1999

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.