Alert archive / Texas / Flash Flood Warnings in 1999

Flash Flood Warning 88, NWS Austin/San Antonio, TX

July 11, 1999Lee County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 11, 1999, 3:20 PM CDT for Lee County, Texas. It was in force for 100 min. 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 11, 1999, 3:20 PM CDT (20:20 UTC)
Expired
Jul 11, 1999, 5:00 PM CDT
In force
100 min
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Lee County, TX

The radar

The Ft Hood radar (KGRK), 61 km from the middle of the area, began a volume at 20:23 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

Fort Worth, TX (KFWD), launched 12:00Z, 8.3 hours before the alert went out and 282 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, Fort Worth, TX at 12:00Z on 1999-07-11Temperature 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, Fort Worth, TX at 12:00Z on 1999-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -11 square meters per square second.1939Sfc1 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
1222 m above ground
0-6 km bulk shear
3 kt
0-1 km storm-relative helicity
-11 m²/s²
0-3 km storm-relative helicity
14 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 
TTAA00 KEWX 112024
FFWSAT
TXC287-112115-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
320 PM CDT SUN JUL 11 1999

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

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES IN TEXAS...
  LEE COUNTY

* UNTIL 500 PM CDT

*AT 320 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED HEAVY 
THUNDERSTORMS WITH RAINFALL RATES IN EXCESS OF 2 INCHES AN HOUR 
MOVING INTO THE WESTERN PORTIONS OF LEE COUNTY WITH OTHER DEVELOPING 
HEAVY THUNDERSTORMS BETWEEN LEXINGTON AND GIDDINGS. MOVEMENT WAS TO 
THE NORTHEAST AT 15 MPH.   

EXCESSIVE RUNOFF FROM THESE STORMS WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...LOW WATER CROSSINGS AND UNDERPASSES.
ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS
AND STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

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.

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 10, 10:45 PM CDTFlash Flood WarningEWXBandera2 hr
Jul 11, 3:30 AM CDTFlash Flood WarningEWXMedina, Uvalde4 hr
Jul 11, 7:15 AM CDTFlash Flood WarningEWXBandera, Medina, Uvalde5 hr
Jul 11, 8:00 AM CDTFlash Flood WarningEWXVal Verde4 hr
Jul 11, 8:31 AM CDTFlash Flood WarningEWXKendall3 hr
Jul 11, 11:50 AM CDTFlash Flood WarningEWXVal Verde3 hr
Jul 11, 6:10 PM CDTFlash Flood WarningEWXKarnes110 min
Jul 11, 6:47 PM CDTFlash Flood WarningEWXBexar, Comal, Kendall2 hr
Jul 11, 6:47 PM CDTFlash Flood WarningEWXBandera, Real, Uvalde2 hr
Jul 11, 6:47 PM CDTFlash Flood WarningEWXMedina2 hr

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; radar from the NEXRAD Level II archive.