Alert archive / Texas / Flash Flood Warnings in 1999

Flash Flood Warning 82, NWS Austin/San Antonio, TX

July 10, 1999Bandera County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Jul 10, 1999, 10:45 PM CDT for Bandera County, Texas. It was in force for 2 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 10, 1999, 10:45 PM CDT (03:45 UTC)
Expired
Jul 11, 1999, 12:45 AM CDT
In force
2 hr
Issued by
NWS Austin/San Antonio, TX
Area
Whole counties

County Bandera County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 3.8 hours before the alert went out and 160 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 1999-07-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1412 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 1999-07-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 13 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
1412 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
1085 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
13 m²/s²
0-3 km storm-relative helicity
-10 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 110350
FFWSAT
TXC019-110545-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1045 PM CDT SAT JUL 10 1999

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

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

* UNTIL 1245 AM CDT

* AT 1043 PM CDT...DOPPLER RADAR INDICATED SLOW MOVING THUNDERSTORMS 
  ACROSS BANDERA COUNTY WITH THE HEAVIEST RAINS OCCURRING EAST OF 
  MEDINA.  RAINFALL RATES WERE ESTIMATED AT 2 INCHES AN HOUR. 

* THIS WARNING INCLUDES LOCATIONS IN AND AROUND...
  MEDINA
  BANDERA
  PIPE CREEK 

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLA\SH 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.

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

Special weather statement, Jul 10, 6:34 PM CDT, 4 hours 11 minutes before
TXZ171>173-183>194-202>209-217>225-228-111200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
634 PM CDT SAT JUL 10 1999

...A FLASH FLOOD WATCH IS IN EFFECT TONIGHT FOR PORTIONS OF THE
   TEXAS HILL COUNTRY...

NUMEROUS SHOWERS AND THUNDERSTORMS WILL PERSIST THROUGH THE EVENING
HOURS ACROSS MUCH OF SOUTH CENTRAL TEXAS AND THE TEXAS HILL COUNTRY.
THE ACTIVITY SHOULD BEGIN TO DIMINISH AROUND MIDNIGHT AND BECOME
ISOLATED DURING THE EARLY MORNING HOURS.

SOME OF THE EVENING STORMS COULD CONTAIN LOCALLY HEAVY RAINFALL
IN EXCESS OF AN INCH OR TWO...WHICH WILL LIKELY PRODUCE LOCALIZED
FLOODING OF LOW-LYING AREAS...CREEKS...STREETS AND ROADS...AND
LOW-WATER CROSSINGS.

THE GREATEST THREAT FROM THIS TROPICAL ACTIVITY WILL BE IN THE FORM
OF LOCALLY HEAVY RAINFALL...BUT GUSTY WINDS AND LIGHTNING COULD
ACCOMPANY SOME OF THE HEAVIER THUNDERSTORMS...WHICH WILL REDEVELOP
DURING THE LATE MORNING AND AFTERNOON SUNDAY.

THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF
THE ZONE FORECASTS...SHORT TERM FORECAST...WATCHES...WARNINGS AND
ADVISORIES.  THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED
ONLY IF UNEXPECTED HAZARDOUS WEATHER DEVELOPS OR IF EXPECTED
HAZARDOUS WEATHER NO LONGER IS FORECAST TO DEVELOP.

FOR INFORMATION ON WEATHER THREATS IN AREAS SURROUNDING SOUTH
CENTRAL TEXAS...PLEASE REFER TO THE HAZARDOUS WEATHER OUTLOOKS
FROM NWS OFFICES IN MIDLAND...SAN ANGELO...FORT WORTH...CORPUS
CHRISTI AND HOUSTON/GALVESTON.
Special weather statement, Jul 10, 6:34 PM CDT, 4 hours 11 minutes before
TXZ171>173-183>194-202>209-217>225-228-111200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
634 PM CDT SAT JUL 10 1999

...A FLASH FLOOD WATCH IS IN EFFECT TONIGHT FOR PORTIONS OF THE
   TEXAS HILL COUNTRY...

NUMEROUS SHOWERS AND THUNDERSTORMS WILL PERSIST THROUGH THE EVENING
HOURS ACROSS MUCH OF SOUTH CENTRAL TEXAS AND THE TEXAS HILL COUNTRY.
THE ACTIVITY SHOULD BEGIN TO DIMINISH AROUND MIDNIGHT AND BECOME
ISOLATED DURING THE EARLY MORNING HOURS.

SOME OF THE EVENING STORMS COULD CONTAIN LOCALLY HEAVY RAINFALL
IN EXCESS OF AN INCH OR TWO...WHICH WILL LIKELY PRODUCE LOCALIZED
FLOODING OF LOW-LYING AREAS...CREEKS...STREETS AND ROADS...AND
LOW-WATER CROSSINGS.

THE GREATEST THREAT FROM THIS TROPICAL ACTIVITY WILL BE IN THE FORM
OF LOCALLY HEAVY RAINFALL...BUT GUSTY WINDS AND LIGHTNING COULD
ACCOMPANY SOME OF THE HEAVIER THUNDERSTORMS...WHICH WILL REDEVELOP
DURING THE LATE MORNING AND AFTERNOON SUNDAY.

THE HAZARDOUS WEATHER OUTLOOK NORMALLY WILL BE UPDATED BY MEANS OF
THE ZONE FORECASTS...SHORT TERM FORECAST...WATCHES...WARNINGS AND
ADVISORIES.  THE HAZARDOUS WEATHER OUTLOOK ITSELF WILL BE UPDATED
ONLY IF UNEXPECTED HAZARDOUS WEATHER DEVELOPS OR IF EXPECTED
HAZARDOUS WEATHER NO LONGER IS FORECAST TO DEVELOP.

FOR INFORMATION ON WEATHER THREATS IN AREAS SURROUNDING SOUTH
CENTRAL TEXAS...PLEASE REFER TO THE HAZARDOUS WEATHER OUTLOOKS
FROM NWS OFFICES IN MIDLAND...SAN ANGELO...FORT WORTH...CORPUS
CHRISTI AND HOUSTON/GALVESTON.

The office that day

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

IssuedProductOfficeCountiesLasted
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, 3:20 PM CDTFlash Flood WarningEWXLee100 min
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.