Alert archive / Texas / Flash Flood Warnings in 2003

Flash Flood Warning 20, NWS Austin/San Antonio, TX

April 7, 2003Kerr County, Real County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Apr 7, 2003, 6:30 PM CDT for Kerr County, Real 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 outline as issued.

The facts

Issued
Apr 7, 2003, 6:30 PM CDT (23:30 UTC)
Expired
Apr 7, 2003, 9:30 PM CDT
In force
3 hr
Issued by
NWS Austin/San Antonio, TX
Area
Counties, with a storm outline in the text

Counties Kerr County, TX, Real County, TX

Did it verify

Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Del Rio, TX (KDRT), launched 12:00Z, 11.5 hours before the alert went out and 139 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 2003-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 973 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 12:00Z on 2003-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 86 square meters per square second.1939587897Sfc1 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
973 J/kg
Mixed-layer CIN
-60 J/kg
Mixed-layer LCL
1167 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
86 m²/s²
0-3 km storm-relative helicity
183 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.0

Open this sounding in Storm Lab

The text

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

000 
WGUS54 KEWX 072330
FFWSAT
TXC265-385-080230-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
630 PM CDT MON APR 7 2003

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR THE FOLLOWING COUNTIES...
  KERR
  REAL

* UNTIL 930 PM CDT

* AT 624 PM...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY RAIN
  UP TO 2 INCHES IN NORTHERN REAL AND WESTERN KERR COUNTIES.

* THIS WARNING INCLUDES LOCATIONS IN AND AROUND...
  KERR WILDLIFE MANAGEMENT AREA
  MOUNTAIN HOME
  HUNT

RESIDENTS ALONG THE HEADWATERS OF THE GUADALUPE...FRIO...AND NUECES 
RIVERS...JOHNSON CREEK...AND PAINT CREEK SHOULD PLAY CLOSE ATTENTION 
TO RIVER LEVELS OVER THE NEXT FEW HOURS.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...NORMALLY DRY WASHES AND
ARROYOS...AS WELL AS FARMLAND ALONG THE BANKS OF CREEKS AND STREAMS.

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.

LAT...LON 3029 9976 3009 9975 3009 9997 2993 10002
          2993 9930 3029 9932

$$

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.

NWS Austin/San Antonio, TX wrote its last area forecast discussion before this flash flood warning went out at Apr 7, 2:45 PM CDT, 3 hours 45 minutes earlier.

Area forecast discussion, Apr 7, 2:45 PM CDT, 3 hours 45 minutes before
SOUTH CENTRAL TEXAS FORECAST DISCUSSION
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
245 PM CDT MON APR 7 2003

THUNDERSTORMS TRYING TO DEVELOP OVER EXTREME SE ZONES SPARKED BY
SURFACE TROUGH NEAR COAST.  HOLDING TO THE GOING SCENARIO WITH SEVERE
POSSIBLE THROUGH THE EVENING.  EXPECT SEVERE THREAT TO END WITH FRONT
STARTING TO MOVE IN AROUND MIDNIGHT AND SWEEPING THROUGH OVERNIGHT.
SOME ELEVATED CONVECTION AND OVERRUNNING RAIN IN STORE FOR THE LATE
NIGHT HOURS THROUGH TUESDAY MORNING WITH CLEARING TO FOLLOW TUESDAY
AFTERNOON.  WINDS WILL PICK UP RAPIDLY WITH FRONT AND BY MORNING
ZONE TIME SHOULD BE CLOSE TO WIND ADVISORY CRITERIA.  WILL GO WITH
CAUTION ON AREA LAKES AFTER MIDNIGHT WITH LATER SHIFTS NEEDING TO
ISSUE WIND ADVISORY FOR TUESDAY MORNING.  WINDS SHOULD EASE DURING
THE AFTERNOON.  NOT LOOKING FOR THIS SYSTEM TO BE A MAJOR RAIN
PRODUCER...ALTHOUGH A FEW SLOW MOVING CELLS WILL PRODUCE LOCALLY
HEAVY AMOUNTS.   QUITE CHILLY TUESDAY NIGHT AND AGAIN WEDNESDAY
NIGHT.  SLOW WARMING LATE WEEK WITH DRY WEATHER PREVAILING WITH
STRONG UPPER RIDGE.  GULF REOPENS EARLY NEXT WEEK WITH CLOUDS
INCREASING MONDAY.

PRELIMS...
AUS NB 048/065 031/068 035 5300
DRT NB 054/065 042/075 046 5300
SAT NB 052/065 037/070 041 5300

.EWX...NONE.

3/8/PM
Hazardous weather outlook, Apr 7, 5:00 PM CDT, 1 hour 30 minutes before
TXZ171>173-183>194-202>209-217>225-228-081100-

HAZARDOUS WEATHER OUTLOOK...UPDATE
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
500 PM CDT MON APR 7 2003

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL TEXAS.

.DAY ONE...
LATE THIS AFTERNOON THROUGH TONIGHT...THERE IS A SLIGHT RISK OF
SEVERE THUNDERSTORMS ACROSS ALL OF SOUTH CENTRAL TEXAS.

AN UPPER-LEVEL STORM SYSTEM AND ASSOCIATED COLD FRONT WILL MOVE
SOUTHEAST ACROSS SOUTH CENTRAL TEXAS LATE THIS AFTERNOON THROUGH
TONIGHT. THE FRONT WILL INTERACT WITH ABUNDANT LOW LEVEL MOISTURE TO
PRODUCE SCATTERED TO NUMEROUS THUNDERSTORMS MOVING SLOWLY EAST AND
SOUTHEAST ACROSS THE AREA.

WITH MODERATE SHEAR AND INSTABILITY...THE PRIMARY WEATHER THREATS
WILL BE FOR LARGE HAIL...DAMAGING WINDS...ISOLATED TORNADOES...AND
LOCALLY HEAVY RAINFALL AMOUNTS UP TO TWO INCHES. THE STORMS WILL
LIKELY BEGIN OVER THE HILL COUNTRY LATE THIS AFTERNOON WITH THE
FOCUS SHIFTING SOUTH OF SOUTH CENTRAL TEXAS SHORTLY AFTER MIDNIGHT.

.SPOTTER INFORMATION STATEMENT...
SPOTTER ACTIVATION MAY BE REQUIRED.

.DAYS TWO THROUGH SEVEN...
NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 5:32 PM CDTSevere Thunderstorm WarningEWXEdwards, Real58 min
Apr 7, 5:59 PM CDTSevere Thunderstorm WarningEWXKerr61 min

Nearby

Flash Flood Warnings in Texas, 2003Every flash flood warning in 2003

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.