Alert archive / Texas / Flash Flood Warnings in 1998

Flash Flood Warning 31, NWS Austin/San Antonio, TX

March 15, 1998Dimmit County, Zavala County, Texas

NWS Austin/San Antonio, TX issued this flash flood warning at Mar 15, 1998, 11:44 PM CST for Dimmit County, Zavala 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 15, 1998, 11:44 PM CST (05:44 UTC)
Expired: Mar 16, 1998, 2:45 AM CST
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Whole counties

Counties Dimmit County, TX, Zavala County, TX

The nearest sounding before it

Del Rio, TX (KDRT), launched 00:00Z, 5.7 hours before the alert went out and 133 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1211 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 840 m above ground
0-6 km bulk shear: 68 kt
0-1 km storm-relative helicity: 88 m²/s²
0-3 km storm-relative helicity: 123 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 3.5

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KSAT 160545
FFWSAT
TXC127-507-160845-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1144 PM CST SUN MAR 15 1998
 
THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  245 AM CST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...
 
IN SOUTH CENTRAL TEXAS
 
   ...DIMMIT COUNTY...ZAVALA COUNTY
 
NATIONAL WEATHER SERVICE RADAR INDICATED STRONG THUNDERTORMS ACROSS
DIMMIT AND ZAVALA COUNTIES. ONE TO TWO INCHES OF RAIN HAVE FALLEN AND
ADDITIONAL HEAVY RAINS ARE EXPECTED THROUGH 3 AM.
 
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 AND OTHER
PEOPLE IN RECREATION AREAS ALONG CREEKS...STREAMS...AND RIVERS IN
THE WARNING AREA SHOULD MOVE TO HIGH GROUND IMMEDIATELY.

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, Mar 15, 6:00 PM CST, 5 hours 44 minutes before

TXZ171>173-183>194-202>209-217>225-228-161200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
600 PM CST SUN MAR 15 1998

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT INTO MONDAY
MORNING FOR SOUTH CENTRAL TEXAS AND THE TEXAS HILL COUNTRY.  A FLASH
FLOOD WATCH IS ALSO IN EFFECT TONIGHT THROUGH MONDAY MORNING FOR ALL
OF SOUTH CENTRAL TEXAS AND THE TEXAS HILL COUNTRY.

A STRONG UPPER LEVEL STORM SYSTEM IS CURRENTLY LOCATED OVER WEST
TEXAS.  THE ATMOSPHERE OVER SOUTH CENTRAL TEXAS AND THE TEXAS HILL
COUNTRY HAS BECOME VERY MOIST AND UNSTABLE.  THIS COMBINATION WILL
LEAD TO WIDESPREAD THUNDERSTORMS DEVELOPING THIS EVENING AND
CONTINUING THROUGH THE OVERNIGHT HOURS AND MONDAY MORNING.  SOME OF
THE STORMS WILL LIKELY BECOME SEVERE WITH LARGE HAIL AND DAMAGING
WINDS POSSIBLE.

AS THE THUNDERSTORMS BECOME MORE WIDESPREAD TONIGHT...CONDITIONS WILL
BECOME FAVORABLE FOR HEAVY RAINFALL.  GENERAL RAINFALL AMOUNTS
TONIGHT THROUGH MONDAY MORNING WILL AVERAGE 1 TO 2 INCHES.  SCATTERED
AREAS WILL SEE RAINFALL TOTALS OF 3 TO 5 INCHES WITH ISOLATED TOTALS
GREATER THAN 5 INCHES POSSIBLE FROM THE SLOWER MOVING STORMS OR WHERE
SEVERAL STORMS TRAVEL OVER THE SAME LOCATION.  THESE AMOUNTS WILL
LIKELY PRODUCE FLOODING AND FLASH FLOODING.

THE STORM SYSTEM WILL MOVE ACROSS THE SOUTH CENTRAL TEXAS AND THE
TEXAS HILL COUNTRY DURING THE DAYLIGHT HOURS ON MONDAY.  AS A
RESULT...SCATTERED SHOWERS AND A FEW THUNDERSTORMS WILL LINGER ACROSS
SOUTH CENTRAL TEXAS MONDAY AFTERNOON.  RAINFALL WILL AVERAGE LESS
THAN HALF AN INCH MONDAY AFTERNOON.

THE STORM SYSTEM WILL MOVE EAST OF THE AREA BY MONDAY NIGHT WITH
SHOWERS AND THUNDERSTORMS ENDING MONDAY EVENING.

RESIDENTS OF SOUTH CENTRAL TEXAS SHOULD MONITOR NOAA WEATHER RADIO...
LOCAL RADIO AND TV...AND CABLE TV STATIONS FOR THE LATEST WEATHER
FORECASTS AND ADVISORIES UNTIL THIS STORM PASSES.

NEARBY HAZARDOUS WEATHER OUTLOOKS INCLUDE:
FOR SOUTHWEST TEXAS...FROM MIDLAND...LBBSPSMAF
FOR THE CONCHO VALLEY...FROM SAN ANGELO...LBBSPSSJT
FOR NORTH TEXAS...FROM FORT WORTH...FTWSPSFTW
FOR SOUTHEAST TEXAS...FROM HOUSTON/GALVESTON...SATSPSHOU
FOR COASTAL BEND/RIO GRANDE PLAINS...FROM CORPUS CHRISTI...SATSPSCRP.

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.

ADDITIONAL WEATHER INFORMATION IS AVAILABLE ON THE NATIONAL WEATHER
SERVICE CENTRAL AND SOUTH CENTRAL TEXAS HOME PAGE OF THE INTERNET
WORLD WIDE WEB AT www.srh.noaa.gov/ewx OR TUNE TO THE CLOSEST NOAA
WEATHER RADIO STATION OPERATING ON A FREQUENCY BETWEEN 162.400 MHz
AND 162.550 MHz.

Special weather statement, Mar 15, 6:00 PM CST, 5 hours 44 minutes before

TXZ171>173-183>194-202>209-217>225-228-161200-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
600 PM CST SUN MAR 15 1998

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TONIGHT INTO MONDAY
MORNING FOR SOUTH CENTRAL TEXAS AND THE TEXAS HILL COUNTRY.  A FLASH
FLOOD WATCH IS ALSO IN EFFECT TONIGHT THROUGH MONDAY MORNING FOR ALL
OF SOUTH CENTRAL TEXAS AND THE TEXAS HILL COUNTRY.

A STRONG UPPER LEVEL STORM SYSTEM IS CURRENTLY LOCATED OVER WEST
TEXAS.  THE ATMOSPHERE OVER SOUTH CENTRAL TEXAS AND THE TEXAS HILL
COUNTRY HAS BECOME VERY MOIST AND UNSTABLE.  THIS COMBINATION WILL
LEAD TO WIDESPREAD THUNDERSTORMS DEVELOPING THIS EVENING AND
CONTINUING THROUGH THE OVERNIGHT HOURS AND MONDAY MORNING.  SOME OF
THE STORMS WILL LIKELY BECOME SEVERE WITH LARGE HAIL AND DAMAGING
WINDS POSSIBLE.

AS THE THUNDERSTORMS BECOME MORE WIDESPREAD TONIGHT...CONDITIONS WILL
BECOME FAVORABLE FOR HEAVY RAINFALL.  GENERAL RAINFALL AMOUNTS
TONIGHT THROUGH MONDAY MORNING WILL AVERAGE 1 TO 2 INCHES.  SCATTERED
AREAS WILL SEE RAINFALL TOTALS OF 3 TO 5 INCHES WITH ISOLATED TOTALS
GREATER THAN 5 INCHES POSSIBLE FROM THE SLOWER MOVING STORMS OR WHERE
SEVERAL STORMS TRAVEL OVER THE SAME LOCATION.  THESE AMOUNTS WILL
LIKELY PRODUCE FLOODING AND FLASH FLOODING.

THE STORM SYSTEM WILL MOVE ACROSS THE SOUTH CENTRAL TEXAS AND THE
TEXAS HILL COUNTRY DURING THE DAYLIGHT HOURS ON MONDAY.  AS A
RESULT...SCATTERED SHOWERS AND A FEW THUNDERSTORMS WILL LINGER ACROSS
SOUTH CENTRAL TEXAS MONDAY AFTERNOON.  RAINFALL WILL AVERAGE LESS
THAN HALF AN INCH MONDAY AFTERNOON.

THE STORM SYSTEM WILL MOVE EAST OF THE AREA BY MONDAY NIGHT WITH
SHOWERS AND THUNDERSTORMS ENDING MONDAY EVENING.

RESIDENTS OF SOUTH CENTRAL TEXAS SHOULD MONITOR NOAA WEATHER RADIO...
LOCAL RADIO AND TV...AND CABLE TV STATIONS FOR THE LATEST WEATHER
FORECASTS AND ADVISORIES UNTIL THIS STORM PASSES.

NEARBY HAZARDOUS WEATHER OUTLOOKS INCLUDE:
FOR SOUTHWEST TEXAS...FROM MIDLAND...LBBSPSMAF
FOR THE CONCHO VALLEY...FROM SAN ANGELO...LBBSPSSJT
FOR NORTH TEXAS...FROM FORT WORTH...FTWSPSFTW
FOR SOUTHEAST TEXAS...FROM HOUSTON/GALVESTON...SATSPSHOU
FOR COASTAL BEND/RIO GRANDE PLAINS...FROM CORPUS CHRISTI...SATSPSCRP.

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.

ADDITIONAL WEATHER INFORMATION IS AVAILABLE ON THE NATIONAL WEATHER
SERVICE CENTRAL AND SOUTH CENTRAL TEXAS HOME PAGE OF THE INTERNET
WORLD WIDE WEB AT www.srh.noaa.gov/ewx OR TUNE TO THE CLOSEST NOAA
WEATHER RADIO STATION OPERATING ON A FREQUENCY BETWEEN 162.400 MHz
AND 162.550 MHz.

Local storm report, Mar 15, 8:56 PM CST, 2 hours 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TEXAS
856 PM CST SUN MAR 15 1998

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0400 PM    COMSTOCK 5NW              TX   .75 INCH HAIL
03/15/98   VAL VERDE                      REPORTED BY COOP OBSERVER
                                          AT KELLY RANCH

0640 PM    LANGTRY 13W               TX   .75 INCH HAIL
03/15/98   VAL VERDE                      RAINFALL OD .80 IN 20-30 MIN

Local storm report, Mar 15, 8:56 PM CST, 2 hours 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TEXAS
856 PM CST SUN MAR 15 1998

TIME(CST)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0400 PM    COMSTOCK 5NW              TX   .75 INCH HAIL
03/15/98   VAL VERDE                      REPORTED BY COOP OBSERVER
                                          AT KELLY RANCH

0640 PM    LANGTRY 13W               TX   .75 INCH HAIL
03/15/98   VAL VERDE                      RAINFALL OD .80 IN 20-30 MIN

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 15, 7:57 PM CST	Flash Flood Warning	EWX	Val Verde	2 hr
Mar 15, 8:45 PM CST	Flash Flood Warning	EWX	Edwards	3 hr
Mar 15, 11:53 PM CST	Severe Thunderstorm Warning	EWX	Zavala	67 min
Mar 16, 12:28 AM CST	Severe Thunderstorm Warning	EWX	Frio	62 min
Mar 16, 12:46 AM CST	Flash Flood Warning	EWX	Bandera, Bexar, Frio, Medina	3 hr
Mar 16, 12:46 AM CST	Flash Flood Warning	EWX	Gillespie, Kendall, Kerr	3 hr
Mar 16, 12:46 AM CST	Flash Flood Warning	EWX	Blanco, Comal	3 hr
Mar 16, 12:46 AM CST	Flash Flood Warning	EWX	Burnet, Llano	3 hr
Mar 16, 1:31 AM CST	Severe Thunderstorm Warning	EWX	Atascosa	59 min
Mar 16, 2:32 AM CST	Severe Thunderstorm Warning	EWX	Comal	58 min
Mar 16, 3:01 AM CST	Severe Thunderstorm Warning	EWX	Guadalupe, Hays	59 min
Mar 16, 3:01 AM CST	Severe Thunderstorm Warning	EWX	Wilson	59 min

Nearby

Flash Flood Warnings in Texas, 1998 Every flash flood warning in 1998

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.