Alert archive / Texas / Flash Flood Warnings in 1999
Flash Flood Warning 14, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Apr 24, 1999, 12:02 PM CDT for Val Verde County, Texas. It was in force for 118 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
- Apr 24, 1999, 12:02 PM CDT (17:02 UTC)
- Expired
- Apr 24, 1999, 2:00 PM CDT
- In force
- 118 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Val Verde County, TX
The radar
The Laughlin AFB radar (KDFX), 109 km from the middle of the area, began a volume at 17:04 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
Del Rio, TX (KDRT), launched 12:00Z, 5.0 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.
- Mixed-layer CAPE
- 2922 J/kg
- Mixed-layer CIN
- -23 J/kg
- Mixed-layer LCL
- 522 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 126 m²/s²
- 0-3 km storm-relative helicity
- 169 m²/s²
- Significant tornado parameter
- 1.6
- Supercell composite
- 8.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KEWX 241704 FFWSAT TXC465-241900- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1202 PM CDT SAT APR 24 1999 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR... VAL VERDE COUNTY * UNTIL 200 PM CDT * THUNDERSTORMS MOVING NORTHWARD ACROSS THE CITY OF DEL RIO HAVE PRODUCED AS MUCH AS TWO INCHES OF RAIN THIS MORNING. LAW ENFORCEMENT OFFICIALS REPORT SOME STREET FLOODING IN THE CITY...ESPECIALLY ALONG HIGHWAY 90. ADDITIONAL THUNDERSTORMS ARE EXPECTED THROUGH THE EARLY AFTERNOON. RUNOFF FROM ADDITIONAL RAIN WILL PROLONG FLOODING IN LOW LYING AREAS AND LOW WATER CROSSINGS. RESIDENTS OF SOUTHERN VAL* VERDE COUNTY AND MOTORISTS TRAVELING BETWEEN LAKE AMISTAD AND LAUGHLIN AIR BASE SHOULD BE ALERT TO RISING WATER.
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, Apr 24, 6:10 AM CDT, 5 hours 52 minutes before
TXZ171>173-183>194-202>209-217>225-228-250000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 610 AM CDT SAT APR 24 1999 SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND TONIGHT AS A COLD FRONT SAGS SOUTHWARD OVER THE HILL COUNTRY AND CONVERGES WITH MOIST...UNSTABLE AIR TO THE EAST AND SOUTH. WITH A TROPICAL PLUME OF MOISTURE ALOFT...SOME OF THE STORMS DEVELOPING ALONG AND JUST NORTH OF THE FRONT OVER PORTIONS OF THE HILL COUNTRY COULD BECOME HEAVY WITH FLOODING OF LOW LYING OR FLOOD PRONE AREAS. PERSONS TRAVELING ACROSS THE HILL COUNTRY THIS AFTERNOON INTO THIS EVENING SHOULD BE ALERT TO THE POSSIBILITY OF LOCALIZED FLOODING AND AVOID LOW WATER CROSSINGS IN HEAVY RAINFALL. RAINFALL AMOUNTS COULD AVERAGE 1/2 INCH ACROSS NORTHERN AND CENTRAL PORTIONS OF THE HILL COUNTRY TODAY AND TONIGHT WITH THE REMAINDER OF SOUTH CENTRAL TEXAS RECEIVING AMOUNTS GENERALLY A QUARTER OF AN INCH OR LESS. LOCALIZED AMOUNTS GREATER THAN 1 AND 1/2 INCHES ARE POSSIBLE IN THE HILL COUNTRY IN SOME OF THE HEAVIER THUNDERSTORMS. 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...HOUSTON/GALVESTON AND CORPUS CHRISTI.
Special weather statement, Apr 24, 6:10 AM CDT, 5 hours 52 minutes before
TXZ171>173-183>194-202>209-217>225-228-250000- HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 610 AM CDT SAT APR 24 1999 SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED TO DEVELOP THIS AFTERNOON AND TONIGHT AS A COLD FRONT SAGS SOUTHWARD OVER THE HILL COUNTRY AND CONVERGES WITH MOIST...UNSTABLE AIR TO THE EAST AND SOUTH. WITH A TROPICAL PLUME OF MOISTURE ALOFT...SOME OF THE STORMS DEVELOPING ALONG AND JUST NORTH OF THE FRONT OVER PORTIONS OF THE HILL COUNTRY COULD BECOME HEAVY WITH FLOODING OF LOW LYING OR FLOOD PRONE AREAS. PERSONS TRAVELING ACROSS THE HILL COUNTRY THIS AFTERNOON INTO THIS EVENING SHOULD BE ALERT TO THE POSSIBILITY OF LOCALIZED FLOODING AND AVOID LOW WATER CROSSINGS IN HEAVY RAINFALL. RAINFALL AMOUNTS COULD AVERAGE 1/2 INCH ACROSS NORTHERN AND CENTRAL PORTIONS OF THE HILL COUNTRY TODAY AND TONIGHT WITH THE REMAINDER OF SOUTH CENTRAL TEXAS RECEIVING AMOUNTS GENERALLY A QUARTER OF AN INCH OR LESS. LOCALIZED AMOUNTS GREATER THAN 1 AND 1/2 INCHES ARE POSSIBLE IN THE HILL COUNTRY IN SOME OF THE HEAVIER THUNDERSTORMS. 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...HOUSTON/GALVESTON AND CORPUS CHRISTI.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 11:51 AM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 49 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; radar from the NEXRAD Level II archive.