Alert archive / Texas / Flash Flood Warnings in 1999
Flash Flood Warning 34, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at May 26, 1999, 8:56 PM CDT for Gonzales 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
- May 26, 1999, 8:56 PM CDT (01:56 UTC)
- Expired
- May 27, 1999, 12:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Gonzales County, TX
The radar
The Austin/San Antonio radar (KEWX), 59 km from the middle of the area, began a volume at 01:58 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
Corpus Christi, TX (KCRP), launched 00:00Z, 1.9 hours before the alert went out and 193 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
- 1680 J/kg
- Mixed-layer CIN
- -167 J/kg
- Mixed-layer LCL
- 975 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- -32 m²/s²
- 0-3 km storm-relative helicity
- 13 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KEWX 270159 FFWSAT TXC177-270500- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 856 PM CDT WED MAY 26 1999 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR THE FOLLOWING... GONZALES COUNTY IN TEXAS * UNTIL MIDNIGHT CDT * AT 855 PM CDT...DOPPLER RADAR INDICATED STRONG THUNDERSTORMS PRODUCING RAINFALL AT THE RATE OF 2 TO 3 INCHES AN HOUR. THESE STORMS WERE MERGING OVER GONZALES COUNTY. MOVEMENT WAS EAST AT 15 TO 20 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. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT QUICKLYh. 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, May 26, 5:07 PM CDT, 3 hours 49 minutes before
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
Special weather statement, May 26, 5:07 PM CDT, 3 hours 49 minutes before
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
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 26, 7:16 PM CDT | Severe Thunderstorm Warning | EWX | Gillespie, Kerr | 59 min |
| May 26, 7:43 PM CDT | Severe Thunderstorm Warning | EWX | Lee | 47 min |
| May 26, 8:11 PM CDT | Severe Thunderstorm Warning | EWX | Kerr | 34 min |
| May 26, 8:38 PM CDT | Severe Thunderstorm Warning | EWX | Kendall | 67 min |
| May 26, 8:45 PM CDT | Severe Thunderstorm Warning | EWX | Bandera, Kerr | 45 min |
| May 26, 9:26 PM CDT | Severe Thunderstorm Warning | EWX | Bandera | 34 min |
| May 26, 10:25 PM CDT | Flash Flood Warning | EWX | Bexar, Guadalupe | 3 hr |
| May 27, 3:00 AM CDT | Severe Thunderstorm Warning | EWX | Gillespie, Llano | 75 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.