Alert archive / Texas / Flash Flood Warnings in 1999
Flash Flood Warning 11, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Mar 18, 1999, 12:41 PM CST for Llano County, Texas. It was in force for 114 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
- Mar 18, 1999, 12:41 PM CST (18:41 UTC)
- Expired
- Mar 18, 1999, 2:35 PM CST
- In force
- 114 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Llano County, TX
The nearest sounding before it
Del Rio, TX (KDRT), launched 12:00Z, 6.7 hours before the alert went out and 255 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 923 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- -130 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KSAT 181840 FFWSAT TXC299-182035- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 1241 PM CST THU MAR 18 1999 THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A * FLASH FLOOD WARNING FOR... LLANO COUNTY IN TEXAS * UNTIL 235 PM CST * AT 1230 PM CST... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A BAND OF MODERATE TO HEAVY THUNDERSTORMS CONTINUED OVER CENTRAL PORTIONS OF LLANO COUNTY...MOVING NORTHEAST AT 30 MPH. * THE LLAN0 COUNTY SHERIFFS DEPARTMENT REPORTED FM ROADS 2323 AND 152 CLOSED DUE TO HIGH WATER WITH MODERATE TO HEAVY RAINS PERSISTING OVER THE AREA. DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD! FAST RISES DOWN MINOR STREAMS AND CREEKS ACROSS LLANO COUNTY WILL FLOOD SECONDARY ROADS...LOW BRIDGES AND CROSSINGS. MOTORISTS SHOULD BE AWARE THAT WATER IN THESE CROSSINGS CAN RISE VERY QUICKLY TO A LEVEL THAT WILL STALL AUTOS AND FLOAT THEM DOWNSTREAM. RESIDENTS OF SANDY HARBOR AT THE LOWER END OF SANDY CREEK SHOULD MONITOR NOAA WEATHER RADIO FOR ADDITIONAL RAINFALL AND FLOOD STATEMENTS AND WARNINGS. MINOR RISES CAN BE EXPECTED ALONG SANDY CREEK.
The office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 17, 9:39 PM CST | Severe Thunderstorm Warning | EWX | Val Verde | 61 min |
| Mar 17, 10:46 PM CST | Severe Thunderstorm Warning | EWX | Val Verde | 59 min |
| Mar 17, 11:08 PM CST | Tornado Warning | EWX | Val Verde | 32 min |
| Mar 18, 12:49 AM CST | Severe Thunderstorm Warning | EWX | Val Verde | 76 min |
| Mar 18, 2:18 AM CST | Severe Thunderstorm Warning | EWX | Edwards | 72 min |
| Mar 18, 3:25 AM CST | Severe Thunderstorm Warning | EWX | Edwards | 60 min |
| Mar 18, 5:24 AM CST | Flash Flood Warning | EWX | Real | 3 hr |
| Mar 18, 8:47 AM CST | Flash Flood Warning | EWX | Gillespie | 3 hr |
| Mar 18, 9:31 AM CST | Flash Flood Warning | EWX | Kerr | 3 hr |
| Mar 18, 9:46 AM CST | Flash Flood Warning | EWX | Llano | 3 hr |
| Mar 18, 12:10 PM CST | Flash Flood Warning | EWX | Gillespie | 110 min |
| Mar 18, 2:49 PM CST | Flash Flood Warning | EWX | Llano | 2 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.