Alert archive / Texas / Flash Flood Warnings in 1999
Flash Flood Warning 12, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Mar 18, 1999, 2:49 PM CST for Llano County, Texas. It was in force for 2 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 18, 1999, 2:49 PM CST (20:49 UTC)
- Expired
- Mar 18, 1999, 5:00 PM CST
- In force
- 2 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Whole counties
County Llano County, TX
The radar
The Ft Hood radar (KGRK), 124 km from the middle of the area, began a volume at 20:49 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, 8.8 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 182048 FFWSAT TXC299-182300- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX 249 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 500 PM CST * AT 230 PM CST... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED SHOWERS AND THUNDERSTORMS MOVING NORTHEAST INTO LLANO COUNTY FROM THE SOUTHWEST AT 30 MPH. * FLOODING WILL PERSIST FOR THE NEXT SEVERAL HOURS AS TRAINING OF MODERATE TO HEAVY SHOWERS AND THUNDERSTORMS NORTHEAST ACROSS LLANO COUNTY WILL CONTINUE...OVER AREAS WHERE RADAR ESTIMATES NEAR 6+ INCHES HAVE BEEN ALREADY VERIFIED BY GROUND OBSERVATIONS. DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD! RESIDENTS OF SANDY HARBOR AT THE LOWER END OF SANDY CREEK SHOULD MONITOR NOAA WEATHER RADIO FOR ADDITIONAL RAINFALL AND FLOOD STATEMENTS AND WARNINGS. BOAT AND DOCK OWNERS IN THE` LOWER LLANO RIVER AND LOWER SANDY CREEK SHOULD LOOSEN BOAT AND DOCK TIES...AND KEEP ABREAST OF ONGOING FLOOD STATEMENTS AND WARNINGS.
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, 12:41 PM CST | Flash Flood Warning | EWX | Llano | 114 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.