Alert archive / Texas / Flash Flood Warnings in 2024
Flash Flood Warning 21, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Sep 3, 2024, 9:29 PM CDT for 5 counties in Texas. It was in force for 3 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Sep 3, 2024, 9:29 PM CDT (02:29 UTC)
- Expired
- Sep 4, 2024, 12:30 AM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Blanco County, TX, Burnet County, TX, Gillespie County, TX, Llano County, TX, Travis County, TX
The radar
The Austin/San Antonio radar (KEWX), 87 km from the middle of the area, began a volume at 02:32 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 3, 10:12 PM CDT | FLASH FLOOD | 1 S Horseshoe Bay, TX | Several low water crossings reported flooded along Slickrock Creek in Horseshoe Bay per atxfloods.com. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Del Rio, TX (KDRT), launched 00:00Z, 2.5 hours before the alert went out and 269 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
- 120 J/kg
- Mixed-layer CIN
- -87 J/kg
- Mixed-layer LCL
- 841 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- -31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
144
WGUS54 KEWX 040229
FFWEWX
TXC031-053-171-299-453-040530-
/O.NEW.KEWX.FF.W.0021.240904T0229Z-240904T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
929 PM CDT Tue Sep 3 2024
The National Weather Service in Austin/San Antonio has issued a
* Flash Flood Warning for...
Northern Blanco County in south central Texas...
Southwestern Burnet County in south central Texas...
Northeastern Gillespie County in south central Texas...
Southern Llano County in south central Texas...
Northwestern Travis County in south central Texas...
* Until 1230 AM CDT.
* At 929 PM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
2 and 4 inches of rain have fallen. Additional rainfall amounts of
1 to 2 inches are possible in the warned area. Flash flooding is
already occurring with several low water crossings reported
flooded.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Marble Falls, Round Mountain, Lakeway, Lago Vista, Bee Cave,
Granite Shoals, Horseshoe Bay, Hudson Bend, The Hills,
Meadowlakes, Cypress Mill, Blowout, Spicewood, Enchanted Rock
State Natural Area, Prairie Mountain, Jonestown, Briarcliff,
Cottonwood Shores, Point Venture and Sunrise Beach Village.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
&&
LAT...LON 3059 9896 3056 9840 3057 9838 3059 9835
3051 9796 3041 9792 3030 9799 3029 9803
3032 9812 3032 9813 3036 9817 3034 9818
3038 9835 3038 9859 3050 9896
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
RUNYEN1 follow-up statement
339
WGUS74 KEWX 040523
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
1223 AM CDT Wed Sep 4 2024
TXC031-053-171-299-453-040533-
/O.EXP.KEWX.FF.W.0021.000000T0000Z-240904T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Blanco TX-Burnet TX-Gillespie TX-Llano TX-Travis TX-
1223 AM CDT Wed Sep 4 2024
...FLASH FLOOD WARNING WILL EXPIRE AT 1230 AM CDT EARLY THIS MORNING
FOR NORTHERN BLANCO, SOUTHWESTERN BURNET, NORTHEASTERN GILLESPIE,
SOUTHERN LLANO AND NORTHWESTERN TRAVIS COUNTIES...
The heavy rain has ended. Please continue to heed remaining road
closures.
&&
LAT...LON 3059 9896 3056 9840 3057 9838 3059 9835
3051 9796 3041 9792 3030 9799 3029 9803
3032 9812 3032 9813 3036 9817 3034 9818
3038 9835 3038 9859 3050 9896
$$
RUNYENThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 3, 7:07 PM CDT | Areal Flood Advisory | EWX | Kendall, Kerr | 3 hr |
| Sep 3, 7:35 PM CDT | River Flood Warning | EWX | Llano | 3 hr |
| Sep 3, 8:34 PM CDT | Areal Flood Advisory | EWX | Blanco, Burnet, Travis | 3 hr |
| Sep 3, 9:00 PM CDT | Areal Flood Advisory | EWX | Blanco, Gillespie, Llano | 3 hr |
| Sep 3, 10:10 PM CDT | Areal Flood Advisory | EWX | Medina | 3 hr |
| Sep 3, 10:49 PM CDT | Areal Flood Advisory | EWX | Llano | 101 min |
| Sep 3, 11:17 PM CDT | Flash Flood Warning | EWX | Medina | 3 hr |
Nearby
Flash Flood Warnings in Texas, 2024Every flash flood warning in 2024
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.