Alert archive / Texas / Flash Flood Warnings in 2021
Flash Flood Warning 55, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Oct 1, 2021, 4:44 AM CDT for Travis County, 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
- Oct 1, 2021, 4:44 AM CDT (09:44 UTC)
- Expired
- Oct 1, 2021, 7:45 AM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Travis County, TX
The radar
The Ft Hood radar (KGRK), 61 km from the middle of the area, began a volume at 09:47 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 |
|---|---|---|---|
| Oct 1, 4:48 AM CDT | FLASH FLOOD | 4 W Sunset Valley, TX | PAIR OF LOW WATER CROSSINGS CLOSED IN SW AUSTIN WHERE CLOSE TO 4 INCHES OF RAIN FELL IN UNDER 2 HOURS. PER ATXFLOODS. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 9.7 hours before the alert went out and 282 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
- 316 J/kg
- Mixed-layer CIN
- -174 J/kg
- Mixed-layer LCL
- 1274 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 135 m²/s²
- 0-3 km storm-relative helicity
- 258 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.1
The text
As transmitted.
053
WGUS54 KEWX 010944
FFWEWX
TXC453-011245-
/O.NEW.KEWX.FF.W.0055.211001T0944Z-211001T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
444 AM CDT Fri Oct 1 2021
The National Weather Service in Austin/San Antonio has issued a
* Flash Flood Warning for...
Central Travis County in south central Texas...
* Until 745 AM CDT.
* At 444 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2 and 3 inches of rain
have fallen. Additional rainfall amounts up to 2 inches are
possible in the warned area. Flash flooding is ongoing or expected
to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
Austin, Bee Cave, West Lake Hills, Barton Creek, Shady Hollow,
Lost Creek and Camp Mabry.
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.
Be aware of your surroundings and do not drive on flooded roads.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3044 9784 3041 9780 3038 9773 3015 9788
3023 9799
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
PLATT2 follow-up statements
031
WGUS74 KEWX 011134
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
634 AM CDT Fri Oct 1 2021
TXC453-011245-
/O.CON.KEWX.FF.W.0055.000000T0000Z-211001T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Travis TX-
634 AM CDT Fri Oct 1 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 AM CDT THIS
MORNING FOR CENTRAL TRAVIS COUNTY...
At 634 AM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 2 and 4 inches of rain have
fallen. Additional rainfall amounts up to 1 inch are possible in the
warned area. Flash flooding is ongoing or expected to begin shortly.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
Austin, Bee Cave, West Lake Hills, Barton Creek, Shady Hollow,
Lost Creek and Camp Mabry.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be especially cautious at night when it is harder to recognize the
dangers of flooding.
Be aware of your surroundings and do not drive on flooded roads.
In hilly terrain there are hundreds of low water crossings which are
potentially dangerous in heavy rain. Do not attempt to cross flooded
roads. Find an alternate route.
&&
LAT...LON 3044 9784 3041 9780 3038 9773 3015 9788
3023 9799
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
PLATT449
WGUS74 KEWX 011244
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
744 AM CDT Fri Oct 1 2021
TXC453-011254-
/O.EXP.KEWX.FF.W.0055.000000T0000Z-211001T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Travis TX-
744 AM CDT Fri Oct 1 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 745 AM CDT THIS MORNING FOR
CENTRAL TRAVIS COUNTY...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.Turn Around
Don't Drown
LAT...LON 3044 9784 3041 9780 3038 9773 3015 9788
3023 9799
$$
YURAThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 30, 7:15 PM CDT | Special Weather Statement | EWX | Terrell | 45 min |
| Sep 30, 7:49 PM CDT | Severe Thunderstorm Warning | EWX | Val Verde | 56 min |
| Sep 30, 8:40 PM CDT | Special Weather Statement | EWX | Val Verde | 50 min |
| Sep 30, 8:44 PM CDT | Special Weather Statement | EWX | Burnet | 16 min |
| Sep 30, 9:26 PM CDT | Special Weather Statement | EWX | Val Verde | 49 min |
| Sep 30, 9:55 PM CDT | Severe Thunderstorm Warning | EWX | Edwards, Val Verde | 50 min |
| Sep 30, 10:22 PM CDT | Special Weather Statement | EWX | Val Verde | 53 min |
| Sep 30, 10:41 PM CDT | Special Weather Statement | EWX | Edwards, Real | 49 min |
| Sep 30, 11:12 PM CDT | Areal Flood Advisory | EWX | Edwards, Val Verde | 3 hr |
| Sep 30, 11:19 PM CDT | Special Weather Statement | EWX | Kerr, Kinney, Real, Uvalde | 56 min |
| Sep 30, 11:33 PM CDT | Areal Flood Advisory | EWX | Val Verde | 3 hr |
| Oct 1, 12:13 AM CDT | Areal Flood Advisory | EWX | Edwards, Kerr, Real | 3 hr |
| Oct 1, 12:16 AM CDT | Special Weather Statement | EWX | Bandera, Kerr, Kinney, Uvalde | 44 min |
| Oct 1, 12:37 AM CDT | Areal Flood Advisory | EWX | Gillespie, Kerr | 3 hr |
| Oct 1, 12:48 AM CDT | Areal Flood Advisory | EWX | Kinney, Maverick, Uvalde, Val Verde | 3 hr |
| Oct 1, 12:58 AM CDT | Special Weather Statement | EWX | Uvalde | 62 min |
| Oct 1, 12:59 AM CDT | Special Weather Statement | EWX | Bandera, Gillespie, Kendall, Kerr, Llano | 46 min |
| Oct 1, 1:25 AM CDT | Areal Flood Advisory | EWX | Kinney, Uvalde, Zavala | 3 hr |
| Oct 1, 1:49 AM CDT | Flash Flood Warning | EWX | Kinney, Maverick, Uvalde, Zavala | 4 hr |
| Oct 1, 1:57 AM CDT | Special Weather Statement | EWX | Zavala | 63 min |
| Oct 1, 2:16 AM CDT | Areal Flood Advisory | EWX | Gillespie, Llano | 3 hr |
| Oct 1, 2:57 AM CDT | Areal Flood Advisory | EWX | Burnet, Llano | 3 hr |
| Oct 1, 4:11 AM CDT | Areal Flood Advisory | EWX | Kinney, Maverick | 4 hr |
| Oct 1, 4:16 AM CDT | Areal Flood Advisory | EWX | Bexar | 3 hr |
| Oct 1, 4:26 AM CDT | Areal Flood Advisory | EWX | Hays, Travis, Williamson | 4 hr |
| Oct 1, 5:07 AM CDT | Areal Flood Advisory | EWX | Wilson | 3 hr |
| Oct 1, 6:37 AM CDT | Areal Flood Advisory | EWX | Bastrop | 3 hr |
| Oct 1, 6:46 AM CDT | Areal Flood Advisory | EWX | Bexar, Guadalupe | 3 hr |
| Oct 1, 6:37 PM CDT | Special Weather Statement | EWX | Terrell | 38 min |
Nearby
Flash Flood Warnings in Texas, 2021Every flash flood warning in 2021
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.