Alert archive / Texas / Flash Flood Warnings in 2021
Flash Flood Warning 65, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Oct 15, 2021, 3:58 PM CDT for Bexar County, Texas. It was in force for 112 min. 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 15, 2021, 3:58 PM CDT (20:58 UTC)
- Expired
- Oct 15, 2021, 5:50 PM CDT
- In force
- 112 min
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
County Bexar County, TX
The radar
The Austin/San Antonio radar (KEWX), 63 km from the middle of the area, began a volume at 21:01 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 15, 4:25 PM CDT | FLASH FLOOD | 3 Sw Balcones Heights, TX | 5 NEW LOW WATER CROSSINGS CLOSED IN WESTERN BEXAR COUNTY AS 1.81 OF RAIN FELL IS JUST OVER AN HOUR ONTOP OF SATURATED GROUNDS. REPORTS OF URBAN STREET FLOODING AS WELL. |
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 12:00Z, 9.0 hours before the alert went out and 214 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
- 1893 J/kg
- Mixed-layer CIN
- -52 J/kg
- Mixed-layer LCL
- 663 m above ground
- 0-6 km bulk shear
- 20 kt
- 0-1 km storm-relative helicity
- 88 m²/s²
- 0-3 km storm-relative helicity
- 93 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 3.9
The text
As transmitted.
596
WGUS54 KEWX 152058
FFWEWX
TXC029-160000-
/O.NEW.KEWX.FF.W.0065.211015T2058Z-211016T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
358 PM CDT Fri Oct 15 2021
The National Weather Service in Austin/San Antonio has issued a
* Flash Flood Warning for...
West Central Bexar County in south central Texas...
* Until 700 PM CDT.
* At 358 PM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 3 inches of rain
have fallen. 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...
San Antonio, San Antonio Int Airport, Stinson Municipal Airport,
Leon Valley, Helotes, Alamo Heights, Terrell Hills, Olmos Park,
Sea World, Lackland AFB, Government Canyon State Natural Area,
Castle Hills, Balcones Heights and Brooks City Base.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 2959 9881 2960 9878 2958 9863 2952 9847
2948 9842 2940 9844 2933 9846 2936 9853
2940 9861 2941 9880 2951 9881
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
HAMPSHIRE2 follow-up statements
445
WGUS74 KEWX 152132
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
432 PM CDT Fri Oct 15 2021
TXC029-160000-
/O.CON.KEWX.FF.W.0065.000000T0000Z-211016T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bexar TX-
432 PM CDT Fri Oct 15 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING
FOR WEST CENTRAL BEXAR COUNTY...
At 432 PM CDT, Doppler radar and automated rain gauges indicated
thunderstorms produced heavy rain across the warned area. Between 1
and 3 inches of rain have fallen. The heavy rainfall has ended but
flash flooding is ongoing or expected to begin shortly as the rain
runs off.
HAZARD...Life threatening flash flooding. Thunderstorms producing
flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
Some locations that will experience flash flooding include...
San Antonio, San Antonio Int Airport, Stinson Municipal Airport,
Leon Valley, Helotes, Alamo Heights, Terrell Hills, Olmos Park,
Lackland AFB, Sea World, Castle Hills, Balcones Heights and Brooks
City Base.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 2956 9872 2958 9866 2958 9863 2952 9847
2948 9842 2940 9844 2933 9846 2936 9853
2940 9861 2941 9873
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
HAMPSHIRE224
WGUS74 KEWX 152250
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
550 PM CDT Fri Oct 15 2021
TXC029-152300-
/O.CAN.KEWX.FF.W.0065.000000T0000Z-211016T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Bexar TX-
550 PM CDT Fri Oct 15 2021
...FLASH FLOOD WARNING IS CANCELLED FOR WEST CENTRAL BEXAR COUNTY...
Flooding is no longer expected to pose a threat. Please continue to
heed remaining road closures.
LAT...LON 2956 9872 2958 9866 2958 9863 2952 9847
2948 9842 2940 9844 2933 9846 2936 9853
2940 9861 2941 9873
$$
HAMPSHIREThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 14, 8:35 PM CDT | River Flood Warning | EWX | Karnes, Wilson | 36 hr |
| Oct 14, 8:44 PM CDT | River Flood Warning | EWX | Goliad, Karnes | 3 days |
| Oct 15, 3:34 PM CDT | Special Weather Statement | EWX | Bexar | 41 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.