Alert archive / Texas / Flash Flood Warnings in 2021
Flash Flood Warning 20, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at May 19, 2021, 2:39 AM CDT for 8 counties in Texas. It was in force for 3 hr. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- May 19, 2021, 2:39 AM CDT (07:39 UTC)
- Expired
- May 19, 2021, 5:45 AM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
- Damage threat
- Considerable
- Flood severity
- None
Counties Caldwell County, TX, DeWitt County, TX, Fayette County, TX, Gonzales County, TX, Guadalupe County, TX, Karnes County, TX, Lavaca County, TX, Wilson County, TX
The radar
The Austin/San Antonio radar (KEWX), 84 km from the middle of the area, began a volume at 07:42 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
Corpus Christi, TX (KCRP), launched 00:00Z, 7.7 hours before the alert went out and 185 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
- 2386 J/kg
- Mixed-layer CIN
- -17 J/kg
- Mixed-layer LCL
- 721 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 59 m²/s²
- 0-3 km storm-relative helicity
- 114 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 6.4
The text
As transmitted.
542
WGUS54 KEWX 190739
FFWEWX
TXC055-123-149-177-187-255-285-493-191045-
/O.NEW.KEWX.FF.W.0020.210519T0739Z-210519T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
239 AM CDT Wed May 19 2021
The National Weather Service in Austin/San Antonio has issued a
* Flash Flood Warning for...
Southeastern Caldwell County in south central Texas...
DeWitt County in south central Texas...
Fayette County in south central Texas...
Gonzales County in south central Texas...
Southeastern Guadalupe County in south central Texas...
Northeastern Karnes County in south central Texas...
Lavaca County in south central Texas...
Northeastern Wilson County in south central Texas...
* Until 545 AM CDT.
* At 239 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 3 and 7 inches of rain
have fallen over the past 12 hours across this area. Additional
rainfall amounts of 1 to 3 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...
Cuero, Gonzales, Yoakum, La Grange, Schulenburg, Hallettsville,
Yorktown, Shiner, Stockdale, Flatonia, Moulton, Nixon, Waelder,
Smiley, Nordheim, Fayetteville, Hochheim, Cheapside, Westhoff and
Palmeto State Park.
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.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 2980 9734 2979 9732 3004 9702 3009 9690
2991 9662 2963 9687 2934 9656 2906 9694
2910 9698 2886 9731 2893 9742 2882 9756
2883 9764 2905 9783 2925 9821
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
BRADY2 follow-up statements
214
WGUS74 KEWX 190958
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
458 AM CDT Wed May 19 2021
TXC055-123-149-177-187-255-285-493-191045-
/O.CON.KEWX.FF.W.0020.000000T0000Z-210519T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Caldwell TX-DeWitt TX-Fayette TX-Gonzales TX-Guadalupe TX-Karnes TX-
Lavaca TX-Wilson TX-
458 AM CDT Wed May 19 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 AM CDT EARLY THIS
MORNING FOR SOUTHEASTERN CALDWELL, DEWITT, FAYETTE, GONZALES,
SOUTHEASTERN GUADALUPE, NORTHEASTERN KARNES, LAVACA AND NORTHEASTERN
WILSON COUNTIES...
At 458 AM CDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 3 and 7 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...
Cuero, Gonzales, Yoakum, La Grange, Schulenburg, Hallettsville,
Yorktown, Shiner, Stockdale, Flatonia, Moulton, Nixon, Waelder,
Smiley, Nordheim, Fayetteville, Hochheim, Cheapside, Westhoff, and
Palmeto State Park.
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.
Stay away or be swept away. River banks and culverts can become
unstable and unsafe.
&&
LAT...LON 2980 9734 2979 9732 3004 9702 3009 9690
2991 9662 2963 9687 2934 9656 2906 9694
2910 9698 2886 9731 2893 9742 2882 9756
2883 9764 2905 9783 2925 9821
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
$$
BF902
WGUS74 KEWX 191045
FFSEWX
Flash Flood Statement
National Weather Service Austin/San Antonio TX
545 AM CDT Wed May 19 2021
TXC055-123-149-177-187-255-285-493-191055-
/O.EXP.KEWX.FF.W.0020.000000T0000Z-210519T1045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Caldwell TX-DeWitt TX-Fayette TX-Gonzales TX-Guadalupe TX-Karnes TX-
Lavaca TX-Wilson TX-
545 AM CDT Wed May 19 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 545 AM CDT EARLY THIS MORNING
FOR SOUTHEASTERN CALDWELL, DEWITT, FAYETTE, GONZALES, SOUTHEASTERN
GUADALUPE, NORTHEASTERN KARNES, LAVACA AND NORTHEASTERN WILSON
COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
A Flash Flood Watch remains in effect until 100 PM CDT Thursday for
a portion of south central Texas.
LAT...LON 2980 9734 2979 9732 3004 9702 3009 9690
2991 9662 2963 9687 2934 9656 2906 9694
2910 9698 2886 9731 2893 9742 2882 9756
2883 9764 2905 9783 2925 9821
$$
BFThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 18, 7:13 PM CDT | Tornado Warning | EWX | Fayette | 32 min |
| May 18, 7:25 PM CDT | Tornado Warning | EWX | Lavaca | 20 min |
| May 18, 7:42 PM CDT | Special Weather Statement | EWX | Lavaca | 48 min |
| May 18, 7:53 PM CDT | Flash Flood Warning | EWX | Fayette, Lavaca | 4 hr |
| May 18, 8:23 PM CDT | Flash Flood Warning | EWX | DeWitt, Gonzales, Lavaca | 4 hr |
| May 19, 1:00 AM CDT | Special Weather Statement | EWX | Maverick | 45 min |
| May 19, 1:15 AM CDT | Special Weather Statement | EWX | Atascosa | 45 min |
| May 19, 1:56 AM CDT | Areal Flood Advisory | EWX | Atascosa, Karnes, Wilson | 2 hr |
| May 19, 2:00 AM CDT | Special Weather Statement | EWX | DeWitt, Karnes, Wilson | 45 min |
| May 19, 2:48 AM CDT | Special Weather Statement | EWX | Gonzales, Lavaca | 42 min |
| May 19, 3:34 AM CDT | Special Weather Statement | EWX | Fayette | 41 min |
| May 19, 4:29 AM CDT | Special Weather Statement | EWX | Lee | 16 min |
| May 19, 5:49 AM CDT | Special Weather Statement | EWX | Atascosa | 41 min |
| May 19, 6:08 AM CDT | Special Weather Statement | EWX | Karnes | 52 min |
| May 19, 6:33 AM CDT | Flash Flood Warning | EWX | Atascosa, Frio | 3 hr |
| May 19, 6:41 AM CDT | Special Weather Statement | EWX | Dimmit | 49 min |
| May 19, 7:58 AM CDT | Flash Flood Warning | EWX | Atascosa, Karnes, Wilson | 3 hr |
| May 19, 9:31 AM CDT | Special Weather Statement | EWX | Atascosa | 59 min |
| May 19, 1:29 PM CDT | Areal Flood Advisory | EWX | Edwards | 3 hr |
| May 19, 1:39 PM CDT | Areal Flood Advisory | EWX | Edwards, Val Verde | 2 hr |
| May 19, 2:11 PM CDT | Special Weather Statement | EWX | Edwards | 49 min |
| May 19, 2:34 PM CDT | Special Weather Statement | EWX | Kinney | 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.