Alert archive / Texas / Flash Flood Warnings in 2021
Flash Flood Warning 37, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this flash flood warning at Jul 6, 2021, 6:39 AM CDT for Bexar County, Texas. It was in force for 5 hr. 4 reports 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
- Jul 6, 2021, 6:39 AM CDT (11:39 UTC)
- Expired
- Jul 6, 2021, 12:00 PM CDT
- In force
- 5 hr
- 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 11:40 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 |
|---|---|---|---|
| Jul 6, 6:57 AM CDT | FLASH FLOOD | 3 S Helotes, TX | LOW WATER CROSSING ON LESLIE RD REPORTED CLOSED VIA BEXARFLOOD.ORG. |
| Jul 6, 7:09 AM CDT | FLASH FLOOD | 1 Ese Balcones Heights, TX | MPING REPORT OF STREET FLOODING. REPORTS IS NEAR I-10 AND VANCE JACKSON RD. |
| Jul 6, 7:50 AM CDT | FLASH FLOOD | 1 Wsw Cross Mountain, TX | BEXAR COUNTY RAINFALL WEBSITE SHOWS WATER OVER THE ROADS AT TOUTANT BEAUREGARD NEAR WILD SAGE AND CIELO VISTA DRIVE SOUTH OF VISTA MOUNTAIN. IMPRESSIVE RAINFALL RATES OF OVER 2.5 INCHES IN AN HOUR STILL ONGOING. |
| Jul 6, 8:37 AM CDT | FLASH FLOOD | 1 Ene Cross Mountain, TX | WATER CROSSING FLOODED AT CIELO VISTA DRIVE SOUTH OF VISTA MONTAN DRIVE. |
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, 11.7 hours before the alert went out and 212 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
- 322 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 665 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -92 m²/s²
- 0-3 km storm-relative helicity
- -68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
799
WGUS54 KEWX 061139
FFWEWX
TXC029-061430-
/O.NEW.KEWX.FF.W.0037.210706T1139Z-210706T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
639 AM CDT Tue Jul 6 2021
The National Weather Service in Austin/San Antonio has issued a
* Flash Flood Warning for...
Northwestern Bexar County in south central Texas...
* Until 930 AM CDT.
* At 639 AM CDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 3 inches of rain
have fallen. Additional rainfall amounts of 1 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...
San Antonio, Leon Valley, Helotes, Fair Oaks Ranch, Shavano Park,
Cross Mountain, Sea World, Government Canyon State Natural Area,
Lackland AFB, The Dominion, Leon Springs, Castle Hills, Balcones
Heights, Grey Forest, Fiesta Texas, San Geronimo, Macdona and
Scenic Oaks.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 2972 9878 2972 9876 2972 9874 2972 9873
2973 9873 2973 9872 2974 9870 2974 9866
2975 9866 2975 9865 2974 9864 2974 9862
2974 9861 2974 9860 2975 9860 2975 9859
2927 9847 2934 9880 2969 9881
FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...2 INCHES IN 1 HOUR
$$
RUNYEN2 follow-up statements
153
WGUS54 KEWX 061319
FFWEWX
TXC029-061530-
/O.EXT.KEWX.FF.W.0037.000000T0000Z-210706T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
819 AM CDT Tue Jul 6 2021
The National Weather Service in Austin/San Antonio has extended the
* Flash Flood Warning for...
Northwestern Bexar County in south central Texas...
* Until 1030 AM CDT.
* At 819 AM CDT, Doppler radar and automated rain gauges indicated
thunderstorms producing heavy rain across the warned area. Between
2 and 5 inches of rain have fallen. The expected rainfall rate is
1 to 2 inches in 1 hour. Additional rainfall amounts of 1 to 2
inches are possible in the warned area. Flash flooding is ongoing.
HAZARD...Life threatening flash flooding. Thunderstorms
producing flash flooding.
SOURCE...Radar and automated gauges.
IMPACT...Life threatening flash flooding of creeks and streams,
urban areas, highways, streets and underpasses.
* Some locations that will experience flash flooding include...
San Antonio, Leon Valley, Helotes, Fair Oaks Ranch, Shavano Park,
Cross Mountain, Sea World, Government Canyon State Natural Area,
Lackland AFB, The Dominion, Leon Springs, Castle Hills, Balcones
Heights, Grey Forest, Fiesta Texas, San Geronimo, Macdona and
Scenic Oaks.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 2972 9878 2972 9876 2972 9874 2972 9873
2973 9873 2973 9872 2974 9870 2974 9866
2975 9866 2975 9865 2974 9864 2974 9862
2974 9861 2974 9860 2975 9860 2975 9859
2927 9847 2934 9880 2969 9881
FLASH FLOOD...RADAR AND GAUGE INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE
EXPECTED RAINFALL...1-2 INCHES IN 1 HOUR
$$
KCW289
WGUS54 KEWX 061448
FFWEWX
TXC029-061700-
/O.EXT.KEWX.FF.W.0037.000000T0000Z-210706T1700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Austin/San Antonio TX
948 AM CDT Tue Jul 6 2021
The National Weather Service in Austin/San Antonio has extended the
* Flash Flood Warning for...
Northwestern Bexar County in south central Texas...
* Until noon CDT.
* At 948 AM CDT, Doppler radar and automated rain gauges indicated
heavy rain falling across the warned area. Between 2 and 6 inches
of rain have fallen. The expected rainfall rate is 0.25 to 1 inch
in 1 hour. Additional rainfall amounts up to 1 inch are possible
in the warned area. Flash flooding is ongoing.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Radar and automated gauges.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
San Antonio, Leon Valley, Helotes, Fair Oaks Ranch, Shavano Park,
Cross Mountain, Sea World, Government Canyon State Natural Area,
Lackland AFB, The Dominion, Leon Springs, Castle Hills, Balcones
Heights, Grey Forest, Fiesta Texas, San Geronimo, Macdona and
Scenic Oaks.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 2972 9878 2972 9876 2972 9874 2972 9873
2973 9873 2973 9872 2974 9870 2974 9866
2975 9866 2975 9865 2974 9864 2974 9862
2974 9861 2974 9860 2975 9860 2975 9859
2927 9847 2934 9880 2969 9881
FLASH FLOOD...RADAR AND GAUGE INDICATED
EXPECTED RAINFALL...0.25-1 INCH IN 1 HOUR
$$
KCWThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 7:01 PM CDT | Areal Flood Advisory | EWX | Bandera, Kerr | 3 hr |
| Jul 6, 4:43 AM CDT | Areal Flood Advisory | EWX | Blanco, Comal, Kendall | 3 hr |
| Jul 6, 6:06 AM CDT | Areal Flood Advisory | EWX | Bexar, Medina | 3 hr |
| Jul 6, 6:47 AM CDT | Areal Flood Advisory | EWX | Atascosa | 3 hr |
| Jul 6, 10:15 AM CDT | River Flood Warning | EWX | Bexar | 22 hr |
| Jul 6, 10:34 AM CDT | Areal Flood Advisory | EWX | Gillespie | 3 hr |
| Jul 6, 2:47 PM CDT | River Flood Warning | EWX | Bexar | 20 hr |
| Jul 6, 4:56 PM CDT | River Flood Warning | EWX | Karnes, Wilson | 62 hr |
| Jul 6, 4:57 PM CDT | River Flood Warning | EWX | Bexar, Wilson | 42 hr |
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.