Alert archive / Texas / Areal Flood Advisories in 2021
Areal Flood Advisory 191, NWS Austin/San Antonio, TX
NWS Austin/San Antonio, TX issued this areal flood advisory at Jul 19, 2021, 6:31 PM CDT for Bexar County, Texas. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jul 19, 2021, 6:31 PM CDT (23:31 UTC)
- Expired
- Jul 19, 2021, 9:30 PM CDT
- In force
- 3 hr
- Issued by
- NWS Austin/San Antonio, TX
- Area
- Storm-based polygon
County Bexar County, TX
The radar
The Austin/San Antonio radar (KEWX), 55 km from the middle of the area, began a volume at 23:32 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.
The nearest sounding before it
Corpus Christi, TX (KCRP), launched 12:00Z, 11.5 hours before the alert went out and 223 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
- 1945 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 742 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- -39 m²/s²
- 0-3 km storm-relative helicity
- -7 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Austin/San Antonio, TX wrote its last area forecast discussion before this areal flood advisory went out at Jul 19, 6:25 PM CDT, 6 minutes earlier.
Area forecast discussion, Jul 19, 6:25 PM CDT, 6 minutes before
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</html>Hazardous weather outlook, Jul 19, 9:14 AM CDT, 9 hours 17 minutes before
Hazardous Weather Outlook...UPDATED National Weather Service Austin/San Antonio TX 914 AM CDT Mon Jul 19 2021 TXZ171>173-183>194-202>209-217>225-228-201415- Llano-Burnet-Williamson-Val Verde-Edwards-Real-Kerr-Bandera- Gillespie-Kendall-Blanco-Hays-Travis-Bastrop-Lee-Kinney-Uvalde- Medina-Bexar-Comal-Guadalupe-Caldwell-Fayette-Maverick-Zavala- Frio-Atascosa-Wilson-Karnes-Gonzales-De Witt-Lavaca-Dimmit- 914 AM CDT Mon Jul 19 2021 This Hazardous Weather Outlook is for South-Central Texas.. .DAY ONE...Today And Tonight. Locally heavy rainfall and isolated minor flash flooding may be possible from this afternoon into tonight with scattered to numerous showers and thunderstorms associated with a rare July front moving into and across the region. Some of these storms could be strong to marginally severe with thunderstorm damaging winds being the main threat. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Wet pattern continues with scattered to numerous showers and thunderstorms from Tuesday through Friday. In addition to cloud- to-ground lightning, locally heavy rainfall and minor flash flooding may be possible. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report any flooding to the National Weather Service.
In the hours before
Special weather statement, Jul 19, 2:54 PM CDT, 3 hours 37 minutes before
Special Weather Statement
National Weather Service Austin/San Antonio TX
254 PM CDT Mon Jul 19 2021
TXZ172-173-192045-
Williamson TX-Burnet TX-
254 PM CDT Mon Jul 19 2021
...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN WILLIAMSON AND EAST
CENTRAL BURNET COUNTIES UNTIL 345 PM CDT...
At 253 PM CDT, Doppler radar was tracking a strong thunderstorm near
Florence, or 13 miles northwest of Serenada, moving southeast at 20
mph.
Wind gusts up to 50 mph will be possible with this storm.
Locations impacted include...
Round Rock, Cedar Park, Georgetown, Granger, Serenada, Leander,
Bartlett, Liberty Hill, Jarrell, Florence, Weir, Georgetown Dam, Sun
City, Mahomet, Andice, Briggs, Theon, Walburg, Schwertner, and
Brushy Creek.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Austin San Antonio.
&&
LAT...LON 3091 9783 3087 9763 3077 9735 3053 9778
3083 9798 3095 9785
TIME...MOT...LOC 1953Z 310DEG 18KT 3085 9785
BFSpecial weather statement, Jul 19, 3:23 PM CDT, 3 hours 8 minutes before
Special Weather Statement National Weather Service Austin/San Antonio TX 323 PM CDT Mon Jul 19 2021 TXZ173-192-192115- Williamson TX-Travis TX- 323 PM CDT Mon Jul 19 2021 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN WILLIAMSON AND NORTH CENTRAL TRAVIS COUNTIES UNTIL 415 PM CDT... At 323 PM CDT, Doppler radar was tracking a strong thunderstorm over Leander, or near Cedar Park, moving southeast at 20 mph. Wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Austin, Round Rock, Cedar Park, Georgetown, Pflugerville, Anderson Mill, Windemere, Leander, Hutto, Liberty Hill, Jonestown, Brushy Creek, Wells Branch, and Jollyville. PRECAUTIONARY/PREPAREDNESS ACTIONS... This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. To report severe weather, contact your nearest law enforcement agency. They will relay your report to the National Weather Service office in Austin San Antonio. && LAT...LON 3057 9796 3069 9780 3049 9755 3033 9778 TIME...MOT...LOC 2023Z 321DEG 17KT 3058 9783 BF
Special weather statement, Jul 19, 4:56 PM CDT, 1 hour 35 minutes before
Special Weather Statement National Weather Service Austin/San Antonio TX 456 PM CDT Mon Jul 19 2021 TXZ191-207-208-192245- Guadalupe TX-Caldwell TX-Hays TX- 456 PM CDT Mon Jul 19 2021 ...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL CALDWELL... SOUTHEASTERN HAYS AND NORTH CENTRAL GUADALUPE COUNTIES UNTIL 545 PM CDT... At 456 PM CDT, Doppler radar was tracking a strong thunderstorm over San Marcos, moving southeast at 10 mph. Wind gusts up to 50 mph will be possible with this storm. Locations impacted include... San Marcos, Lockhart, Martindale, Staples, San Marcos Regional Airport, Maxwell, Reedville and Redwood. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. && LAT...LON 2988 9802 2995 9794 2988 9771 2971 9784 TIME...MOT...LOC 2156Z 306DEG 10KT 2990 9793 PLATT
Local storm report, Jul 19, 5:38 PM CDT, 53 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
538 PM CDT MON JUL 19 2021
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0437 PM LIGHTNING 2 S SAN LEANNA 30.12N 97.82W
07/19/2021 TRAVIS TX FIRE DEPT/RESCUE
HOUSE FIRE CAUSED BY LIGHTNING IN MANCHACA.
TIME ESTIMATED FROM RADAR.
&&
BFSpecial weather statement, Jul 19, 6:10 PM CDT, 21 minutes before
Special Weather Statement
National Weather Service Austin/San Antonio TX
610 PM CDT Mon Jul 19 2021
TXZ205-200000-
Bexar TX-
610 PM CDT Mon Jul 19 2021
...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL BEXAR COUNTY UNTIL 700 PM
CDT...
At 610 PM CDT, Doppler radar was tracking a strong thunderstorm over
San Antonio Int Airport, moving southeast at 20 mph.
Wind gusts up to 50 mph will be possible with this storm.
Locations impacted include...
San Antonio, Schertz, Universal City, Live Oak, Selma, San Antonio
Int Airport, Stinson Municipal Airport, Randolph AFB, Leon Valley,
Kirby, Alamo Heights, Windcrest, Terrell Hills, Shavano Park,
Hollywood Park, Olmos Park, St. Hedwig, China Grove, Converse and
Castle Hills.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 2919 9844 2955 9863 2967 9840 2958 9830
2956 9830 2955 9828 2946 9818
TIME...MOT...LOC 2310Z 312DEG 18KT 2953 9847
PLATTThe office that day
Everything else NWS Austin/San Antonio, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 19, 2:54 PM CDT | Special Weather Statement | EWX | Williamson | 51 min |
| Jul 19, 3:23 PM CDT | Special Weather Statement | EWX | Williamson | 52 min |
| Jul 19, 4:14 PM CDT | Areal Flood Advisory | EWX | Travis | 3 hr |
| Jul 19, 4:20 PM CDT | Areal Flood Advisory | EWX | Gillespie | 3 hr |
| Jul 19, 4:56 PM CDT | Special Weather Statement | EWX | Caldwell | 49 min |
| Jul 19, 5:25 PM CDT | Areal Flood Advisory | EWX | Kendall | 3 hr |
| Jul 19, 5:28 PM CDT | Areal Flood Advisory | EWX | Kerr | 3 hr |
| Jul 19, 5:38 PM CDT | Areal Flood Advisory | EWX | Comal | 3 hr |
| Jul 19, 6:10 PM CDT | Special Weather Statement | EWX | Bexar | 50 min |
Nearby
Areal Flood Advisories in Texas, 2021Every areal flood advisory 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.