Alert archive / Texas / Areal Flood Advisories in 2021

Areal Flood Advisory 287, NWS Austin/San Antonio, TX

October 14, 20214 counties in Texas

NWS Austin/San Antonio, TX issued this areal flood advisory at Oct 14, 2021, 1:11 AM CDT for 4 counties in Texas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Oct 14, 2021, 1:11 AM CDT (06:11 UTC)
Expired: Oct 14, 2021, 4:15 AM CDT
In force: 3 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon

Counties Caldwell County, TX, Gonzales County, TX, Guadalupe County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 32 km from the middle of the area, began a volume at 06:15 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, 6.2 hours before the alert went out and 203 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1651 J/kg
Mixed-layer CIN: -85 J/kg
Mixed-layer LCL: 867 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 97 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.7
Supercell composite: 7.0

Open this sounding in Storm Lab

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 Oct 14, 12:35 AM CDT, 36 minutes earlier.

Area forecast discussion, Oct 14, 12:35 AM CDT, 36 minutes before

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Hazardous weather outlook, Oct 13, 3:37 AM CDT, 21 hours 34 minutes before

Hazardous Weather Outlook
National Weather Service Austin/San Antonio TX
337 AM CDT Wed Oct 13 2021

TXZ171>173-183>194-202>209-217>225-228-140845-
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-
337 AM CDT Wed Oct 13 2021

This Hazardous Weather Outlook is for South-Central Texas..

.DAY ONE...Today And Tonight.

Scattered showers and thunderstorms will continue Wednesday.
The main event is currently forecast to arrive Wednesday evening
and continue into Thursday morning. There is a moderate risk for
excessive rainfall leading to flash flooding during this time
along and west of the I-35 corridor. An axis of 3-5 inches of
rainfall is currently forecast across the Hill Country and
southern Edwards Plateau, with isolated higher amounts up to 7
inches. 1-4 inches of rainfall is forecast along the Rio Grande
and I-35 corridor. A Flash Flood Watch is in effect roughly along
and west of the I-35 corridor. Rainfall amounts of less than 1
inch is forecast east of the watch area.

In addition, there is a very low but nonzero risk for a tornado or
perhaps some damaging winds late Wednesday afternoon through
Wednesday night, mainly over the western half of our region.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Scattered showers and thunderstorms will continue into Thursday
morning with the possibility of heavy rainfall leading to Flash
Flooding. Activity will be impacting areas of the I-35 corridor
and points eastward through the morning hours. Rainfall should end
west to east across the area by the afternoon hours Thursday.

.SPOTTER INFORMATION STATEMENT...

Spotters are encouraged to submit rainfall totals.

In the hours before

Local storm report, Oct 13, 11:52 PM CDT, 1 hour 19 minutes before

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Local storm report, Oct 13, 11:59 PM CDT, 1 hour 12 minutes before

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Local storm report, Oct 14, 12:06 AM CDT, 1 hour 5 minutes before

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Local storm report, Oct 14, 12:10 AM CDT, 1 hour 1 minute before

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Local storm report, Oct 14, 12:28 AM CDT, 43 minutes before

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Local storm report, Oct 14, 1:10 AM CDT, 1 minute before

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The office that day

Everything else NWS Austin/San Antonio, TX issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Oct 13, 7:44 PM CDT	Special Weather Statement	EWX	Kendall	46 min
Oct 13, 7:53 PM CDT	Areal Flood Advisory	EWX	Bandera, Kendall, Kerr	3 hr
Oct 13, 8:05 PM CDT	Tornado Warning	EWX	Blanco, Comal, Kendall	25 min
Oct 13, 8:21 PM CDT	Special Weather Statement	EWX	Williamson	39 min
Oct 13, 8:28 PM CDT	Special Weather Statement	EWX	Comal, Hays	47 min
Oct 13, 8:35 PM CDT	Areal Flood Advisory	EWX	Blanco	3 hr
Oct 13, 8:55 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Blanco, Kendall	6 hr
Oct 13, 9:25 PM CDT	Areal Flood Advisory	EWX	Bexar, Comal, Hays	3 hr
Oct 13, 9:49 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Bexar, Comal	3 hr
Oct 13, 9:55 PM CDT	Areal Flood Advisory	EWX	Travis	3 hr
Oct 13, 10:24 PM CDT	Areal Flood Advisory	EWX	Williamson	3 hr
Oct 13, 10:38 PM CDT	Areal Flood Advisory	EWX	Hays, Travis	3 hr
Oct 13, 10:52 PM CDT	River Flood Warning	EWX	Blanco, Hays	3 hr
Oct 13, 11:00 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Hays	6 hr
Oct 13, 11:49 PM CDT	Areal Flood Advisory	EWX	Bastrop, Travis, Williamson	4 hr
Oct 13, 11:59 PM CDT	Areal Flood Advisory	EWX	Bexar, Caldwell, Comal, Guadalupe	4 hr
Oct 14, 12:46 AM CDT	Flash Flood Warning Considerable damage threat	EWX	Caldwell, Comal, Guadalupe, Hays	10 hr
Oct 14, 12:57 AM CDT	River Flood Warning	EWX	Hays	4 hr
Oct 14, 1:04 AM CDT	Flash Flood Warning	EWX	Bexar, Comal	4 hr
Oct 14, 1:50 AM CDT	River Flood Warning	EWX	Comal, Guadalupe	7 hr
Oct 14, 2:04 AM CDT	Special Weather Statement	EWX	Gonzales	41 min
Oct 14, 2:39 AM CDT	Special Weather Statement	EWX	Gonzales	51 min
Oct 14, 2:48 AM CDT	Tornado Warning	EWX	Gonzales, Lavaca	27 min
Oct 14, 3:11 AM CDT	River Flood Warning	EWX	Comal, Guadalupe	4 hr
Oct 14, 3:17 AM CDT	Areal Flood Advisory	EWX	Bastrop, Fayette, Lee	3 hr
Oct 14, 3:19 AM CDT	Tornado Warning	EWX	Gonzales, Lavaca	26 min
Oct 14, 3:39 AM CDT	Tornado Warning	EWX	Fayette, Gonzales, Lavaca	36 min
Oct 14, 3:42 AM CDT	Flash Flood Warning Considerable damage threat	EWX	Caldwell, Gonzales, Guadalupe, Karnes, Lavaca, Wilson	7 hr
Oct 14, 4:13 AM CDT	River Flood Warning	EWX	Comal, Gonzales, Guadalupe	3 hr
Oct 14, 4:24 AM CDT	Severe Thunderstorm Warning	EWX	Fayette, Gonzales, Lavaca	66 min
Oct 14, 5:07 AM CDT	Flash Flood Warning Considerable damage threat	EWX	Fayette	5 hr
Oct 14, 5:10 AM CDT	Severe Thunderstorm Warning	EWX	Lavaca	21 min
Oct 14, 5:36 AM CDT	River Flood Warning	EWX	Caldwell, Hays	8 hr
Oct 14, 5:36 AM CDT	River Flood Warning	EWX	Caldwell, Gonzales	38 hr
Oct 14, 6:27 AM CDT	Flash Flood Warning Considerable damage threat	EWX	DeWitt, Karnes, Lavaca	6 hr
Oct 14, 7:15 AM CDT	River Flood Warning	EWX	Travis	6 hr
Oct 14, 7:19 AM CDT	River Flood Warning	EWX	Gonzales	3 days
Oct 14, 7:52 AM CDT	River Flood Warning	EWX	Guadalupe	3 hr
Oct 14, 8:23 AM CDT	River Flood Warning	EWX	Bexar	7 hr
Oct 14, 8:28 AM CDT	River Flood Warning	EWX	Bexar	21 hr
Oct 14, 8:28 AM CDT	River Flood Warning	EWX	Bexar, Wilson	29 hr
Oct 14, 8:29 AM CDT	River Flood Warning	EWX	Bexar	12 hr
Oct 14, 9:10 AM CDT	River Flood Warning	EWX	DeWitt	3 days
Oct 14, 9:11 AM CDT	River Flood Warning	EWX	DeWitt	5 days
Oct 14, 10:54 AM CDT	River Flood Warning	EWX	Karnes, Wilson	33 hr
Oct 14, 10:55 AM CDT	River Flood Warning	EWX	Karnes	45 hr

Nearby

Areal Flood Advisories in Texas, 2021 Every 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.