Alert archive / Texas / Flood Watches in 2022

Flood Watch 4, NWS Austin/San Antonio, TX

August 31, 202210 counties in Texas

NWS Austin/San Antonio, TX issued this flood watch at Aug 31, 2022, 2:05 AM CDT for 10 counties in Texas. It was in force for 20 hr.

The area

The counties it named.

The facts

Issued
Aug 31, 2022, 2:05 AM CDT (07:05 UTC)
Expired
Aug 31, 2022, 9:44 PM CDT
In force
20 hr
Issued by
NWS Austin/San Antonio, TX
Flood severity
None

Counties Bandera County, TX, Dimmit County, TX, Edwards County, TX, Kerr County, TX, Kinney County, TX, Maverick County, TX, Real County, TX, Uvalde County, TX, Val Verde County, TX, Zavala County, TX

The radar

The Laughlin AFB radar (KDFX), 33 km from the middle of the area, began a volume at 07:07 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

Del Rio, TX (KDRT), launched 00:00Z, 7.1 hours before the alert went out and 83 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-pSkew-T log-p diagram, Del Rio, TX at 00:00Z on 2022-08-31Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 280 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Del Rio, TX at 00:00Z on 2022-08-31The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 6 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
280 J/kg
Mixed-layer CIN
-31 J/kg
Mixed-layer LCL
1159 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
6 m²/s²
0-3 km storm-relative helicity
-24 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flood watch 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 flood watch went out at Aug 31, 12:41 AM CDT, 1 hour 24 minutes earlier.

Area forecast discussion, Aug 31, 12:41 AM CDT, 1 hour 24 minutes before
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Hazardous weather outlook, Aug 30, 1:58 PM CDT, 12 hours 7 minutes before
Hazardous Weather Outlook
National Weather Service Austin/San Antonio TX
158 PM CDT Tue Aug 30 2022

TXZ171>173-183>194-202>209-217>225-228-311900-
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-
158 PM CDT Tue Aug 30 2022

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

.DAY ONE...Tonight.

Scattered to numerous showers and thunderstorms are expected
generally along and west of the I-35 corridor late this evening
and overnight tonight. Quick, heavy rainfall with isolated totals
over two inches could lead to flash flooding, especially across
the Rio Grande Plains.

.DAYS TWO THROUGH SEVEN...Wednesday through Monday.

Scattered to numerous showers and thunderstorms will be possible
Wednesday through Friday. A few spots could see heavy rain totals
over two inches, leading to isolated flooding potential. With
heavy rainfall from Tuesday, flash flooding may develop quickly
over already saturated soils.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 30, 7:59 PM CDTAreal Flood AdvisoryEWXMedina, Uvalde2 hr
Aug 30, 8:37 PM CDTAreal Flood AdvisoryEWXBandera, Kerr, Real83 min
Aug 31, 4:24 AM CDTAreal Flood AdvisoryEWXDimmit, Maverick3 hr
Aug 31, 4:52 AM CDTAreal Flood AdvisoryEWXDimmit, Maverick, Zavala3 hr
Aug 31, 5:27 AM CDTAreal Flood AdvisoryEWXMaverick3 hr
Aug 31, 6:08 AM CDTAreal Flood AdvisoryEWXBandera, Real3 hr
Aug 31, 6:36 AM CDTFlash Flood Warning Considerable damage threatEWXBandera, Real4 hr
Aug 31, 7:55 AM CDTAreal Flood AdvisoryEWXUvalde3 hr
Aug 31, 7:58 AM CDTAreal Flood AdvisoryEWXVal Verde3 hr
Aug 31, 8:39 AM CDTAreal Flood AdvisoryEWXReal3 hr
Aug 31, 9:00 AM CDTFlash Flood Warning Considerable damage threatEWXEdwards, Real, Uvalde3 hr
Aug 31, 9:33 AM CDTFlash Flood Warning Considerable damage threatEWXVal Verde3 hr
Aug 31, 9:51 AM CDTRiver Flood WarningEWXVal Verde10 hr
Aug 31, 10:57 AM CDTRiver Flood WarningEWXVal Verde9 hr
Aug 31, 6:11 PM CDTAreal Flood AdvisoryEWXEdwards, Real3 hr
Aug 31, 6:35 PM CDTAreal Flood AdvisoryEWXBandera115 min
Aug 31, 6:43 PM CDTSpecial Weather StatementEWXComal47 min

Nearby

Flood Watches in Texas, 2022Every flood watch in 2022

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.