Alert archive / Texas / Flood Watches in 2026

Flood Watch 3, NWS Austin/San Antonio, TX

May 21, 202625 counties in Texas

NWS Austin/San Antonio, TX issued this flood watch at May 21, 2026, 12:14 PM CDT for 25 counties in Texas. It took effect at May 22, 2026, 7:00 PM CDT. It was in force for 25 hr.

The area

The counties it named.

The facts

Issued: May 21, 2026, 12:14 PM CDT (17:14 UTC)
In effect from: May 22, 2026, 7:00 PM CDT
Expired: May 23, 2026, 7:37 PM CDT
In force: 25 hr
Issued by: NWS Austin/San Antonio, TX
Flood severity: None

All 25 counties

Atascosa County, TX, Bandera County, TX, Bastrop County, TX, Bexar County, TX, Blanco County, TX, Burnet County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Fayette County, TX, Frio County, TX, Gillespie County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Kendall County, TX, Kerr County, TX, Lavaca County, TX, Lee County, TX, Llano County, TX, Medina County, TX, Travis County, TX, Williamson County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 14 km from the middle of the area, began a volume at 17:14 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 12:00Z, 5.2 hours before the alert went out and 267 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: 1394 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 735 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 38 m²/s²
0-3 km storm-relative helicity: 85 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 3.4

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 May 21, 6:48 AM CDT, 5 hours 26 minutes earlier.

Area forecast discussion, May 21, 6:48 AM CDT, 5 hours 26 minutes 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
May 21, 12:04 AM CDT	Special Weather Statement	EWX	Llano	41 min
May 21, 5:07 AM CDT	Special Weather Statement	EWX	Real	38 min
May 21, 5:18 AM CDT	Severe Thunderstorm Warning	EWX	Real	21 min
May 21, 5:24 AM CDT	Areal Flood Advisory	EWX	Edwards, Real, Uvalde	2 hr
May 21, 6:07 AM CDT	Areal Flood Advisory	EWX	Medina, Uvalde	113 min
May 21, 2:54 PM CDT	Severe Thunderstorm Warning	EWX	Val Verde	36 min
May 21, 3:40 PM CDT	Areal Flood Advisory	EWX	Burnet	3 hr
May 21, 4:10 PM CDT	Special Weather Statement	EWX	Gillespie	50 min
May 21, 4:38 PM CDT	Severe Thunderstorm Warning	EWX	Gillespie, Llano	52 min
May 21, 4:57 PM CDT	Areal Flood Advisory	EWX	Blanco, Gillespie, Llano	3 hr
May 21, 5:05 PM CDT	Special Weather Statement	EWX	Burnet	40 min
May 21, 5:18 PM CDT	Areal Flood Advisory	EWX	Burnet	3 hr
May 21, 5:25 PM CDT	Special Weather Statement	EWX	Blanco	50 min
May 21, 5:37 PM CDT	Flash Flood Warning Considerable damage threat	EWX	Blanco, Burnet, Llano	4 hr
May 21, 5:44 PM CDT	River Flood Warning	EWX	Llano	4 hr
May 21, 5:59 PM CDT	Areal Flood Advisory	EWX	Williamson	3 hr
May 21, 6:10 PM CDT	Severe Thunderstorm Warning	EWX	Williamson	35 min
May 21, 6:19 PM CDT	Special Weather Statement	EWX	Edwards	56 min
May 21, 6:43 PM CDT	Special Weather Statement	EWX	Hays	47 min
May 21, 6:55 PM CDT	Severe Thunderstorm Warning	EWX	Edwards, Kerr, Real	50 min

Nearby

Flood Watches in Texas, 2026 Every flood watch in 2026

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.