Alert archive / Texas / River Flood Warnings in 2026

River Flood Warning 1, NWS Austin/San Antonio, TX

April 20, 2026Karnes County, Wilson County, Texas

NWS Austin/San Antonio, TX issued this river flood warning at Apr 20, 2026, 8:24 PM CDT for Karnes County, Wilson County, Texas. It took effect at Apr 21, 2026, 11:55 AM CDT. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued: Apr 20, 2026, 8:24 PM CDT (01:24 UTC)
In effect from: Apr 21, 2026, 11:55 AM CDT
Expired: Apr 21, 2026, 2:14 PM CDT
In force: 2 hr
Issued by: NWS Austin/San Antonio, TX
Area: Storm-based polygon
Flood severity: Minor

Counties Karnes County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 74 km from the middle of the area, began a volume at 01:24 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 river

Written for the forecast point Cibolo Creek at Sutherland Springs (SUPT2). The gauge peaked at 18.81 ft at Apr 21, 2026, 5:00 PM CDT.

Action stage: 17 ft
Minor stage: 21 ft
Moderate stage: 27 ft
Major stage: 35 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 08185500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood warning 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 river flood warning went out at Apr 20, 5:59 PM CDT, 2 hours 25 minutes earlier.

Area forecast discussion, Apr 20, 5:59 PM CDT, 2 hours 25 minutes before

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In the hours before

Special weather statement, Apr 20, 5:02 PM CDT, 3 hours 22 minutes before

Special Weather Statement
National Weather Service Austin/San Antonio TX
502 PM CDT Mon Apr 20 2026

TXZ217-218-228-202245-
Maverick TX-Dimmit TX-Zavala TX-
502 PM CDT Mon Apr 20 2026

...A strong thunderstorm will impact portions of east central
Maverick, northwestern Dimmit and southwestern Zavala Counties
through 545 PM CDT...

At 502 PM CDT, Doppler radar was tracking a strong thunderstorm near
El Indio, moving east at 30 mph.

HAZARD...Winds in excess of 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
El Indio, Rosita, and Farias Lake.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

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 2851 10038 2854 10041 2855 10041 2858 10040
      2860 10043 2863 10044 2878 10008 2852 10001
      2850 10033
TIME...MOT...LOC 2202Z 256DEG 24KT 2857 10033

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

17

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 20, 8:58 PM CDT	Areal Flood Advisory	EWX	Bexar	2 hr
Apr 20, 9:17 PM CDT	Special Weather Statement	EWX	Zavala	43 min
Apr 20, 10:46 PM CDT	Areal Flood Advisory	EWX	Bexar, Comal, Guadalupe	2 hr
Apr 21, 4:32 AM CDT	River Flood Warning	EWX	Bexar	10 hr
Apr 21, 6:13 AM CDT	Areal Flood Advisory	EWX	Burnet, Travis, Williamson	15 hr
Apr 21, 7:06 AM CDT	Flash Flood Warning Considerable damage threat	EWX	Williamson	11 hr
Apr 21, 8:40 AM CDT	Areal Flood Advisory	EWX	Bexar, Comal, Guadalupe	3 hr
Apr 21, 10:59 AM CDT	Areal Flood Advisory	EWX	Lee	4 hr

Nearby

River Flood Warnings in Texas, 2026 Every river flood warning 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; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.