Flood Warning Issued for Karnes and Wilson Counties, Texas

Source: NOAA · Karnes and Wilson Counties, Texas

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The National Weather Service has issued a Flood Warning for Karnes and Wilson Counties in Texas, with minor flooding expected on Cibolo Creek from Tuesday morning to late Wednesday morning.

What this NWS weather alert tells you, and what most readers miss

This notice was issued by NOAA on April 28, 2026 and geographically references Karnes and Wilson Counties, Texas. Its severity classification of "high" signals how the issuing agency weighs the risk of harm if no action is taken - "critical" and "high" tier alerts typically carry direct consumer actions, while "medium" and "low" tend toward informational guidance or monitoring advisories. The category it belongs to - Weather Alerts - determines the warning protocol behind it, which shapes what protective action (seeking shelter, following evacuation orders if issued, monitoring official updates) is recommended and which agency holds authority to issue or cancel it.

Most readers skim a notice like this, check whether they are personally affected, and move on. The more useful lens is to read it as a data point about the issuing system: how quickly NOAA detected the hazard, how precise the geographic or product-identifier scope is, and whether similar notices have clustered in the same category or region in the last 90 days. Cluster patterns frequently precede a broader regulatory action, a single localized NWS weather alert is isolated; three of them within a quarter often indicate a supply-chain, infrastructure, or seasonal driver that will keep producing notices until something structural changes.

For decision-making, Areazine pairs each alert with the original agency URL, the full agency name, and a timestamp so you can verify the notice against the primary source before acting on it. Tags on this item (weather, alert, Flood Warning, Texas) map to related alerts in the same area of risk - browsing them together gives a clearer picture than any single notice alone, because the shape of an ongoing issue only becomes visible across multiple sequential alerts.

Alert Details

The National Weather Service (NWS) Austin/San Antonio TX has issued a Flood Warning. This alert is effective from April 20, 2026, at 8:24 PM CDT.

Affected Areas

The warning affects Karnes County, TX and Wilson County, TX, specifically Cibolo Creek at Sutherland Springs.

What You Should Do

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Additional information is available at www.weather.gov.

Expected Conditions

Minor flooding is forecast. At 7:15 PM CDT on April 20, 2026, the river stage was 6.8 feet. Flood stage is 21.0 feet, and the river is expected to rise to a crest of 24.5 feet.

Timeline

The onset is April 21, 2026, at 11:55 AM CDT. The alert expires on April 21, 2026, at 2:30 PM CDT and ends on April 22, 2026, at 10:26 AM CDT.

Original source: NOAA Official Notice ↗

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Frequently Asked Questions

Common questions about this NWS weather alert.

What is this NWS weather alert about?
The National Weather Service has issued a Flood Warning for Karnes and Wilson Counties in Texas, with minor flooding expected on Cibolo Creek from Tuesday morning to late Wednesday morning.
Which agency issued this alert?
This alert was issued by NOAA. The original notice is available at the source link at the bottom of this article.
How severe is this alert?
This alert is classified as "high" severity. Take precautions and monitor for updates.
What area is affected?
This alert affects Karnes and Wilson Counties, Texas. Check with NOAA for the most current geographic scope.
Where can I find more Weather Alerts updates?
Browse the full Weather Alerts feed on Areazine at areazine.com/weather/ for the latest updates from NOAA and other agencies.