Flood Warning Issued for Calhoun and Richland Counties, SC

Source: NOAA · Calhoun and Richland Counties, South Carolina

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NWS Columbia SC has issued a Flood Warning for the Congaree River near Gadsden affecting Calhoun and Richland Counties from this evening through tomorrow evening.

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

This notice was issued by NOAA on June 13, 2026 and geographically references Calhoun and Richland Counties, South Carolina. 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 regulatory framework behind it, which shapes what remedies (refunds, replacements, recalls, evacuations) are available to affected individuals and who holds statutory responsibility for enforcement.

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, South Carolina) 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

A Flood Warning has been issued by the National Weather Service in Columbia SC. The alert was sent at 1:50 PM EDT on May 28, 2026, and is effective immediately.

Affected Areas

The warning covers Calhoun County, SC and Richland County, SC, specifically the Congaree River at Congaree NP Near Gadsden.

What You Should Do

Residents and those with interests near the river should monitor rising water levels and take action if necessary.

Expected Conditions

Minor flooding is forecast. At 15.0 feet, flooding begins in the Congaree National Park, affecting portions of the lower boardwalk. At 17.0 feet, the access road to the Sandy Run subdivision becomes flooded and the lower boardwalk becomes flooded by Cedar Creek. The river stage was 14.1 feet at 1:00 PM EDT Thursday, with bankfull stage at 14.0 feet and flood stage at 15.0 feet.

Timeline

The warning is in effect from this evening (onset at 8:00 PM EDT May 28) to tomorrow evening (ending at 8:00 PM EDT May 29). The river is expected to rise to a crest of 15.0 feet this evening, then fluctuate around 15 feet through much of Friday before beginning to fall.

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?
NWS Columbia SC has issued a Flood Warning for the Congaree River near Gadsden affecting Calhoun and Richland Counties from this evening through tomorrow evening.
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 Calhoun and Richland Counties, South Carolina. 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.