Tornado Warning for McCook and Minnehaha Counties in South Dakota

Source: NOAA · Southeastern South Dakota

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NWS Sioux Falls has issued a Tornado Warning for southwestern Minnehaha County and southeastern McCook County until 7:45 PM CDT on May 31.

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

This notice was issued by NOAA on June 16, 2026 and geographically references Southeastern South Dakota. 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, Tornado Warning, South Dakota) 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

Tornado Warning issued by NWS Sioux Falls SD. Effective from 2026-05-31T19:06:00-05:00 until 2026-05-31T19:45:00-05:00. Severity: Extreme. Certainty: Observed. Urgency: Immediate.

Affected Areas

Southwestern Minnehaha County in southeastern South Dakota and southeastern McCook County in southeastern South Dakota. The storm was located over Lake Vermillion State Recreation Area, moving east at 15 mph, and will be near Lake Vermillion State Recreation Area and Humboldt around 710 PM CDT.

What You Should Do

TAKE COVER NOW! Move to a basement or an interior room on the lowest floor of a sturdy building. Avoid windows. If you are outdoors, in a mobile home, or in a vehicle, move to the closest substantial shelter and protect yourself from flying debris. To report severe weather contact your nearest law enforcement agency.

Expected Conditions

A severe thunderstorm capable of producing a tornado and quarter size hail. Radar indicated rotation. Flying debris will be dangerous. Mobile homes will be damaged or destroyed. Damage to roofs, windows, and vehicles will occur. Tree damage is likely.

Timeline

Alert effective May 31 at 7:06 PM CDT until May 31 at 7:45 PM 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?
NWS Sioux Falls has issued a Tornado Warning for southwestern Minnehaha County and southeastern McCook County until 7:45 PM CDT on May 31.
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 Southeastern South Dakota. 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.