Right now
The most recent data we hold from NOAA arrived 66 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 24 May 2026 at 23:30 UTC. It is kept here as a record.
No stronger detection stands among the 17 recorded within 20 km of this point since 15 March 2026 — 5 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 24 at 6:17PM CDT until May 24 at 6:30PM CDT by NWS Sioux Falls SD
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 22 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 22 / 100 |
| Legacy data-support index | 0.64/1 |
| Coordinates | 44.1010, -95.6121 |
| Nearest City | Brookings (97 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Date | 2026-05-24 — time not reported by the source |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.d37d10cee96dc793478531ddcc846f63 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-05-24 — time not reported.
First archived: 2026-05-24T23:17:50.593Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Murray, MN; Bon Homme, SD; Hutchinson, SD; McLeod, MN and 1 more areas |
| Headline | Severe Thunderstorm Warning issued May 24 at 6:17PM CDT until May 24 at 6:30PM CDT by NWS Sioux Falls SD |
| Expires | 2026-05-24T18:30:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d37d10cee96dc793478531ddcc846f63a08f137e.002.1","noaa_urn:oid:2.49.0.1.840.0.490af6761c1e46a5793c2ce98f02510dd965a15b.001.1","noaa_urn:oid:2.49.0.1.840.0.07919a615d38f2f058590ff2e16e7208ea3c2153.002.1","noaa_urn:oid:2.49.0.1.840.0.93f394c834c54c672344d1782c957e45d4aad883.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Pipestone |
| Iem County | Pipestone |
| Iem State | MN |
| Iem Wfo | FSD |
| Iem Remark | Most of the hail was dime to nickel sized. A few quarters were mixed in. |
| MergedSources | [{"id":"iem_H_44.000_-96.310_1779661200000","source":"iem","severity":"low","severityValue":25,"timestamp":1779661200000,"latitude":44,"longitude":-96.31}] |
Safety Information
Always follow official guidance from your local emergency management agency. This platform provides scientific monitoring data and is not a substitute for official warnings. If you are in immediate danger, contact your local emergency number.
Series begins 8 March 2026. Comparisons refer to that period only. Collection gap: 14-26 August 2026.
This data is aggregated algorithmically from scientific sources. Not a replacement for official emergency warnings.
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