Right now
The most recent data we hold from NOAA arrived 3 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 25 May 2026 at 01:00 UTC. It is kept here as a record.
No stronger detection stands among the 84 recorded within 20 km of this point since 15 March 2026 — 12 others scored the same. Another comparable one was recorded here earlier the same day. 12 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 24 at 7:36PM CDT until May 24 at 8:00PM CDT by NWS Sioux Falls SD
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 22 out of 100, at 64 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 |
| Our confidence | 64% |
| Coordinates | 43.4933, -95.9079 |
| Nearest City | Sioux Falls (66 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-25T00:36:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.aa36b329baf40eb41565533fe1337c90 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Yankton, SD; Murray, MN; Nobles, MN; Antelope, NE and 2 more areas |
| Headline | Severe Thunderstorm Warning issued May 24 at 7:36PM CDT until May 24 at 8:00PM CDT by NWS Sioux Falls SD |
| Expires | 2026-05-24T20:00:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.aa36b329baf40eb41565533fe1337c904b653c2a.002.1","noaa_urn:oid:2.49.0.1.840.0.af6a0f5286e3d545021e21a7011237f90a655015.001.1","noaa_urn:oid:2.49.0.1.840.0.2d25dcc28c490b80bb7dde13f6dc5eb0594a1e98.001.1","noaa_urn:oid:2.49.0.1.840.0.cd68604b94e13fd73e8029a39d76e0d9e5898a8c.002.1","noaa_urn:oid:2.49.0.1.840.0.773aa76222dbbc5fb4915e14ea0b08265279c7ae.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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