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 July 2026 at 23:30 UTC. It is kept here as a record.
No stronger detection stands among the 18 recorded within 20 km of this point since 15 March 2026 — 11 others scored the same. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 25 at 6:02PM CDT until July 25 at 6:30PM CDT by NWS Sioux Falls SD
Nearby, since 15 March 2026
- June 2, 2026 · score 22 · 12.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 | 0.61/1 |
| Coordinates | 44.6675, -100.5452 |
| Nearest City | Aberdeen (184 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-25T23:02:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.caff874c3075d477d67ff05828b77bed |
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: 2026-07-25T23:02:00.000Z.
First archived: 2026-07-25T23:14:29.692Z. 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 | Brule, SD; Charles Mix, SD; Gregory, SD; Hand, SD; Hyde, SD; Dewey, SD and 2 more areas |
| Headline | Severe Thunderstorm Warning issued July 25 at 6:02PM CDT until July 25 at 6:30PM CDT by NWS Sioux Falls SD |
| Expires | 2026-07-25T18:30:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.caff874c3075d477d67ff05828b77bed43f9ba50.001.1","noaa_urn:oid:2.49.0.1.840.0.5073cdc7386f853691fdc318f0bc1bc4bf3ece26.002.1","noaa_urn:oid:2.49.0.1.840.0.c8f5ec4bd01995d62bcdd826edd75300578d0864.001.1","noaa_urn:oid:2.49.0.1.840.0.ecd7a1bf387aa9a6795420343450e770d93a381f.002.1","noaa_urn:oid:2.49.0.1.840.0.a716b1938ae92f454e505411b1298b352482c175.001.1"] |
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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