Right now
The most recent data we hold from NOAA arrived 5 hours 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 00:15 UTC. It is kept here as a record.
It is the 61st strongest of the 117 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 24 at 6:47PM CDT until May 24 at 7:15PM CDT by NWS North Platte NE
Nearby, since 16 March 2026
- May 24, 2026 · score 22 · 1.0 km
- May 25, 2026 · score 22 · 21.4 km
How we know
6 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 | 0.69/1 |
| Coordinates | 42.9500, -97.7587 |
| Nearest City | Mitchell (87 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-24T23:47:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.e0a9c9b760e3fc80b4eed94dfee9643a |
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: 2026-05-24T23:47:00.000Z.
First archived: 2026-05-24T23:53:39.885Z. 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 | Holt, NE; McCook, SD; Minnehaha, SD; Bon Homme, SD; Hutchinson, SD; Yankton, SD |
| Headline | Severe Thunderstorm Warning issued May 24 at 6:47PM CDT until May 24 at 7:15PM CDT by NWS North Platte NE |
| Expires | 2026-05-24T19:15:00-05:00 |
| SenderName | NWS North Platte NE |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.e0a9c9b760e3fc80b4eed94dfee9643a668d8de8.001.1","noaa_urn:oid:2.49.0.1.840.0.eed9c87b55291c8dc77963d27ff441ee6aa0bbc4.002.1","noaa_urn:oid:2.49.0.1.840.0.62b51ed075c78e4bb63f244503fc21192dfa0e5c.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.75 |
| Iem Unit | Inch |
| Iem City | 6 NW Scotland |
| Iem County | Hutchinson |
| Iem State | SD |
| Iem Wfo | FSD |
| MergedSources | [{"id":"iem_H_43.180_-98.070_1779660660000","source":"iem","severity":"low","severityValue":25,"timestamp":1779660660000,"latitude":43.18,"longitude":-98.07},{"id":"iem_H_43.230_-97.970_1779661560000","source":"iem","severity":"low","severityValue":25,"timestamp":1779661560000,"latitude":43.23,"longitude":-97.97},{"id":"iem_H_43.240_-97.900_1779662400000","source":"iem","severity":"low","severityValue":25,"timestamp":1779662400000,"latitude":43.24,"longitude":-97.9},{"id":"iem_H_43.220_-97.830_1779663300000","source":"iem","severity":"low","severityValue":25,"timestamp":1779663300000,"latitude":43.22,"longitude":-97.83},{"id":"iem_H_43.210_-97.780_1779663480000","source":"iem","severity":"low","severityValue":25,"timestamp":1779663480000,"latitude":43.21,"longitude":-97.78}] |
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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