Right now
The most recent data we hold from NOAA arrived 4 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 4 June 2026 at 02:00 UTC. It is kept here as a record.
No stronger detection stands among the 8 recorded within 20 km of this point since 4 June 2026 — one other scored the same.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 3 at 8:32PM CDT until June 3 at 9:00PM CDT by NWS Sioux Falls SD
An estimated 15,669 people live within 50 km of this point.
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 28 out of 100, at 81 % 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) | 28 / 100 |
| Our confidence | 81% |
| Coordinates | 43.9003, -98.5872 |
| Nearest City | Mitchell (49 km) |
| Population Exposed | 15.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-04T01:32:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.22ccd0dff094edf492188dd3e235253d |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Beadle, SD; Kingsbury, SD; Lyman, SD; Deuel, SD and 2 more areas |
| Headline | Severe Thunderstorm Warning issued June 3 at 8:32PM CDT until June 3 at 9:00PM CDT by NWS Sioux Falls SD |
| Expires | 2026-06-03T21:00:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.22ccd0dff094edf492188dd3e235253dc1016df6.001.1","noaa_urn:oid:2.49.0.1.840.0.7da3cc6cca176d6cd7251719d3afc5388e1cc666.001.1","noaa_urn:oid:2.49.0.1.840.0.865821cf4d804f2a848532423981056b6dcc0a45.002.1","noaa_urn:oid:2.49.0.1.840.0.f9ca78c767098c1a001454332b257f4f6fc7d24b.001.1","noaa_urn:oid:2.49.0.1.840.0.54f7470b0966a4801e9dc74fd5c8f7ff6f22db3f.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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