Right now
The most recent data we hold from NOAA arrived 9 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 1 June 2026 at 02:45 UTC. It is kept here as a record.
It is the 15th strongest of the 63 detections recorded within 20 km of this point since 17 May 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 31 at 9:14PM CDT until May 31 at 9:45PM CDT by NWS Sioux Falls SD
Nearby, since 17 May 2026
- June 1, 2026 · score 46 · 17.2 km
- June 1, 2026 · score 67 · 19.8 km
- September 4, 2026 · score 32 · 20.0 km
How we know
Confirmed by 12 independent sources, including NOAA.
Our own score for this event is 28 out of 100, at 69 % 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 | High |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 69% |
| Coordinates | 43.0178, -96.8822 |
| Nearest City | Sioux Falls (59 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-01T02:14:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.2c54c101c9475975e82701ddaa13c1047b204c63.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clay, SD; Lincoln, SD; Turner, SD |
| Headline | Severe Thunderstorm Warning issued May 31 at 9:14PM CDT until May 31 at 9:45PM CDT by NWS Sioux Falls SD |
| Expires | 2026-05-31T21:45:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | Davis |
| Spc County | Turner |
| Spc State | SD |
| Spc Comments | (FSD) |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 4 SW Hurley |
| Iem County | Turner |
| Iem State | SD |
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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