Right now
The most recent data we hold from NOAA arrived 2 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 3 June 2026 at 04:00 UTC. It is kept here as a record.
No stronger detection stands among the 24 recorded within 20 km of this point since 2 April 2026 — 7 others scored the same. The last comparable one was on 14 May 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 2 at 10:43PM CDT until June 2 at 11:00PM CDT by NWS Rapid City SD
Nearby, since 2 April 2026
- July 19, 2026 · score 22 · 17.5 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, at 61 % 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 | 61% |
| Coordinates | 43.7395, -99.9403 |
| Nearest City | Mitchell (154 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-03T03:43:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.1d5d2bb88130e23b1e6ac28784e308f7 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Mellette, SD; Todd, SD; Tripp, SD; Buffalo, SD; Lyman, SD |
| Headline | Severe Thunderstorm Warning issued June 2 at 10:43PM CDT until June 2 at 11:00PM CDT by NWS Rapid City SD |
| Expires | 2026-06-02T23:00:00-05:00 |
| SenderName | NWS Rapid City SD |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1d5d2bb88130e23b1e6ac28784e308f7d48a6a75.001.1","noaa_urn:oid:2.49.0.1.840.0.ba2067fc96d045b847ba2fa2ac66e7d4a04ff8a8.001.1"] |
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.
Want to know when something happens in this area?