Right now
The most recent data we hold from NOAA arrived 2 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 01:15 UTC. It is kept here as a record.
It is the 17th strongest of the 41 detections recorded within 20 km of this point since 15 March 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 June 3 at 7:26PM CDT until June 3 at 8:15PM CDT by NWS Aberdeen SD
Nearby, since 15 March 2026
- July 19, 2026 · score 22 · 7.4 km
- June 4, 2026 · score 46 · 19.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 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) | 16 / 100 |
| Our confidence | 61% |
| Coordinates | 43.6663, -99.6690 |
| Nearest City | Mitchell (132 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-04T00:26:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.7eb1c77b97fc009c24b28087ccdc850e |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Lyman, SD; Mellette, SD; Tripp, SD |
| Headline | Severe Thunderstorm Warning issued June 3 at 7:26PM CDT until June 3 at 8:15PM CDT by NWS Aberdeen SD |
| Expires | 2026-06-03T20:15:00-05:00 |
| SenderName | NWS Aberdeen SD |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.7eb1c77b97fc009c24b28087ccdc850eae3f0097.001.1","noaa_urn:oid:2.49.0.1.840.0.9ef80b575e5d73d33fdeeac7af2c435030c9c71c.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?