This alert expired on 2 September 2026 at 00:30 UTC. It is kept here as a record.
No stronger detection stands among the 17 recorded within 20 km of this point since 27 April 2026 — 6 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 1 at 6:27PM CDT until September 1 at 7:30PM CDT by NWS North Platte NE
Nearby, since 27 April 2026
- September 1, 2026 · score 28 · 19.6 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 28 out of 100, at 71 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | high |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 71% |
| Coordinates | 42.6456, -98.8934 |
| Nearest City | Mitchell (138 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-01T23:27:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.6ba2d03b04481304c4ac40fd6e401df2c35524a1.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Boyd, NE; Holt, NE; Holt, NE; Rock, NE; Bon Homme, SD; Charles Mix, SD; Douglas, SD; Hutchinson, SD and 1 more areas |
| Headline | Severe Thunderstorm Warning issued September 1 at 6:27PM CDT until September 1 at 7:30PM CDT by NWS North Platte NE |
| Expires | 2026-09-01T19:30:00-05:00 |
| SenderName | NWS North Platte NE |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.6ba2d03b04481304c4ac40fd6e401df2c35524a1.001.1","noaa_urn:oid:2.49.0.1.840.0.cf886e47c5875381f470634e6a9fc04e17077b7c.001.1","noaa_urn:oid:2.49.0.1.840.0.123d3d183f3d46d1811cc8f5174024c555046e6c.001.1","noaa_urn:oid:2.49.0.1.840.0.748db61a555ecaff1e056a5593b8340217dd8142.001.1","noaa_urn:oid:2.49.0.1.840.0.e86ea0d2b5f799998d04f1c8ce14b8538db00e18.001.1"] |
| Spc ReportType | hail |
| Spc Speed | 175 |
| Spc Location | 1 WSW Marty |
| Spc County | Charles Mix |
| Spc State | SD |
| Spc Comments | In addition to golf ball sized hail... winds were gusting at 40-50 mph... and rainfall was heavy. (FSD) |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 11 SSE Bassett |
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 10 February 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?
Calamity.live data shows a weather event with CalamityScore 28/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.