This alert expired on 2 September 2026 at 05:45 UTC. It is kept here as a record.
No stronger detection stands among the 18 recorded within 20 km of this point since 15 March 2026 — 2 others scored the same. The last comparable one was on 13 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 1 at 11:57PM CDT until September 2 at 12:45AM CDT by NWS Omaha/Valley NE
An estimated 24,366 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 30, 2026 · score 40 · 9.9 km
- May 26, 2026 · score 34 · 14.9 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 40 out of 100, at 91 % 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) | 40 / 100 |
| Our confidence | 91% |
| Coordinates | 42.0800, -97.8660 |
| Nearest City | Norfolk (37 km) |
| Population Exposed | 24.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-09-02T04:57:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.7b9ce384a43a0efa56dfeabd4ba6eefb29d16163.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Antelope, NE; Madison, NE; Pierce, NE |
| Headline | Severe Thunderstorm Warning issued September 1 at 11:57PM CDT until September 2 at 12:45AM CDT by NWS Omaha/Valley NE |
| Expires | 2026-09-02T00:45:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| Spc ReportType | hail |
| Spc Speed | 200 |
| Spc Location | Randolph |
| Spc County | Cedar |
| Spc State | NE |
| Spc Comments | Report from Randolph Fire Department with picture of 2 inch hail. Report relayed via NWSChat and time estimated via radar. (OAX) |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Brunswick |
| Iem County | Antelope |
| Iem State | NE |
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 40/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.