This alert expired on 30 June 2026 at 07:30 UTC. It is kept here as a record.
No stronger detection stands among the 19 recorded within 20 km of this point since 15 March 2026 — 2 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 30 at 2:00AM CDT until June 30 at 2:30AM CDT by NWS Omaha/Valley NE
An estimated 24,366 people live within 50 km of this point.
Nearby, since 15 March 2026
- September 2, 2026 · score 40 · 9.9 km
- May 26, 2026 · score 34 · 24.6 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 40 out of 100, at 90 % 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) | 40 / 100 |
| Our confidence | 90% |
| Coordinates | 42.0340, -97.9680 |
| Nearest City | Norfolk (45 km) |
| Population Exposed | 24.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-30T07:00:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.d5934c218b7ae6434c972a20fcbdd6134aa80ca5.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Antelope, NE; Boone, NE |
| Headline | Severe Thunderstorm Warning issued June 30 at 2:00AM CDT until June 30 at 2:30AM CDT by NWS Omaha/Valley NE |
| Expires | 2026-06-30T02:30:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| Spc ReportType | hail |
| Spc Speed | 100 |
| Spc Location | 2 N Bloomfield |
| Spc County | Knox |
| Spc State | NE |
| Spc Comments | (OAX) |
| Iem TypeSummary | G |
| Iem Magnitude | 57 |
| Iem Unit | MPH |
| Iem City | 4 NE Meadow Grove |
| Iem County | Madison |
| 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 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?
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.