Right now
The most recent data we hold from NOAA arrived 4 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 11 June 2026 at 09:00 UTC. It is kept here as a record.
It is the 3rd strongest of the 84 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 11 at 3:23AM CDT until June 11 at 4:00AM CDT by NWS Omaha/Valley NE
An estimated 76,364 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 11, 2026 · score 39 · 18.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 39 out of 100, at 81 % 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) | 39 / 100 |
| Our confidence | 81% |
| Coordinates | 40.7761, -98.2287 |
| Nearest City | Grand Island (20 km) |
| Population Exposed | 76.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T08:23:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.626c180cd00bb96d2e78b9f1a7b8fa4c |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Butler, NE; Lancaster, NE; Saunders, NE; Seward, NE; Clay, NE; Fillmore, NE; Hamilton, NE; York, NE; Adams, NE; Buffalo, NE; Hall, NE; Kearney, NE; Phelps, NE and 2 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 3:23AM CDT until June 11 at 4:00AM CDT by NWS Omaha/Valley NE |
| Expires | 2026-06-11T04:00:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.626c180cd00bb96d2e78b9f1a7b8fa4c69821018.001.1","noaa_urn:oid:2.49.0.1.840.0.6adc1561ac6e9a43139d69524c78d0f2f9c902b8.001.1","noaa_urn:oid:2.49.0.1.840.0.89855b4cfb2b16ca70fdab0ccf4eafb8bfac1b44.001.1","noaa_urn:oid:2.49.0.1.840.0.f955918c3c702bda60618cf532901811e0da936a.001.1","noaa_urn:oid:2.49.0.1.840.0.afa7b5fddf3f797a3de1f1db8f42d8c69e0a99a0.001.1"] |
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 near Grand Island?
Calamity.live data shows a weather event with CalamityScore 39/100, near Grand Island (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.