Right now
The most recent data we hold from SPC arrived 10 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
102 other detections within 20 km in the last 24 hours, the nearest <1 km from here.
Reported by SPC today.
No stronger detection stands among the 140 recorded within 20 km of this point since 5 May 2026 — 88 others scored the same. Another comparable one was recorded here earlier the same day.
What the source measured
SPC reported: Hail 100 in near 4 SSW Alliance, Box Butte, NE. Storm chaser live stream shows accumulating hail along Highway 387 southwest of Alliance. The shoulders were completed covered... with the left lane completely covered (CYS)
How we know
One source: SPC. Not yet confirmed by a second, independent source.
Our own score for this event is 28 out of 100, at 39 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | High |
| Calamity Score (ours) | 28 / 100 |
| Our confidence | 39% |
| Coordinates | 42.0500, -102.9100 |
| Nearest City | Cheyenne (188 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-06T03:49:53.163Z |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | hail |
| Speed | 100 |
| Location | 4 SSW Alliance |
| County | Box Butte |
| State | NE |
| Comments | Storm chaser live stream shows accumulating hail along Highway 387 southwest of Alliance. The shoulders were completed covered... with the left lane completely covered (CYS) |
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 28/100 (United States), based on data from spc. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.