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 141 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 200 in near 3 SSW Alliance, Box Butte, NE. Trained Spotter reports accumulating hail up to 2 inches in diameter and around 3 inches deep along Highway 385 SSW of Alliance. (CYS)
How we know
Confirmed by 2 independent sources, including SPC.
Our own score for this event is 28 out of 100, at 45 % 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 | 45% |
| Coordinates | 42.0600, -102.9000 |
| Nearest City | Cheyenne (190 km) |
| Impact Tier | minor |
| Date | 2026-09-06 — time not reported by the source |
| Source | https://www.spc.noaa.gov/climo/reports/today.html |
Score Breakdown
Technical Details
| ReportType | hail |
| Speed | 200 |
| Location | 3 SSW Alliance |
| County | Box Butte |
| State | NE |
| Comments | Trained Spotter reports accumulating hail up to 2 inches in diameter and around 3 inches deep along Highway 385 SSW of Alliance. (CYS) |
| Iem TypeSummary | F |
| Iem City | Alliance |
| Iem County | Box Butte |
| Iem State | NE |
| Iem Wfo | CYS |
| Iem Remark | Public sent in video of fast flowing water down a street in Alliance. |
| MergedSources | [{"id":"iem_R_42.070_-102.920_1788653580000","source":"iem","severity":"low","severityValue":25,"timestamp":1788653580000,"latitude":42.07,"longitude":-102.92},{"id":"iem_F_42.100_-102.870_1788656700000","source":"iem","severity":"low","severityValue":25,"timestamp":1788656700000,"latitude":42.1,"longitude":-102.87}] |
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.