Severe Weather in United States
Right now
The most recent data we hold from NOAA arrived 7 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 1 June 2026 at 23:08 UTC. It is kept here as a record.
No stronger detection stands among the 89 recorded within 20 km of this point since 5 May 2026 — 3 others scored the same. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued June 1 at 4:59PM MDT until June 1 at 5:00PM MDT by NWS Cheyenne WY
Nearby, since 5 May 2026
- August 9, 2026 · score 22 · 16.0 km
- June 1, 2026 · score 46 · 17.1 km
- August 29, 2026 · score 22 · 22.7 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 46 out of 100, at 60 % 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 | Critical |
| Calamity Score (ours) | 46 / 100 |
| Our confidence | 60% |
| Coordinates | 41.9916, -103.4670 |
| Nearest City | Cheyenne (147 km) |
| Impact Tier | minor |
| Timestamp | 2026-06-01T22:59:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.d2784296f5e538f0fa0f0f3f5793b7b4 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Scotts Bluff, NE; Sioux, NE; Box Butte, NE; Morrill, NE; Scotts Bluff, NE; Sioux, NE |
| Headline | Tornado Warning issued June 1 at 4:59PM MDT until June 1 at 5:00PM MDT by NWS Cheyenne WY |
| Expires | 2026-06-01T17:08:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.d2784296f5e538f0fa0f0f3f5793b7b40f650238.001.1","noaa_urn:oid:2.49.0.1.840.0.f84777fa8699e871dd63996e2a78124aec2512b9.001.1"] |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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.
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