Severe Weather in United States
Right now
The most recent data we hold from NOAA arrived 17 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 23:00 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. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued June 1 at 4:43PM 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 | 2026-06-01T22:43:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.690c8364c5eff44057aef3f3deb6f184 |
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 4:43PM MDT until June 1 at 5:00PM MDT by NWS Cheyenne WY |
| Expires | 2026-06-01T17:00:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.690c8364c5eff44057aef3f3deb6f1847a036f86.001.1","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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