Right now
The most recent data we hold from NOAA arrived 4 hours 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 30 May 2026 at 23:30 UTC. It is kept here as a record.
It is the 9th strongest of the 81 detections recorded within 20 km of this point since 16 May 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 30 at 5:20PM MDT until May 30 at 5:30PM MDT by NWS Cheyenne WY
Nearby, since 16 May 2026
- September 8, 2026 · score 16 · 6.4 km
- September 7, 2026 · score 16 · 18.9 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 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 | Medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 60% |
| Coordinates | 40.0972, -100.9711 |
| Nearest City | North Platte (115 km) |
| Impact Tier | minor |
| Timestamp | 2026-05-30T23:20:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.64ed1617c46c3e2c5cdd6266cb7b3f06 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Kimball, NE; Yuma, CO; Deuel, NE; Garden, NE; Keith, NE; Perkins, NE and 9 more areas |
| Headline | Severe Thunderstorm Warning issued May 30 at 5:20PM MDT until May 30 at 5:30PM MDT by NWS Cheyenne WY |
| Expires | 2026-05-30T17:30:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 12 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.64ed1617c46c3e2c5cdd6266cb7b3f068d317590.001.1","noaa_urn:oid:2.49.0.1.840.0.adc824ebbd396a5f0aafaba137c27a97e56094c7.001.1","noaa_urn:oid:2.49.0.1.840.0.c0deabbd47563b31efcbd7823d68b166e95b0cb8.001.1","noaa_urn:oid:2.49.0.1.840.0.6322608a49986c730fb1a9e0634628e3768d0450.001.1","noaa_urn:oid:2.49.0.1.840.0.e17bfb9110ea6149e2dab1a002fb9f1c18eee5c5.001.1","noaa_urn:oid:2.49.0.1.840.0.611673fd7dca4f312b3b200ceb40cfb743a3fc2e.001.1","noaa_urn:oid:2.49.0.1.840.0.fcdc2f89777b4444f3c668471d88dee5fa546588.001.1","noaa_urn:oid:2.49.0.1.840.0.c26f4222e53e3b6389918fece364fdb61c45a881.001.1","noaa_urn:oid:2.49.0.1.840.0.686c6ef037ef7461d4a5344903a1ef9f775534b7.001.1","noaa_urn:oid:2.49.0.1.840.0.d11f6d7da393051778ec8fb5d9f81e65ae584a40.001.1","noaa_urn:oid:2.49.0.1.840.0.0e279fd2b5dffe72b4a87867b6839543adad7101.001.1","noaa_urn:oid:2.49.0.1.840.0.b0bff223c9e861d52a5d1374a9deec87d6c55250.001.1"] |
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.
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