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 July 2026 at 02:35 UTC. It is kept here as a record.
It is the 27th strongest of the 60 detections recorded within 20 km of this point since 28 April 2026. 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: Severe Thunderstorm Warning issued June 30 at 8:26PM MDT until June 30 at 8:30PM MDT by NWS Cheyenne WY
Nearby, since 28 April 2026
- August 10, 2026 · score 22 · 22.4 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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 |
| Legacy data-support index | 0.59/1 |
| Coordinates | 41.1152, -102.5792 |
| Nearest City | North Platte (152 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-07-01T02:26:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.0b021053409ac079c84dfe1b2602c908 |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-07-01T02:26:00.000Z.
First archived: 2026-07-01T02:29:59.775Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cheyenne, NE; Morrill, NE; Cheyenne, NE; Deuel, NE; Garden, NE; Keith, NE; Perkins, NE and 1 more areas |
| Headline | Severe Thunderstorm Warning issued June 30 at 8:26PM MDT until June 30 at 8:30PM MDT by NWS Cheyenne WY |
| Expires | 2026-06-30T20:35:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0b021053409ac079c84dfe1b2602c908fe2ca8d2.001.1","noaa_urn:oid:2.49.0.1.840.0.13950b21c159cf2e32e0dfc4e01937439c070d0a.001.1","noaa_urn:oid:2.49.0.1.840.0.021b19f0903b305c45347699f752dab8a2900d91.001.1","noaa_urn:oid:2.49.0.1.840.0.2feeb3cb301e4a9b2db4e6ec3a22f4a27b4e8ce2.001.1"] |
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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