Right now
The most recent data we hold from NOAA arrived 4 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 23 June 2026 at 01:15 UTC. It is kept here as a record.
It is the 47th strongest of the 105 detections recorded within 20 km of this point since 6 May 2026. Another comparable one was recorded here earlier the same day. 18 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 22 at 7:05PM MDT until June 22 at 7:15PM MDT by NWS Cheyenne WY
Nearby, since 6 May 2026
- May 30, 2026 · score 46 · 9.4 km
- September 5, 2026 · score 28 · 15.9 km
- July 23, 2026 · score 22 · 16.4 km
How we know
21 recorded sources include NOAA; independence is not established by this count.
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 | 0.69/1 |
| Coordinates | 40.6658, -103.0315 |
| Nearest City | Evans (144 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-23T01:05:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.1860f9091ad7576d1e0a2eb4ce85a462 |
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: 2026-06-23T01:05:00.000Z.
First archived: 2026-06-23T01:06:34.959Z. 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 | Box Butte, NE; Dawes, NE; Sioux, NE; Cheyenne, NE; Morrill, NE; Washington, CO and 1 more areas |
| Headline | Severe Thunderstorm Warning issued June 22 at 7:05PM MDT until June 22 at 7:15PM MDT by NWS Cheyenne WY |
| Expires | 2026-06-22T19:15:00-06:00 |
| SenderName | NWS Cheyenne WY |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.1860f9091ad7576d1e0a2eb4ce85a46283e8b07d.001.1","noaa_urn:oid:2.49.0.1.840.0.8ac42d4acec059ae3905fd8f6bda2eb944064086.001.1","noaa_urn:oid:2.49.0.1.840.0.906535a0b13b1a80d8de1c85b9f78d752035db9e.001.1","noaa_urn:oid:2.49.0.1.840.0.b570044763ce6862a6be2213f6a00228195387f9.001.1","noaa_urn:oid:2.49.0.1.840.0.3755314cca676d5be5295c7bc762f63442e098ce.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 2.5 |
| Iem Unit | Inch |
| Iem City | 1 S Sterling |
| Iem County | Logan |
| Iem State | CO |
| Iem Wfo | BOU |
| MergedSources | [{"id":"iem_H_41.040_-103.660_1782165900000","source":"iem","severity":"low","severityValue":25,"timestamp":1782165900000,"latitude":41.04,"longitude":-103.66},{"id":"iem_G_40.350_-103.440_1782172260000","source":"iem","severity":"low","severityValue":25,"timestamp":1782172260000,"latitude":40.35,"longitude":-103.44},{"id":"iem_H_40.990_-103.660_1782166080000","source":"iem","severity":"low","severityValue":25,"timestamp":1782166080000,"latitude":40.99,"longitude":-103.66},{"id":"iem_H_41.140_-103.660_1782162780000","source":"iem","severity":"low","severityValue":25,"timestamp":1782162780000,"latitude":41.14,"longitude":-103.66},{"id":"iem_G_40.620_-103.170_1782167340000","source":"iem","severity":"low","severityValue":25,"timestamp":1782167340000,"latitude":40.62,"longitude":-103.17},{"id":"iem_G_40.680_-103.520_1782168300000","source":"iem","severity":"low","severityValue":25,"timestamp":1782168300000,"latitude":40.68,"longitude":-103.52},{"id":"iem_H_40.620_-103.280_1782168900000","source":"iem","severity":"low","severityValue":25,"timestamp":1782168900000,"latitude":40.62,"longitude":-103.28},{"id":"iem_D_40.540_-103.350_1782171600000","source":"iem","severity":"low","severityValue":25,"timestamp":1782171600000,"latitude":40.54,"longitude":-103.35},{"id":"iem_H_41.110_-103.660_1782162780000","source":"iem","severity":"low","severityValue":25,"timestamp":1782162780000,"latitude":41.11,"longitude":-103.66},{"id":"iem_G_40.550_-103.270_1782169200000","source":"iem","severity":"low","severityValue":25,"timestamp":1782169200000,"latitude":40.55,"longitude":-103.27},{"id":"iem_H_40.640_-103.200_1782168540000","source":"iem","severity":"low","severityValue":25,"timestamp":1782168540000,"latitude":40.64,"longitude":-103.2},{"id":"iem_W_41.130_-103.660_1782162060000","source":"iem","severity":"low","severityValue":25,"timestamp":1782162060000,"latitude":41.13,"longitude":-103.66},{"id":"iem_H_41.090_-103.470_1782163680000","source":"iem","severity":"low","severityValue":25,"timestamp":1782163680000,"latitude":41.09,"longitude":-103.47},{"id":"iem_G_40.570_-103.260_1782169020000","source":"iem","severity":"low","severityValue":25,"timestamp":1782169020000,"latitude":40.57,"longitude":-103.26},{"id":"iem_H_40.750_-103.380_1782166980000","source":"iem","severity":"low","severityValue":25,"timestamp":1782166980000,"latitude":40.75,"longitude":-103.38},{"id":"iem_W_40.530_-103.540_1782169920000","source":"iem","severity":"low","severityValue":25,"timestamp":1782169920000,"latitude":40.53,"longitude":-103.54},{"id":"iem_H_40.400_-103.090_1782171540000","source":"iem","severity":"low","severityValue":25,"timestamp":1782171540000,"latitude":40.4,"longitude":-103.09},{"id":"iem_H_40.540_-103.270_1782169680000","source":"iem","severity":"low","severityValue":25,"timestamp":1782169680000,"latitude":40.54,"longitude":-103.27},{"id":"iem_G_40.350_-103.440_1782172860000","source":"iem","severity":"low","severityValue":25,"timestamp":1782172860000,"latitude":40.35,"longitude":-103.44},{"id":"iem_H_40.620_-103.220_1782169620000","source":"iem","severity":"low","severityValue":25,"timestamp":1782169620000,"latitude":40.62,"longitude":-103.22}] |
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.
Review the area, threshold and delivery channel in your account.
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