Right now
The most recent data we hold from NOAA arrived 11 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 21 June 2026 at 22:45 UTC. It is kept here as a record.
No stronger detection stands among the 45 recorded within 20 km of this point since 15 March 2026 — 23 others scored the same. Another comparable one was recorded here earlier the same day. 11 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 21 at 5:24PM CDT until June 21 at 5:45PM CDT by NWS North Platte NE
Nearby, since 15 March 2026
- May 29, 2026 · score 22 · 8.4 km
- June 8, 2026 · score 22 · 19.5 km
- May 31, 2026 · score 22 · 26.4 km
How we know
11 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 | 0.70/1 |
| Coordinates | 39.6712, -101.4867 |
| Nearest City | North Platte (172 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-21T22:24:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.27facb70d6a88aee1d4898313e10ecec |
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: 2026-06-21T22:24:00.000Z.
First archived: 2026-06-21T22:34:08.693Z. 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 | Frontier, NE; Hayes, NE; Cheyenne, KS; Rawlins, KS; Sherman, KS; Thomas, KS; Cheyenne, CO |
| Headline | Severe Thunderstorm Warning issued June 21 at 5:24PM CDT until June 21 at 5:45PM CDT by NWS North Platte NE |
| Expires | 2026-06-21T17:45:00-05:00 |
| SenderName | NWS North Platte NE |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.27facb70d6a88aee1d4898313e10ecec85ca7a40.002.1","noaa_urn:oid:2.49.0.1.840.0.58da4f8687dcb1829bef39069a9f3c28aecdd3bc.001.1","noaa_urn:oid:2.49.0.1.840.0.f9658d54f492e51f7a11842598a78be82213d196.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Stratton |
| Iem County | Hitchcock |
| Iem State | NE |
| Iem Wfo | GLD |
| Iem Remark | Spotter Network: report of 1.00 inch hail. |
| MergedSources | [{"id":"iem_G_39.970_-102.200_1782076500000","source":"iem","severity":"low","severityValue":25,"timestamp":1782076500000,"latitude":39.97,"longitude":-102.2},{"id":"iem_G_39.780_-101.780_1782077940000","source":"iem","severity":"low","severityValue":25,"timestamp":1782077940000,"latitude":39.78,"longitude":-101.78},{"id":"iem_H_40.130_-101.270_1782076800000","source":"iem","severity":"low","severityValue":25,"timestamp":1782076800000,"latitude":40.13,"longitude":-101.27},{"id":"iem_H_40.250_-101.380_1782075120000","source":"iem","severity":"low","severityValue":25,"timestamp":1782075120000,"latitude":40.25,"longitude":-101.38},{"id":"iem_H_40.280_-101.460_1782075180000","source":"iem","severity":"low","severityValue":25,"timestamp":1782075180000,"latitude":40.28,"longitude":-101.46},{"id":"iem_G_40.020_-101.920_1782076620000","source":"iem","severity":"low","severityValue":25,"timestamp":1782076620000,"latitude":40.02,"longitude":-101.92},{"id":"iem_H_40.280_-101.400_1782075900000","source":"iem","severity":"low","severityValue":25,"timestamp":1782075900000,"latitude":40.28,"longitude":-101.4},{"id":"iem_H_39.760_-101.600_1782078960000","source":"iem","severity":"low","severityValue":25,"timestamp":1782078960000,"latitude":39.76,"longitude":-101.6},{"id":"iem_H_40.320_-101.410_1782074580000","source":"iem","severity":"low","severityValue":25,"timestamp":1782074580000,"latitude":40.32,"longitude":-101.41},{"id":"iem_H_40.150_-101.230_1782076800000","source":"iem","severity":"low","severityValue":25,"timestamp":1782076800000,"latitude":40.15,"longitude":-101.23}] |
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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