Right now
The most recent data we hold from NOAA arrived 87 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
6 other detections within 20 km in the last 24 hours, the nearest 15 km from here.
This alert expired on 21 June 2026 at 22:00 UTC. It is kept here as a record.
No stronger detection stands among the 84 recorded within 20 km of this point since 15 March 2026 — 32 others scored the same. Another comparable one was recorded here earlier the same day. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 21 at 4:29PM CDT until June 21 at 5:00PM CDT by NWS North Platte NE
Nearby, since 15 March 2026
- May 14, 2026 · score 22 · 19.6 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 | 0.71/1 |
| Coordinates | 39.9240, -101.6752 |
| Nearest City | North Platte (153 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-06-21T21:29:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.eb30feae3144111bc2b72245d2aa30eb |
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: 2026-06-21T21:29:00.000Z.
First archived: 2026-06-21T21:30:54.987Z. 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 | Keith, NE; Lincoln, NE; Perkins, NE; Rawlins, KS; Hitchcock, NE; Cheyenne, CO; Kit Carson, CO and 2 more areas |
| Headline | Severe Thunderstorm Warning issued June 21 at 4:29PM CDT until June 21 at 5:00PM CDT by NWS North Platte NE |
| Expires | 2026-06-21T17:00:00-05:00 |
| SenderName | NWS North Platte NE |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.eb30feae3144111bc2b72245d2aa30eb41bdf8b8.001.1","noaa_urn:oid:2.49.0.1.840.0.e69781c500e338b897fb30faa0f700a414ee99de.002.1","noaa_urn:oid:2.49.0.1.840.0.5caf046f2b4a3c79019573bf192b989872c57ade.001.1","noaa_urn:oid:2.49.0.1.840.0.b0392264373d183adf79dfc2b63bcc416c0270a0.001.1","noaa_urn:oid:2.49.0.1.840.0.d7d48e1acc01e1b536b1c90824880ac633240394.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1.75 |
| Iem Unit | Inch |
| Iem City | 1 NNE Imperial |
| Iem County | Chase |
| Iem State | NE |
| Iem Wfo | LBF |
| Iem Remark | mPing Report. |
| 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_H_40.250_-101.380_1782075120000","source":"iem","severity":"low","severityValue":25,"timestamp":1782075120000,"latitude":40.25,"longitude":-101.38},{"id":"iem_G_40.020_-101.920_1782076620000","source":"iem","severity":"low","severityValue":25,"timestamp":1782076620000,"latitude":40.02,"longitude":-101.92},{"id":"iem_G_40.120_-102.280_1782075060000","source":"iem","severity":"low","severityValue":25,"timestamp":1782075060000,"latitude":40.12,"longitude":-102.28},{"id":"iem_G_40.100_-102.250_1782075300000","source":"iem","severity":"low","severityValue":25,"timestamp":1782075300000,"latitude":40.1,"longitude":-102.25},{"id":"iem_H_40.490_-101.530_1782072840000","source":"iem","severity":"low","severityValue":25,"timestamp":1782072840000,"latitude":40.49,"longitude":-101.53},{"id":"iem_H_40.280_-101.460_1782075180000","source":"iem","severity":"low","severityValue":25,"timestamp":1782075180000,"latitude":40.28,"longitude":-101.46},{"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_40.320_-101.410_1782074580000","source":"iem","severity":"low","severityValue":25,"timestamp":1782074580000,"latitude":40.32,"longitude":-101.41},{"id":"iem_H_40.530_-101.630_1782072840000","source":"iem","severity":"low","severityValue":25,"timestamp":1782072840000,"latitude":40.53,"longitude":-101.63}] |
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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