Right now
The most recent data we hold from NOAA arrived 14 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 17 May 2026 at 04:00 UTC. It is kept here as a record.
It is the 29th strongest of the 182 detections recorded within 20 km of this point since 27 April 2026. The last comparable one was on 16 May 2026. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Watch issued May 16 at 8:53PM CDT until May 16 at 11:00PM CDT by NWS North Platte NE
Nearby, since 27 April 2026
- September 5, 2026 · score 16 · 0.0 km
- August 12, 2026 · score 22 · 0.0 km
- July 31, 2026 · score 22 · 0.0 km
How we know
2 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 | 0.65/1 |
| Coordinates | 41.5000, -99.9000 |
| Nearest City | North Platte (84 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-05-17T01:53:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Watch_noaa_urn:oid:2.49.0.1.840.0.ba6e6b4cb32b95d42a3ae209119c0d78 |
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: 2026-05-17T01:53:00.000Z.
First archived: 2026-05-17T02:44:59.101Z. 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 Watch |
| Urgency | Future |
| Certainty | Possible |
| AreaDesc | Arthur, NE; Chase, NE; Frontier, NE; Hayes, NE; Keith, NE; Lincoln, NE; Logan, NE; McPherson, NE; Perkins, NE; Custer, NE |
| Headline | Severe Thunderstorm Watch issued May 16 at 8:53PM CDT until May 16 at 11:00PM CDT by NWS North Platte NE |
| Expires | 2026-05-16T23:00:00-05:00 |
| SenderName | NWS North Platte NE |
| HasExactCoords | false |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ba6e6b4cb32b95d42a3ae209119c0d78673d8696.002.1","noaa_urn:oid:2.49.0.1.840.0.ba6e6b4cb32b95d42a3ae209119c0d78673d8696.003.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 2 E Oconto |
| Iem County | Custer |
| Iem State | NE |
| Iem Wfo | LBF |
| MergedSources | [{"id":"iem_H_41.140_-99.720_1778970000000","source":"iem","severity":"low","severityValue":25,"timestamp":1778970000000,"latitude":41.14,"longitude":-99.72}] |
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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