This alert expired on 18 May 2026 at 01:50 UTC. It is kept here as a record.
It is the 5th strongest of the 37 detections recorded within 20 km of this point since 15 March 2026. 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 May 17 at 8:42PM CDT until May 17 at 8:45PM CDT by NWS Sioux Falls SD
An estimated 331,188 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 28, 2026 · score 43 · 8.0 km
- May 14, 2026 · score 43 · 18.5 km
- May 18, 2026 · score 48 · 18.7 km
How we know
Confirmed by 15 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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) | 43 / 100 |
| Our confidence | 90% |
| Coordinates | 40.8914, -96.4259 |
| Nearest City | Lincoln (23 km) |
| Population Exposed | 331.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-18T01:42:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.9a3462aad570a6b0bfa96ee254e4ac59 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | O'Brien, IA; Osceola, IA; Plymouth, IA; Sioux, IA; Harrison, IA; Monona, IA; Lancaster, NE; Saunders, NE and 16 more areas |
| Headline | Severe Thunderstorm Warning issued May 17 at 8:42PM CDT until May 17 at 8:45PM CDT by NWS Sioux Falls SD |
| Expires | 2026-05-17T20:50:00-05:00 |
| SenderName | NWS Sioux Falls SD |
| HasExactCoords | true |
| MergedCount | 21 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.9a3462aad570a6b0bfa96ee254e4ac5924a1226f.001.1","noaa_urn:oid:2.49.0.1.840.0.939fe375ba1eb17aace909667108a542c18235cc.001.1","noaa_urn:oid:2.49.0.1.840.0.801e0cac519ef1191301861e98107c4e83c8b05f.002.1","noaa_urn:oid:2.49.0.1.840.0.41e485d0e07a384556207a62220bb751fcf642a2.001.1","noaa_urn:oid:2.49.0.1.840.0.d547addd8d211077a0d67348b58fdcdf4c4b735d.002.1","noaa_urn:oid:2.49.0.1.840.0.1c866890e8ce0f8dac3170c7ee42b75ec6494032.001.1","noaa_urn:oid:2.49.0.1.840.0.ee8b2d5ff7a671d6f1708cd4d891d98d590254b6.001.1","noaa_urn:oid:2.49.0.1.840.0.f71815c04e40e804b602ba0b20230797df9adcfe.001.1","noaa_urn:oid:2.49.0.1.840.0.010b983864084cbd53a07dac961f3dc4db32ebd8.001.1","noaa_urn:oid:2.49.0.1.840.0.53644d6b79a6a658bebaaebe1049989fb5be2fc1.001.1","noaa_urn:oid:2.49.0.1.840.0.7744a48215a5b4eae6e280b1a0474ac59b67975a.001.1","noaa_urn:oid:2.49.0.1.840.0.105f71e2e3043bc14f09a50a84171795827ad32d.001.1","noaa_urn:oid:2.49.0.1.840.0.3b5c4dd44ef0aa5fc827fc70ea6697a71450c85d.001.1","noaa_urn:oid:2.49.0.1.840.0.c63b32b9c249f1c2b0c746c81c207aa0328b241f.001.1","noaa_urn:oid:2.49.0.1.840.0.cce8b013984e65711debc36d82c64aa12a3ed216.001.1","noaa_urn:oid:2.49.0.1.840.0.a01fd7a21cff7c43be25535ca65a1e04d647d667.001.1","noaa_urn:oid:2.49.0.1.840.0.831dd8a7e6100701ee8fde9939729fb98dbdf6b2.001.1","noaa_urn:oid:2.49.0.1.840.0.284b935cea8ff38989a1db338f160ef723416239.001.1","noaa_urn:oid:2.49.0.1.840.0.1d05d15e5503507779fdb1286891bab41a554e27.001.1","noaa_urn:oid:2.49.0.1.840.0.93b5303785ab69229bef5a8db64df42ed9e6829a.001.1","noaa_urn:oid:2.49.0.1.840.0.2404160cb0f6d56d89df8b4ba46fba4fa6c8fa01.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 58 |
| Iem Unit | MPH |
| Iem City | 6 E Rogers |
| Iem County | Dodge |
| Iem State | NE |
| Iem Wfo | OAX |
| Iem Remark | UPR Station. |
| Google News RssFeed | weather |
| Google News SourceName | Hays Post |
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.
Want to know when something happens near Lincoln?
Calamity.live data shows a weather event with CalamityScore 43/100, near Lincoln (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.