This alert expired on 18 May 2026 at 02:15 UTC. It is kept here as a record.
No stronger detection stands among the 51 recorded within 20 km of this point since 15 March 2026 — 5 others scored the same. Another comparable one was recorded here earlier the same day. 6 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 17 at 8:26PM CDT until May 17 at 9:15PM CDT by NWS Des Moines IA
An estimated 667,063 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 3, 2026 · score 48 · 7.4 km
- May 18, 2026 · score 48 · 7.6 km
- June 1, 2026 · score 48 · 15.2 km
How we know
Confirmed by 15 independent sources, including NOAA.
Our own score for this event is 48 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) | 48 / 100 |
| Our confidence | 90% |
| Coordinates | 41.1806, -96.3477 |
| Nearest City | Papillion (26 km) |
| Population Exposed | 667.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-18T01:26:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.105f71e2e3043bc14f09a50a84171795 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Calhoun, IA; Palo Alto, IA; Pocahontas, IA; Sac, IA; Harrison, IA; Shelby, IA; Cass, NE; Douglas, NE; Sarpy, NE; Saunders, NE and 16 more areas |
| Headline | Severe Thunderstorm Warning issued May 17 at 8:26PM CDT until May 17 at 9:15PM CDT by NWS Des Moines IA |
| Expires | 2026-05-17T21:15:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| MergedCount | 19 |
| MergedIds | ["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:2.49.0.1.840.0.3735bff9ffdbb5bb2253a18c43ae804898899d74.001.1","noaa_urn:oid:2.49.0.1.840.0.1e451cb8d6097c49927dc2125b9992d1b097819d.001.1","noaa_urn:oid:2.49.0.1.840.0.e49bcd0184b44e31f941af34c13ba29b66e3fd81.001.1","noaa_urn:oid:2.49.0.1.840.0.cce8b013984e65711debc36d82c64aa12a3ed216.001.1","noaa_urn:oid:2.49.0.1.840.0.e19168ff90fab37586c4bfeaa0177ed8647a5695.001.1","noaa_urn:oid:2.49.0.1.840.0.a01fd7a21cff7c43be25535ca65a1e04d647d667.001.1","noaa_urn:oid:2.49.0.1.840.0.96c13a6fcf24bd04f54ab57533bab067e6800645.001.1","noaa_urn:oid:2.49.0.1.840.0.3ab9431085bd950c1c50cb5c26815a7f8f989132.002.1","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:2.49.0.1.840.0.756672ed887f15185cdbda8bcca2dd007e754549.001.1","noaa_urn:oid:2.49.0.1.840.0.bcc4aa2dcccfab76adeb975561ae51668c864d77.001.1","noaa_urn:oid:2.49.0.1.840.0.1d05d15e5503507779fdb1286891bab41a554e27.001.1","noaa_urn:oid:2.49.0.1.840.0.f7871fc5f55f6e3ee2c563153e7b48389cbd97bb.001.1","noaa_urn:oid:2.49.0.1.840.0.c63b32b9c249f1c2b0c746c81c207aa0328b241f.001.1","noaa_urn:oid:2.49.0.1.840.0.42dadc6e49f6dacae442398879730430df89e8dd.001.1","noaa_urn:oid:2.49.0.1.840.0.c938fa8ba585c54055b36dcb928d1429b4c0bf42.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 64 |
| Iem Unit | MPH |
| Iem City | 3 NNE Snyder |
| Iem County | Cuming |
| Iem State | NE |
| Iem Wfo | OAX |
| Iem Remark | Personal weather Station. |
| Google News RssFeed | weather |
| Google News SourceName | Omaha World-Herald |
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 Papillion?
Calamity.live data shows a weather event with CalamityScore 48/100, near Papillion (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.