Right now
The most recent data we hold from NOAA arrived 4 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
2 other detections within 20 km in the last 24 hours, the nearest 12 km from here.
This alert expired on 18 May 2026 at 03:00 UTC. It is kept here as a record.
No stronger detection stands among the 29 recorded within 20 km of this point since 23 April 2026 — 8 others scored the same. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 17 at 9:17PM CDT until May 17 at 10:00PM CDT by NWS Omaha/Valley NE
An estimated 294,757 people live within 50 km of this point.
Nearby, since 23 April 2026
- September 7, 2026 · score 37 · 13.3 km
- July 4, 2026 · score 43 · 13.4 km
How we know
Confirmed by 17 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 | 40.5238, -96.3902 |
| Nearest City | Lincoln (39 km) |
| Population Exposed | 294.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-18T02:17:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.0abeab381aa4bd21c49344446439c661 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Harrison, IA; Pottawattamie, IA; Shelby, IA; Johnson, NE; Nemaha, NE; Otoe, NE; Marshall, KS; Washington, KS and 11 more areas |
| Headline | Severe Thunderstorm Warning issued May 17 at 9:17PM CDT until May 17 at 10:00PM CDT by NWS Omaha/Valley NE |
| Expires | 2026-05-17T22:00:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 15 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0abeab381aa4bd21c49344446439c66146d29a2e.002.1","noaa_urn:oid:2.49.0.1.840.0.bbb470153b6137a5b5f476ee35e7e2611d796050.001.1","noaa_urn:oid:2.49.0.1.840.0.67fefa1040864e9c76edb51a0ad7de5a54c166df.001.1","noaa_urn:oid:2.49.0.1.840.0.0b57270698534184d6658bc5bd37751daa08c5f2.001.1","noaa_urn:oid:2.49.0.1.840.0.7bac2177a1f0a8deeb3ef669110faa08a5deb82a.001.1","noaa_urn:oid:2.49.0.1.840.0.2f5de5a821cc6417cef2bd1f5078ec155107a252.001.1","noaa_urn:oid:2.49.0.1.840.0.4da3d534972971f36c9f9a5b5faa9ec893c8dfdb.001.1","noaa_urn:oid:2.49.0.1.840.0.df5de06e5d7f1392e5756c7b21f90036ac493f5f.001.1","noaa_urn:oid:2.49.0.1.840.0.e52c4a2c482d7e25c61a5657ce2c376fcc21bda1.001.1","noaa_urn:oid:2.49.0.1.840.0.42f6c8b2079558ae0b443c181835a16a482aa1c4.001.1","noaa_urn:oid:2.49.0.1.840.0.818552ae93cbb790cbe3272d8a60a9050ee40936.001.1","noaa_urn:oid:2.49.0.1.840.0.3b5c4dd44ef0aa5fc827fc70ea6697a71450c85d.001.1","noaa_urn:oid:2.49.0.1.840.0.4a54261b112e3de0d9148d93ff17ce2cdfb86302.001.1","noaa_urn:oid:2.49.0.1.840.0.d404b5f1c659ad2810d4463247b91e615afcbe63.001.1","noaa_urn:oid:2.49.0.1.840.0.7656007f30d8691d4351a877a16aae7b016e497b.002.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 59 |
| Iem Unit | MPH |
| Iem City | 4 WSW Murdock |
| Iem County | Cass |
| Iem State | NE |
| Iem Wfo | OAX |
| Iem Remark | Personal Weather 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 in this area?
Calamity.live data shows a weather event with CalamityScore 43/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.