This alert expired on 18 May 2026 at 02:00 UTC. It is kept here as a record.
It is the strongest of the 107 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: Tornado Warning issued May 17 at 8:32PM CDT until May 17 at 9:00PM CDT by NWS Omaha/Valley NE
An estimated 667,063 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 13, 2026 · score 48 · 6.5 km
- April 23, 2026 · score 48 · 6.5 km
- July 3, 2026 · score 48 · 6.7 km
How we know
Confirmed by 6 independent sources, including NOAA.
Our own score for this event is 72 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 | Critical |
| Calamity Score (ours) | 72 / 100 |
| Our confidence | 90% |
| Coordinates | 41.2963, -96.0215 |
| Nearest City | Omaha (8 km) |
| Population Exposed | 667.1K within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-05-18T01:32:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.0d0030bcdbaccab0d4d46afaadf94a78 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Pottawattamie, IA; Harrison, IA; Pottawattamie, IA; Marshall, KS; Washington, KS and 2 more areas |
| Headline | Tornado Warning issued May 17 at 8:32PM CDT until May 17 at 9:00PM CDT by NWS Omaha/Valley NE |
| Expires | 2026-05-17T21:00:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0d0030bcdbaccab0d4d46afaadf94a784f3773f3.002.1","noaa_urn:oid:2.49.0.1.840.0.f9253b265a72bdfd322f093a797b604b65d34986.001.1","noaa_urn:oid:2.49.0.1.840.0.d47a40930a3922695696f2ba457bc42944ca1f64.001.1","noaa_urn:oid:2.49.0.1.840.0.0eb18dea17ec70590f1c5e3c8477f68c01389e24.002.1","noaa_urn:oid:2.49.0.1.840.0.0f98d52b46fdeb4d7a8c815a4ecbc32cd253b249.001.1"] |
| 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 | Omaha World-Herald |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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 Omaha?
Calamity.live data shows a weather event with CalamityScore 72/100, near Omaha (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.