This alert expired on 26 May 2026 at 03:07 UTC. It is kept here as a record.
It is the 10th strongest of the 41 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 25 at 9:57PM CDT until May 25 at 10:00PM CDT by NWS Omaha/Valley NE
An estimated 24,366 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 30, 2026 · score 40 · 24.6 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 91 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 34 / 100 |
| Our confidence | 91% |
| Coordinates | 42.1780, -97.7420 |
| Nearest City | Norfolk (31 km) |
| Population Exposed | 24.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-26T02:57:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.6fac30a04278759231bd67ac4cd022f445c1da04.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Antelope, NE; Pierce, NE |
| Headline | Severe Thunderstorm Warning issued May 25 at 9:57PM CDT until May 25 at 10:00PM CDT by NWS Omaha/Valley NE |
| Expires | 2026-05-25T22:07:00-05:00 |
| SenderName | NWS Omaha/Valley NE |
| HasExactCoords | true |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | Oakdale |
| Iem County | Antelope |
| Iem State | NE |
| Iem Wfo | OAX |
| MergedSources | [{"id":"iem_G_42.140_-98.020_1779762540000","source":"iem","severity":"low","severityValue":25,"timestamp":1779762540000,"latitude":42.14,"longitude":-98.02},{"id":"iem_H_42.070_-97.970_1779761940000","source":"iem","severity":"low","severityValue":25,"timestamp":1779761940000,"latitude":42.07,"longitude":-97.97}] |
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 10 February 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 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.