Right now
The most recent data we hold from NOAA arrived 28 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 17 May 2026 at 22:00 UTC. It is kept here as a record.
No stronger detection stands among the 63 recorded within 20 km of this point since 16 May 2026 — 10 others scored the same. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 17 at 4:23PM CDT until May 17 at 5:00PM CDT by NWS Hastings NE
An estimated 51,440 people live within 50 km of this point.
Nearby, since 16 May 2026
- June 20, 2026 · score 39 · 5.8 km
- August 13, 2026 · score 39 · 17.0 km
- May 31, 2026 · score 34 · 24.4 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 84 % 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) | 39 / 100 |
| Our confidence | 84% |
| Coordinates | 41.1542, -98.7651 |
| Nearest City | Grand Island (44 km) |
| Population Exposed | 51.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-17T21:23:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.234de82878141d7d9703e58ec4adbf18 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Buffalo, NE; Hall, NE; Howard, NE; Sherman, NE; Howard, NE; Sherman, NE |
| Headline | Severe Thunderstorm Warning issued May 17 at 4:23PM CDT until May 17 at 5:00PM CDT by NWS Hastings NE |
| Expires | 2026-05-17T17:00:00-05:00 |
| SenderName | NWS Hastings NE |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.234de82878141d7d9703e58ec4adbf18915e8eda.001.1","noaa_urn:oid:2.49.0.1.840.0.9609cbfc92573dcaca0ee95162f21a07be6d5fee.001.1"] |
| Iem TypeSummary | H |
| Iem Magnitude | 1 |
| Iem Unit | Inch |
| Iem City | 3 SE Ravenna |
| Iem County | Buffalo |
| Iem State | NE |
| Iem Wfo | GID |
| MergedSources | [{"id":"iem_H_41.000_-98.870_1779052440000","source":"iem","severity":"low","severityValue":25,"timestamp":1779052440000,"latitude":41,"longitude":-98.87}] |
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 39/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.