Right now
The most recent data we hold from NOAA arrived 29 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 02:53 UTC. It is kept here as a record.
It is the 5th strongest of the 35 detections recorded within 20 km of this point since 14 April 2026. Another comparable one was recorded here earlier the same day. 3 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 16 at 9:44PM CDT until May 16 at 9:45PM CDT by NWS Des Moines IA
An estimated 109,715 people live within 50 km of this point.
Nearby, since 14 April 2026
- July 2, 2026 · score 43 · 13.8 km
- August 7, 2026 · score 37 · 19.2 km
- July 5, 2026 · score 43 · 20.1 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 43 out of 100, at 80 % 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 | 80% |
| Coordinates | 42.7600, -92.2460 |
| Nearest City | Cedar Falls (31 km) |
| Population Exposed | 109.7K within 50 km |
| Impact Tier | significant |
| Date | 2026-05-17 — time not reported by the source |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.b82e146d475d83d2f5d3ebe26635abed91d2a5cf.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Bremer, IA |
| Headline | Severe Thunderstorm Warning issued May 16 at 9:44PM CDT until May 16 at 9:45PM CDT by NWS Des Moines IA |
| Expires | 2026-05-16T21:53:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
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.