Right now
The most recent data we hold from NOAA arrived 51 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 19 May 2026 at 02:45 UTC. It is kept here as a record.
It is the strongest of the 37 detections recorded within 20 km of this point since 15 April 2026. The last comparable one was on 17 April 2026.
What the source measured
NOAA reported: Tornado Warning issued May 18 at 9:06PM CDT until May 18 at 9:45PM CDT by NWS Des Moines IA
An estimated 42,745 people live within 50 km of this point.
Nearby, since 15 April 2026
- July 6, 2026 · score 34 · 8.2 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 58 out of 100, at 81 % 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) | 58 / 100 |
| Our confidence | 81% |
| Coordinates | 41.8760, -92.5780 |
| Nearest City | Marshalltown (34 km) |
| Population Exposed | 42.7K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-19T02:06:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.c438ea29d3051ab9bc6ac2c39ee7f328e11dc9e7.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Poweshiek, IA; Tama, IA |
| Headline | Tornado Warning issued May 18 at 9:06PM CDT until May 18 at 9:45PM CDT by NWS Des Moines IA |
| Expires | 2026-05-18T21:45:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 58/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.