Right now
The most recent data we hold from NOAA arrived 5 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
5 other detections within 20 km in the last 24 hours, the nearest 18 km from here.
This alert expired on 6 September 2026 at 21:30 UTC. It is kept here as a record.
No stronger detection stands among the 22 recorded within 20 km of this point since 13 August 2026 — 14 others scored the same. The last comparable one was on 14 August 2026.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued September 6 at 3:47PM CDT until September 6 at 4:30PM CDT by NWS Des Moines IA
Nearby, since 13 August 2026
- September 6, 2026 · score 16 · 20.5 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 16 out of 100, at 60 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v4. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 16 / 100 |
| Our confidence | 60% |
| Coordinates | 41.5629, -94.7564 |
| Nearest City | Waukee (72 km) |
| Impact Tier | minor |
| Timestamp | 2026-09-06T20:47:00.000Z |
| Source | https://api.weather.gov/alerts/urn%3Aoid%3A2.49.0.1.840.0.ef988a0823b127a3b9c23d20f3ed93f0b139cb1b.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Calhoun, IA; Carroll, IA; Crawford, IA; Sac, IA; Adams, IA; Union, IA |
| Headline | Severe Thunderstorm Warning issued September 6 at 3:47PM CDT until September 6 at 4:30PM CDT by NWS Des Moines IA |
| Expires | 2026-09-06T16:30:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ef988a0823b127a3b9c23d20f3ed93f0b139cb1b.001.1","noaa_urn:oid:2.49.0.1.840.0.94555d891a0e5c9f1fc1716fa689cf401ad36eb6.001.1"] |
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 16/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.