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.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 5 August 2026 at 11:30 UTC. It is kept here as a record.
It is the 9th strongest of the 36 detections recorded within 20 km of this point since 2 April 2026. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 5 at 6:17AM CDT until August 5 at 6:30AM CDT by NWS Des Moines IA
Nearby, since 2 April 2026
- June 13, 2026 · score 22 · 16.5 km
- June 10, 2026 · score 16 · 18.7 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.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 16 / 100 |
| Legacy data-support index | 0.62/1 |
| Coordinates | 40.6305, -93.4468 |
| Nearest City | Indianola (82 km) |
| Urban exposure index (PEI) | 0 within 50 km |
| Impact Tier | minor |
| Timestamp | 2026-08-05T11:17:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.db9515a7ec60b56a6cc87606f9b2e15f |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-08-05T11:17:00.000Z.
First archived: 2026-08-05T11:20:47.153Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Decatur, IA; Wayne, IA; Mercer, MO; Appanoose, IA; Wayne, IA |
| Headline | Severe Thunderstorm Warning issued August 5 at 6:17AM CDT until August 5 at 6:30AM CDT by NWS Des Moines IA |
| Expires | 2026-08-05T06:30:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.db9515a7ec60b56a6cc87606f9b2e15f8f4afbde.001.1","noaa_urn:oid:2.49.0.1.840.0.3a93f3780ac3d991c1eb7b7fff2e643cca69a1df.002.1","noaa_urn:oid:2.49.0.1.840.0.b4a3859b9b6ed6834544bc4074f28250dc0de4b1.001.1"] |
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.
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