This alert expired on 13 August 2026 at 11:22 UTC. It is kept here as a record.
No stronger detection stands among the 6 recorded within 20 km of this point since 15 April 2026 — one other scored the same. 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: Tornado Warning issued August 13 at 6:13AM CDT until August 13 at 6:15AM CDT by NWS Des Moines IA
Nearby, since 15 April 2026
- June 1, 2026 · score 34 · 18.1 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 46 out of 100, at 70 % 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) | 46 / 100 |
| Our confidence | 70% |
| Coordinates | 42.0417, -94.3583 |
| Nearest City | Fort Dodge (53 km) |
| Impact Tier | minor |
| Timestamp | 2026-08-13T11:13:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.67da5daf782c0f36044ab4c106e7b71436564ff1.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Greene, IA |
| Headline | Tornado Warning issued August 13 at 6:13AM CDT until August 13 at 6:15AM CDT by NWS Des Moines IA |
| Expires | 2026-08-13T06:22:00-05:00 |
| SenderName | NWS Des Moines IA |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 66 |
| Iem Unit | MPH |
| Iem City | 7 SW Gray |
| Iem County | Audubon |
| Iem State | IA |
| Iem Wfo | DMX |
| Iem Remark | Measured from personal weather station. |
| MergedSources | [{"id":"iem_G_41.730_-94.940_1786616940000","source":"iem","severity":"low","severityValue":25,"timestamp":1786616940000,"latitude":41.73,"longitude":-94.94},{"id":"iem_G_41.770_-95.080_1786616340000","source":"iem","severity":"low","severityValue":25,"timestamp":1786616340000,"latitude":41.77,"longitude":-95.08}] |
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 46/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.