This alert expired on 7 August 2026 at 23:16 UTC. It is kept here as a record.
No stronger detection stands among the 53 recorded within 20 km of this point since 15 March 2026 — 2 others scored the same. Another comparable one was recorded here earlier the same day. 13 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued August 7 at 6:07PM CDT until August 7 at 6:15PM CDT by NWS Quad Cities IA IL
An estimated 278,494 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 10, 2026 · score 43 · 11.6 km
- August 7, 2026 · score 37 · 14.7 km
- July 11, 2026 · score 43 · 15.2 km
How we know
Confirmed by 12 independent sources, including NOAA.
Our own score for this event is 67 out of 100, at 88 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | critical |
| Calamity Score (ours) | 67 / 100 |
| Our confidence | 88% |
| Coordinates | 41.9450, -91.0938 |
| Nearest City | Marion (43 km) |
| Population Exposed | 278.5K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-08-07T23:07:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.4c40272257624f255ae216447897bf2a86971602.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Cedar, IA; Jones, IA |
| Headline | Tornado Warning issued August 7 at 6:07PM CDT until August 7 at 6:15PM CDT by NWS Quad Cities IA IL |
| Expires | 2026-08-07T18:16:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| Iem TypeSummary | G |
| Iem Magnitude | 60 |
| Iem Unit | MPH |
| Iem City | 2 W Marion |
| Iem County | Linn |
| Iem State | IA |
| Iem Wfo | DVN |
| MergedSources | [{"id":"iem_G_42.350_-91.480_1786140180000","source":"iem","severity":"low","severityValue":25,"timestamp":1786140180000,"latitude":42.35,"longitude":-91.48},{"id":"iem_G_42.050_-91.600_1786141680000","source":"iem","severity":"low","severityValue":25,"timestamp":1786141680000,"latitude":42.05,"longitude":-91.6},{"id":"iem_D_42.240_-91.430_1786141380000","source":"iem","severity":"low","severityValue":25,"timestamp":1786141380000,"latitude":42.24,"longitude":-91.43},{"id":"iem_H_42.350_-91.480_1786140840000","source":"iem","severity":"low","severityValue":25,"timestamp":1786140840000,"latitude":42.35,"longitude":-91.48},{"id":"iem_G_42.050_-91.640_1786141560000","source":"iem","severity":"low","severityValue":25,"timestamp":1786141560000,"latitude":42.05,"longitude":-91.64},{"id":"iem_D_42.200_-91.520_1786141020000","source":"iem","severity":"low","severityValue":25,"timestamp":1786141020000,"latitude":42.2,"longitude":-91.52},{"id":"iem_G_42.030_-91.640_1786142340000","source":"iem","severity":"low","severityValue":25,"timestamp":1786142340000,"latitude":42.03,"longitude":-91.64},{"id":"iem_G_42.120_-91.890_1786141140000","source":"iem","severity":"low","severityValue":25,"timestamp":1786141140000,"latitude":42.12,"longitude":-91.89},{"id":"iem_G_42.350_-91.480_1786140420000","source":"iem","severity":"low","severityValue":25,"timestamp":1786140420000,"latitude":42.35,"longitude":-91.48},{"id":"iem_G_42.050_-91.680_1786141320000","source":"iem","severity":"low","severityValue":25,"timestamp":1786141320000,"latitude":42.05,"longitude":-91.68},{"id":"iem_G_42.030_-91.620_1786142460000","source":"iem","severity":"low","severityValue":25,"timestamp":1786142460000,"latitude":42.03,"longitude":-91.62}] |
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 10 February 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 near Marion?
Calamity.live data shows a weather event with CalamityScore 67/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.