This alert expired on 8 August 2026 at 01:00 UTC. It is kept here as a record.
It is the 2nd strongest of the 42 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 7 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 7 at 7:20PM CDT until August 7 at 8:00PM CDT by NWS Quad Cities IA IL
An estimated 110,759 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 13, 2026 · score 43 · 13.8 km
- June 11, 2026 · score 58 · 18.0 km
How we know
Confirmed by 8 independent sources, including NOAA.
Our own score for this event is 43 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 | medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 88% |
| Coordinates | 41.4867, -91.9533 |
| Nearest City | Coralville (38 km) |
| Population Exposed | 110.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-08T00:20:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Iowa, IA; Keokuk, IA; Washington, IA |
| Headline | Severe Thunderstorm Warning issued August 7 at 7:20PM CDT until August 7 at 8:00PM CDT by NWS Quad Cities IA IL |
| Expires | 2026-08-07T20:00:00-05:00 |
| 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_42.000_-91.660_1786142100000","source":"iem","severity":"low","severityValue":25,"timestamp":1786142100000,"latitude":42,"longitude":-91.66},{"id":"iem_G_42.050_-91.600_1786141680000","source":"iem","severity":"low","severityValue":25,"timestamp":1786141680000,"latitude":42.05,"longitude":-91.6},{"id":"iem_G_42.050_-91.640_1786141560000","source":"iem","severity":"low","severityValue":25,"timestamp":1786141560000,"latitude":42.05,"longitude":-91.64},{"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_42.050_-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
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 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.
Calamity.live data shows a weather event with CalamityScore 43/100, near Coralville (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.