This alert expired on 11 August 2026 at 13:45 UTC. It is kept here as a record.
No stronger detection stands among the 30 recorded within 20 km of this point since 16 March 2026 — one other scored the same. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued August 11 at 8:07AM CDT until August 11 at 8:45AM CDT by NWS Quad Cities IA IL
An estimated 58,799 people live within 50 km of this point.
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 63 out of 100, at 81 % 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) | 63 / 100 |
| Our confidence | 81% |
| Coordinates | 42.2354, -90.6361 |
| Nearest City | Dubuque (29 km) |
| Population Exposed | 58.8K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-08-11T13:07:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.b3ee47bf124de890d50a08b28b29d3af |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Clinton, IA; Jackson, IA; Dubuque, IA |
| Headline | Tornado Warning issued August 11 at 8:07AM CDT until August 11 at 8:45AM CDT by NWS Quad Cities IA IL |
| Expires | 2026-08-11T08:45:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b3ee47bf124de890d50a08b28b29d3af2d24d6af.001.1","noaa_urn:oid:2.49.0.1.840.0.8529caaa4713d6802dd0d07623965bdd185e9668.002.1"] |
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 Dubuque?
Calamity.live data shows a weather event with CalamityScore 63/100, near Dubuque (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.