This alert expired on 12 August 2026 at 13:15 UTC. It is kept here as a record.
It is the 4th strongest of the 64 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued August 12 at 7:22AM CDT until August 12 at 8:15AM CDT by NWS Quad Cities IA IL
An estimated 281,859 people live within 50 km of this point.
Nearby, since 16 March 2026
- June 10, 2026 · score 37 · 4.2 km
- August 11, 2026 · score 67 · 5.5 km
- June 14, 2026 · score 37 · 11.9 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 86 % 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 | 86% |
| Coordinates | 41.6055, -90.1145 |
| Nearest City | Clinton (27 km) |
| Population Exposed | 281.9K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-12T12:22:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Bureau, IL; Henry, IL; Whiteside, IL; Henry, IL; Rock Island, IL; Clinton, IA; Scott, IA |
| Headline | Severe Thunderstorm Warning issued August 12 at 7:22AM CDT until August 12 at 8:15AM CDT by NWS Quad Cities IA IL |
| Expires | 2026-08-12T08:15:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ea934565e8381b259040f14c8c4dadf1b4c08f4e.001.1","noaa_urn:oid:2.49.0.1.840.0.470f806e0381762a359025fbd1e2d1356e705315.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 59 |
| Iem Unit | MPH |
| Iem City | Davenport Municipality |
| Iem County | Scott |
| Iem State | IA |
| Iem Wfo | DVN |
| Iem Remark | ASOS. |
| MergedSources | [{"id":"iem_G_41.620_-90.580_1786536240000","source":"iem","severity":"low","severityValue":25,"timestamp":1786536240000,"latitude":41.62,"longitude":-90.58}] |
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 Clinton (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.