This alert expired on 12 August 2026 at 14:15 UTC. It is kept here as a record.
It is the 2nd strongest of the 35 detections recorded within 20 km of this point since 10 March 2026. 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: Severe Thunderstorm Warning issued August 12 at 8:20AM CDT until August 12 at 9:15AM CDT by NWS Quad Cities IA IL
An estimated 75,230 people live within 50 km of this point.
Nearby, since 10 March 2026
- June 11, 2026 · score 32 · 19.6 km
- March 10, 2026 · score 39 · 20.8 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 39 out of 100, at 91 % 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) | 39 / 100 |
| Our confidence | 91% |
| Coordinates | 40.8834, -90.8535 |
| Nearest City | Burlington (23 km) |
| Population Exposed | 75.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-12T13:20:00.000Z |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Hancock, IL; Henderson, IL; McDonough, IL; Warren, IL; Lee, IA; Lee, IL; Ogle, IL; Knox, IL and 6 more areas |
| Headline | Severe Thunderstorm Warning issued August 12 at 8:20AM CDT until August 12 at 9:15AM CDT by NWS Quad Cities IA IL |
| Expires | 2026-08-12T09:15:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| MergedCount | 9 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5b6d3b295630d868fc74bb07f39385579d7fdf65.001.1","noaa_urn:oid:2.49.0.1.840.0.1602bf850719db1a377ae5b7c34fd796ea005de3.001.1","noaa_urn:oid:2.49.0.1.840.0.ad5f2e243cd2ba55cffd68802d61856b80562408.001.1","noaa_urn:oid:2.49.0.1.840.0.5318fc15a77c2065cdc323df69a0912f1ec77477.001.1","noaa_urn:oid:2.49.0.1.840.0.8f9b5639a5884a00f71ff0c68989e912c3048244.001.1","noaa_urn:oid:2.49.0.1.840.0.db0fd1f9f1808f30e07020a681a4543e6b8716a9.001.1","noaa_urn:oid:2.49.0.1.840.0.023d97a629ba2c9966f02cc0caad543ec4581885.002.1","noaa_urn:oid:2.49.0.1.840.0.4f20abd7dc8be6ffaffe850acb6ce2f2242893aa.001.1","noaa_urn:oid:2.49.0.1.840.0.a1002587d2dc0c412de5e1a8425b3b43f0ac6b61.001.1"] |
| Iem TypeSummary | G |
| Iem Magnitude | 61 |
| Iem Unit | MPH |
| Iem City | 1 W New London |
| Iem County | Henry |
| Iem State | IA |
| Iem Wfo | DVN |
| Iem Remark | Personal Weather Station. |
| MergedSources | [{"id":"iem_G_40.830_-91.270_1786538340000","source":"iem","severity":"low","severityValue":25,"timestamp":1786538340000,"latitude":40.83,"longitude":-91.27},{"id":"iem_H_40.930_-91.410_1786537740000","source":"iem","severity":"low","severityValue":25,"timestamp":1786537740000,"latitude":40.93,"longitude":-91.41},{"id":"iem_G_40.810_-91.160_1786538580000","source":"iem","severity":"low","severityValue":25,"timestamp":1786538580000,"latitude":40.81,"longitude":-91.16},{"id":"iem_G_40.930_-91.430_1786537380000","source":"iem","severity":"low","severityValue":25,"timestamp":1786537380000,"latitude":40.93,"longitude":-91.43}] |
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 39/100, near Burlington (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.