This alert expired on 10 August 2026 at 04:00 UTC. It is kept here as a record.
No stronger detection stands among the 52 recorded within 20 km of this point since 10 March 2026 — 14 others scored the same. Another comparable one was recorded here earlier the same day. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued August 9 at 10:14PM CDT until August 9 at 11:00PM CDT by NWS Quad Cities IA IL
An estimated 15,057 people live within 50 km of this point.
Nearby, since 10 March 2026
- March 11, 2026 · score 40 · 3.9 km
- June 12, 2026 · score 28 · 9.1 km
- June 11, 2026 · score 58 · 9.6 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 58 out of 100, at 84 % 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) | 58 / 100 |
| Our confidence | 84% |
| Coordinates | 41.3736, -89.5159 |
| Nearest City | Sterling (49 km) |
| Population Exposed | 15.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-08-10T03:14:00.000Z |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Bureau, IL; Knox, IL; Peoria, IL; Lee, IL |
| Headline | Tornado Warning issued August 9 at 10:14PM CDT until August 9 at 11:00PM CDT by NWS Quad Cities IA IL |
| Expires | 2026-08-09T23:00:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.90481f7eab4ea7c9c695fa3ab403fa85d834d62d.001.1","noaa_urn:oid:2.49.0.1.840.0.d0d03ff32da2292931fc3da10c7506948eaccb83.001.1","noaa_urn:oid:2.49.0.1.840.0.47edd02318b8983d86c77c08b3b70c9a1aeed52e.001.1"] |
| Iem TypeSummary | T |
| Iem City | 4 SSW Annawan |
| Iem County | Henry |
| Iem State | IL |
| Iem Wfo | DVN |
| MergedSources | [{"id":"iem_T_41.340_-89.930_1786327080000","source":"iem","severity":"low","severityValue":25,"timestamp":1786327080000,"latitude":41.34,"longitude":-89.93}] |
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.
Calamity.live data shows a weather event with CalamityScore 58/100, near Sterling (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.