This alert expired on 4 July 2026 at 01:00 UTC. It is kept here as a record.
No stronger detection stands among the 32 recorded within 20 km of this point since 31 March 2026 — 11 others scored the same. Another comparable one was recorded here earlier the same day. 13 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 7:40PM CDT until July 3 at 8:00PM CDT by NWS Quad Cities IA IL
An estimated 226,585 people live within 50 km of this point.
Nearby, since 31 March 2026
- July 4, 2026 · score 43 · 9.5 km
- July 3, 2026 · score 43 · 10.1 km
- June 11, 2026 · score 37 · 18.1 km
How we know
Confirmed by 3 independent sources, including NOAA.
Our own score for this event is 43 out of 100, at 90 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Computed under scoring rules v1. Rows carrying other versions were judged by different rules and are not directly comparable.
Event Data
| Type | Severe Weather |
| Severity | Medium |
| Calamity Score (ours) | 43 / 100 |
| Our confidence | 90% |
| Coordinates | 42.0306, -89.4748 |
| Nearest City | Dixon (21 km) |
| Population Exposed | 226.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T00:40:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.70fdfcc1cab02c49e70fff2a7abcef5c |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Carroll, IL; Stephenson, IL; Ogle, IL; Winnebago, IL; Carroll, IL; Whiteside, IL and 3 more areas |
| Headline | Severe Thunderstorm Warning issued July 3 at 7:40PM CDT until July 3 at 8:00PM CDT by NWS Quad Cities IA IL |
| Expires | 2026-07-03T20:00:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.70fdfcc1cab02c49e70fff2a7abcef5cb6e106f0.002.1","noaa_urn:oid:2.49.0.1.840.0.b0699c17126a927b2089e0efc72bdd758e9ed1b2.001.1","noaa_urn:oid:2.49.0.1.840.0.398f3603200cbe626d474b7464b6240c7f6c0dfe.001.1","noaa_urn:oid:2.49.0.1.840.0.75a2c5976d62573820c452b085a5c45d170fcdc9.001.1","noaa_urn:oid:2.49.0.1.840.0.9e4a2bac52e120f5094eab97976bb75ac6ecc9d9.001.1","noaa_urn:oid:2.49.0.1.840.0.f3786bc235b396f319961c77b1787e2702bc6186.001.1"] |
| Iem TypeSummary | D |
| Iem City | 2 SE Scioto Mills |
| Iem County | Stephenson |
| Iem State | IL |
| Iem Wfo | DVN |
| Iem Remark | Tree fell and took down power lines. |
| MergedSources | [{"id":"iem_G_41.890_-89.080_1783122900000","source":"iem","severity":"low","severityValue":25,"timestamp":1783122900000,"latitude":41.89,"longitude":-89.08},{"id":"iem_D_42.330_-89.640_1783118280000","source":"iem","severity":"low","severityValue":25,"timestamp":1783118280000,"latitude":42.33,"longitude":-89.64}] |
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 8 March 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 Dixon?
Calamity.live data shows a weather event with CalamityScore 43/100, near Dixon (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.