Right now
The most recent data we hold from NOAA arrived 19 minutes ago, and this point is not in it. We record detections, not passes: an absence is not proof that nothing is there.
Nothing else has been detected within 20 km in the last 24 hours.
This alert expired on 4 July 2026 at 01:34 UTC. It is kept here as a record.
It is the 3rd strongest of the 28 detections recorded within 20 km of this point since 2 April 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 July 3 at 8:24PM CDT until July 3 at 8:30PM CDT by NWS Quad Cities IA IL
Urban PEI: 73,587 within a heuristic 50 km radius; not unique people.
Nearby, since 2 April 2026
- June 11, 2026 · score 37 · 5.0 km
- August 10, 2026 · score 39 · 19.9 km
- July 4, 2026 · score 43 · 23.0 km
How we know
3 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 39 out of 100.
This is our versioned heuristic index, not source severity or a calibrated probability. Urban PEI does not count unique people.
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) | 39 / 100 |
| Legacy data-support index | 0.89/1 |
| Coordinates | 41.8520, -89.3347 |
| Nearest City | Dixon (12 km) |
| Urban exposure index (PEI) | 73.6K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T01:24:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.659ca0f46afec43d38fff1dedbf86b6f |
Physical priority index · v1. Heuristic priority, not calibrated probability, predictive accuracy or damage. The legacy data-support index combines assigned source support and field availability. Urban PEI is distance-weighted and does not count unique people; zero does not establish that nobody is present. Model cards.
Source and revision timeline
Source: noaa. Occurrence: 2026-07-04T01:24:00.000Z.
First archived: 2026-07-04T01:26:04.321Z. Material modification: not recorded.
Retained revisions are prospective; earlier versions may be unavailable. No revision entry does not prove that a record never changed.
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Rock Island, IL; Lee, IL; Ogle, IL; De Kalb, IL; Kane, IL |
| Headline | Severe Thunderstorm Warning issued July 3 at 8:24PM CDT until July 3 at 8:30PM CDT by NWS Quad Cities IA IL |
| Expires | 2026-07-03T20:34:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.659ca0f46afec43d38fff1dedbf86b6f47ac589e.001.1","noaa_urn:oid:2.49.0.1.840.0.0780746ebecaf353544df11c50bfe4c1bb1bd003.001.1","noaa_urn:oid:2.49.0.1.840.0.347e1d100ea240db94b0bfc0574ae6c4e2d0c8cb.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.
Review the area, threshold and delivery channel in your account.
Want to know when something happens near Dixon?