Right now
The most recent data we hold from NOAA arrived 1 minute 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 00:45 UTC. It is kept here as a record.
It is the 5th strongest of the 41 detections recorded within 20 km of this point since 15 March 2026. The last comparable one was on 3 July 2026. 10 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 7:06PM CDT until July 3 at 7:45PM CDT by NWS Chicago IL
Urban PEI: 249,512 within a heuristic 50 km radius; not unique people.
Nearby, since 15 March 2026
- July 4, 2026 · score 43 · 12.0 km
- July 3, 2026 · score 43 · 15.4 km
- July 3, 2026 · score 67 · 16.9 km
How we know
2 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 43 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) | 43 / 100 |
| Legacy data-support index | 0.84/1 |
| Coordinates | 42.1869, -89.5094 |
| Nearest City | Freeport (16 km) |
| Urban exposure index (PEI) | 249.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-04T00:06:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.47498e3baac8d304cf548d9029bca3f3 |
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: 2026-07-04T00:06:00.000Z.
First archived: 2026-07-04T00:10:46.780Z. 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 | Boone, IL; De Kalb, IL; Ogle, IL; Carroll, IL; Jo Daviess, IL; Stephenson, IL; Carroll, IL; Jo Daviess, IL; Jackson, IA and 1 more areas |
| Headline | Severe Thunderstorm Warning issued July 3 at 7:06PM CDT until July 3 at 7:45PM CDT by NWS Chicago IL |
| Expires | 2026-07-03T19:45:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 4 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.47498e3baac8d304cf548d9029bca3f37f0622ff.001.1","noaa_urn:oid:2.49.0.1.840.0.25f80f1002c9991fc952a7c7bf5b70deef424cb4.001.1","noaa_urn:oid:2.49.0.1.840.0.becfbc912b19d9f636e8aa036d6aeb1d8649a5f1.001.1","noaa_urn:oid:2.49.0.1.840.0.291044174fd1b6b8e9a55c777c868eb4bbc0fc1d.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_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.
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