Right now
The most recent data we hold from NOAA arrived 5 hours 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 00:00 UTC. It is kept here as a record.
No stronger detection stands among the 40 recorded within 20 km of this point since 16 March 2026 — 2 others scored the same. Another comparable one was recorded here earlier the same day. 8 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Tornado Warning issued July 3 at 6:35PM CDT until July 3 at 7:00PM CDT by NWS Chicago IL
Urban PEI: 296,478 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- July 3, 2026 · score 67 · 2.4 km
- July 4, 2026 · score 43 · 2.9 km
- July 4, 2026 · score 43 · 16.2 km
How we know
6 recorded sources include NOAA; independence is not established by this count.
Our own score for this event is 67 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 | Critical |
| Calamity Score (ours) | 67 / 100 |
| Legacy data-support index | 0.89/1 |
| Coordinates | 42.2180, -89.2920 |
| Nearest City | Rockford (18 km) |
| Urban exposure index (PEI) | 296.5K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-07-03T23:35:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.5588ef5f9350d1b0207acdca1d7634ec70903ac5.001.1 |
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: 2026-07-03T23:35:00.000Z.
First archived: 2026-07-03T23:39:25.257Z. 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 | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Ogle, IL; Winnebago, IL |
| Headline | Tornado Warning issued July 3 at 6:35PM CDT until July 3 at 7:00PM CDT by NWS Chicago IL |
| Expires | 2026-07-03T19:00:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | 2 WSW Cortland |
| Iem County | De Kalb |
| Iem State | IL |
| Iem Wfo | LOT |
| Iem Remark | Utility poles down at Peace Road and Fairview Drive in DeKalb. Time estimated by radar. |
| MergedSources | [{"id":"iem_G_41.790_-88.620_1783100940000","source":"iem","severity":"low","severityValue":25,"timestamp":1783100940000,"latitude":41.79,"longitude":-88.62},{"id":"iem_D_41.910_-88.720_1783100400000","source":"iem","severity":"low","severityValue":25,"timestamp":1783100400000,"latitude":41.91,"longitude":-88.72},{"id":"iem_G_41.670_-89.060_1783100220000","source":"iem","severity":"low","severityValue":25,"timestamp":1783100220000,"latitude":41.67,"longitude":-89.06},{"id":"iem_D_42.330_-89.640_1783118280000","source":"iem","severity":"low","severityValue":25,"timestamp":1783118280000,"latitude":42.33,"longitude":-89.64},{"id":"iem_D_41.910_-88.720_1783100280000","source":"iem","severity":"low","severityValue":25,"timestamp":1783100280000,"latitude":41.91,"longitude":-88.72}] |
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 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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