Right now
The most recent data we hold from NOAA arrived 24 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 11 June 2026 at 23:30 UTC. It is kept here as a record.
No stronger detection stands among the 25 recorded within 20 km of this point since 31 March 2026 — 6 others scored the same. The last comparable one was on 18 May 2026.
What the source measured
NOAA reported: Tornado Warning issued June 11 at 6:04PM CDT until June 11 at 6:30PM CDT by NWS Quad Cities IA IL
Urban PEI: 18,342 within a heuristic 50 km radius; not unique people.
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 58 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) | 58 / 100 |
| Legacy data-support index | 0.80/1 |
| Coordinates | 41.2419, -88.9433 |
| Nearest City | Ottawa (15 km) |
| Urban exposure index (PEI) | 18.3K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-11T23:04:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Tornado Warning_noaa_urn:oid:2.49.0.1.840.0.4d08cadbfbaf80bc1640e54e30bf03d5 |
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: 2026-06-11T23:04:00.000Z.
First archived: 2026-06-11T23:06:35.177Z. 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 | Bureau, IL; Cass, IL; Mason, IL; Kenosha, WI; Racine, WI and 3 more areas |
| Headline | Tornado Warning issued June 11 at 6:04PM CDT until June 11 at 6:30PM CDT by NWS Quad Cities IA IL |
| Expires | 2026-06-11T18:30:00-05:00 |
| SenderName | NWS Quad Cities IA IL |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.4d08cadbfbaf80bc1640e54e30bf03d52e7684a6.001.1","noaa_urn:oid:2.49.0.1.840.0.1ecdb9d5fe6551702ae139caddfd57e990ef2c83.002.1","noaa_urn:oid:2.49.0.1.840.0.af95adf5446cc9205309f2cddfc1eff80c2d3285.001.1","noaa_urn:oid:2.49.0.1.840.0.868b46fafc163229208e87309b21c8ed8e2f48f2.001.1","noaa_urn:oid:2.49.0.1.840.0.e8f7db0370b793c75dc7522b8f234da0f29ed330.001.1","noaa_urn:oid:2.49.0.1.840.0.2115dc59c5bf723c08262dd4ee57bc24fa43c6a3.001.1"] |
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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