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 12 June 2026 at 01:00 UTC. It is kept here as a record.
It is the 9th strongest of the 46 detections recorded within 20 km of this point since 11 March 2026. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 11 at 7:14PM CDT until June 11 at 8:00PM CDT by NWS Chicago IL
Urban PEI: 290,765 within a heuristic 50 km radius; not unique people.
Nearby, since 11 March 2026
- March 11, 2026 · score 45 · 17.6 km
- June 12, 2026 · score 41 · 17.8 km
- August 10, 2026 · score 63 · 19.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 37 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) | 37 / 100 |
| Legacy data-support index | 0.79/1 |
| Coordinates | 41.1645, -88.3360 |
| Nearest City | Bourbonnais (37 km) |
| Urban exposure index (PEI) | 290.8K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-12T00:14:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.de52e42138b2edef16a9ec5a9ce1dd13 |
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: 2026-06-12T00:14:00.000Z.
First archived: 2026-06-12T00:19:28.750Z. 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 | Kane, IL; De Kalb, IL; Ford, IL; Iroquois, IL; Livingston, IL and 3 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 7:14PM CDT until June 11 at 8:00PM CDT by NWS Chicago IL |
| Expires | 2026-06-11T20:00:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 6 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.de52e42138b2edef16a9ec5a9ce1dd130707229e.001.1","noaa_urn:oid:2.49.0.1.840.0.a2b813d2eddf63f2448e594dc7b9e520d02241ed.002.1","noaa_urn:oid:2.49.0.1.840.0.4d1c33754eedd131fdd17b33a7c1c4371796c542.001.1","noaa_urn:oid:2.49.0.1.840.0.a534933837aaf69629ceb319326695bd6b4b3e13.001.1","noaa_urn:oid:2.49.0.1.840.0.5e7b9f715c6a2bf68ec02c90164b6d1459c6ddad.001.1","noaa_urn:oid:2.49.0.1.840.0.713cebf93a47be5b69bab40610034c1d0ed293c3.001.1"] |
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.
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