Right now
The most recent data we hold from NOAA arrived 4 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 01:45 UTC. It is kept here as a record.
It is the 25th strongest of the 64 detections recorded within 20 km of this point since 3 April 2026. The last comparable one was on 10 June 2026. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 11 at 8:11PM CDT until June 11 at 8:45PM CDT by NWS Chicago IL
Urban PEI: 272,516 within a heuristic 50 km radius; not unique people.
Nearby, since 3 April 2026
- June 10, 2026 · score 37 · 15.8 km
- July 3, 2026 · score 43 · 23.3 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 | 41.8004, -86.7225 |
| Nearest City | Michigan City (18 km) |
| Urban exposure index (PEI) | 272.5K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-12T01:11:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.5dd7eb01b5209ab482eee3963dc89ecc |
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: 2026-06-12T01:11:00.000Z.
First archived: 2026-06-12T01:15:59.924Z. 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 | Cook, IL; DuPage, IL; Will, IL; Cook, IL; Lake, IL; Carroll, IN; Clinton, IN; Fountain, IN; Montgomery, IN; Parke, IN; Tippecanoe, IN; Vermillion, IN; Warren, IN and 4 more areas |
| Headline | Severe Thunderstorm Warning issued June 11 at 8:11PM CDT until June 11 at 8:45PM CDT by NWS Chicago IL |
| Expires | 2026-06-11T20:45:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 7 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.5dd7eb01b5209ab482eee3963dc89ecca05685f0.002.1","noaa_urn:oid:2.49.0.1.840.0.7b5c58a2aaea886a71bd40f2790b24d920472455.001.1","noaa_urn:oid:2.49.0.1.840.0.807b26cc3ac8e76efdc4ecdc1e50394716b0edb5.001.1","noaa_urn:oid:2.49.0.1.840.0.e5268d3121f4393571cfa6a1c3f0c55c4363905c.001.1","noaa_urn:oid:2.49.0.1.840.0.0c2fd4ee54afb9462c0ca66f6ddc4a50b93a0750.001.1","noaa_urn:oid:2.49.0.1.840.0.8746762e6cad4545d0d1d03e3c965162fc2e7a55.001.1","noaa_urn:oid:2.49.0.1.840.0.8fa79d30736c1716606563ccdde3b9ac5474603c.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.
Review the area, threshold and delivery channel in your account.
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