Right now
The most recent data we hold from NOAA arrived 2 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 24 June 2026 at 23:45 UTC. It is kept here as a record.
It is the 2nd strongest of the 25 detections recorded within 20 km of this point since 16 March 2026. Another comparable one was recorded here earlier the same day. 4 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 24 at 5:57PM CDT until June 24 at 6:45PM CDT by NWS Chicago IL
Urban PEI: 353,053 within a heuristic 50 km radius; not unique people.
Nearby, since 16 March 2026
- August 9, 2026 · score 43 · 7.2 km
- August 9, 2026 · score 43 · 18.3 km
- June 6, 2026 · score 58 · 26.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
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 | 0.78/1 |
| Coordinates | 43.4310, -89.0487 |
| Nearest City | Beaver Dam (17 km) |
| Urban exposure index (PEI) | 353.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-24T22:57:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.0cca2ed0268a10fd280c45f18c57a7f8 |
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: 2026-06-24T22:57:00.000Z.
First archived: 2026-06-24T22:58:46.187Z. 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; Lake, IL; Dane, WI; Lafayette, WI and 7 more areas |
| Headline | Severe Thunderstorm Warning issued June 24 at 5:57PM CDT until June 24 at 6:45PM CDT by NWS Chicago IL |
| Expires | 2026-06-24T18:45:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 11 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.0cca2ed0268a10fd280c45f18c57a7f8a485683f.001.1","noaa_urn:oid:2.49.0.1.840.0.56d0270c36a2ba47684e9bed60c193f5bbac9c47.002.1","noaa_urn:oid:2.49.0.1.840.0.b2ca0b6e2213a8b3c58e68c0e6e088b5d751bd91.002.1","noaa_urn:oid:2.49.0.1.840.0.857c2d874d7315b425a2550007f947422d4fff67.001.1","noaa_urn:oid:2.49.0.1.840.0.f829ef758a25bc92d533355a8a3bd1236c34c191.001.1","noaa_urn:oid:2.49.0.1.840.0.baff235d7258eed4f2f0b185f6a873342de56081.001.1","noaa_urn:oid:2.49.0.1.840.0.fc089fe20a29609fed66a1f494f9038fb65f2cdb.001.1","noaa_urn:oid:2.49.0.1.840.0.1d9e32d2987a287a9ea6814f9fe8e5df3e8d9812.002.1","noaa_urn:oid:2.49.0.1.840.0.2cf749ffb19cc39498027b2a7ea5e210ef04cf77.001.1","noaa_urn:oid:2.49.0.1.840.0.cc435df291952a10f2860f04464cf139d523a24c.001.1","noaa_urn:oid:2.49.0.1.840.0.9fcc369d139770751cf40bb919b9917f93426d6c.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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