This alert expired on 4 July 2026 at 21:15 UTC. It is kept here as a record.
It is the 12th strongest of the 30 detections recorded within 20 km of this point since 10 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 July 4 at 3:19PM CDT until July 4 at 4:15PM CDT by NWS Chicago IL
Nearby, since 10 March 2026
- June 11, 2026 · score 46 · 5.5 km
- June 12, 2026 · score 16 · 11.5 km
- July 4, 2026 · score 63 · 11.6 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 22 out of 100, at 57 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
Event Data
| Type | Severe weather |
| Severity | medium |
| Calamity Score (ours) | 22 / 100 |
| Our confidence | 57% |
| Coordinates | 40.8283, -88.4442 |
| Nearest City | Normal (58 km) |
| Impact Tier | minor |
| Date | 2026-07-04 — time not reported by the source |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | DuPage, IL; Grundy, IL; Kendall, IL; Will, IL; Vermilion, IL; McLean, IL; Woodford, IL and 2 more areas |
| Headline | Severe Thunderstorm Warning issued July 4 at 3:19PM CDT until July 4 at 4:15PM CDT by NWS Chicago IL |
| Expires | 2026-07-04T16:15:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 5 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.c308c802f3fddc40f8c8822ce712b930b094fed6.001.1","noaa_urn:oid:2.49.0.1.840.0.dd157bc2918ae7bb0fb44a837188971b641cbd97.001.1","noaa_urn:oid:2.49.0.1.840.0.ffd809a80c52d91208b2e2f15ce78ed9565b1aa6.001.1","noaa_urn:oid:2.49.0.1.840.0.5888203049e30e3956f7d52ba5b32005325012e0.001.1","noaa_urn:oid:2.49.0.1.840.0.9178d9a23c5cd3776fed47e4ef79da8b5cc17c08.001.1"] |
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 10 February 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.
Calamity.live data shows a weather event with CalamityScore 22/100, near Normal (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 191 scientific monitoring sources.