This alert expired on 3 July 2026 at 18:15 UTC. It is kept here as a record.
It is the 7th strongest of the 34 detections recorded within 20 km of this point since 3 April 2026. The last comparable one was on 28 June 2026. 9 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued July 3 at 12:21PM CDT until July 3 at 1:15PM CDT by NWS Chicago IL
An estimated 709,013 people live within 50 km of this point.
Nearby, since 3 April 2026
- June 24, 2026 · score 48 · 11.7 km
- June 25, 2026 · score 52 · 11.9 km
- June 24, 2026 · score 52 · 14.0 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 48 out of 100, at 79 % 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) | 48 / 100 |
| Our confidence | 79% |
| Coordinates | 42.2355, -88.7612 |
| Nearest City | Belvidere (7 km) |
| Population Exposed | 709.0K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-07-03T17:21:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.43f6c76d8c8e2d0ec8661532d7d99664 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | De Kalb, IL; La Salle, IL; Lee, IL; Walworth, WI |
| Headline | Severe Thunderstorm Warning issued July 3 at 12:21PM CDT until July 3 at 1:15PM CDT by NWS Chicago IL |
| Expires | 2026-07-03T13:15:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.43f6c76d8c8e2d0ec8661532d7d996645bfce33f.001.1","noaa_urn:oid:2.49.0.1.840.0.8aef9bf778a652f35dba2dace23ea41899b9a944.001.1"] |
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.
Want to know when something happens near Belvidere?
Calamity.live data shows a weather event with CalamityScore 48/100, near Belvidere (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 187 scientific monitoring sources.