Right now
The most recent data we hold from NOAA arrived 3 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 18 May 2026 at 16:00 UTC. It is kept here as a record.
It is the 8th strongest of the 320 detections recorded within 20 km of this point since 15 March 2026. Another comparable one was recorded here earlier the same day. 5 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 18 at 10:29AM CDT until May 18 at 11:00AM CDT by NWS Chicago IL
An estimated 128,407 people live within 50 km of this point.
Nearby, since 15 March 2026
- May 18, 2026 · score 43 · 1.9 km
- June 12, 2026 · score 37 · 4.7 km
- July 4, 2026 · score 43 · 12.5 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, at 80 % confidence.
The score is ours, computed from intensity, exposed population and local history — not the source’s.
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 |
| Our confidence | 80% |
| Coordinates | 40.0881, -88.4230 |
| Nearest City | Champaign (16 km) |
| Population Exposed | 128.4K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-18T15:29:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.ae166b3b270028922bbb247ef427f848 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Kendall, IL; Will, IL; Champaign, IL; Douglas, IL; Macon, IL; Moultrie, IL; Piatt, IL; Clay, IL; Effingham, IL; Jasper, IL |
| Headline | Severe Thunderstorm Warning issued May 18 at 10:29AM CDT until May 18 at 11:00AM CDT by NWS Chicago IL |
| Expires | 2026-05-18T11:00:00-05:00 |
| SenderName | NWS Chicago IL |
| HasExactCoords | true |
| MergedCount | 3 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.ae166b3b270028922bbb247ef427f8485ef24f67.002.1","noaa_urn:oid:2.49.0.1.840.0.a82326f8c2443bf795748a91a76c757030d3caa1.001.1","noaa_urn:oid:2.49.0.1.840.0.8a5b59dce6c1585e2c2a585a636ebe247870b080.001.1"] |
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.
Want to know when something happens near Champaign?
Calamity.live data shows a weather event with CalamityScore 43/100, near Champaign (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.