This alert expired on 21 June 2026 at 20:30 UTC. It is kept here as a record.
No stronger detection stands among the 10 recorded within 20 km of this point since 15 March 2026 — one other scored the same. The last comparable one was on 16 May 2026.
What the source measured
NOAA reported: Tornado Warning issued June 21 at 2:54PM CDT until June 21 at 3:30PM CDT by NWS St Louis MO
An estimated 78,748 people live within 50 km of this point.
Nearby, since 15 March 2026
- March 15, 2026 · score 63 · 2.7 km
- June 25, 2026 · score 43 · 9.3 km
How we know
One source: NOAA. Not yet confirmed by a second, independent source.
Our own score for this event is 63 out of 100, at 79 % 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 | Critical |
| Calamity Score (ours) | 63 / 100 |
| Our confidence | 79% |
| Coordinates | 38.7967, -89.4667 |
| Nearest City | Edwardsville (42 km) |
| Population Exposed | 78.7K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-06-21T19:54:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.933c896d0d5ffe7db2ff82e1c5ba0547340d5737.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Bond, IL; Madison, IL |
| Headline | Tornado Warning issued June 21 at 2:54PM CDT until June 21 at 3:30PM CDT by NWS St Louis MO |
| Expires | 2026-06-21T15:30:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | true |
Safety Information
If a tornado warning is issued: go to a basement or an interior room on the lowest floor, away from windows. A vehicle and a mobile home are not shelter. Cover your head and neck. Wait for the official all-clear before going outside, and watch for downed power lines and gas leaks afterwards.
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 in this area?
Calamity.live data shows a weather event with CalamityScore 63/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.