This alert expired on 24 June 2026 at 22:47 UTC. It is kept here as a record.
No stronger detection stands among the 23 recorded within 20 km of this point since 15 March 2026 — 16 others scored the same. Another comparable one was recorded here earlier the same day. 2 more were recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued June 24 at 5:37PM CDT until June 24 at 5:45PM CDT by NWS St Louis MO
An estimated 19,103 people live within 50 km of this point.
Nearby, since 15 March 2026
- June 8, 2026 · score 28 · 19.9 km
- May 18, 2026 · score 34 · 20.0 km
- June 8, 2026 · score 28 · 25.5 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 82 % 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) | 34 / 100 |
| Our confidence | 82% |
| Coordinates | 39.4220, -90.3620 |
| Nearest City | Jacksonville (36 km) |
| Population Exposed | 19.1K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-06-24T22:37:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.e0fc53392d2216aa187a395a9e8cbe7df45587e2.001.1 |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Greene, IL |
| Headline | Severe Thunderstorm Warning issued June 24 at 5:37PM CDT until June 24 at 5:45PM CDT by NWS St Louis MO |
| Expires | 2026-06-24T17:47:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | true |
| Iem TypeSummary | R |
| Iem Magnitude | 1.02 |
| Iem Unit | Inch |
| Iem City | 2 N Alexander |
| Iem County | Morgan |
| Iem State | IL |
| Iem Wfo | ILX |
| Iem Remark | 1.02 inches of rain fell this afternoon reported by SWOP observer. |
| MergedSources | [{"id":"iem_R_39.760_-90.040_1782334320000","source":"iem","severity":"low","severityValue":25,"timestamp":1782334320000,"latitude":39.76,"longitude":-90.04}] |
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 in this area?
Calamity.live data shows a weather event with CalamityScore 34/100 (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.