This alert expired on 15 March 2026 at 21:45 UTC. It is kept here as a record.
No stronger detection stands among the 26 recorded within 20 km of this point since 15 March 2026 — one other scored the same.
What the source measured
NOAA reported: Tornado Warning issued March 15 at 3:59PM CDT until March 15 at 4:45PM CDT by NWS St Louis MO
An estimated 640,331 people live within 50 km of this point.
Nearby, since 15 March 2026
- March 15, 2026 · score 72 · 5.0 km
- May 21, 2026 · score 48 · 6.5 km
- March 15, 2026 · score 48 · 9.4 km
How we know
Confirmed by 2 independent sources, including NOAA.
Our own score for this event is 72 out of 100, at 83 % 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) | 72 / 100 |
| Our confidence | 83% |
| Coordinates | 39.0690, -90.4290 |
| Nearest City | Godfrey (24 km) |
| Population Exposed | 640.3K within 50 km |
| Impact Tier | catastrophic |
| Timestamp | 2026-03-15T20:59:00.000Z |
| Source | https://api.weather.gov/alerts/urn-oid-2_49_0_1_840_0_709b83d5b4b5b07159ab8966a359bda5d1c69812_001_1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Calhoun, IL; Jersey, IL; Lincoln, MO |
| Headline | Tornado Warning issued March 15 at 3:59PM CDT until March 15 at 4:45PM CDT by NWS St Louis MO |
| Expires | 2026-03-15T16:45:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | true |
| Iem TypeSummary | D |
| Iem City | Troy |
| Iem County | Lincoln |
| Iem State | MO |
| Iem Wfo | LSX |
| Iem Remark | Tree down on East Cherry Street with live power lines on the roadway. |
| MergedSources | [{"id":"iem_D_38.980_-90.980_1773607140000","source":"iem","severity":"low","severityValue":25,"timestamp":1773607140000,"latitude":38.98,"longitude":-90.98}] |
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 near Godfrey?
Calamity.live data shows a weather event with CalamityScore 72/100, near Godfrey (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.