Right now
The most recent data we hold from NOAA arrived 7 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 12:30 UTC. It is kept here as a record.
It is one of only 3 we have recorded within 20 km of this point since 16 March 2026. The last comparable one was on 16 March 2026.
What the source measured
NOAA reported: Tornado Warning issued May 18 at 6:41AM CDT until May 18 at 7:30AM CDT by NWS St Louis MO
An estimated 58,619 people live within 50 km of this point.
Nearby, since 16 March 2026
- May 18, 2026 · score 63 · 9.0 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 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 | Critical |
| Calamity Score (ours) | 63 / 100 |
| Our confidence | 80% |
| Coordinates | 39.6944, -91.0911 |
| Nearest City | Hannibal (23 km) |
| Population Exposed | 58.6K within 50 km |
| Impact Tier | severe |
| Timestamp | 2026-05-18T11:41:00.000Z |
| Source | https://api.weather.gov/alerts/urn:oid:2.49.0.1.840.0.d7cd45af79e76aab9117b5cc5cdf0207b8398c79.001.1 |
Score Breakdown
Technical Details
| Event | Tornado Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Adams, IL; Pike, IL; Pike, MO; Ralls, MO |
| Headline | Tornado Warning issued May 18 at 6:41AM CDT until May 18 at 7:30AM CDT by NWS St Louis MO |
| Expires | 2026-05-18T07:30:00-05:00 |
| 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 near Hannibal?
Calamity.live data shows a weather event with CalamityScore 63/100, near Hannibal (United States), based on data from noaa. Source: Calamity.live, a platform aggregating real-time data from 185 scientific monitoring sources.