Right now
The most recent data we hold from NOAA arrived 5 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 31 May 2026 at 20:45 UTC. It is kept here as a record.
No stronger detection stands among the 85 recorded within 20 km of this point since 15 March 2026 — 29 others scored the same. Another comparable one was recorded here earlier the same day. One more was recorded here in the fortnight before it.
What the source measured
NOAA reported: Severe Thunderstorm Warning issued May 31 at 2:42PM CDT until May 31 at 3:45PM CDT by NWS St Louis MO
An estimated 18,181 people live within 50 km of this point.
Nearby, since 15 March 2026
- July 10, 2026 · score 34 · 13.6 km
How we know
Confirmed by 5 independent sources, including NOAA.
Our own score for this event is 34 out of 100, at 90 % 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 | 90% |
| Coordinates | 37.3633, -90.5488 |
| Nearest City | Farmington (48 km) |
| Population Exposed | 18.2K within 50 km |
| Impact Tier | significant |
| Timestamp | 2026-05-31T19:42:00.000Z |
| Source | https://api.weather.gov/alerts/merged_Severe Thunderstorm Warning_noaa_urn:oid:2.49.0.1.840.0.b91323f9edbc0e2b70ed1d92e767949c |
Score Breakdown
Technical Details
| Event | Severe Thunderstorm Warning |
| Urgency | Immediate |
| Certainty | Observed |
| AreaDesc | Iron, MO; Madison, MO; St. Francois, MO; Wayne, MO |
| Headline | Severe Thunderstorm Warning issued May 31 at 2:42PM CDT until May 31 at 3:45PM CDT by NWS St Louis MO |
| Expires | 2026-05-31T15:45:00-05:00 |
| SenderName | NWS St Louis MO |
| HasExactCoords | true |
| MergedCount | 2 |
| MergedIds | ["noaa_urn:oid:2.49.0.1.840.0.b91323f9edbc0e2b70ed1d92e767949c27c28f83.001.1","noaa_urn:oid:2.49.0.1.840.0.f1452015c2cc1e45b99d717e0e1eca275eab0abb.001.1"] |
| Spc ReportType | wind |
| Spc Speed | UNK |
| Spc Location | 1 E Boss |
| Spc County | Dent |
| Spc State | MO |
| Spc Comments | Tree down across Highway 32. (SGF) |
| Iem TypeSummary | H |
| Iem Magnitude | 0.5 |
| Iem Unit | Inch |
| Iem City | Belgrade |
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.
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